SSL21081T
Compact non-dimmable LED driver IC
Rev. 6 — 3 October 2013
Product data sheet
1. General description
The SSL21081T 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 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:
driver 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
NXP Semiconductors
SSL21081T
Compact non-dimmable LED driver IC
Internal protections:
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):
No Schottky diode required due to ZCS
Easy external temperature protection with a single NTC resistor
Option for soft-start function
Compatible with wall switches with built-in indication light during standby
1
IC lifetime easily matches or surpasses LED lamp lifetime
3. Applications
SSL21081T 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). The output signal can be modulated using a
PWM signal.
1.
The Hotaru switch is a well-known wall switch with built-in light
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
SSL21081T
Product data sheet
Rev. 6 — 3 October 2013
2 of 22
NXP Semiconductors
SSL21081T
Compact non-dimmable LED driver IC
4. Quick reference data
Table 1.
Symbol
V
CC
R
DSon
f
conv
I
DRAIN
V
DRAIN
[1]
Quick reference data
Parameter
supply voltage
drain-source on-state
resistance
conversion frequency
current on pin DRAIN
voltage on pin DRAIN
Conditions
operating range
T
j
= 25
C
T
j
= 125
C
[1]
Min
8
2.05
3.05
-
2
0.4
Typ
-
2.3
100
-
-
Max
16
2.55
-
+2
+300
Unit
V
kHz
A
V
3.45 3.85
An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum IDD
value (see
Table 5).
5. Ordering information
Table 2.
Ordering information
Package
Name
SSL21081T
SO8
Description
plastic small package outline body; 8 leads; body width
3.9 mm
Version
SOT96-1
Type number
5.1 Ordering options
Remark:
All voltages are in V (AC) unless otherwise specified.
Table 3.
Type
SSL21081T
Ordering options
Input voltage
100 V; 120 V
Internal MOSFET
characteristics
300 V (DC); 2.3
Package
SO8
SSL21081T
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
SSL21081T
Compact non-dimmable LED driver IC
6. Block diagram
Fig 1.
SSL21081T block diagram
SSL21081T
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
SSL21081T
Compact non-dimmable LED driver IC
7. Pinning information
7.1 Pinning
Fig 2.
SSL21081T pin configuration (SO8)
7.2 Pin description
Table 4.
Symbol
HV
SOURCE
VCC
NTC
DVDT
GND
DRAIN
Pin description
Pin (SO8)
1
2
3
4
5
6, 7
8
Description
high-voltage supply pin
low-side internal switch
supply voltage
LED temperature protection input
AC supply pin
ground
high-side internal switch
SSL21081T
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
EEWORLD
