Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Dualeta™ iQA Series DC/DC Power Modules
48V Input, 15A Output
Dual Output Quarter Brick
The Dualeta™ Family is a 75W family of highly versatile,
independently regulated, dual output quarter brick
power modules with output voltage tracking. Its output
current loading scheme is fully flexible: 0 to 15A can be
drawn from either output with no minimum load
requirements. An ultra wide range independent output
trim allows the realization of dual output voltage
combinations between 1.5 and 5.5V. The superior
versatility of the Dualeta™ family substantially reduces
the quantity of distinct part numbers in the end user part
portfolio, lowering cost of ownership.
Features
•
•
•
Monotonic, tracking start-up
Starts with pre-biased outputs
High reliability open frame, surface
mount construction
•
•
Standard Dual Quarter Brick format
A single module which can support
all your dual voltage requirements
between 1.5V and 5.5V
•
•
•
Baseplate for improved thermal
management
UL 60950 (US and Canada), VDE 0805,
CB scheme (IEC950)
•
Two output trim options:
o
Standard Dual Trim – wide range
independent adjustment of either
output, using two trim pins
o
Optional Single Tracking Trim –
adjust both outputs together by 10%
according to industry standard
resistor tables
Patented Technology
Options
•
Optional Single Tracking Trim – using
industry standard resistor tables
Remote on/off (negative logic)
Short Thru-hole pins 2.79 mm (0.110”)
•
•
Independently regulated, tight
tolerance outputs
Flexible loading: 0-15A from either
output, 15A total load
•
•
•
•
•
•
High efficiency – up to 89%
Industry-leading output power: 75W
Basic insulation – 1500 Vdc
Full, auto-recovery protection:
o
o
o
o
o
Input under and over voltage
Output over voltage
Current limit
Short circuit
Thermal limit
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Mechanical Specification
Dimensions are in mm [in]. Unless otherwise specified tolerances are: x.x 0.5 [0.02], x.xx and x.xxx 0.25 [0.010].
Recommended Hole Pattern: (top view)
Pin Assignment:
PIN FUNCTION PIN FUNCTION
1
2
Vin (+)
On/Off (-)
5
6
Output RTN
Vo1 Trim (Optional:
Single tracking trim pin)
Vo1 (+)
Vo2 Trim (Optional: Omit
for single trim pin option)
3
4
Vin (-)
Vo2 (+)
7
A
©2001-2005 TDK Innoveta Inc.
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Absolute Maximum Ratings:
Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device.
Characteristic
Min
-0.5
---
Max
80
Unit
Vdc
Vdc
Notes & Conditions
100mS max.
Continuous Input Voltage
Transient Input Voltage
100
Isolation Voltage
Input to Output
Input to Baseplate
Output to Baseplate
---
---
---
1500
1500
500
Vdc
Vdc
Vdc
Basic insulation
Basic insulation
Operational insulation
Storage Temperature
-55
-40
125
˚C
Operating Temperature Range (Tc)
105*
˚C
Maximum baseplate temperature.
* Engineering estimate.
Input Characteristics:
Unless otherwise specified, specifications apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.
Characteristic
Min
36
Typ
48
---
Max
75
Unit
Vdc
A
Notes & Conditions
Operating Input Voltage
Maximum Input Current
Turn-on Voltage
Turn-off Voltage
Hysteresis
---
3.0*
---
Vin = 0 to Vin,max
---
34
32
2
Vdc
Vdc
Vdc
30*
0.5*
---
---
Vo = 0 to 0.1*Vo,nom; On/Off =on,
Io=Io,max, Tc=25˚C
Startup Delay Time from application of input voltage
Startup Delay Time from on/off
Output Voltage Rise Time
---
---
---
---
12
10
50
---
---
---
mS
mS
mS
A2s
Vo = 0 to 0.1*Vo,nom; Vin = Vi,nom,
Io=Io,max,Tc=25˚C
Io=Io,max,Tc=25˚C, Vo=0.1 to
0.9*Vo,nom
---
Inrush Transient
0.1
See input/output ripple measurement
figure; BW = 5 MHz
Input Reflected Ripple
---
---
15
---
---
mApp
dB
Input Ripple Rejection
50*
@120Hz
*Engineering Estimate
Caution: The power modules are not internally fused. An external input line normal blow fuse with a maximum value of
10A is required; see the Safety Considerations section of the data sheet.
©2002-2005 TDK Innoveta Inc.
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Data:
iQA48015A033M: 3.3V/2.5V, 15A Output
Characteristic
Min
Typ
Max
Unit
Notes & Conditions
Output Voltage Initial Setpoint
Vin=Vin,nom; Io=Io,max; Tc = 25˚C
Vout1
Vout2
3.25
2.46
3.3
2.5
3.35
2.54
Vdc
Vdc
Output Voltage Tolerance
Vout1
Vout2
Over all rated input voltage, load, and
temperature conditions to end of life
3.20
2.42
3.3
2.5
3.40
2.58
Vdc
Vdc
Efficiency
83*
85
---
%
Vin=Vin,nom; Io1=7.5A, Io2=7.5A;
Tc = 25˚C
Line Regulation
---
---
---
0
2
5
5*
15*
75*
15
mV
mV
mV
A
Vin=Vin,min to Vin,max
Io=Io,min to Io,max
Load Regulation
Temperature Regulation
Output Current
10
---
Tc=Tc,min to Tc,max
Sum of output currents, Io1+Io2
Output Current Limiting Threshold
Short Circuit Current
---
---
19
3
---
---
A
A
Vo1 = 0.9*Vo,nom, Tc<Tc,max
Vo = 0.25V, Tc = 25˚C; average output
current in current limit hiccup mode
Output Ripple and Noise Voltage
Vout1
Vout2
Measured with 47uF Tantalum and 1uF
ceramic external capacitance – see
input/output ripple measurement figure; BW =
20MHz
---
---
30
25
80
70
mVpp
mvpp
Vout1
Vout2
---
---
10
10
---
---
mVrms
mVrms
Output Voltage Adjustment Range
Tracking trim option
90
---
110
%Vout,nom %Vout,nom
di/dt = 0.1A/uS, Vin=Vin,nom; load step from
Dynamic Response:
Recovery Time
---
---
0.1
80
---
---
mS
50% to 75% of Io,max, either output
Transient Voltage
mV
Output Voltage Overshoot during startup
Io=Io,max,Tc=25˚C
Vout1
Vout2
---
---
250
150
---
---
mV
mV
Switching Frequency
---
280
---
kHz
Fixed
Output Over Voltage Protection
Tracking trim option
Vo1
Vo2
3.7
2.9
---
---
5.0*
4.0*
V
V
External Load Capacitance
Isolation Capacitance
0
---
1000
---
5000*&
---
uF
pF
---
10
Isolation Resistance
---
MΩ
*Engineering Estimate
& Contact Innoveta for applications that require additional capacitance or very low ESR capacitor banks.
©2002-2005 TDK Innoveta Inc.
℡ (877) 498-0099
5/19
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics:
iQA48015A033M: 3.3V/2.5V, 15A Output
88
86
84
82
80
78
76
74
72
70
12
10
8
6
4
2
0
0
20
40
60
80
100
0
20
40
60
80
100
Output Current (% full load) Io1=Io2
Output Current (% full load) Io1=Io2
Vin = 36V
Vin = 48V
Vin = 75V
Vin = 36V
Vin = 48V
Vin = 75V
Typical Efficiency vs. Input Voltage at Ta=25°C.
Typical Power Dissipation vs. Input Voltage at Ta=25°C.
3.305
3.3
2.505
2.5
3.295
3.29
2.495
2.49
3.285
2.485
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Output Current Io1 (A), Io2 = 0A
Output Current Io2 (A), Io1 = 0A
Typical Output 1 Voltage vs. Load Current at Ta = 25°C.
Typical Output 2 Voltage vs. Load Current at Ta = 25°C.
Typical startup characteristic from On/Off application at full load.
CH3-On/Off, CH1-Vo1, CH2-Vo2
Typical startup characteristic from input voltage application at full
load. CH3-Vin, CH1-Vo1, CH2-Vo2
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics (continued):
iQA48015A033M: 3.3V/2.5V, 15A Output
Typical Vo1 load transient response. Io1 step from 3.75A
to 7.5A with 0.1A/uS, Io2=7.5A. CH1 – Vo1, CH2 – Vo2,
CH4 – Io1.
Typical Vo2 load transient response. Io2 step from 3.75A
to 7.5A with 0.1A/uS, Io1=7.5A. CH1 – Vo1, CH2 – Vo2,
CH4 – Io2.
3.4
3.35
3.3
2.6
2.55
2.5
3.25
2.45
3.2
2.4
10 11 12 13 14 15 16 17 18 19 20
10 11 12 13 14 15 16 17 18 19 20
Output Current Io1 (A), Io2 = 0A
Output Current Io2 (A), Io1 = 0A
Vin = 36V
Vin = 48V
Vin = 75V
Vin = 36V
Vin = 48V
Vin = 75V
Typical Output 1 Current Limit Characteristics vs. Input
Voltage at Ta=25 degrees.
Typical Output 2 Current Limit Characteristics vs. Input
Voltage at Ta=25 degrees.
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
25 30 35 40 45 50 55 60 65 70 75
Input Voltage (V)
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Typical Output Ripple at nominal Input voltage and full
balanced load currents at Ta=25 degrees.
Typical Input Current vs. Input Voltage Characteristics.
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics (continued):
iQA48015A033M: 3.3V/2.5V, 15A Output
3.5
3
3
2.5
2
2.5
2
1.5
1
1.5
1
0.5
0
0.5
0
25 30 35 40 45 50 55 60 65 70 75
25 30 35 40 45 50 55 60 65 70 75
Input Voltage (V)
Input Voltage (V)
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Typical Vo1 Output Voltage vs. Input Voltage
Characteristics
Typical Vo2 Output Voltage vs. Input Voltage
Characteristics
Trim up – tracking trim option
Trim from
nominal (%)
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
0
46
20.4
12.1
7.9
5.2
3.5
2.2
1.3
.61
Rup (kΩ)
Rup is connected between Trim and RTN.
Trim down – tracking trim option
Trim from
nominal (%)
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
0
56.9
25
13.8
8.8
5.8
3.8
2.3
1.3
.43
Rdown (kΩ)
Rdown is connected between Trim and Vout2.
Trim resistor values for output voltage adjustment – tracking trim option.
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Data:
iQA48015A050M: 5V/3.3V, 15A Output
Characteristic
Min
Typ
Max
Unit
Notes & Conditions
Output Voltage Initial Setpoint
Vin=Vin,nom; Io=Io,max; Tc = 25˚C
Vout1
Vout2
4.92
3.25
5
3.3
5.08
3.35
Vdc
Vdc
Output Voltage Tolerance
Vout1
Vout2
Over all rated input voltage, load, and
temperature conditions to end of life
4.85
3.2
5
3.3
5.15
3.4
Vdc
Vdc
Efficiency
86*
87.5
---
%
Vin=Vin,nom; Io1=7.5A, Io2=7.5A;
Tc = 25˚C
Line Regulation
---
---
---
0
2
5
5*
15*
75*
15
mV
mV
mV
A
Vin=Vin,min to Vin,max
Io=Io,min to Io,max
Load Regulation
Temperature Regulation
Output Current
10
---
Tc=Tc,min to Tc,max
Sum of output currents, Io1+Io2
Output Current Limiting Threshold
Short Circuit Current
---
---
17
3
---
---
A
A
Vo1 = 0.9*Vo,nom, Tc<Tc,max
Vo = 0.25V, Tc = 25˚C; average output
current in current limit hiccup mode
Output Ripple and Noise Voltage
Vout1
Vout2
Measured with 47uF Tantalum and 1uF
ceramic external capacitance – see
input/output ripple measurement figure; BW =
20MHz
---
---
40
35
80
70
mVpp
mvpp
Vout1
Vout2
---
---
10
10
---
---
mVrms
mVrms
Output Voltage Adjustment Range
Dual independent trim – standard
Tracking trim option
Vout2 < (Vo1-0.3V)
Either output
%Vout,nom %Vout,nom
1.5
90
---
---
5.5
110
Vdc
Dynamic Response:
Recovery Time
di/dt = 0.1A/uS, Vin=Vin,nom; load step from
50% to 75% of Io,max, either output
---
---
0.1
---
---
mS
mV
Transient Voltage
100
Output Voltage Overshoot during startup
Io=Io,max,Tc=25˚C
Vout1
Vout2
---
---
250
150
---
---
mV
mV
Switching Frequency
---
280
---
kHz
Fixed
Output Over Voltage Protection
Dual independent trim – standard
Vo1
Vo2
5.6
---
---
Vo1
6.7*
---
V
V
Tracking trim option
Vo1
Vo2
5.6
3.7
---
---
7.5*
5.2*
V
V
External Load Capacitance
Isolation Capacitance
0
---
1000
---
5000*&
---
uF
pF
---
10
Isolation Resistance
---
MΩ
*Engineering Estimate
& Contact TDK Innoveta for applications that require additional capacitance or very low ESR capacitor banks.
©2002-2005 TDK Innoveta Inc.
℡ (877) 498-0099
9/19
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics:
iQA48015A050M: 5V/3.3V, 15A Output
12
11
10
9
90
88
86
84
82
80
78
76
74
72
70
8
7
6
5
4
3
0
10
20
30
40
50
60
70
80
90 100
0
10
20
30
40
50
60
70
80
90 100
Output Current (% Full Load) Io1=Io2
Output Current (% Full Load) Io1=Io2
Vin = 36V
Vin = 48V
Vin = 75V
Vin = 36V
Vin = 48V
Vin = 75V
Typical Efficiency vs. Input Voltage at Ta=25°C.
Typical Power Dissipation vs. Input Voltage at Ta=25°C.
5.02
3.32
5.015
5.01
5.005
5
3.315
3.31
3.305
3.3
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Output Current Io1 (A), Io2 = 0A
Output Current Io2 (A), Io1 = 0A
Typical Output 1 Voltage vs. Load Current at Ta = 25°C.
Typical Output 2 Voltage vs. Load Current at Ta = 25°C.
Typical startup characteristic from On/Off application at full load.
CH3-On/Off, CH1-Vo1, CH2-Vo2
Typical startup characteristic from input voltage application at full
load. CH3-Vin, CH1-Vo1, CH2-Vo2
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics (continued):
iQA48015A050M: 5V/3.3V, 15A Output
Typical Vo1 load transient response. Io1 step from 3.75A
to 7.5A with 0.1A/uS, Io2=7.5A. CH1 – Vo1, CH2 – Vo2,
CH4 – Io1.
Typical Vo2 load transient response. Io2 step from 3.75A
to 7.5A with 0.1A/uS, Io1=7.5A. CH1 – Vo1, CH2 – Vo2,
CH4 – Io2.
3.4
3.35
3.3
5.1
5.05
5
3.25
3.2
4.95
4.9
10
11
12
13
14
15
16
17
18
10
11
12
13
14
15
16
17
18
Output Current Io2 (A), Io1 = 0A
Output Current Io1 (A), Io2 = 0A
Vin = 36V
Vin = 48V
Vin = 75V
Vin = 36V
Vin = 48V
Vin = 75V
Typical Output 1 Current Limit Characteristics vs. Input
Voltage at Ta=25 degrees.
Typical Output 2 Current Limit Characteristics vs. Input
Voltage at Ta=25 degrees.
2.5
2
1.5
1
0.5
0
25 30 35 40 45 50 55 60 65 70 75
Input Voltage (V)
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Typical Output Ripple at nominal Input voltage and full
balanced load currents at Ta=25 degrees.
Typical Input Current vs. Input Voltage Characteristics.
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Electrical Characteristics (continued):
iQA48015A050M: 5V/3.3V, 15A Output
6
5
4
3
2
1
0
3.5
3
2.5
2
1.5
1
0.5
0
25 30 35 40 45
50 55 60 65 70 75
25 30 35 40 45 50 55 60 65 70 75
Input Voltage (V)
Input Voltage (V)
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Io1 = Io2 = 0A
Io1 = Io2 = 3.75A
Io1 = Io2 = 7.5A
Typical Vo1 Output Voltage vs. Input Voltage
Characteristics
Typical Vo2 Output Voltage vs. Input Voltage
Characteristics
Trim up – independent trim
Trim down – independent trim
Vout1 (V)
5.15
5.25
5%
5.35
7%
5.5
Vout1 (V)
4.5
3.3
2.5
1.8
Trim from
3%
10%
Trim from
10%
34%
50%
64%
nominal (%Vo)
nominal (%Vo)
318
194
141
101
26
4.8
2.0
0.69
Rup1 (kΩ)
Rdown1 (kΩ)
Rup1 is connected between Trim1 and Vout1.
Rdown1 is connected between Trim1 and RTN.
Vout2 (V)
3.63
4.0
4.5
5
Vout2 (V)
2.97
2.5
1.8
1.5
Trim from
10%
21%
36%
52%
Trim from
10%
24%
45%
55%
nominal (%Vo)
nominal (%Vo)
55
28
18
14
26
8.5
2.7
1.5
Rup2 (kΩ)
Rdown2 (kΩ)
Rup2 is connected between Trim2 and Vout2.
Rdown2 is connected between Trim2 and RTN.
3.01Vonom ⋅(100 + %Vo)
301 + 4.01⋅(%Vo)
301 − 4.01 ⋅(%Vo)
Rup =
⋅1000
−
Rdown =
⋅1000
1.225 ⋅(%Vo)
%Vo
%Vo
Trim up resistor values for output voltage adjustment –
standard wide trim version.
Trim down resistor values for output voltage adjustment –
standard wide trim version.
Trim up – tracking trim option
Trim from
nominal (%)
+1
+2
+3
14
+4
+5
+6
+7
+8
+9
+10
0
50
23
9.2
6.4
4.5
3.1
2.1
1.3
Rup (kΩ)
Rup is connected between Trim and RTN.
Trim down – tracking trim option
Trim from
nominal (%)
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
0
67
30
17
11
7.8
5.4
3.7
2.4
1.4
Rdown (kΩ)
Rdown is connected between Trim and Vout2.
Trim resistor values for output voltage adjustment – tracking trim option.
©2002-2005 TDK Innoveta Inc.
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℡ (877) 498-0099
12/19
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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
Thermal Performance:
iQA48015A050M: 5V/3.3V, 15A Output
16
14
12
10
8
16
14
12
10
8
6
6
4
4
2
2
0
0
20
30
40
50
60
70
80
90
100
20
30
40
50
60
70
80
90
100
Ambient Temperature (C)
Ambient Temperature (C)
NC (60lf m)
300 LFM
100 LFM
400 LFM
200 LFM
600 LFM
NC (60lfm)
300 LFM
100 LFM
400 LFM
200 LFM
600 LFM
Maximum balanced load (Io1=Io2) output current vs.
Maximum Io1 output current (Io2=0) vs. ambient
ambient temperature at nominal input voltage for airflow
rates natural convection (60lfm) to 600lfm with airflow from
pin 3 to pin 1.
temperature at nominal input voltage for airflow rates
natural convection (60lfm) to 400lfm with air flow from pin 3
to pin 1.
16
14
12
10
8
6
4
2
0
20
30
40
50
60
70
80
90
100
Ambient Temperature (C)
NC (60lf m)
300 LFM
100 LFM
400 LFM
200 LFM
600 LFM
Maximum Io2 output current (Io1=0) vs. ambient
temperature at nominal input voltage for airflow rates
natural convection (60lfm) to 400lfm with air flow from pin 3
to pin 1.
The thermal curves provided and the example given above are based upon measurements made in Innoveta’s
experimental test setup that is described in the Thermal Management section. Due to the large number of variables in
system design, Innoveta recommends that the user verify the module’s thermal performance in the end application.
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direction can have a significant impact on
the module’s thermal performance.
Thermal Management:
An important part of the overall system
design process is thermal management;
thermal design must be considered at all
levels to ensure good reliability and lifetime
of the final system. Superior thermal design
and ability to operate in severe application
environments are key elements of a robust,
reliable power module.
Thermal Derating:
For proper application of the power module
in a given thermal environment, output
current derating curves are provided as a
design guideline in the
Adjacent PCB
Module
Centerline
A finite amount of heat must be dissipated
from the power module to the surrounding
environment. This heat is transferred by the
three modes of heat transfer: convection,
conduction and radiation. While all three
modes of heat transfer are present in every
application, convection is the dominant
mode of heat transfer in most applications.
However, to ensure adequate cooling and
proper operation, all three modes should be
considered in a final system configuration.
A
I
R
F
L
12.7
(0.50)
O
W
76 (3.0)
The open frame design of the power module
provides an air path to individual
components. This air path improves heat
conduction and convection to the
surrounding environment, which reduces
areas of heat concentration and resulting hot
spots.
AIRFLOW
Air Velocity and Ambient
Air Passage
Centerline
Temperature Measurement
Location
Test Setup
The thermal performance data of the power
module is based upon measurements
obtained from a wind tunnel test with the
setup shown below. This thermal test setup
replicates the typical thermal environments
encountered in most modern electronic
systems with distributed power
architectures. The electronic equipment in
optical networking, telecom, wireless and
advanced computer systems operate in
similar environments and utilize vertically
mounted PCBs or circuit cards in cabinet
racks.
Wind Tunnel Test Setup
Dimensions are in millimeters and (inches).
Thermal Performance section. The module
temperature should be measured in the final
system configuration to ensure proper
thermal management of the power module.
In all conditions, the power module should
be operated below the maximum operating
temperature shown on the de-rating curve.
For improved design margins and enhanced
system reliability, the power module may be
operated at temperatures below the
The power module, as shown in the figure,
is mounted on a printed circuit board (PCB)
and is vertically oriented within the wind
tunnel. The cross section of the airflow
passage is rectangular. The spacing
between the top of the module or heatsink
(where applicable) and a parallel facing PCB
is kept at a constant (0.5 in). The power
module orientation with respect to the airflow
maximum rated operating temperature.
Heat transfer by convection can be
enhanced by increasing the airflow rate that
the power module experiences. The
maximum output current of the power
module is a function of ambient temperature
(TAMB) and airflow rate as shown in the
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thermal performance figures in the Thermal
Performance section. The curves in the
figures are shown for natural convection
through 3 m/s (600 ft/min). The data for the
natural convection condition has been
collected at 0.3 m/s (60 ft/min) of airflow,
which is the typical airflow generated by
other heat dissipating components in many
of the systems that these types of modules
are used in. In the final system
The system designer must use an accurate
estimate or actual measure of the internal
airflow rate and temperature when doing the
heatsink thermal analysis. For each
application, a review of the heatsink fin
orientation should be completed to verify
proper fin alignment with airflow direction to
maximize the heatsink effectiveness. For
Innoveta standard heatsinks, contact
Innoveta Technologies for latest
configurations, the airflow rate for the natural
convection condition can vary due to
temperature gradients from other heat
dissipating components.
performance data.
Operating Information
Heatsink Usage: For applications with
demanding environmental requirements,
such as higher ambient temperatures or
higher power dissipation, the thermal
performance of the power module can be
improved by attaching a heatsink or cold
plate. The iQA platform is designed with a
base plate with four M3 X 0.5 through-
threaded mounting fillings for attaching a
heatsink or cold plate. The addition of a
heatsink can reduce the airflow requirement,
ensure consistent operation and extend
reliability of the system. With improved
thermal performance, more power can be
delivered at a given environmental condition.
Over-Current Protection
The power modules have current limit
protection to protect the module during
output overload and short circuit conditions.
During overload conditions, the power
modules may protect themselves by
entering a hiccup current limit mode. The
modules will operate normally once the
output current returns to the specified
operating range. There is a typical delay of
100mS from the time an overload condition
appears at the module output until the
hiccup mode will occur.
Output Over-Voltage Protection
The power modules have a control circuit,
independent of the primary control loop that
reduces the risk of over voltage appearing at
the output of the power module during a
fault condition. If there is a fault in the
primary regulation loop, the over voltage
protection circuitry will cause the power
module to enter a hiccup over-voltage mode
once it detects that the output voltage has
reached the level indicated in the Electrical
Data section for the power module of
interest. When the condition causing the
over-voltage is corrected, the module will
operate normally.
Standard heatsink kits are available from
Innoveta Technologies for vertical module
mounting in two different orientations
(longitudinal – perpendicular to the direction
of the pins and transverse – parallel to the
direction of the pins) as shown in the
heatsink Offering section. The heatsink kit
contains four M3 x 0.5 steel mounting
screws and a precut thermal interface pad
for improved thermal resistance between the
power module and the heatsink. The
screws should be installed using a torque-
limiting driver set between 0.35-0.55 Nm (3-
5 in-lbs).
Thermal Protection
During heatsink assembly, the base-plate to
heatsink interface must be carefully
managed. A thermal pad may be required to
reduce mechanical-assembly-related
stresses and improve the thermal
connection. Please contact Innoveta
Engineering for recommendations on this
subject.
When the power module exceeds the
maximum operating temperature, the
module may turn-off to safeguard the power
unit against thermal damage. The module
will auto restart as the unit is cooled below
the over temperature threshold.
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Remote On/Off
Two trim configurations are offered on the
The power modules have an internal remote
On/Off circuit. The user must supply an
open-collector or compatible switch between
the Vin (-) pin and the On/Off pin. The
maximum voltage generated by the power
module at the on/off terminal is 15V. The
maximum allowable leakage current of the
switch is 50uA. The switch must be
capable of maintaining a low signal Von/off
< 1.2V while sinking 1mA.
iQA-series. The standard Dual Independent
Trim offers wide range independent
adjustment of either output, using two trim
pins. The optional Single Tracking Trim
adjusts both outputs together by 10%
according to industry standard resistor
tables. Only a single trim pin is provided.
Dual independent Trim
Vo1(+)
The standard on/off logic is positive logic.
The power module will turn on if the On/Off
is left open and will be off if the On/Off is
connected to Vin (-). If the positive logic
circuit is not being used, the On/Off should
be left open.
Vo2(+)
Trim2
Trim1
Rdown1
Rdown2
RTN
An optional negative logic is available. The
power module will turn on if the On/Off
terminal is connected to Vin (-), and it will be
off if the On/Off is left open. If the negative
logic feature is not being used, On/Off
should be shorted to Vin (-).
Circuit to decrease output voltage
With a resistor between the trim and RTN
terminals, the output voltage is adjusted
down. To adjust the output voltage down a
percentage of Vout (%Vo) from Vo,nom, the
trim resistor should be chosen according to
the following equation:
Vin (+)
On/ Off
301 − 4.01 ⋅(%Vo)
Rdown =
⋅1000
Vin(-)
%Vo
The current limit set point does not increase
as the module is trimmed down, so the
available output power is reduced.
On/Off Circuit for positive or negative
logic
Vo1(+)
Vo2(+)
Output Voltage Adjustment
The output voltages of the power module
may be adjusted by using an external
resistor connected between the Trim
terminal and either the Vo (+) or RTN
terminal. If the output voltage adjustment
feature is not used, the Trim pin(s) should
be left open. Care should be taken to avoid
injecting noise into the power module’s trim
pin. A small 0.01uF capacitor between the
power module’s trim pin and RTN pin may
help avoid this.
Rup1
Rup2
Trim2
Trim1
RTN
Circuit to increase output voltage
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With a resistor between the trim and Vo (+)
terminals, the output voltage is adjusted up.
To adjust the output voltage up a
percentage of Vout (%Vo) from Vo,nom the
trim resistor should be chosen according to
the following equation:
Vo1(+)
Vo2(+)
Trim
RTN
Rup
3.01 Vonom ⋅(100 + %Vo)
301 + 4.01 ⋅(%Vo)
Rup =
⋅1000
−
1.225 ⋅(%Vo)
%Vo
The maximum power available from the
power module is fixed. As the output
voltage is trimmed up, the maximum output
current must be decreased to maintain the
maximum rated power of the module.
Circuit to increase output voltage
With a resistor between the Trim and RTN
terminals, the output voltage is adjusted up.
Refer to the resistor selection tables in the
Electrical Characteristics section for trim
adjustment.
As the output voltage is trimmed, the output
over-voltage set point is not adjusted.
Trimming the output voltage too high may
cause the output over voltage protection
circuit to be triggered.
The maximum power available from the
power module is fixed. As the output
voltage is trimmed up, the maximum output
current must be decreased to maintain the
maximum rated power of the module.
Optional Tracking Trim
Vo1(+)
As the output voltage is trimmed, the output
over-voltage set point is not adjusted.
Trimming the output voltage too high may
cause the output over voltage protection
circuit to be triggered.
Vo2(+)
Rdown
(Vo2,nom<2V)
Rdown
(Vo2,nom>=2V)
Trim
RTN
EMC Considerations: Innoveta power
modules are designed for use in a wide
variety of systems and applications. For
assistance with designing for EMC
compliance, please contact Innoveta
technical support.
Circuit to decrease output voltage
With a resistor between the trim and Vo2(+)
terminals, the output voltage is adjusted
down. For models where the nominal set
point of Vo2 is < 2V, the resistor is instead
tied from trim to Vo1(+). Refer to the
Input Impedance:
The source impedance of the power feeding
the DC/DC converter module will interact
with the DC/DC converter. To minimize the
interaction, a 10-100uF input electrolytic
capacitor should be present if the source
inductance is greater than 4uH.
resistor selection tables in the Electrical
Characteristics section for trim adjustment.
The current limit set point does not increase
as the module is trimmed down, so the
available output power is reduced.
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Input/Output Ripple and Noise Measurements
12uH
1
2
Battery
+
+
Voutput
-
RLoad
Cext
Vinput
-
33uF
220uF
esr<0.1
100KHz
esr<0.7
100KHz
Ground Plane
The input reflected ripple is measured with a current probe and oscilloscope. The ripple current is the current through the
12uH inductor.
The output ripple measurement is made approximately 9 cm (3.5 in.) from the power module using an oscilloscope and
BNC socket. The capacitor Cext is located about 5 cm (2 in.) from the power module; its value varies from code to code
and is found on the electrical data page for the power module of interest under the ripple & noise voltage specification in
the Notes & Conditions column.
Reliability
The power modules are designed using TDK Innoveta’s stringent design guidelines for
component derating, product qualification, and design reviews. Early failures are screened out by
both burn-in and an automated final test.
Improper handling or cleaning processes can adversely affect the appearance, testability, and
reliability of the power modules. Contact Innoveta technical support for guidance regarding
proper handling, cleaning, and soldering of TDK Innoveta’s power modules.
Quality
TDK Innoveta’s product development process incorporates advanced quality planning tools such
as FMEA and Cpk analysis to ensure designs are robust and reliable. All products are
assembled at ISO certified assembly plants.
Warranty
TDK Innoveta’s comprehensive line of power solutions includes efficient, high-density DC-DC
converters. TDK Innoveta offers a three-year limited warranty. Complete warranty information is
listed on our web site or is available upon request from TDK Innoveta.
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Safety Considerations
For safety agency approval of the system in which the DC-DC power module is installed, the
power module must be installed in compliance with the creepage and clearance requirements of
the safety agency. The isolation is basic insulation. For applications requiring basic insulation,
care must be taken to maintain minimum creepage and clearance distances when routing traces
near the power module.
As part of the production process, the power modules are hi-pot tested from primary and
secondary at a test voltage of 1500Vdc.
To preserve maximum flexibility, the power modules are not internally fused. An external input
line normal blow fuse with a maximum value of 15A is required by safety agencies. A lower value
fuse can be selected based upon the maximum dc input current and maximum inrush energy of
the power module.
When the supply to the DC-DC converter is less than 60Vdc, the power module meets all of the
requirements for SELV. If the input voltage is a hazardous voltage that exceeds 60Vdc, the
output can be considered SELV only if the following conditions are met:
1) The input source is isolated from the ac mains by reinforced insulation.
2) The input terminal pins are not accessible.
3) One pole of the input and one pole of the output are grounded or both are kept floating.
4) Single fault testing is performed on the end system to ensure that under a single fault,
hazardous voltages do not appear at the module output.
3320 Matrix Drive
Information furnished by TDK Innoveta is believed to be accurate and reliable. However, TDK Innoveta assumes no
Suite 100
responsibility for its use, nor for any infringement of patents or other rights of third parties, which may result from its use.
Richardson, Texas 75082
No license is granted by implication or otherwise under any patent or patent rights of TDK Innoveta. TDK Innoveta
components are not designed to be used in applications, such as life support systems, wherein failure or malfunction
Phone (877) 498-0099 Toll Free
could result in injury or death. All sales are subject to TDK Innoveta’s Terms and Conditions of Sale, which are available
(469) 916-4747
upon request. Specifications are subject to change without notice.
Fax
(877) 498-0143 Toll Free
(214) 239-3101
is a trademark or registered trademark of TDK Corporation.
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