SP2798B Datasheet | SPMICRO

Features - - Active PFC for High power factor and low THD - - Built-in HV start-up and IC power supply circuit, The VDD power supply resistors and power feedback circuits from LED chips are not needed - - 600V high voltage MOSFET integrated - - ±3% LED output current accuracy - - Excellent line and load regulation - Quasi-Resonant (QR) Buck topology - - System efficiency up to 95% - - Ultra low start up & operating current - - Cycle-by-cycle current limit - - LED short protection - - LED open protection - - Over-temperature protection General Description The SP2788Xare built-in HV start-up and IC power supply circuit, main line power up constant current LED regulators with high current accuracy which applies to single stage step-down power factor corrected LED drivers. 600V power MOSFET is integrated, which can significantly simplify the design of LED lighting system. High accuracy of output current is achieved by sampling the output current directly. Quasi Resonant (QR) Buck topology reduces the switching losses and largely increases theefficiency. The SP2788Xare supplied from the main line, the VDD power supply resistors and power feedback circuits from LED chips are not needed, save cost and help for assemble efficiency. The SP2788X have multi-protection functions which largely enhance the safety and reliability of the system, including VDD over-voltage protection, VDD UVLO, shortcircuit protection, LED open protection, cycle-by-cycle current limit and over-temperature protection. The SP2788Xare available in SOP-7package. Typical Application SP1795_REV1.0_2016/08 .spmicro..cn Marking SP2798X SP2798X SOP-7 Remended Operation Conditions Products SP2798A SP2798B SP2798C Symbol ILED1 ILED2 ILED1 ILED2 ILED1 ILED2 Range <150 @VOUT=80V <180 @VOUT=36V <180 @VOUT=80V <240 @VOUT=36V <300 @VOUT=80V <420 @VOUT=36V Unit m A m A m A Pin Description Pin Pin Name Description P pensation Pin for Internal Error Amplifier. Connect a capacitor between the pin and GND to...