General Description

The MAX16821A/MAX16821B/MAX16821C pulse width-modulation (PWM) LED driver controllers provide high output-current capability in a compact package with a minimum number of external components. The MAX16821A/MAX16821B/MAX16821C are suitable for use in synchronous and nonsynchronous step-down (buck), boost, buck-boost, SEPIC, and Cuk LED drivers. A logic input (MODE) allows the devices to switch between synchronous buck and boost modes of operation. These devices are the first high-power drivers designed specifically to accommodate common-anode HBLEDs.

Features

♦ Up to 30A Output Current

♦ True-Differential Remote Output Sensing

♦ Average Current-Mode Control

♦ 4.75V to 5.5V or 7V to 28V Input-Voltage Range

♦ 0.1V/0.03V LED Current-Sense Options Maximize Efficiency (MAX16821B/MAX16821C)

♦ Thermal Shutdown

♦ Nonlatching Output Overvoltage Protection

♦ Low-Side Buck Mode with or without Synchronous Rectification

♦ High-Side Buck and Low-Side Boost Mode with or without Synchronous Rectification

♦ 125kHz to 1.5MHz Programmable/Synchronizable Switching Frequency

♦ Integrated 4A Gate Drivers

♦ Clock Output for 180° Out-of-Phase Operation for Second Driver

♦ -40°C to +125°C Operating Temperature Range

Applications

Front Projectors/Rear Projection TVs

Portable and Pocket Projectors

Automotive Exterior Lighting

LCD TVs and Display Backlight

Automotive Emergency Lighting and Signage