LM5035

www.ti.com

SNVS428H – JANUARY 2006 – REVISED OCTOBER 2015

Feature Description (continued)

7.3.14 Thermal Protection

Internal thermal-shutdown circuitry is provided to protect the integrated circuit in the event that the maximum-

rated junction temperature is exceeded. When activated, typically at 165°C, the controller is forced into a low-

power standby state with the output drivers (HO, LO, SR1, and SR2) and the bias regulators (VCC and REF)

disabled. This helps prevent catastrophic failures from accidental device overheating. During thermal shutdown,

the soft-start capacitor is fully discharged, and the controller follows a normal start-up sequence after the junction

temperature falls to the operating level (145°C).

7.4 Device Functional Modes

The LM5035 can be used as a half-bridge PWM controller or as a push-pull PWM controller.

To implement the LM5035 in a push-pull application, the HB pin is connected to VCC and the HS pin is

connected to PGND. The LM5035 will deliver 180º out-of-phase ground-referenced PWM signals to the gates of

the power MOSFETS.

The high-side driver has an HS-to-GND maximum voltage rating of 105 V, but in higher-voltage applications the

high-side MOSFET can be driven with a gate-drive transformer.

Copyright © 2006–2015, Texas Instruments Incorporated

Submit Documentation Feedback

19

Product Folder Links: LM5035