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SSL21081 Datasheet

Compact non-dimmable LED driver

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SSL21081/SSL21083
Compact non-dimmable LED driver IC
Rev. 5 — 11 October 2012
Product data sheet
1. General description
The SSL21081/SSL21083 are a range of high-voltage Integrated Circuits (ICs) for driving
LED lamps in general mains non-dimmable lighting applications.
The main benefits of these products are:
Small Printed-Circuit Board (PCB) footprint, and compact solution
High efficiency (up to 95 %)
Ease of integration
Low electronic Bill Of Material (BOM)
These ICs incorporate a 300 V or 600 V MOSFET.
The ICs work as boundary conduction mode converters, typically in buck configuration.
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 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 ICs provide accurate output current control with LED current accuracy within 5 %.
The ICs can be operated using Pulse-Width Modulation (PWM) current regulation and has
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:
SSL21081AT/SSL21081T: drivers with integrated 300 V (DC) power switches
SSL21083AT/SSL21083T: drivers with integrated 600 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


NXP Semiconductors Electronic Components Datasheet

SSL21081 Datasheet

Compact non-dimmable LED driver

No Preview Available !

NXP Semiconductors
SSL21081/SSL21083
Compact non-dimmable LED driver IC
No over or undershoots in the LED current
No binning on LED forward voltage required
Internal Protections:
UnderVoltage LockOut (UVLO)
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Short-Winding Protection (SWP) SSL21081T/SSL21083T only
Internal OverTemperature Protection (OTP)
Brownout protection
Output Short Protection (OSP)
Low component count (see Figure 3) LED driver solution:
No Schottky diode required due to ZCS
No dim switch and high-side driver required for PWM current regulation
Easy external temperature protection with a single NTC resistor
Option for soft-start function
Compatible with wall switches with built-in indication light during standby1
IC lifetime easily matches or surpasses LED lamp lifetime
3. Applications
SSL21081/SSL21083 products are intended for compact mains non-dimmable LED
lighting applications with accurate fixed current output for single mains input voltages.
Mains input voltages include 100 V (AC), 120 V (AC) and 230 V (AC). The output signal
can be modulated using a PWM signal.
1. The Hotaru switch is a well known wall switch with built-in light
SSL21081_SSL21083
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
2 of 22


Part Number SSL21081
Description Compact non-dimmable LED driver
Maker NXP
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SSL21081 Datasheet PDF






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