Product #SQ60120EPB25

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0006514 Rev. F

10/13/2015

Page 12

Input:

36-75V

Output:

12

Current:

25A

Package:

Eighth-brick

Applications Section

35A

peak

200ms

20ms

APPLICATION CONSIDERATIONS

Startup Inhibit Period: Figure E details the Start-Up

Inhibit Period for the BusQor module when Vin is applied

with the On/Off pin asserted (enabled). Before time t

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

time t

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 8ms from a Vin start-up.

Once the module recognizes it should be on it waits an

additional 4ms before it starts. When starting from an on/

off event the module has an inhibit time of 200ms 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 15ms typical.

At time t

the BusQor module stops switching immediately. Fall time

from 12V to 0V is dependent on output capacitance load

current, and any parasitic trace inductance in the output

load circuit.

At time t

the BusQor module output begins to build up after the

inhibit period of 200ms 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.

Vin

UVLO

On/Off

(N logic)

OFF

ON

Vout

Fault Inhibit

Start-up

Inhibit

t

Time

Start-Up

12V

12 ms

200 ms

15 ms

Figure E: Power Up/Down Diagram (not to scale) showing Start-Up Inhibit Period.