SQ60120QPA28PY2 データシートの表示（PDF） - SynQor Worldwide Headquarters

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SQ60120QPA28PY2

Quarter-brick DC-DC Converter

SynQor Worldwide Headquarters 

Technical Specification

Over-Temperature Shutdown: A temperature sensor on the

converter senses the average temperature of the module. The ther-

mal shutdown circuit is designed to turn the converter off when the

temperature at the sensed location reaches the Over-Temperature

Shutdown value. It will allow the converter to turn on again when

the temperature of the sensed location falls by the amount of the

Over-Temperature Shutdown Restart Hysteresis value.

Vin

UVLO

On/Off

(N logic)

OFF

ON

t0 t1

t2 t3

t

Vout

12V

200 ms

Time

12 ms

208 ms

Figure E: Power Up/Down Diagram (not to scale) showing

Start-Up Inhibit Period.

Input: 36-75 V

Output: 12 V

Current: 28 A

Package: Quarter-brick

APPLICATION CONSIDERATIONS

Start-Up Inhibit Period: Figure E details the Start-Up Inhibit

Period for the BusQor modulewhen Vin is applied with the On/

Off pin asserted (enabled). Before time t1, when the input voltage

is below the UVL threshold, the unit is disabled by the Input Under-

Voltage Lockout feature. When the input voltage rises above the

UVL threshold, the Input Under-Voltage Lockout is released, and a

typical Startup Inhibit Period of 8 ms from a Vin start-up. Once

the module recognizes it should be on it waits an additional 4 ms

before it starts. When starting from an on/off event the module

has an inhibit time of 200 ms like our standard products. The

output builds up to 90% or higher of the nominal voltage and

stabilizes to its nominal output voltage in a total time of 8 ms

typical. The the module has a Vout rise time of 4 ms typically.

At time t2, when the On/Off pin is de-asserted (disabled), the

BusQor module stops switching immediately. Fall time from 12 V to 0

V is dependent on output capacitance load current, and any parasitic

trace inductance in the output load circuit.

At time t3, when the On/Off pin is re-asserted (enabled), the

BusQor module output begins to build up after the inhibit period

of 200 ms typical.

Refer to the Control Features section of the data sheet for details on

enabling and disabling methods for N and P logic type modules.

Product # SQ60120QPA28

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2SQ612J Rev. B

06/17/09

Page 11

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