MAX25610A/MAX25610B Synchronous Buck and Buck-Boost LED Driver/DC-DC Converter Pin Description (continued)PINNAMEFUNCTIONREFTSSOPTQFNSUPPLY 13 11 COMP Compensation Network Connection. For proper compensation, connect a suit- able RC network from COMP to AGND and a capacitor from COMP to AGND. 14 12 OUT Overvoltage Sense. Connect OUT to a resistor divider from LED+ to AGND. The typical overvoltage threshold is 3V. LED Current-Sense Input. Connect FB to external LED current-sense resistor 15 13 FB for external sense of LED current. Connect FB to VCC through a 100kΩ resis- tor to enable internal current-sense regulation. Analog Dimming Control Input. In external current-sense mode, the voltage at REFI sets the LED current level when VREFI < 1.25V. This voltage reference can be set using a resistive divider from the VCC output. For VREFI > 1.25V an internal reference sets the LED current. The LED current with external 16 14 REFI (V current sense is given by I REFI − 0.2) LED = . In internal current-sense 6.67RLED mode, a resistor connected between REFI and AGND sets the current regulation. The LED current is given by ILED = 13125 . RREFI www.maximintegrated.com Maxim Integrated │ 10
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