TPS54200/TPS54201 Synchronous Buck LED Drivers

Texas Instruments TPS54200/TPS54201 Synchronous Buck LED Drivers are 1.5A synchronous buck WLED drivers with 28V maximum input voltage. Current mode operation provides fast transient response and eases loop stabilization. By integrating the MOSFETs and employing the SOT23-6 package, TPS54200/TPS54201 achieves the high-power density and offers a small footprint on the PCB. The Texas Instruments TPS54200/TPS54201 implements analog dimming by changing internal reference voltage proportional to the duty cycle of PWM signal input in analog dimming mode. This device also supports PWM dimming mode, in which the internal reference voltage will be halved to 100mV for higher efficiency. The cycle-by-cycle current limit in the high-side MOSFET protects the converter in overload. It is enhanced by a low-side MOSFET freewheeling current limit, preventing current runaway. There is a low-side MOSFET sinking current limit to prevent excessive reverse current.