TPS92074

SLUSBO7 – AUGUST 2013

www.ti.com

Initial Start-Up

The TPS92074 is designed to achieve instant turn-on using an external linear regulator circuit. The start-up

incorporated to support the use of an auxiliary winding with start-up linear, resistive or coupled capacitor start-up

methods.

VCC Bias Supply

The TPS92074 can be configured to use a linear regulator with or without the use of an auxiliary winding. Using

•

allows the use of inexpensive off-the-shelf inductors as the main magnetic

•

can reduce the size of the required VCC capacitor to as low as 0.1uF

Another consideration when selecting a bias method involves the OVP configuration. Because the feature is

enabled via the VCC pin, an auxiliary winding provides the simplest implementation of output over-voltage

protection.

point all of the device features are enabled. The device loads the initial start-up value as the output reference

Voltage Sense Operation

The VSEN (voltage sense) pin is the only input to the digital controller. The time between the rising edge and the

falling edge of the signal determines converter functions. The pin incorporates internal analog and digital filtering

so that any transition that remains beyond the threshold for more than approximately 150 µs will cause the

device to record a change-of-state.

8

Submit Documentation Feedback

Copyright © 2013, Texas Instruments Incorporated

Product Folder Links: TPS92074