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.

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.

图1.SSL2109T方框图

图2.SSL2109T基本应用框图

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.

图4.SSL2109参考板外形图

SSL2109参考板技术指标:



图5.SSL2109参考板电路图
SSL2109参考板材料清单:

SSL2109参考板电感指标:



图6.SSL2109参考板PCB布满图
详情请见:
http://www.nxp.com/documents/data_sheet/SSL2109T.pdf
和
http://www.nxp.com/documents/user_manual/UM10512.pdf