MAX16821C

19-0881; Rev 0; 7/07 High-Power Synchronous HBLED Drivers with Rapid Current Pulsing www.datasheet4u.com General Description ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ 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 MAX16821A/MAX16821B/MAX16821C The MAX16821A/MAX16821B/MAX16821C pulsewidth-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. The ICs offer average current-mode control that enable the use of MOSFETs with optimal charge and on-resistance figure of merit, t...