SSL5031CTS Compact high power factor/low-THD buck LED driver IC Rev. 2 11 March 2015 Product data sheet 1. General description The SSL5031CTS 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 SSL5031CTS is designed for high power factor/low-THD applications. The SSL5031CTS 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 SSL5031CTS starts up and operates in switching mode directly from an external resistor without dV/dt supply or auxiliary supply. This feature simplifies the V supply. It CC allows a low-cost off-the-shelf inductor to be used, providing flexibility in application design. The SSL5031CTS comes in a compact TSOP6 package. The SSL5031BTS is best suited for high power factor/low THD applications with a high-temperature foldback function. The SSL5021BTS is suitable for low-ripple applications. 2. Features and benefits 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 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)SSL5031CTS NXP Semiconductors Compact high power factor/low-THD buck LED driver IC Output Short Protection (OSP) Compatible with wall switches with built-in standby indicator lights (Hotaru switch) Extended IC lifetime 3. Applications The SSL5031CTS is intended for low-cost, non-isolated LED lighting applications with accurate fixed current output up to 25 W for single mains or universal mains voltage (90 V (AC) to 277 V (AC)). 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit 1 V supply voltage operating range 9.5 - 16 V CC R on-state resistance of internal switch DSon T =25 C - 0.75 0.90 j T = 125 C - 1.20 - j I input current in pin SW triangle wave 2- +2 A I(SW) duty cycle < 20 % V input voltage on pin current limited at 0.4 - +22 V I(SW) SW 8.8 mA internal switch off 1 An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum I VCC value (see Table 4). 5. Ordering information Table 2. Ordering information Type number Package Name Description Version SSL5031CTS TSOP6 plastic surface-mounted package 6 leads SOT457 SSL5031CTS All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 2 11 March 2015 2 of 18