Description
® RT8450/B High Voltage Multi-Topology LED Driver General .
The RT8450/B is a current mode PWM regulator for LED driving applications.
Features
* High Voltage : VIN Up to 40V, VOUT Up to 50V
* 1.5A Switch Current
* Buck, Boost or Buck-Boost Operation
* Current Mode PWM with 800kHz (RT8450) and
500kHz (RT8450B) Switching Frenquency
* Easy Dimming : Analog, PWM Digital or PWM
Converting to Analog with One External Capacito
Applications
* With an 1.5A switch on board and wide input (4.5V to 40V) and/or output (up to 50V)ranges the RT8450/B can operate in any of the three common topologies : Buck, Boost or Buck-Boost. With 800k/500kHz operating frequency, the external PWM inductor and input/output capacitors can all be small. High ef