NXP SSL2109T GreenChip 23W LED照明控制方案

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描述

关键词： GreenChip , LED照明 , NXP , SSL2109T

NXP 公司的SSL2109T是高压集成电路,是GreenChip LED照明控制器,具有小PCB面积,效率高达95%.参考设计能工作在230V(50 Hz)或120VAC(50 Hz 或60 Hz),输出电压30V或更高,最大输出功率23W.本文介绍了SSL2109T主要特性,方框图,典型应用电路以及参考设计板主要特性和指标,电路图,材料清单和PCB布局图.

SSL2109T主要特性

•小型印刷电路板（PCB），和紧凑的解决方案

•高效率（高达95％）

•易于集成，具有多保护功能

•经济的电子物料清单（BOM）

该IC是SSL2108X系列的补充，但没有内部开关，采用一个内部高压电流源，从高压电源直接启动。dV/dt电源和漏电电容耦合，或任何其他的辅助电源一起被使用。此功能提供了应用设计的充分的灵活性。内部钳位来限制电源电压。

该IC提供准确的输出电流控制（在5％以内的LED电流精度）。可使用脉冲宽度调制（PWM）调光操作，并具有多种保护功能，包括便捷的LED温度反馈。

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图1 SSL2109T方框图

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图2 SSL2109T基本应用框图

SSL2109T性能

• LED控制器IC用于驱动LED串，或高电压LED模块（从整流电源）

•高效率开关模式的一部分，驱动器产品系列降压

•控制器，具有功率效率边界传导操作模式

–freewheel二极管没有反向恢复损耗

–开关导通零电流开关（ZCS）

–开关关闭的零电压或山谷开关

–电感值和大小较小化

–直接PWM调光

•通过逐周期电流控制，快速瞬态响应

–可以忽略不计的LED电流电源纹波和总电容值

– LED电流没有过流，或低流

–所需LED的正向电压没有分级

•内部保护

–欠压锁定（UVLO）

–前沿消隐（LEB）

–过流保护（OCP）

–短绕组保护（SWP）

–内部过热保护（OTP）

–掉电保护

–输出短路保护（OSP）

•低元件数量LED驱动器解决方案

–没有PWM调光所需的调光开关，和高边驱动器

–单一的NTC，容易外部温度保护

–软启动的功能选项

–在待机时，兼容内置指示灯墙壁开关

– IC的寿命很容易匹配，超过LED灯的寿命

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图3 SSL2109T典型应用电路图

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图4 SSL2109参考板电路图

SSL2109T应用

SSL2109T可用于紧凑，小型的LED灯及单电源输入电压，精确的固定电流输出。主电源输入电压包括，100V，120V和230V（交流）。使用PWM信号，其输出信号可调制,其电压的范围由外部元件决定。

SSL2109参考板

SSL2109是恩智浦半导体的控制器IC，旨在提供低成本，小尺寸的LED驱动器。该参考板工作电压为230V或120V（交流），使用30V或更高的输出电压。

该参考板优化了230V（50Hz）或120V（50Hz或60Hz）的主电源板。除了主电源电压的优化外，该板可以与多个LED一起工作，或与一个具有较高正向电压的LED模块一起工作。其主电源电压的连接不同于其他一般的评估/参考板。电源与螺丝连接器J6连接。

The SSL2109T is a high-voltage Integrated Circuit (IC), intended to drive LED lamps in general lighting applications.

SSL2109T主要特性:

•Small Printed-Circuit Board (PCB) footprint, and compact solution

•High efficiency (up to 95 %)

•Ease of integration and many protection features

•Low electronic Bill Of Material (BOM)

The IC is supplementary to the SSL2108X series, but without internal switch. The IC range has been designed to start up directly from the HV supply by an internal high-voltage current source. Thereafter, the dV/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. This functionality provides full flexibility in the application design. An internal clamp limits the supply voltage.

The IC provides accurate output current control to within 5 % LED current accuracy. The IC can be operated using Pulse-Width Modulation (PWM) dimming and has many protection features including easy LED temperature feedback.

SSL2109T性能和优势:

LED controller IC for driving strings of LEDs or high-voltage LED modules from a rectified mains supply

part of a high-efficiency switch mode buck driver product family

Controller that has power-efficient boundary conduction mode of operation with:

No reverse recovery losses in freewheel diode

Zero Current Switching (ZCS) for switch turn-on

Zero voltage or valley switching for switch turn-off

Minimal required inductance value and size

Direct PWM dimming possible

Fast transient response through cycle-by-cycle current control:

Negligible AC mains ripple in LED current and minimal total capacitor value

No over or undershoots in the LED current

No binning on the LED forward voltage required

Internal Protections:

UnderVoltage LockOut (UVLO)

Leading-Edge Blanking (LEB)

OverCurrent Protection (OCP)

Short-Winding Protection (SWP)

Internal OverTemperature Protection (OTP)

Brownout protection

Output Short Protection (OSP)

Low component count (see Figure 3) LED driver solution:

No dim switch and high-side driver required for PWM dimming

Easy external temperature protection with a single NTC

Option for soft-start function

Compatible with wall switches with built-in indication light during standby

IC lifetime easily matches or surpasses LED lamp lifetime

SSL2109T应用:

The SSL2109T is intended for compact LED lamps with accurate fixed current output for single mains input voltages. Mains input voltages include 100 V, 120 V and 230 V (AC). The output signal can be modulated using a PWM signal. The power range is determined by external components.

2012-5-21 12:51:09 上传

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图1.SSL2109T方框图

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图2.SSL2109T基本应用框图

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图3.SSL2109T典型应用电路图

SSL2109参考板

This document describes the performance, technical data and the connection of the SSL2109 reference board. The SSL2109 is an NXP Semiconductors controller IC intended to provide a low cost, small form factor LED driver. The reference board is intended to operate at 230 V or 120 V (AC), using an output voltage of 30 V or greater.

The board is optimized for a 230 V (50 Hz) or 120 V (50 Hz or 60 Hz) mains supply. In addition to the mains voltage optimization, the board is designed to work with multiple LEDs or an LED module with a high forward voltage. Mains connection of the reference board is different from other general evaluation/reference boards. Connect the mains to the screw connector J6.

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图4.SSL2109参考板外形图

SSL2109参考板技术指标: