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SSL2109T Datasheet(PDF) 1 Page - NXP Semiconductors

Part No. SSL2109T
Description  GreenChip controller for LED lighting
Download  19 Pages
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

SSL2109T Datasheet(HTML) 1 Page - NXP Semiconductors

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General description
The SSL2109T is a high-voltage Integrated Circuit (IC), intended to drive LED lamps in
general lighting applications.
The main benefits of this IC include:
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.
Features and benefits
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)
GreenChip controller for LED lighting
Rev. 2 — 26 April 2012
Product data sheet

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