SI9976(1999) View Datasheet(PDF) - Vishay Semiconductors
Part Name
Description
Manufacturer
SI9976 Datasheet PDF : 5 Pages
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N-Channel Half-Bridge Driver
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
Si9976DY
Vishay Siliconix
Si9976
DESCRIPTION
The Si9976DY 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 V.
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 Si9976DY is available in the
14-pin SOIC (surface mount) package, specified to operate
over the industrial (-40 to 85°C) temperature range.
FUNCTIONAL BLOCK DIAGRAM
FaxBack 408-970-5600, request 70016
www.siliconix.com
S-60752-Rev. E, 05-Apr-99
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