SSL21082T
Mains dimmable LED driver IC
Rev. 6 — 3 October 2013
Product data sheet
1. General description
The SSL21082T is a high-voltage Integrated Circuit (IC) for driving retrofit LED lamps in
general lighting applications. It enables the implementation of a very compact low-cost
system solution. The IC has an integrated internal HV switch and works as Boundary
Conduction Mode (BCM) buck converter.
The SSL21082T is supplied by a start-up bleeder resistor, a dV/dt supply using capacitive
coupling from the drain or any other auxiliary supply. The IC supply current is low. An
internal clamp limits the supply voltage.
The IC has an accurate output current control and can be operated using Pulse-Width
Modulation (PWM) dimming. In addition, several protection features are available such as
easy external temperature feedback.
The main benefits of this IC include:
•
•
•
•
•
•
•
•
Small Printed-Circuit Board (PCB) footprint and compact solution
High efficiency (up to 90 %) for non-dimmable high power factor solutions
High power factor (>0.9)
Ease of integration and many protection features
Low electronic Bill Of Material (BOM)
Mains phase-cut dimmable using external components
Highly flexible IC for use in buck, buck/boost modes
Single inductor used for non-isolated configurations because of internal
demagnetization detection and dV/dt supply
The IC is designed to start up directly from the HV supply using an internal high-voltage
current source. An internal clamp limits the supply voltage.
NXP Semiconductors
SSL21082T
Mains dimmable LED driver IC
2. Features and benefits
LED driver IC for driving strings of LEDs or high-voltage LED modules from a rectified
mains supply
Power-efficient boundary conduction mode 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
Fast transient response through cycle-by-cycle current control:
No overshoot or undershoot 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)
Mains phase cut dimmable LED driver solution:
Supports both leading-edge and trailing-edge dimmers
Easy external temperature protection with a single NTC
Open output protection using external components
Compatible with wall switches with built-in indication light during standby
IC lifetime easily matches or surpasses LED lamp lifetime
Input current distributed evenly over the phase, reducing required output capacitor
size and bleeder dissipation
3. Applications
The SSL21082T is intended for mains dimmable compact LED lamps for single mains
input voltages. Mains input voltages include 100 V (AC) and 120 V (AC).
SSL21082T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
2 of 22
NXP Semiconductors
SSL21082T
Mains dimmable LED driver IC
4. Quick reference data
Table 1.
V
CC
R
DSon
I
DRAIN
V
DRAIN
f
conv
[1]
Quick reference data
Conditions
operating range
T
j
= 25
C
T
j
= 125
C
[1]
Symbol Parameter
supply voltage
drain-source
on-state resistance
current on pin
DRAIN
voltage on pin
DRAIN
conversion
frequency
Min
8
2.05
3.05
2
0.4
-
Typ
-
2.3
3.45
-
-
100
Max
16
2.55
3.85
+2
+300
-
Unit
V
A
V
kHz
An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum I
DD
value (see
Table 4).
5. Ordering information
Table 2.
Ordering information
Package
Name
SSL21082T
SO12
Description
Version
plastic small package outline body; 12 leads; body width SOT1196-1
3.9 mm
Type number
SSL21082T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
3 of 22
NXP Semiconductors
SSL21082T
Mains dimmable LED driver IC
6. Block diagram
HV
1
JFET
dV/dT
SUPPLY
9
DVDT
VCC
4
SUPPLY:
INTERNAL
REGULATOR
AND
BANDGAP
LOGIC
VALLEY
DETECTION
TOFFMAX
12
DRAIN
8
NTC
5
NTC
FUNCTION
THERMAL
SHUTDOWN
POR
1.5 V
TONMOD
TONMOD
LOGIC
CONTROL
AND
PROTECTION
BLANK
3
SOURCE
GND
2, 6, 7, 10, 11
0.5 V < >0.25 V
001aan694
Fig 1.
SSL21082T block diagram
SSL21082T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
4 of 22
NXP Semiconductors
SSL21082T
Mains dimmable LED driver IC
7. Pinning information
7.1 Pinning
HV
1
12 DRAIN
GND
SOURCE
VCC
NTC
GND
2
3
4
5
6
001aan703
11 GND
IC
10 GND
9
8
7
DVDT
TONMOD
GND
Fig 2.
SSL21082T pin configuration
7.2 Pin description
Table 3.
Symbol
HV
GND
SOURCE
VCC
NTC
TONMOD
DVDT
DRAIN
Pin description
Pin
1
2, 6,7, 10, 11
3
4
5
8
9
12
Description
high-voltage supply pin
ground
low-side external switch
supply voltage
temperature protection input
on-time modulation input
AC supply pin
high-side external switch
SSL21082T
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
5 of 22
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
