LED Driver TPS92201
5-V, 1-A or 1.5-A high-efficiency synchronous buck LED drive
Input voltage typeDC/DCTopologySynchronous BuckVin (min) (V)2.5Vin (max) (V)5.5Vout (max) (V)5.5Vout (min) (V)0.6Iout (max) (A)1.5FeaturesCycle-by-cycle over-current protection, Integrated Switching FET, LED Open Detection, LED Short Detection, Thermal shutdownOperating temperature range (°C)-55 to 125Dimming methodAnalogNumber of channels1RatingCatalog
2.5-V to 5.5-V input voltage range
1.5-A constant output current
Up to 95% efficiency
0.1-µA shutdown current
220-mΩ (HS) / 170-mΩ (LS) MOSFETs
Up to 100% switching duty cycle
1.5-MHz switching frequency
Force PWM mode for low output ripple (TPS92201)
Power save mode for high efficiency in light load (TPS92201A)
0.6-V to VIN output voltage range
100mV feedback regulation voltage
1% to 100% analog dimming with high accuracy
20-kHz to 200-kHz PWM input frequency
Internal soft startup
Full protection with over current, LED open/short, FB resistor open/short
Thermal shutdown protection
Available in WSON-6 package
The TPS92201 is a high-efficiency 1.5-A synchronous buck-type LED driver with 2.5-V to 5.5-V input range. By integrating the high-side and low-side MOSFET, high efficiency and compact solution size can be achieved. The ultra-low 1-µA shutdown current helps saving power in battery-powered applications.
Adaptive off-time with peak current control scheme is adapted in the TPS92201. To get the smallest output ripple, the device operates at typically 1.5-MHz pulse width modulation (PWM) mode in full current range.
Adaptive off-time with peak current control scheme is adapted in the TPS92201A. At medium to heavy load, the device operates in pulse width modulation (PWM) mode with 1.5-MHz switching frequency. At light load, the device automatically enters pulse frequency modulation (PFM) to maintain high efficiency over the entire load current range.
The integrated switches have the capability to deliever up to 1.5-A constant current. Analog dimming is achieved by adjusting the duty cycle of the PWM input with 1% to 100% range. 20kHz to 200kHz input PWM frequency can be supported to avoid audible noise.
For safety and protection, the TPS92201 device implement full protections, including LED open, LED short, FB resistor open, FB resistor short and thermal shutdown.
