JAJSPD0 November 2023 TPS92201 , TPS92201A
PRODMIX
The TPS92201 is a high-efficiency 1.5-A synchronous buck-type LED driver with 2.5-V to 5.5-V input range. The device operates at typically 1.5-MHz pulse width modulation (PWM) mode in full current range. In additional, TPS92201A can support Power Save Mode, the device operates in pulse width modulation (PWM) mode with 1.5-MHz switching frequency at heavy load, similar as TPS92201. But at light load, the device automatically enters pulse frequency modulation (PFM) to maintain high efficiency over the entire load current range. In Power Save Mode, the converter reduces switching frequency and minimizes current consumption, the output voltage rises slightly above the nominal output voltage. This effect is minimized by increasing the output capacitor.
The integrated switches for both deivces have the capability to deliever up to 1.5-A constant current and no need for external Schottky diode. Analog dimming is achieved by adjusting the duty cycle of the PWM in 1% to 100% range. Full protection methods are implemented including LED open, LED short, FB resistor open, FB resistor short and thermal shutdown.