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SSL5231BT

Part Number	SSL5231BT
Manufacturer	Silergy
Description	Mains-dimmable buck LED driver
Published	May 25, 2020
Detailed Description	SSL5231BT Mains-dimmable buck LED driver IC Rev. 1 — 13 March 2015 Product data sheet 1. General description The SSL52...
Datasheet	SSL5231BT PDF File

Overview

SSL5231BT Mains-dimmable buck LED driver IC Rev.
1 — 13 March 2015 Product data sheet 1.
General description The SSL5231BT is a highly integrated, high-precision buck controller with an external MOSFET.
It is intended to drive LED lamps in dimmable lighting applications up to 25 W.
The SSL5231BT is designed for high power factor, phase-dimmable applications.
The SSL5231BT operates in Boundary Conduction Mode (BCM) with constant on-time control.
It provides a constant output current control with good LED output current accuracy.
Adaptive switching frequency gives freedom to choose the inductor, which enables the optimization of inductor size, efficiency and EMI.
The SSL5231BT can start up and operate in switching mode directly from an external resistor without capacitor charge pump supply or auxiliary supply.
This feature simplifies the VCC supply.
So, a low-cost off-the-shelf inductor can be used, which provides flexibility in application design.
2.
Features and benefits  Supports most available dimming solutions  Deep dimming level  Flicker-free dimming  Low component count ensuring a compact solution and small, single layer Printed-Circuit Board (PCB) footprint  Excellent line regulation and load regulation and good LED output current accuracy  Efficient BCM operation with:  Minimal recovery losses in freewheel diode  Zero Current Switching (ZCS) and Valley switching for turn-on of switch  Minimum inductance value and size required  High efficiency (up to 91 %)  Ultra low IC current during operation (< 165 A)  Auto-recovery protections:  UnderVoltage LockOut (UVLO)  Cycle-by-cycle OverCurrent Protection (OCP)  Internal OverTemperature Protection (OTP)  Output OverVoltage Protection (OVP)  Output Short Protection (OSP)  Extended IC lifetime Silergy Corp.
SSL5231BT Mains-dimmable buck LED driver IC 3.
Applications  The SSL5231BT is intended for low-cost, non-isolated dimmable lighting applications that work from single mains voltage.
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SSL5231BT Mains-dimmable buck LED driver - Silergy

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