RT7274/79/80/81

8

DS7274/79/80/81-01 February 2013

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External Bootstrap Capacitor (C6)

Connect a 0.1

μF low ESR ceramic capacitor between

BOOT and SW. This bootstrap capacitor provides the gate

driver supply voltage for the high side N-channel MOSFET

switch.

Over Temperature Protection

The RT7274/79/80/81 includes an over temperature

protection (OTP) circuitry to prevent overheating due to

excessive power dissipation. The OTP will shut down

switching operation when the junction temperature

exceeds 150

°C. Once the junction temperature cools

down by approximately 25

°C the IC will resume normal

operation with a complete soft-start. For continuous

operation, provide adequate cooling so that the junction

temperature does not exceed 150

°C.