SSL4120 datasheet(6/48 Pages) NXP

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SSL4120

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Product data sheet

Rev. 2 — 1 November 2012

6 of 48

NXP Semiconductors

SSL4120

Resonant power supply controller IC with PFC for LED lighting

Functional description

7.1 Overview of IC modules

The functionality of the SSL4120 is grouped as follows:

• Supply module:

Supply management for the IC. Includes the restart and (latched) shut-down states

• Protection and restart timer:

An externally adjustable timer used for delayed protection and restart timing

• Enable input:

Control input for enabling and disabling the controllers. When disabled has very low

current consumption

• PFC controller:

Controls and protects the power factor converter. Generates a 400 V (DC) boost

voltage Vboost from the rectified AC mains input with a high PF

• HBC controller:

Controls and protects the resonant converter. generates a regulated, mains isolated

output voltage from the 400 V (DC) boost voltage Vboost

Figure 1 shows the block diagram of the SSL4120. A typical application is shown in

Figure 19.

SSL4120 Datasheet(PDF) 6 Page - NXP Semiconductors