SSL2109 series
GreenChip controller for LED lighting
Rev. 3 — 4 June 2012
Product data sheet
1. General description
The SSL2109 series is a range of high-voltage Integrated Circuits (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 %)
Ease of integration and many protection features
Low electronic Bill Of Material (BOM)
The IC is supplementary to the SSL2108 series but without an 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.
2. 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)
NXP Semiconductors
SSL2109 series
GreenChip controller for LED lighting
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Short-Winding Protection (SWP); SSL2109T only
Internal OverTemperature Protection (OTP)
Brownout protection
Output Short Protection (OSP)
Low component count (see
Figure 4)
LED driver solution:
No dim switch and high-side driver required for PWM dimming
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 SSL2109 series 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. The power range is
determined by external components.
4. Quick reference data
Table 1.
Symbol
V
CC
I
CC(INT)
V
HV
V
DRAIN
f
conv
Quick reference data
Parameter
supply voltage
internal supply current
voltage on pin HV
voltage on pin DRAIN
conversion frequency
VCC > V
CC(startup)
Conditions
operating range
normal operation
Min
8
-
-
−0.4
-
9
Typ
-
1.3
-
-
-
10.5
Max
14
-
600
600
200
12
Unit
V
mA
V
V
kHz
V
V
o(DRIVER)max
maximum output voltage
on pin DRIVER
5. Ordering information
Table 2.
Ordering information
Package
Name
SSL2109AT
SSL2109T
SO8
Description
plastic small package outline body; 8 leads; body width
3.9 mm
Version
SOT96-1
Type number
SSL2109_SER
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 3 — 4 June 2012
2 of 20
NXP Semiconductors
SSL2109 series
GreenChip controller for LED lighting
7. Pinning information
7.1 Pinning
HV
VCC
NTC
SOURCE
1
2
8
7
DRAIN
GND
DVDT
DRIVER
SSL2109
3
4
aaa-001742
6
5
Fig 3.
Pin configuration
7.2 Pin description
Table 3.
Symbol
HV
VCC
NTC
SOURCE
DRIVER
DVDT
GND
DRAIN
Pin description
Pin
1
2
3
4
5
6
7
8
Description
high-voltage supply pin
supply voltage
temperature protection input
low-side external switch
driver output
AC supply pin
ground
high-side external switch
SSL2109_SER
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 3 — 4 June 2012
5 of 20
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