MC34846数据手册恩XP中文资料规格书

描述 Description

Overview The MC34846 represents a high efficiency LED driver for use in backlighting LCD displays from 10\" to 17+\". Operating from supplies of 5V to 24V, the IC output voltage can be set up to 51V allowing 15+ LED’s in serial in each of the 6 strings. The maximum current in each string is 30mA. The LED current matching between the 6 strings is within ±1.5%. The LED current is set using a resistor to ground.
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特性 Features

•Integrated step-up (Boost) DC/DC converter with programmable switching frequency

•Input voltage from 5V to 24V

•6-channel PWM driver with 4mA to 30mA LED current and ±1.5% current matching

•10-bit PWM generator with wide frequency range between 400Hz to 25kHz

•PWM frequency conversion from 100Hz to 22kHz input frequency

•Direct PWM control mode up to 75kHz

•Output voltage up to 51V

•500mV minimum feedback voltage across LED channels for low power operation

•Phase shifted PWM outputs

•Shutdown current <1μA

•Fault Detection and Protection: OTP, OVP, LED short, LED open, OCP