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SSL5021BTS

Part Number	SSL5021BTS
Manufacturer	Silergy
Description	Compact low-ripple buck LED driver
Published	May 25, 2020
Detailed Description	SSL5021BTS Compact low-ripple buck LED driver IC Rev. 2 — 11 March 2015 Product data sheet 1. General description The ...
Datasheet	SSL5021BTS PDF File

Overview

SSL5021BTS Compact low-ripple buck LED driver IC Rev.
2 — 11 March 2015 Product data sheet 1.
General description The SSL5021BTS is a highly integrated, high-precision, non-isolated MOSFET/bipolar buck controller.
It is intended to drive LED lamps in universal mains non-dimmable lighting applications up to 25 W.
The SSL5021BTS is designed for low-ripple applications.
The SSL5021BTS 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 SSL5021BTS 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 SSL5021BTS comes in a compact TSOP6 package.
The SSL5031BTS is suitable for high power factor/Low-THD applications with a high-temperature foldback function.
The SSL5031CTS is best for high power factor/low-THD applications without a high-temperature foldback function.
2.
Features and benefits  Driving LED strings from a rectified mains supply, low-ripple (< ±5 %)  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  Efficient BCM operation with:  Minimal reverse recovery losses in freewheel diode  Zero Current Switching (ZCS) and valley switching for switch turn-on  Minimal inductance value and size required  High efficiency (up to 91 %)  Ultra low IC current during operation (< 150 A)  Auto-recovery protections:  UnderVoltage LockOut (UVLO)  Cycle-by-cycle OverCurrent Protection (OCP)  Internal OverTemperature Protection (OTP)  Output OverVoltage Protection (OVP)  Output ...

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