NXPSSL2103 14W dimmable LED driver solution

NXP's SSL2103 is a dimmable Greenchip controller for LED lighting, suitable for flyback and buck configuration applications. The device supports most dimming solutions, has the best efficiency, neutral dimming curve can be logarithmically corrected to 1%, over-temperature protection (OTP), winding short circuit protection (SWP) and over-current protection (OCP). This article introduces the main features and advantages of SSL2103, block diagram, brightness control block diagram, buck and flyback configuration application circuit diagram, as well as the main indicators of SSL2103 demonstration board, 230 V (AC) 14 W A55 LED flyback circuit diagram and bill of materials.

SSL2103: Dimmable Greenchip controller for LED lighting

The SSL2103 is a Switched Mode Power Supply (SMPS) controller IC that operates in combination with a phase cut dimmer directly from the rectified mains. It is designed to drive LED devices. The device includes a circuit to allow direct start-up from the rectified mains voltage.

For dimmer applications, an integrated dedicated circuitry optimizes the dimming curve.

• SSL2101: fully integrated LED driver for lamps up to 10 W

• SSL2102: fully integrated LED driver for lamps up to 25 W

• SSL2103: gives the application designer flexibility to:

Use an external power switch to allow the IC to provide any power

– Use an external bleeder transistors to provide extended dimmer interoperability

SSL2103 Key Features and Benefits:

 Easy migration to existing lighting control infrastructure

 Supports most available dimming solutions

 Optim ized efficiency with valley switching managed by a built-in circuitry

∎ Demagnetization detection

∎ OverTemperature Protection (OTP)

∎ Short-Winding Protection (SWP) and OverCurrent Protection (OCP)

∎ Internal VCC generation allowing start-up from the rectified mains voltage

∎ Natural dimming curve by logarithmic correction, down to 1 %

∎ Suitable for flyback and buck applications

SSL2103 applications:

∎ SSL applications with various power requirements

∎ LED modules such as spots and down-lights

 LED strings suitable for retail displays, etc.Figure

1. SSL2103 block diagram

Figure 2. SSL2103 brightness control block diagram

Figure 3. SSL2103 buck configuration application circuit diagram

Figure 4. SSL2103 flyback configuration application circuit diagramSSL2103

demonstration boardThis

user manual describes a demonstration (demo) board for evaluating an AC mains LED driver with a dimmer for 14 W, A55 LEDs using the SSL2103. It describes key features and connections to aid the design of LED drivers for typical applications.

The demo board operates from an AC mains voltage of 230 V (AC) at 50 Hz. The resulting design is a trade-off between high-power factor, efficiency and dimmer compatibility. Demo board specification.

SSL2103 demonstration board main indicators:



Figure 5. SSL2103 14 W A55 LED demonstration board appearance (top view)

Figure 6. SSL2103 14 W A55 LED Demo board outline (bottom view)

Figure 7. 14 W A55 LED demo board connection diagram

Figure 8. SSL2103 230 V (AC) 14 W A55 LED flyback circuit diagram

A55 14 W 230 V (AC) demo board bill of materials:


For details, please see:
http://www.nxp.com/documents/data_sheet/SSL2103.pdf
and
http://www.nxp.com/documents/user_manual/UM10507.pdf