8-Channel LED Driver MAX16807-EEWORLD

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The MAX16807 is an integrated, high-efficiency white or RGB LED driver. This device is designed for LCD backlighting or other LED lighting applications with multiple LED strings. The MAX16807's current-mode PWM controller adjusts the voltage required by the LED array. Depending on the input voltage and LED voltage range, the device can use a boost or buck-boost (SEPIC) topology. The MAX16807 has an 8V to 26.5V input voltage range. A wide frequency adjustment range (20kHz to 1MHz) allows the design to be optimized by trading off efficiency and board space.

The MAX16807 LED driver includes eight open-drain, constant-current sinking LED driver outputs rated for 36V continuous operation. The LED current control circuitry allows current matching between LED strings to be as accurate as ±3%, allowing LED strings with currents greater than 55mA to operate in parallel. An output enable pin can be used to PWM dim all output channels simultaneously. The dimming frequency range is 50Hz to 30kHz, with dimming ratios up to 5000:1. The constant-current output is programmed by a single resistor, and the LED current for each output channel can be adjusted up to 55mA.

The MAX16807 can operate in stand-alone mode or can be controlled by a microcontroller (µC) through an industry-standard 4-wire serial interface.

The MAX16807 features thermal protection, operates over the extended -40°C to +125°C temperature range, and is available in a thermally enhanced, 28-pin TSSOP package with an exposed pad.

Key Features

8 constant current output channels (up to 55mA per channel)

The current matching accuracy of the output terminal is ±3%

Parallel channels allow for higher current per LED string

Rated continuous output voltage: 36V

Output enable pin for PWM brightness adjustment (up to 30kHz)

Single resistor sets LED current for all channels

Wide brightness ratio: up to 5000:1

Low current sense reference (300mV) enables high efficiency

8V to 26.5V input voltage or compatible with higher input voltages using external bias devices

4-wire serial interface controls individual output channels

chart

Reference address：8-Channel LED Driver MAX16807

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