SSL5235BTE1Y NXP

SSL5235BTE Mains-dimmable buck LED driver IC 5 Ohm/550 V Rev. 1 16 March 2015 Product data sheet 1. General description The SSL5235BTE is a highly integrated, high-precision buck controller with an internal MOSFET. It is intended to drive low-cost compact dimmable LED lamps up to 12 W. The SSL5235BTE is designed to achieve high power factor and good phase-cut dimming performance. The SSL5235BTE operates in Boundary Conduction Mode (BCM) with constant on-time control. It regulates a constant output current over line and load variations. The wide switching frequency range makes it possible to choose an inductor, which enables the optimization of inductor size, efficiency and EMI. The SSL5235BTE can start up and operate in switching mode directly from line using an external resistor without auxiliary supply. To provide a low-cost driver design, an off-the-shelf inductor can be used, which provides flexibility in application design. 2. Features and benefits Integrated MOSFET (5 /550 V) 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 lifetimeSSL5235BTE NXP Semiconductors Mains-dimmable buck LED driver IC 5 Ohm/550 V 3. Applications The SSL5235BTE is intended for low-cost, non-isolated dimmable lighting applications that work from single mains voltage. 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit 1 V supply voltage operating range 9.9 - 16 V CC R on-state I = 250 mA DSon I(DRAIN) resistance T =25 C-4.9- j T = 125 C-6.7- j I input current on duty cycle < 25 % 0.9 - +0.9 A I(DRAIN) pin DRAIN V input voltage on 0.4 - +550 V I(DRAIN) pin DRAIN 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 SSL5235BTE HSO8 plastic thermal enhanced small outline package 8 leads body width SOT786-1 3.9 mm exposed die pad SSL5235BTE All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 1 16 March 2015 2 of 18