Full Bridge Mosfet Driver
The ISL6700 is an 80V/1.25A peak, medium frequency, low cost, half-bridge driver IC available in 8-lead SOIC and 12-lead QFN plastic packages. The low-side and high-side gate drivers are independently controlled and matched to 25ns. This gives the user maximum flexibility in dead-time selection and driver protocol. Undervoltage protection on both the low-side and high-side supplies force the outputs low.
Non-latching, level-shift translation is used to control the upper drive circuit. Unlike some competitors, the high-side output returns to its correct state after a momentary undervoltage of the high-side supply. • Drives 2 N-Channel MOSFETs in Half-Bridge Configuration • Space Saving SO8 and Low RC-S QFN Packages • Phase Supply Max Voltage to 80VDC • Bootstrap Supply Max Voltage to 96VDC • Drives 1000pF Load with Rise and Fall Times Typ. 15ns • TTL/CMOS Compatible Input Thresholds • Independent Inputs for Non-Half-Bridge Topologies • No Start-Up Problems • Low Power Consumption • Wide Supply Range • Supply Undervoltage Protection • QFN Package • Compliant to JEDEC PUB95 MO-220 QFN • Quad Flat No Leads - Package Outline • Pb-Free Available (RoHS Compliant).
The A3922 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a full-bridge (H-bridge) arrangement and is specifically designed for ASIL automotive applications with high-power inductive loads, such as brush DC motors, solenoids and actuators. Full ISO-26262 documentation is available to assist safety critical applications to achieve ASIL-D certification. A unique charge pump regulator provides a programmable gate drive voltage for battery voltages down to 7 V and allows the A3922 to operate with a reduced gate drive, down to 5.5 V. Fired up free download full movie. A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs. The full bridge can be controlled by independent logic level inputs or through the SPI-compatible serial interface. The external power MOSFETs are protected from shoot-through by programmable dead time. Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most short-circuit conditions.
Renesas' large portfolio of driver products comprises half-bridge, full-bridge, low-side, and synchronous buck MOSFET drivers. The bridge driver products. Two-phase pre-driver for automotive DC applications providing full bridge or dual half bridge control.
For safety-critical systems, the integrated diagnostic operation can be verified under control of the serial interface. In addition to providing full access to the bridge control, the serial interface is also used to alter programmable settings such as dead time, VDS threshold, and fault blank time. Detailed diagnostic information can be read through the serial interface. The A3922 is supplied in a 28-pin eTSSOP (suffix ‘LP’). This package is available in lead (Pb) free versions, with 100% matte-tin leadframe plating (suffix –T). ISO 26262 Certified Products have been designed in compliance to the ISO standard at the component level. • Full-bridge MOSFET Driver • Bootstrap gate drive for N-channel MOSFET bridge • Cross-conduction protection with adjustable dead time • Charge pump for low supply voltage operation • Programmable gate drive voltage • 5.5 to 50 V supply voltage operating range • Integrated current sense amplifier • SPI compatible serial interface • Bridge control by direct logic inputs or serial interface • TTL-compatible logic inputs • Open-load detection • Extensive programmable diagnostics • Diagnostic verification • Safety-assist features.