RT8471ZSP Datasheet PDF - Richtek

●The RT8471ZSP is a hysteretic high brightness LED Driver with internal switch. The high efficiency continuous mode inductive step-down converter designed for driving single or multiple series connected LEDs from a voltage source higher than the LED voltage. It operates from an input voltage of 7 to 36V and employs hysteretic control with a high-side current sense resistor to set the constant output current. The RT8471 includes an output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. LED brightness control is achieved with PWM dimming from an analogue or PWM input signal.

● Hysteretic control with high-side current sensing

● Up to 97% efficiency

● Typical ±5% LED current accuracy

● Analogue or PWM control signal for LED dimming

● Input under-voltage lockout

● Thermal shutdown protection

● Internal N-MOSFET with 350mR low RDS(ON)

● 300Hz On-board ramp generator