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BTS54220-LBB Datasheet(PDF) 8 Page - Infineon Technologies AG |
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BTS54220-LBB Datasheet(HTML) 8 Page - Infineon Technologies AG |
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8 / 69 page  BTS54220-LBB Overview Data Sheet 8 Rev. 2.1, 2014-12-05 The device provides a current sense signal per channel that is multiplexed to the diagnosis pin IS. It can be enabled and disabled via SPI commands. An over temperature flag per output is provided in the SPI diagnosis word. A multiplexed switch bypass monitor provides short-circuit to V S diagnosis. 27 mΩ channels can be configured to bulb or LED mode for maximum flexibility. The BTS54220-LBB provides a fail-safe feature via a Limp Home Input (LHI) pin and direct Input pins. The power transistors are built by N-channel vertical power MOSFETs with charge pumps. The device is monolithically integrated in SMART technology. Applications • High-side power switch for 12 V in automotive or industrial applications such as lighting, heating, motor driving, energy and power distribution • Especially designed for standard exterior lighting like high beam, low beam, position light, tail light, brake light, parking light, license plate light, indicators and equivalent in the LED technology • Replaces electromechanical relays, fuses and discrete circuits Protective Functions • Reverse battery protection with external components • Short circuit to ground protection • Stable behavior at under voltage • Current limitation • Absolute and dynamic temperature sensor • Thermal shutdown with latch after a limited amount of retries • Overvoltage protection • Loss of ground protection • Electrostatic discharge protection (ESD) Diagnostic Functions • Multiplexed proportional load current sense signal (IS) • Enable function for current sense signal configurable via SPI • High accuracy of current sense signal at wide load current range • Current sense ratio ( k ILIS) configurable for LEDs or bulbs • Very fast diagnosis in LED mode • Feedback on over temperature via SPI • Short circuit to V S detection • Monitoring of Input pins status Application Specific Functions • Fail-safe activation via LHI pin and control via input pins • Enhanced electromagnetic compatibility (EMC) for bulbs as well as LEDs • LED mode selection available • SPI with daisy chain capability • Switch bypass monitoring for detecting short circuit to V S |
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