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PDF SSL21153T Data sheet ( Hoja de datos )
| Número de pieza | SSL21153T | |
| Descripción | Low-cost non-dimmable LED driver IC | |
| Fabricantes | NXP Semiconductors | |
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SSL2115X
Low-cost non-dimmable LED driver IC
Rev. 2 — 7 June 2012
Product data sheet
1. General description
The SSL2115X is a low-cost non-dimmable LED driver IC. It is designed to drive LEDs in
isolated flyback or non-isolated buck-boost topologies. The device includes a high-voltage
power switch and a circuit enabling start-up directly from the rectified mains voltage. It has
a good controlled output current.
2. Features and benefits
Compact solution with a small form factor and a low component count
Ease of integration
Primary side sensing (no optocoupler required)
True current source behavior:
LED current independent of mains voltage, LED voltage and temperature variation
LED current accuracy (10 %)
Line regulation: 3 % at 230 V 10 %
Load regulation: 3 % between 0.5 Umax and 0.85 Umax
Efficiency up to 86 % depending on the application
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Power Factor 0.6 or ~0.9 using valley fill
Low ripple current < 1 %
Internal protections:
OverTemperature Protection (OTP)
LED short protection (IOUT (0 V – V maximum) at a constant level)
LED open protection
UnderVoltage LockOut (UVLO)
Internal supply voltage generation enabling start-up from the rectified mains voltage
SO7 package
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
NXP Semiconductors
SSL2115X
Low-cost non-dimmable LED driver IC
Where
• Vref(high)pk is the peak high reference voltage
• RSOURCE is the value of the resistor connected to the SOURCE pin
8.3 Leading-Edge Blanking (LEB)
The controller has a fixed LEB of 325 ns to avoid wrong detection of the primary peak
current.
8.4 dV/dt detection
The end of demagnetization is detected when the voltage on the sense pin is <50 mV.
8.5 Turn-off-time (toff)
A blanking time is applied at the beginning of toff during tblank time to observe the
demagnetization.
8.6 Supply concepts VCC and UnderVoltage LockOut (UVLO)
An integrated Junction gate Field-Effect Transistor (JFET), connected to the drain voltage,
provides the start-up current.
The IC starts switching when the voltage on pin VCC exceeds the VCC(startup) level. After
start-up, an external supply is required, which an auxiliary winding connection can
provide.
When
the
voltage
on
pin
VCC
www.DataSheet.net/
drops
below
the
VCC(UVLO)
level,
the
IC
stops
switching and is reset.
Design the voltage of the auxiliary winding to ensure that the VCC supply voltage has a
Umax value of 29 V
8.7 Peak current detection
The cycle-by-cycle peak drain current limit circuit uses the external source resistor
RSOURCE to measure the primary peak current. The circuit is activated after the leading
edge blanking time. The protection circuit limits the source voltage over resistor RSOURCE
to Vth(det)SOURCE, thus limiting the primary peak current.
8.8 LED OverTemperature Protection (OTP)
An external temperature dependent resistor can be applied for LED over temperature
protection.
8.9 LED Output Short-circuit Protection (OSP)
When the output short-circuit protection is activated, the IC enters shutdown mode. Only a
power-on reset (switching off the mains voltage) activates normal operation.
8.10 Output LED open-circuit protection
If an open circuit occurs on the LEDs, the output voltage increases at each cycle of the
AC/DC converter. Energy is no longer transferred to the LEDs. The energy accumulated
at the primary side is transferred to the supply of the IC via the auxiliary winding. The IC
SSL2115X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 7 June 2012
© NXP B.V. 2012. All rights reserved.
5 of 15
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
NXP Semiconductors
SSL2115X
Low-cost non-dimmable LED driver IC
14. Abbreviations
Table 7. Abbreviations
Acronym
Description
BCM
Boundary Conduction Mode
BOM
Bill Of Materials
JFET
Junction Field-Effect Transistor
LEB Leading-Edge Blanking
LED Light Emitting Diode
MOSFET
Metal-Oxide Semiconductor Field-Effect Transistor
OCP
OverCurrent Protection
OSP
Output Short Protection
OTP
OverTemperature Protection
PCB
Printed-Circuit Board
PWM
Pulse-Width Modulation
SMPS
Switched Mode Power Supply
UVLO
UnderVoltage LockOut
ZCS Zero-Current Switching
www.DataSheet.net/
SSL2115X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 7 June 2012
© NXP B.V. 2012. All rights reserved.
11 of 15
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet SSL21153T.PDF ] | |
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