Compact high power factor/low-THD buck LED driver IC

Topologie: Buck
Eingangsspannung (min.): 230.00 V
Eingangsspannung (max.): 230.00 V
Ausgang 1: 80.00 V / 0.100 A

Erstveröffentlichung am 14.10.2014, Version 2 vom


The SSL5031BTS is a highly integrated, high-precision, non-isolated buck controller with external MOSFET. It is intended to drive LED lamps in universal mains non-dimmable lighting applications up to 25 W. The SSL5031BTS is designed for high power factor/low-THD applications.The SSL5031BTS operates in Boundary Conduction Mode (BCM) with on-time regulation. Operating in BCM provides a constant output current control with high accuracy. Adaptive switching frequency gives freedom to choose the inductor, which enables the optimization of inductor size, efficiency and EMI.The SSL5031BTS starts up and operates in switching mode directly from an external resistor without dV/dt supply or auxiliary supply. This feature simplifies the VCC supply. It allows a low-cost off-the-shelf inductor to be used, providing flexibility in application design.The SSL5031BTS comes in a compact TSOP6 package. -The SL5021BTS is suitable for Low-ripple applications. The SSL5031CTS is best for high power factor/Low-THD applications without high temperature foldback function.


  • Driving LED strings from a rectified mains supply, high power factor/low-THD
  • Small electronic Bill of Materials (BOM) enabling a compact solution and a small, single layer Printed-Circuit Board (PCB) footprint
  • Excellent line and load regulation and LED output current accuracy (< ±3 %)
  • Efficient BCM operation with:No reverse recovery losses in freewheel diode
  • Zero Current Switching (ZCS) and valley switching
  • Minimal inductance value and size required
  • High efficiency (up to 93 %)
  • Ultra low IC current during operation (< 150 μA)
  • Many auto-recovery protections:
  • UnderVoltage LockOut (UVLO)
  • Cycle-by-cycle OverCurrent Protection (OCP)
  • Internal OverTemperature Protection (OTP)
  • Output Overvoltage Protection (OVP)
  • Output Short Protection (OSP)
  • Thermal foldback protection via a single PTC or NTC resistorRemarks:(Application note)L1=3.3mH And L2=680uHUsed Refer Page no.29


  Artikel Nr. SPEC Produktserie L
RDC max.
RDC typ.
7447720222 PDF WE-TI Tonneninduktivität 2200 0.29 4730 4160 1.1