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PDF SSL21101T Data sheet ( Hoja de datos )
| Número de pieza | SSL21101T | |
| Descripción | GreenChip driver | |
| Fabricantes | NXP Semiconductors | |
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SSL21101T
GreenChip driver for LED lighting
Rev. 3 — 7 June 2012
Product data sheet
1. General description
The SSL21101T is a Switch Mode Power Supply (SMPS) driver IC. It is designed to drive
LED devices typically in flyback configurations. The device includes a high-voltage power
switch and a circuit enabling start-up directly from the rectified mains voltage. It has
accurate control of the output current.
2. Features and benefits
Small Printed-Circuit Board (PCB) footprint and compact solution with a small form
factor
Ease of integration
Low component count (complete application with about 25 components)
AC/DC offline non-dimmable LED driver from 100 V (AC) to 230 V (AC)
Primary side sensing (no optocoupler required)
True current source behavior:
LED current independent of mains voltage, LED voltage, temperature and coil
variation
High LED current accuracy (3 %)
Efficiency up to 90 % depending on the application
Smart Digital Control (SDC) to deal with all kind of applications:
High-Power Factor (PF; > 0.95) and low Total Harmonic Distortion Mode (THD
down to 20 %)
Small form factor (low LED current mode ripple with small electrolytic capacitors) -
compatible with exception clause IEC61000-3-2
Internal protections:
Short-winding protection
Internal OverTemperature Protection (OTP)
LED short protection
LED open protection
UnderVoltage LockOut (UVLO)
External temperature protection with built-in Negative Temperature Coefficient (NTC)
Internal supply voltage generation enabling start-up from the rectified mains voltage
Compatible with wall switches with built-in indication light during standby
SO14 package
1 page  
NXP Semiconductors
SSL21101T
GreenChip driver for LED lighting
VDRAIN
VM
Vi + NVout
Vi
δ1tsw
primary
stroke
switching
time
δ2tsw
secondary
stroke
switching
time
tsw
Fig 3.
1 + 2 +3 = 1
VDRAIN: voltage on pin DRAIN
1tsw: primary stroke switching time
2tsw: secondary stroke switching time
3tsw: free running time
tsw: switching time
VM: peak voltage
Vi: input voltage
N: transformer turn ratio
Vout: output voltage
Timing
δ3tsw
free running
aaa-001586
8.1 True current source behavior
The LED current (ILED) of a flyback converter can be calculated with Equation 1:
ILED
=
1--
2
N
IM
----2---t--s--w--
tsw
(1)
Where:
• N is the turn ratio of the transformer
• IM is the peak current
• 2tsw is the secondary stroke switching time
• tsw is the switching period
The relationship between the LED current and pin ILEDREF can be calculated with
Equation 2:
ILED
=
-----0---.-4---5---------N-----------V----I---I--L---E---D----R---E---F-------
VDDINTREGD RSOURCE
(2)
SSL21101T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 7 June 2012
© NXP B.V. 2012. All rights reserved.
5 of 22
5 Page 
NXP Semiconductors
SSL21101T
GreenChip driver for LED lighting
9. Limiting values
Table 7. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
General
Ptot
Tstg
Tj
VESD
total power dissipation
storage temperature
junction temperature
electrostatic discharge voltage Human Body Model
(HBM)
pins DRAIN and VCC
all other pins
Charged Device Model
(CDM)
Voltages
VCC
VDD(INTREGD)
supply voltage
internal regulated supply
voltage
continuous
VRMAIN
VSOURCE
VDRAIN
VILEDREF
VMODE
VNTC
Currents
voltage on pin RMAIN
voltage on pin SOURCE
voltage on pin DRAIN
voltage on pin ILEDREF
voltage on pin MODE
voltage on pin NTC
IM(SOURCE)
IM(DRAIN)
IM(RMAIN)
peak current on pin SOURCE
peak current on pin DRAIN
peak current on pin RMAIN
Min
-
55
40
[1]
1000
2000
500
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
1.2
0
0
[1] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
10. Thermal characteristics
Max
0.8
+150
+150
+1000
+2000
+500
+40
+5.5
+1.7
+5.5
+700
+5.5
+5.5
+5.5
0
1.2
450
Table 8.
Symbol
Rth(j-a)
Thermal characteristics
Parameter
Conditions
thermal resistance from junction to in free air; SO14 package; PCB: 906 mm2;
ambient
2-layer; 35 m Cu/layer
Typ
70
[1] Rth(j-a) can be lower when the GND pins are connected to an area with sufficient copper on the printed-circuit board.
Unit
W
C
C
V
V
V
V
V
V
V
V
V
V
V
A
A
A
Unit
K/W
SSL21101T
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 7 June 2012
© NXP B.V. 2012. All rights reserved.
11 of 22
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| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet SSL21101T.PDF ] | |
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