Update: 30 September, 2023
The MAX16807/MAX16808 are integrated, high-efficiency white or RGB LED drivers. They are designed for LCD backlighting and other LED lighting applications with multiple strings of LEDs. The MAX16807/MAX16808’s current-mode PWM controller regulates the necessary voltage to the LED array. Depending on the input voltage and LED voltage range, it can be used with boost or buck-boost (SEPIC) topologies. The MAX16807/MAX16808 feature an 8V to 26.5V input volt- age range. A wide range of adjustable frequency (20kHz to 1MHz) allows design optimization for efficien- cy and minimum board space. The MAX16807/MAX16808 LED drivers include eight open-drain, constant-current-sinking LED driver outputs rated for 36V continuous operation. The LED current- control circuitry achieves ±3% current matching among strings and enables paralleling of outputs for LED string currents higher than 55mA. The output-enable pin is used for simultaneous PWM dimming of all output chan- nels. Dimming frequency range is 50Hz to 30kHz and dimming ratio is up to 5000:1. The constant-current out- puts are single resistor programmable and the LED cur- rent can be adjusted up to 55mA per output channel. The MAX16807/MAX16808 operate either in stand-alone mode or with a microcontroller (µC) using an industry- standard, 4-wire serial interface. The MAX16808 includes circuitry that automatically detects open-circuit LEDs. The MAX16807/MAX16808 include overtemperature protection, operate over the entire voltage range, and feature low standby current.
File format: PDF
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MD5 Checksum: 8A049905A964836BA9B6B695253915BA
Publication date: 04 May, 2012
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PDF Link: MAXIM MAX16807/MAX16808 handbook PDF