Compact non-dimmable LED driver - Silergy
Description
SSL21081AT
Compact non-dimmable LED driver IC
Rev.
6 — 3 October 2013
Product data sheet
1.
General description
The SSL21081AT is a high-voltage Integrated Circuit (IC) for driving LED lamps in general mains non-dimmable lighting applications.
The main benefits are:
• Small Printed-Circuit Board (PCB) footprint; compact solution • High efficiency (up to 95 %) • Ease of integration • Low electronic Bill Of Material (BOM)
The IC incorporates a 300 V MOSFET.
The IC works as boundary conduction mode converters, typically in buck configuration.
It 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 function provides full flexibility in the application design.
The IC consumes 1.
3 mA of supply current with an internal clamp limiting the supply voltage.
The IC provides accurate output current control with LED current accuracy within 5 %.
It can be operated using Pulse-Width Modulation (PWM) current regulation.
It includes many protection features including easy LED temperature feedback.
2.
Features and benefits
LED driver ICs for driving LED strings from a rectified mains supply High-efficiency switch mode buck driver product family:
drivers with integrated 300 V (DC) power switches Controller with power-efficient boundary conduction mode of operation with:
No reverse recovery losses in freewheel diode Zero Current Switching (ZCS) for turn-on of switch Zero voltage or valley switching for turn-on of switch Minimal required inductance value and size Direct PWM current regulation possible Fast transient response through cycle-by-cycle current control: Negligible AC mains ripple at LED current and minimal total capacitor value No over or undershoots in the LED current
Silergy Corp.
SSL21081AT
Compact non-dimmable LED driver IC
Internal protections: UnderVoltage LockOut (UVLO) Leadin...
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