NXP公司的SSL5018TE是集成了MOSFET的高壓集成電路(IC)控制器,輸入電壓高達(dá)230V(AC),具有占位面積小,效率高達(dá)93%,功率因素大于0.95,總諧波失真(THD)小于20%,內(nèi)部集成了多種保護(hù)功能,主要用在無調(diào)光的LED照明包括18W T-LED或更高功率的燈.本文介紹了SSL5018TE主要特性和優(yōu)勢,框圖, PF>0.95驅(qū)動(dòng)電路圖,以及演示板SSL5018DB1124主要特性,電路圖,材料清單和PCB布局圖.
The SSL5018TE is a high-voltage Integrated Circuit (IC) controller with an integrated MOSFET for driving LED lamps in general mains non-dimmable lighting applications. The IC operates with input voltages up to 230 V (AC).
The main benefits of these products are:
• Small Printed-Circuit Board (PCB) footprint, and compact solution
• High efficiency (up to 93 %)
• High input power factor (> 0.95); Low Total Harmonic Distortion (THD; < 20 %)
• Intermediate power factor (PF > 0.7); low ripple (< 5 %); minimum external component count
• Enhanced power capability
• Low electronic Bill Of Material (BOM)
The SSL5018TE operates in Boundary Conduction Mode (BCM) with peak current modulation, providing an input power factor correction. The IC is typically configured to a buck converter. It can start up directly from the HV pin using an internal high-voltage current source. When the converter is switching, VCC is supplied through the DVDT pin by a capacitor coupled to the DRAIN pin or by an 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 IC supply current is 1.3 mA.
The SSL5018TE comes in a compact HSO8 package incorporating an exposed pad to enhance the thermal capability for high-power applications, like 18 W T-LEDs or higher power lamps.
SSL5018TE主要特性和優(yōu)勢:
Driving LED strings from a rectified mains supply
Highly integrated switch mode LED driver with integrated 600 V (DC) power switches
Efficient BCM operation with:
No reverse recovery losses in freewheel diode
Zero Current Switching (ZCS) for turn-on of switch
Zero voltage or valley switching for turn-on of switch
Minimal required inductance value and size
Direct PWM current regulation possible
Fast transient response through peak current mode control:
No overshoots or undershoots in the LED current
Internal protections:
UnderVoltage LockOut (UVLO)
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Internal OverTemperature Protection (OTP)
Brownout protection
Output Short Protection (OSP)
Low BOM LED driver solution:
No Schottky diode required due to ZCS
Option for soft-start function
Compatible with wall switches with built-in standby indicator lights
IC lifetime meets and exceeds the required LED lamp lifetime
SSL5018TE應(yīng)用:
The SSL5018TE is intended for low-cost mains non-dimmable LED lighting applications, including 18 W T-LEDs or higher power lamps, with a high power factor. The IC operates from 100 V (AC) or 120 V (AC) mains voltages. The output current can be modulated using a PWM signal.
圖1. SSL5018TE框圖
圖2. SSL5018TE PF>0.95驅(qū)動(dòng)電路圖
演示板SSL5018DB1124
SSL5018DB1124 - 230 V/18 W T8 non-isolated buck LED driver demo board
This document describes the performance, technical data and the connection of the SSL5018 demo board, using non-isolated buck topology. The SSL5018 is an NXP Semiconductors driver IC in a HSO8 package, intended to provide a low cost, small form factor LED driver design. This SSL5018DB1124 demo board is designed for T8 applications. It is intended to operate at 230 V (AC), with an output voltage around 70 V.
演示板SSL5018DB1124主要特性:
• T8 LED tube application
• Open/short LED string protection
• OverCurrent Protection (OCP) and OverTemperature Protection (OTP)
• PF > 0.96 and THD < 19 % at nominal 230 V (AC) input
• Efficiency > 91 % at nominal 230 V (AC) input
• Compliant with IEC61000-3-2 harmonic standard
• Compliant with EN55015 conducted EMI
• PWM dimming
圖3. 演示板SSL5018DB1124外形圖
圖4. 演示板SSL5018DB1124電路圖
演示板SSL5018DB1124材料清單:
圖5. 演示板SSL5018DB1124 PCB布局圖 |
