FEATURES

Single Input for High-Side and Low-Side MOSFETs

20- to 40-V Supply

Static (dc) Operation

Cross-Conduction Protected

Undervoltage Lockout

ESD and Short Circuit Protected

Fault Feedback

APPLICATIONS

Power Supplies

Motor Drives

Office Automation

Computer Peripherals

Industrial Controllers

Robotics

Medical Equipment

DESCRIPTION

The Si9976 is an integrated driver for an n-channel MOSFET

half-bridge. Schmitt trigger inputs provide logic signal

compatibility and hysteresis for increased noise immunity. An

internal low-voltage regulator allows the device to be powered

directly from a system supply of 20 to 40 volts. Both half-bridge

n-channel gates are driven directly with low-impedance

outputs. Addition of one external capacitor allows an internal

circuit to level shift both the power supply and logic signal for

the half-bridge high-side n-channel gate drive. An internal

charge pump replaces leakage current lost in the high-side

driver circuit to provide “static” (dc) operation in any output

condition. Protection features include an undervoltage

lockout, cross-conduction prevention logic, and a short circuit

monitor.

The Si9976 is available in both standard and lead (Pb)-free,

14-pin SOIC (surface mount) packages, specified to operate

over the industrial (−40 to 85C) temperature range.