TDK iQA Series User Manual

Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

Dualeta™ iQA Series DC/DC Power Modules

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

• Standard Dual Quarter Brick format

• A single module which can support

all your dual voltage requirements between 1.5V and 5.5V

• 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

• 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 Input under and over voltage o Output over voltage o Current limit o Short circuit o Thermal limit

• Monotonic, tracking start-up

• Starts with pre-biased outputs

• High reliability open frame, surface

mount construction

• Baseplate for improved thermal management

• UL 60950 (US and Canada), VDE 0805, CB scheme (IEC950)

• 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”)

48V Input, 15A Output

Dual Output Quarter Brick

-

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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

Ordering information

Product

Identifier

i Q A 48 015 A 050 M - 0 00

TDK Innoveta

Package

Size

Quarter

Brick

Platform Input

Voltage

Dualeta™ 36-75V 15

Output

Current/

Power

Output

Units

Amps

Main

Output

Voltage

050 – 5.0V 033 – 3.3V

# of

Outputs

Multiple

Safety

Class

Feature Set On/Off Logic Pin Length Trim

00 Positive 0.145” Dual independent pins 01 Negative 0.145” Dual independent pins 02 Positive 0.145” Single tracking pin 03 Negative 0.145” Single tracking pin 04 Positive 0.110” Dual independent pins 05 Negative 0.110” Dual independent pins 06 Positive 0.110” Single tracking pin 07 Negative 0.110” Single tracking pin

Product Offering

Code Input Voltage Output Voltage Output Current Maximum

Output Power

iQA48015A050M-000 36V to 75V 5.0/3.3V 15A 75W 87%

iQA48015A033M-000 36V to 75V 3.3/2.5V 15A 50W 85%

Feature Set

00 – Standard

Efficiency

3320 Matrix Drive Suite 100 Richardson, Texas 75082

Phone (877) 498-0099 Toll Free (469) 916-4747 Fax (877) 498-0143 Toll Free (214) 239-3101

support@tdkinnoveta.com http://www.tdkinnoveta.com/

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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 Vin (+) 5 Output RTN 2 On/Off (-) 6 Vo1 Trim (Optional:

Single tracking trim pin)

3 Vin (-) 7 Vo1 (+) 4 Vo2 (+) A Vo2 Trim (Optional: Omit

for single trim pin option)

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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 Max Unit Notes & Conditions

Continuous Input Voltage -0.5 80 Vdc

Transient Input Voltage --- 100 Vdc 100mS max.

Isolation Voltage Input to Output Input to Baseplate Output to Baseplate

Storage Temperature -55 125 ˚C

Operating Temperature Range (Tc) -40 105* ˚C Maximum baseplate temperature.

* Engineering estimate.

---

1500 1500

500

Vdc Vdc Vdc

Basic insulation Basic insulation Operational insulation

Input Characteristics:

Unless otherwise specified, specificati ons apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.

Characteristic Min Typ Max Unit Notes & Conditions

Operating Input Voltage 36 48 75 Vdc

Maximum Input Current --- --- 3.0* A Vin = 0 to Vin,max

Turn-on Voltage --- 34 --- Vdc

Turn-off Voltage 30* 32 --- Vdc

Hysteresis 0.5* 2 --- Vdc

Startup Delay Time from application of input voltage --- 12 --- mS

Startup Delay Time from on/off --- 10 --- mS

Output Voltage Rise Time --- 50 --- mS

Vo = 0 to 0.1*Vo,nom; On/Off =on, Io=Io,max, Tc=25˚C

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 A2s

Input Reflected Ripple --- 15 --- mApp

Input Ripple Rejection --- 50* --- dB @120Hz

*Engineering Estimate

See input/output ripple measurement figure; BW = 5 MHz

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.

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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 Vout1 Vout2

Output Voltage Tolerance Vout1 Vout2

Efficiency

Line Regulation --- 2 5* mV Vin=Vin,min to Vin,max

Load Regulation --- 5 15* mV Io=Io,min to Io,max

Temperature Regulation --- 10 75* mV Tc=Tc,min to Tc,max

Output Current

Output Current Limiting Threshold

Short Circuit Current

Output Ripple and Noise Voltage Vout1 Vout2

Vout1 Vout2

Output Voltage Adjustment Range Tracking trim option

Dynamic Response: Recovery Time

Transient Voltage

Output Voltage Overshoot during startup Vout1 Vout2

Switching Frequency --- 280 --- kHz Fixed

Output Over Voltage Protection Tracking trim option Vo1 Vo2

3.25

2.46

3.20

2.42

83* 85 --- % Vin=Vin,nom; Io1=7.5A, Io2=7.5A;

0 --- 15 A Sum of output currents, Io1+Io2

--- 19 --- A Vo1 = 0.9*Vo,nom, Tc<Tc,max

--- 3 --- A Vo = 0.25V, Tc = 25˚C; average output

---

90

---

3.7

2.9

3.3

2.5

3.3

2.5

30 25

10 10

---

0.1

80

250 150

---

3.35

2.54

3.40

2.58

80 70

---

110

---

5.0*

4.0*

Vdc Vdc

mVpp mvpp

mVrms mVrms

%Vout,nom %Vout,nom

mS

mV

mV mV

V V

Vin=Vin,nom; Io=Io,max; Tc = 25˚C

Over all rated input voltage, load, and temperature conditions to end of life

Tc = 25˚C

current in current limit hiccup mode

Measured with 47uF Tantalum and 1uF ceramic external capacitance – see input/output ripple measurement figure; BW = 20MHz

di/dt = 0.1A/uS, Vin=Vin,nom; load step from 50% to 75% of Io,max, either output

Io=Io,max,Tc=25˚C

External Load Capacitance 0 --- 5000*& uF

Isolation Capacitance --- 1000 --- pF

Isolation Resistance 10 --- --- MΩ

*Engineering Estimate & Contact Innoveta for applications that require additional capacitance or very low ESR capacitor banks.

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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

η

80

78

76

Efficiency,

74

72

70

0 20 40 60 80 100

Output Cur r en t (% full load) Io1=Io2

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

3.295

3.29

Outpu t Voltage Vo1 (V)

3.285

0123456789101112131415

Output Cur rent Io1 ( A), Io2 = 0A

Typical Output 1 Voltage vs. Load Current at Ta = 25°C. Typical Output 2 Voltage vs. Load Current at Ta = 25°C.

12

10

8

6

4

2

Power Dissipation (W)

0

0 20406080100

Output Current (% full load) Io1=Io2

Vin = 36V Vin = 48V Vin = 75V

2.505

2.5

2.495

2.49

Outp ut Voltage Vo 2 (V)

2.485

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Output Curr e nt Io2 ( A), Io1 = 0A

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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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 Output 1 Current Limit Characteristics vs. Input Voltage at Ta=25 degrees.

3.4

3.35

3.3

3.25

Out put Voltage Vo1 (V)

3.2 10 11 12 13 14 15 16 17 18 19 20

Output Current Io1 (A), Io2 = 0A

Vin = 36V Vin = 48V V in = 75V

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.

Typical Output 2 Current Limit Characteristics vs. Input Voltage at Ta=25 degrees.

2.6

2.55

2.5

2.45

Ou tp ut Vol tag e Vo 2 (V)

2.4 10 11 12 13 14 15 16 17 18 19 20

Output Cur re nt Io2 (A), Io1 = 0A

Vin = 36V Vin = 48V Vin = 75V

1.8

1.6

1.4

1.2

1

0.8

0.6

0.4

Input Current (A)

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

2.5

2

1.5

1

Output Vo1 (V)

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 Vo1 Output Voltage vs. Input Voltage Characteristics

Trim up – tracking trim option

Trim from nominal (%)

Rup (kΩ)

Rup is connected between Trim and RTN.

Trim down – tracking trim option

Trim from nominal (%)

Rdown (kΩ)

Rdown is connected between Trim and Vout2.

+1 +2 +3 +4 +5 +6 +7 +8 +9 +10

46 20.4 12.1 7.9 5.2 3.5 2.2 1.3 .61 0

-1 -2 -3 -4 -5 -6 -7 -8 -9 -10

56.9 25 13.8 8.8 5.8 3.8 2.3 1.3 .43 0

3

2.5

2

1.5

1

Output Vo2 (V)

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 Vo2 Output Voltage vs. Input Voltage Characteristics

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 Vout1 Vout2

Output Voltage Tolerance Vout1 Vout2

Efficiency

Line Regulation --- 2 5* mV Vin=Vin,min to Vin,max

Load Regulation --- 5 15* mV Io=Io,min to Io,max

Temperature Regulation --- 10 75* mV Tc=Tc,min to Tc,max

Output Current

Output Current Limiting Threshold

Short Circuit Current

Output Ripple and Noise Voltage Vout1 Vout2

Vout1 Vout2

Output Voltage Adjustment Range Dual independent trim – standard Tracking trim option

Dynamic Response: Recovery Time

Transient Voltage

Output Voltage Overshoot during startup Vout1 Vout2

Switching Frequency --- 280 --- kHz Fixed

Output Over Voltage Protection Dual independent trim – standard Vo1 Vo2 Tracking trim option Vo1 Vo2

External Load Capacitance 0 --- 5000*& uF

Isolation Capacitance --- 1000 --- pF

Isolation Resistance 10 --- --- MΩ

*Engineering Estimate & Contact TDK Innoveta for applications that require additional capacitance or very low ESR capacitor banks.

4.92

3.25

4.85

3.2 86* 87.5 --- % Vin=Vin,nom; Io1=7.5A, Io2=7.5A;

0 --- 15 A Sum of output currents, Io1+Io2

--- 17 --- A Vo1 = 0.9*Vo,nom, Tc<Tc,max

--- 3 --- A Vo = 0.25V, Tc = 25˚C; average output

---

1.5 90

---

5.6

---

5.6

3.7

5

3.3

5

3.3

40 35

10 10

---

0.1

100

250 150

---

Vo1

---

5.08

3.35

5.15

3.4

80 70

---

5.5

110

---

6.7*

---

7.5*

5.2*

Vdc Vdc

mVpp mvpp

mVrms mVrms

Vdc

%Vout,nom

mS

mV

mV mV

V V

Vin=Vin,nom; Io=Io,max; Tc = 25˚C

Over all rated input voltage, load, and temperature conditions to end of life

Tc = 25˚C

current in current limit hiccup mode

Measured with 47uF Tantalum and 1uF ceramic external capacitance – see input/output ripple measurement figure; BW = 20MHz

Vout2 < (Vo1-0.3V) Either output %Vout,nom

di/dt = 0.1A/uS, Vin=Vin,nom; load step from 50% to 75% of Io,max, either output

Io=Io,max,Tc=25˚C

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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

Electrical Characteristics:

iQA48015A050M: 5V/3.3V, 15A Output

90

88 86

84

(%)

η

82

80 78

76

Efficiency,

74

72 70

0 10203040 5060708090100

Output Curre nt (% Full Load) Io1=Io2

Vin = 36V V in = 48V Vin = 75V

Typical Efficiency vs. Input Voltage at Ta=25°C.

5.02

5.015

5.01

5.005

Output Vo ltage Vo1 (V)

12

11

10

9

8

7

6

5

Power Dissipation (W)

4

3

0 102030405060708090100

Output Current (% Full Load) Io1=Io2

Vin = 36V Vin = 48V Vin = 75V

Typical Power Dissipation vs. Input Voltage at Ta=25°C.

3.32

3.315

3.31

3.305

Outp ut Volt age Vo2 (V)

5

01234567 89101112131415

Output Current Io1 (A), Io2 = 0A

3.3 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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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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 Output 1 Current Limit Characteristics vs. Input Voltage at Ta=25 degrees.

5.1

5.05

5

4.95

Out put Voltage Vo1 (V)

4.9 10 11 12 13 14 15 16 17 18

Outpu t Curr e nt Io1 (A) , Io2 = 0A

Vin = 36V Vin = 48V Vin = 75V

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.

Typical Output 2 Current Limit Characteristics vs. Input Voltage at Ta=25 degrees.

3.4

3.35

3.3

3.25

Ou tp ut Voltag e Vo2 (V)

3.2 10 11 12 13 14 15 16 17 18

Output Current Io2 (A), Io1 = 0A

Vin = 36V Vin = 48V Vin = 75V

2.5

2

1.5

1

Input Current (A)

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 Input Current vs. Input Voltage Characteristics.

11/19

Typical Output Ripple at nominal Input voltage and full balanced load currents at Ta=25 degrees.

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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

Output Vo1 (V)

1

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 Vo1 Output Voltage vs. Input Voltage Characteristics

Trim up – independent trim

Vout1 (V) 5.15 5.25 5.35 5.5

Trim from nominal (%Vo)

Rup1 (kΩ)

Rup1 is connected between Trim1 and Vout1.

Vout2 (V) 3.63 4.0 4.5 5

Trim from nominal (%Vo)

Rup2 (kΩ)

Rup2 is connected between Trim2 and Vout2.

Rup

Trim up resistor values for output voltage adjustment – standard wide trim version.

3.01Vonom 100 %Vo+()⋅



1.225 %Vo()⋅



3% 5% 7% 10%

318 194 141 101

10% 21% 36% 52%

55 28 18 14

301 4.01 %Vo()⋅+

−

%Vo

 

3.5

3

2.5

2

1.5

1

Output Vo2 (V)

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 Vo2 Output Voltage vs. Input Voltage Characteristics

Trim down – independent trim

Vout1 (V) 4.5 3.3 2.5 1.8

Trim from nominal (%Vo)

Rdown1 (kΩ)

Rdown1 is connected between Trim1 and RTN.

Vout2 (V) 2.97 2.5 1.8 1.5

Trim from nominal (%Vo)

Rdown2 (kΩ)

Rdown2 is connected between Trim2 and RTN.

Rdown

1000⋅=

Trim down resistor values for output voltage adjustment – standard wide trim version.

301 4.01 %Vo()⋅−

10% 34% 50% 64%

26 4.8 2.0 0.69

10% 24% 45% 55%

26 8.5 2.7 1.5

%Vo

1000⋅=

Trim up – tracking trim option

Trim from nominal (%)

Rup (kΩ)

Rup is connected between Trim and RTN.

Trim down – tracking trim option

Trim from nominal (%)

Rdown (kΩ)

Rdown is connected between Trim and Vout2.

Trim resistor values for output voltage adjustment – tracking trim option.

+1 +2 +3 +4 +5 +6 +7 +8 +9 +10

50 23 14 9.2 6.4 4.5 3.1 2.1 1.3 0

-1 -2 -3 -4 -5 -6 -7 -8 -9 -10

67 30 17 11 7.8 5.4 3.7 2.4 1.4 0

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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

6

4

2

Io= Io1+Io2 (A) , Io1=Io2

0

20 30 40 50 60 70 80 90 100

Ambie nt Tem peratur e (C)

NC ( 6 0lf m) 100 LFM 200 LFM

300 LFM 400 LFM 600 LFM

Maximum balanced load (Io1=Io2) output current vs. ambient temperature at nominal input voltage for airflow rates natural convection (60lfm) to 600lfm with airflow from pin 3 to pin 1.

16

14

12

10

8

6

Io2 (A), Io 1=0A

4

2

0

20 30 40 50 60 70 80 90 100

Ambient Temperature (C)

NC ( 60lf m) 100 LFM 200 LFM

300 LFM 400 LFM 600 LFM

16

14

12

10

8

6

Io1 (A), Io2=0A

4

2

0

20 30 40 50 60 70 80 90 100

Ambient Tem perature (C)

NC (60lfm) 100 LFM 200 LFM

300 LFM 400 LFM 600 LFM

Maximum Io1 output current (Io2=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.

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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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

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.

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.

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.

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.

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

direction can have a significant impact on the module’s thermal performance.

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

Module Centerline

I R F L O

W

76 (3.0)

AIRFLOW

ir Velocity and Ambient Temperature Measurement Location

ir Passage

Centerline

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 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 (T

) and airflow rate as shown in the

AMB

Adjacent PCB

12.7 (0.50)

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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

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 configurations, the airflow rate for the natural convection condition can vary due to temperature gradients from other heat dissipating components.

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 throughthreaded 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.

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 torquelimiting driver set between 0.35-0.55 Nm (35 in-lbs).

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.

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 performance data.

Operating Information

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.

Thermal Protection 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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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

Remote On/Off 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.

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.

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 (-).

Vin (+)

On/ Off

Vin(-)

On/Off Circuit for positive or negative logic

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.

Two trim configurations are offered on the 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(+)

Vo2(+)

Trim2 Trim1

Rdown1 Rdown2

RTN

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:

Rdown

301 4.01 %Vo()⋅−

%Vo

1000⋅=

The current limit set point does not increase as the module is trimmed down, so the available output power is reduced.

Vo1(+) Vo2(+)

Trim2 Trim1

RTN

Circuit to increase output voltage

Rup2

Rup1

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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

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:

Rup

3.01 Vonom 100 %Vo+()⋅



1.225 %Vo()⋅



−

301 4.01 %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.

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.

Optional Tracking Trim

Vo1(+)

Vo2(+)

Rdown

(Vo2,nom>=2V)

Trim

RTN

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 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.

Rdown

(Vo2,nom<2V)

Vo1(+)

Vo2(+)

Trim



1000⋅=



RTN

Rup

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.

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.

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.

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.

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.

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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

Input/Output Ripple and Noise Measurements

12uH

1 2

Battery

12

220uF

esr<0.1 100KHz

12

33uF

esr<0.7 100KHz

+

Vinput

-

+

Voutput

-

12

Cext

12

RLoad

Reliability

Quality

Warranty

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.

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.

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.

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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Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick

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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 Suite 100 Richardson, Texas 75082

Phone (877) 498-0099 Toll Free (469) 916-4747 Fax (877) 498-0143 Toll Free (214) 239-3101

support@tdkinnoveta.com http://www.tdkinnoveta.com/

Information furnished by TDK I nnoveta is believed to be accurate and reli able. However, TDK Innoveta assumes no

responsibility for it s use, nor for any infri ngement of patents or other r ights of third parti es, which may result from i ts use.

No license is granted by implication or otherwise under any patent or patent right s of TDK Innoveta. TDK Innoveta

components are not designed to be used in appl ications, such as life support systems, wherein failure or malfunction

could result in injury or death. All sal es are subject to TDK Innoveta’s Terms and Condit ions of Sale, which are available

upon request. Specificati ons are subject to change without notice.

is a trademark or registered trademark of TDK Corporation.

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TDK iQA Series User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual