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SSL2109T Datasheet

Compact non-dimmable LED driver

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SSL2109T
Compact non-dimmable LED driver IC
Rev. 5 — 3 October 2013
Product data sheet
1. General description
The SSL2109T is a high-voltage Integrated Circuit (IC) for driving 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 %) for non-dimmable high power factor solutions
High power factor >0.9 (application dependent)
Ease of integration and many protection features
Low electronic Bill Of Material (BOM)
Highly flexible IC for use in buck, buck/boost and flyback modes
Single inductor used for non-isolated configurations because of internal
demagnetization detection and dV/dt supply
The IC is supplementary to the SSL21081/SSL21083 series but without an internal switch.
The IC 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) current regulation and has
many protection features including easy LED temperature feedback.
2. Features and benefits
LED driver IC for driving strings of LEDs or high-voltage LED modules from a rectified
mains supply
Part of a high-efficiency switch mode flyback or buck product family.
Driver-only which can drive an external MOSFET
Driver 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
Suitable for high power factor (>0.9) applications
Applicable in buck, buck/boost and flyback topologies


NXP Semiconductors Electronic Components Datasheet

SSL2109T Datasheet

Compact non-dimmable LED driver

No Preview Available !

NXP Semiconductors
SSL2109T
Compact non-dimmable LED driver IC
Direct PWM current regulation possible
Fast transient response through cycle-by-cycle current control:
Negligible AC mains ripple in LED current and minimal total capacitance in low
ripple configurations
No over or undershoots in the LED current
Simple high input power factor solution (>0.9)
Internal protection features:
UnderVoltage LockOut (UVLO)
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Short-Winding Protection (SWP)
Internal OverTemperature Protection (OTP)
Brownout protection
Output Short Protection (OSP)
Low component count LED driver solution (see Figure 3):
Easy external temperature protection with a single NTC
Option for soft-start function
Compatible with wall switches with built-in indication light during standby
IC lifetime easily matches or surpasses LED lamp lifetime
3. Applications
The SSL2109T is intended for compact LED lamps with accurate fixed current output for
single mains input voltages. Mains input voltages include 100 V, 120 V and 230 V (AC).
The output signal can be modulated using a PWM signal. External components determine
the power range.
4. Quick reference data
Table 1.
Symbol
VCC
ICC(INT)
VHV
VDRAIN
Quick reference data
Parameter
supply voltage
internal supply current
voltage on pin HV
voltage on pin DRAIN
Conditions
Min
operating range [1] 8
normal operation -
0.4
0.4
Typ
-
1.3
-
-
Max
16
-
+600
+600
Unit
V
mA
V
V
fconv
Vo(DRIVER)max
conversion frequency
maximum output voltage
on pin DRIVER
VCC > VCC(startup)
-
9
100 -
10.5 12
kHz
V
[1] An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum IDD
value (see Table 4)
SSL2109T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 3 October 2013
© NXP B.V. 2013. All rights reserved.
2 of 20


Part Number SSL2109T
Description Compact non-dimmable LED driver
Maker NXP
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SSL2109T Datasheet PDF






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