The TPS92551 Constant Current Buck LED Driver Micro-Module drives maximum 450 mA LED current up to 16 LEDs
in a single string (maximum 23W). It integrates all the power
components including the power inductor.The TPS92551 provides
a full turn-key , highly efficient solution for wide range
of single string LED lighting applications with up to 95% power
efficiency. The TPS92551 accepts an input voltage ranging
from 4.5V to 60V and delivers a 350 mA LED current as default.
The LED current is adjustable from 300 mA to 450 mA by
charging a single external resistor.
The module operates at constant switching frequency
(800 kHz) with low Electro Magnetic Interference(EMI) complying
with EN55015 standard. The module has fast control
loop to realize fine LED current pulse yielding 256–step PWM
dimming resolution at 240 Hz for general lighting. Protection
features include thermal shutdown, input under-voltage lockout,
LED open-circuit and short-circuit protections. The TPS92551 Micro-Module is available in TO-PMOD 7 pin power package.