Vishay Active Discharge Circuits for 800V Systems
Vishay Active Discharge Circuits for 800V Systems feature high pulse load surface-mounted wire-wound resistors, carbon film MELF resistors, and thick film technology resistors. This reference design follows the steps required to discharge a DC-link bus voltage of 850V to 60V in less than 2 seconds for a capacitor of 500µF. Additionally, for proper active discharge, it is required that the circuitry repeats the discharge process three times within 15 seconds, and these active discharge circuits from Vishay fulfill that requirement.
Features
- High pulse load surface-mounted wire-wound resistors, carbon film MELF resistors, and thick film technology resistors
- Low part count isolated gate drive circuit without the need for an external power supply
Key Components
Vishay Semiconductors VOMDA1271 Automotive MOSFET Driver
Offers all the required current to drive the internal circuitry from the infrared emitter.
Vishay / Beyschlag CMB 0207 Carbon Film MELF Resistors
Features advanced pulse load capability and protects input lines from surge pulses.
Vishay / Draloric AC-AT Cemented Leaded Wirewound Resistors
Offer a 560Ω to 10kΩ resistance range, up to 10W rated dissipation, and ±5% resistance tolerance.
Vishay / Sfernice LTO 150 Clip-Mount Power Resistors
AEC-Q200 qualified and offers a 150W power rating and tolerance ratings of ±1%, ±2%, ±5%, and ±10%.
Functional Block Diagram
Pin Configuration
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