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MC34844 - 10 Channel LED Backlight Driver

General Description

of each pin can be found in the Functional Pin Description section beginning on page 13.

Table 2.

Key Features

  • LED overtemperature protection, LED short protection, and LED open circuit protection. The IC includes overvoltage protection, overcurrent protection, and undervoltage lockout. LED DRIVER EP SUFFIX (PB-FREE) 98ASA10800D 32-PIN QFN-EP.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Freescale Semiconductor Technical Data 10 Channel LED Backlight Driver with Integrated Power Supply Document Number: MC34844 Rev. 10.0, 8/2014 34844 The 34844 is a SMARTMOS high efficiency, LED driver for use in backlighting LCD displays from 10" to 20"+. Operating from supplies of 7.0 to 28 V, the MC34844 is capable of driving up to 160 LEDs in 10 parallel strings. Current in the 10 strings is matched to within 2%, and can be programmed via the I2C/SM Bus interface. The 34844 also includes a Pulse Width Monitor (PWM) generator for LED dimming. The LEDs can be dimmed to one of 256 levels, programmed through the I2C/SM Bus interface. Up to 65,000:1 (256:1 PWM, 256:1 Current DAC) dimming ratio.