MAX17129 - Maxim Integrated Products

MAX17129 (MAX17129 / MAX17149) 6-String WLED Drivers

The MAX17129/MAX17149 are high-efficiency drivers for white LEDs. They are designed for small- to mediumsized LCDs that employ an array of LEDs as the light source. An internal switch step-up controller with QuickPWM™ drives the LED array, which can be configured for up to 6 strings in parallel and either 11 LEDs (MAX17129) or 6 LEDs in series (MAX17149) per.

Features

to protect the controller from fault conditions. Separate voltagefeedback loops limit the output voltage to safe operation. The open- and short-LED detection shuts down the faulty string while keeping other strings operating normally. The devices feature cycle-by-cycle current limit on the internal switch to provide consistent operation and softstart capability. If the devices are in current-limit condition, the step-up converter is latched off after an internal timer expires. A thermal-shutdown circuit provides another level of protection and prevents ICs from damage. The ICs’ step-up control.