QHW050F71 Datasheet QHW050F71 | P4-P6

4 Lineage Power

Data Sheet

April 2008

36 to 75 Vdc Input, 3.3 Vdc Output; 33 W

QHW050F71 Power Modules; dc-dc Converters:

General Specifications

Feature Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature

conditions. See the Feature Descriptions section for additional information.

* These are manufacturing test limits. In some situations, results may differ.

Solder, Cleaning, and Drying Considerations

Post solder cleaning is usually the final circuit-board assembly process prior to electrical testing. The result of inad-

equate circuit-board cleaning and drying can affect both the reliability of a power module and the testability of the

finished circuit-board assembly. For guidance on appropriate soldering, cleaning, and drying procedures, refer to

Lineage Power Board-Mounted Power Modules Soldering and Cleaning Application Note (AP01-056EPS).

Parameter Min Typ Max Unit

Calculated MTBF (I

O = 80% of IO, max; TC = 40 °C) 2,200,000 hours

Weight — — 75 (2.7) g (oz.)

Parameter Symbol Min Typ Max Unit

Remote On/Off Signal Interface

I = 0 V to 75 V; open collector or equivalent compatible;

signal referenced to V

I(–) terminal):

Logic Low—Module On

Logic High—Module Off

Logic Low:

At I

on/off = 1.0 mA

At V

on/off = 0.0 V

Logic High:

At I

on/off = 0.0 µA

Leakage Current

Turn-on Time (See Figure 6.)

O = 80% of IO, max; VO within ±1% of steady state)

on/off

Ion/off

Von/off

Ion/off

—

1.2

1.0

µA

Output Voltage Adjustment:

Output Voltage Remote-sense Range

Output Voltage Set-point Adjustment Range (trim)

—

0.5

110

O, nom

Output Overvoltage Protection VO, sd 3.8* — 4.5* V

Overtemperature Protection T

C —105— °C

Data Sheet

April 2008

Lineage Power 5

36 to 75 Vdc Input, 3.3 Vdc Output; 33 W

QHW050F71 Power Modules; dc-dc Converters:

Characteristic Curves

The following figures provide typical characteristics for the power modules.

8-3261(F)

Figure 1. Typical QHW050F71 Input

Characteristics at Room Temperature

8-3263(F)

Figure 2. Typical QHW050F71 Converter Efficiency

vs. Output Current at Room Temperature

8-3265(F)

Note: See Figure 8 for test conditions.

Figure 3. Typical QHW050F71 Output Ripple

Voltage at Room Temperature; I

O = IO, max

1.4

INPUT VOLTAGE, V

I (V)

INPUT CURRENT, II (A)

25 30 35 40 45 50 55 60 65 70 75 80

1.2

0.8

0.6

0.4

0.2

IO = 10 A

O = 5.5 A

O = 1 A

OUTPUT CURRENT, I

O (A)

EFFICIENCY, η (%)

2345678910

VI = 75 V

I = 48 V

I = 36 V

OUTPUT VOLTAGE, VO (V)

(50 mV/div)

TIME, t (1 μs/div)

VI = 36 V

VI = 48 V

VI = 75 V

6 Lineage Power

Data Sheet

April 2008

36 to 75 Vdc Input, 3.3 Vdc Output; 33 W

QHW050F71 Power Modules; dc-dc Converters:

Characteristic Curves (continued)

8-3267(F)

Note: Tested with a 1000 µF aluminum and a 1.0 µF ceramic capaci-

tor across the load.

Figure 4. Typical QHW050F71 Transient Response

to Step Increase in Load from 50% to

75% of Full Load at Room Temperature

and 48 Vdc Input. (Waveform Averaged

to Eliminate Ripple Component.)

1-0088

Note: Tested with a 1000 µF aluminum and a 1.0 µF ceramic capaci-

tor across the load.

Figure 5. Typical QHW050F71 Transient Response

to Step Decrease in Load from 50% to

25% of Full Load at Room Temperature

and 48 Vdc Input. (Waveform Averaged

to Eliminate Ripple Component.)

8-3269(F)

Figure 6. Typical Start-Up from Remote On/Off;

O = IO, max

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

TIME, t (100 μs/div)

OUTPUT CURRENT, IO (A)

(2 A/div)

TIME, t (50 μs/div)

OUTPUT VOLTAGE, VO (V)

(100 mV/div)

OUTPUT CURRENT, IO (A)

(1 A/div)

REMOTE ON/OFF,

VON/OFF (V)

TIME, t (5 ms/div)

OUTPUT VOLTAGE, VO (V)

(1 V/div)

9400 μF

3300 μF

800 μF

NO CAP

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P17

QHW050F71

Mfr. #:

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Description:

DC DC CONVERTER 3.3V 33W

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