SSL21081/SSL21083
Compact non-dimmable LED driver IC
Rev. 5 — 11 October 2012
Product data sheet
1. General description
The SSL21081/SSL21083 are a range of high-voltage Integrated Circuits (ICs) for driving
LED lamps in general mains non-dimmable lighting applications.
The main benefits of these products are:
•
•
•
•
Small Printed-Circuit Board (PCB) footprint, and compact solution
High efficiency (up to 95 %)
Ease of integration
Low electronic Bill Of Material (BOM)
These ICs incorporate a 300 V or 600 V MOSFET.
The ICs work as boundary conduction mode converters, typically in buck configuration.
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 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 ICs provide accurate output current control with LED current accuracy within 5 %.
The ICs can be operated using Pulse-Width Modulation (PWM) current regulation and 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:
SSL21081AT/SSL21081T: drivers with integrated 300 V (DC) power switches
SSL21083AT/SSL21083T: drivers with integrated 600 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
SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
No over or undershoots in the LED current
No binning on LED forward voltage required
Internal Protections:
UnderVoltage LockOut (UVLO)
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Short-Winding Protection (SWP) SSL21081T/SSL21083T only
Internal OverTemperature Protection (OTP)
Brownout protection
Output Short Protection (OSP)
Low component count (see Figure 3) LED driver solution:
No Schottky diode required due to ZCS
No dim switch and high-side driver required for PWM current regulation
Easy external temperature protection with a single NTC resistor
Option for soft-start function
Compatible with wall switches with built-in indication light during standby1
IC lifetime easily matches or surpasses LED lamp lifetime
3. Applications
SSL21081/SSL21083 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) and 230 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
SSL21081_SSL21083
Product data sheet
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SSL21081/SSL21083
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Compact non-dimmable LED driver IC
4. Quick reference data
Table 1.
Symbol
Quick reference data
Parameter
Conditions
[1]
Min
Typ
Max
Unit
8
-
14
V
VCC
supply voltage
operating range
RDSon
drain-source on-state
resistance
SSL21083T/SSL21083AT;
Tj = 25 C
4
5
6
SSL21083T/SSL21083AT;
Tj = 125 C
6
7.5
9
SSL21081T/SSL21081AT;
Tj = 25 C
2.05
2.3
2.55
SSL21081T/SSL21081AT;
Tj = 125 C
3.05
3.45 3.85
-
100
-
kHz
SSL21083T/SSL21083AT
1
-
1
A
SSL21081T/SSL21081AT
2
-
2
A
SSL21083T/SSL21083AT
0.4
-
600
V
SSL21081T/SSL21081AT
0.4
-
300
V
fconv
conversion frequency
IDRAIN
current on pin DRAIN
VDRAIN
[1]
voltage on pin DRAIN
The maximum operating voltage at VCC can exceed 14 V when determined by the IC using the dV/Dt
supply.
5. Ordering information
Table 2.
Ordering information
Type number
SSL21081T
SSL21083T
Package
Name
Description
Version
SO8
plastic small package outline body; 8 leads; body width
3.9 mm
SOT96-1
SSL21081AT
SSL21083AT
SSL21081_SSL21083
Product data sheet
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
5.1 Ordering options
Remark: All voltages are in V (AC) unless otherwise specified.
Table 3.
Ordering options
Type
Input voltage
Internal MOSFET Package
characteristics
Short-winding
protection
SSL21081T
100 V; 120 V
300 V (DC); 2
yes
SO8
SSL21081AT
SSL21083T
no
100 V; 120 V; 230 V
600 V (DC); 5
SO8
yes
SSL21083AT
no
6. Block diagram
HV
VCC
1
3
JFET
SUPPLY:
INTERNAL
REGULATOR
AND
BANDGAP
dV/dt
SUPPLY
5
VALLEY
DETECTION
8
DVDT
DRAIN
LOGIC
TOFFMAX
NTC
4
NTC
FUNCTION
THERMAL
SHUTDOWN
TONMAX
LOGIC
CONTROL
AND
PROTECTION
BLANK
2
SOURCE
POR
1.5 V
GND
6, 7
0.5 V < >0.25 V
aaa-005191
Fig 1.
SSL21081_SSL21083
Product data sheet
SSL21081/SSL21083 block diagram
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
7. Pinning information
7.1 Pinning
HV
1
SOURCE
2
8
DRAIN
7
GND
IC
VCC
3
6
GND
NTC
4
5
DVDT
001aan702
Fig 2.
SSL21081/SSL21083 pin configuration (SO8)
7.2 Pin description
Table 4.
SSL21081_SSL21083
Product data sheet
Pin description
Symbol
Pin (SO8)
Description
HV
1
high-voltage supply pin
SOURCE
2
low-side internal switch
VCC
3
supply voltage
NTC
4
LED temperature protection input
DVDT
5
AC supply pin
GND
6, 7
ground
DRAIN
8
high-side internal switch
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
8. Functional description
8.1 Converter operation
The converter in the SSL21081/SSL21083 is a Boundary Conduction Mode (BCM), peak
current controlled system. For the basic application diagram see Figure 3, for the
waveforms see Figure 4. This converter type operates at the boundary between
continuous and discontinuous mode. Energy is stored in inductor L each period that the
switch is on. The inductor current IL is zero when the internal MOSFET switch is switched
on. Thereafter, the amplitude of the current build-up in L is proportional to VIN VOUT and
the time that the internal MOSFET switch is on. When the internal MOSFET switch is
switched off, the current continues to flow through the freewheel diode and the output
capacitor. The current then falls at a rate proportional to the value of VOUT. The LED
current ILED is almost equal to half the peak switch current. A new cycle is started, as soon
as the inductor current IL is zero.
Rinrush
Vsec
LEDs
L
DVDT
HV
VCC
DRAIN
8
5
1
IC
3
6, 7
GND
4
NTC
NTC
2
SOURCE
Rsense
001aan693
Fig 3.
Basic SSL21081/SSL21083 application diagram
8.2 Valley detection
A new cycle is started when the primary switch is switched on (see Figure 4). Following
time t1, when the peak current is detected on the SOURCE pin, the switch is turned off
and the secondary stroke starts (3). When the secondary stroke is complete and the coil
current at t3 equals zero, the drain voltage starts to oscillate around the VIN VOUT level.
The amplitude equals VOUT. A special feature, called valley detection is an integrated part
of the SSL21081/SSL21083 circuitry. Dedicated built-in circuitry connected to the DRAIN
pin, senses when the voltage on the drain of the switch has reached its lowest value. The
next cycle is then started and as a result the capacitive switching losses are reduced.
A valley is detected and accepted if both the frequency of the oscillations and the voltage
swing are within the range specified (fring and ∆Vvrec(min)) for detection. If a valid valley is
not detected, the secondary stroke is continued until the maximum off-time (toff(high)) is
reached, then the next cycle is started.
SSL21081_SSL21083
Product data sheet
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SSL21081/SSL21083
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Compact non-dimmable LED driver IC
VGATE
internal MOSFET switch
VOUT
VD
VIN
valley
0
demagnetization
magnetization
IL
0
2
1
t0
t1
3
t2
4
t3
t00
T
001aan699
Fig 4.
Buck waveforms and valley detection
8.3 Protective features
The IC has the following protective features:
•
•
•
•
•
•
•
•
UnderVoltage LockOut (UVLO)
Leading-Edge Blanking (LEB)
OverCurrent Protection (OCP)
Internal OverTemperature Protection (OTP)
Brownout protection
Short-Winding Protection (SWP) SSL21081T/SSL21083T only
Output Short Protection (OSP)
LED overtemperature control and protection
The SWP and the OSP are latched protections. These protections cause the IC to halt
until a reset (a result of power cycling) is executed. When VCC drops lower than VCC(rst),
the IC resets the latch protection mode. The internal OTP and LED over temperature
protections are safe-restart protections. The IC halts, causing VCC to fall lower than
VCC(stop), and instigates start-up. When VCC drops lower than VCC(rst), the IC resets the
latch protection mode. Switching starts only when no fault condition exists.
8.3.1 UnderVoltage LockOut (UVLO)
When the voltage on the VCC pin drops lower than VCC(stop), the IC stops switching. An
attempt is then made to restart by supplying VCC from the HV pin voltage.
SSL21081_SSL21083
Product data sheet
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
8.3.2 Leading-Edge Blanking (LEB)
To prevent false detection of the short-winding or overcurrent, a blanking time following
switch-on is implemented. When the internal MOSFET switch turns on there can be a
short current spike due to capacitive discharge of voltage over the drain and source.
During the LEB time (tleb), the spike is disregarded.
8.3.3 OverCurrent Protection (OCP)
The SSL21081/SSL21083 contain a highly accurate built-in peak current detector. It
triggers when the voltage at the SOURCE pin reaches the peak-level Vth(ocp)SOURCE. The
current through the switch is sensed using a resistor connected to the SOURCE pin. The
sense circuit is activated following LEB time tleb. As the LED current is half the peak
current (by design), it automatically provides protection for maximum LED current during
operation. There is a propagation delay between overcurrent detection and the actual
closure of the switch td(ocp-swoff). Due to the delay, the actual peak current is slightly higher
than the OCP level set by the resistor in series to the SOURCE pin.
8.3.4 OverTemperature Protection (OTP)
When the internal OTP function is triggered at a certain IC temperature (Tth(act)otp), the
converter stops operating. The safe-restart protection is triggered and the IC restarts
again with switching resuming when the IC temperature drops lower than Tth(rel)otp.
8.3.5 Brownout protection
Brownout protection is designed to limit the lamp power when the input voltage drops
close to the output voltage level. Since the input power has to remain constant, the input
current would otherwise increase to a level that is too large for the input circuitry. For the
SSL21081/SSL21083, there is a maximum limit on the on-time ton(high). The rate of current
rise in the coil during the on-phase is proportional to the difference between input voltage
and output voltage. Therefore, the peak current cannot be reached before ton(high) and as
a result the average output current to the LEDs is reduced.
8.3.6 Short-Winding Protection (SWP) SSL21081T/SSL21083T only
SWP activates if there is a steep rising current through the MOSFET and thus through the
external resistor connected to the SOURCE pin. This current can occur when there is a
short from the freewheel diode. Additionally, it occurs due to a small/shorted inductor
between the input voltage and the DRAIN pin. If the voltage on the SOURCE pin is greater
than 1.5 V, latched protection is triggered following LEB time tleb. In addition, if VCC drops
lower than VCC(rst) the IC resets the latched protection mode.
8.3.7 Output Short Protection (OSP)
During the second stroke (switch-of time), if a valley is not detected within the off-time limit
(toff(high)), then typically the output voltage is less than the minimum limit allowed in the
application. This condition can occur either during starting up or due to a short. A timer is
started when toff(high) is detected, and is stopped only if a valid valley-detection occurs in
one of the subsequent cycles.
If a valley is not detected for tdet(sc), it is concluded that a real short-circuit exists and not
start-up. The IC enters latched protection. If VCC drops lower than VCC(rst), the IC resets
the latched protection mode. During PWM current regulation, the OSP timer is paused
during the off-cycle of the PWM signal.
SSL21081_SSL21083
Product data sheet
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
8.4 VCC supply
The SSL21081/SSL21083 are supplied using three methods:
• Under normal operation, the voltage swing on the DVDT pin is rectified within the IC
providing current towards the VCC pin
• At start-up, there is an internal current source connected to the HV pin. The current
source provides internal power until either the dV/dt supply or an external current on
the VCC pin provides the supply
• An external voltage source can be connected to the VCC pin
The IC starts up when the voltage at the VCC pin is higher than VCC(startup). The IC locks
out (stops switching) when the voltage at the VCC pin is lower than VCC(stop). The
hysteresis between the start and stop levels allows the IC to be supplied by a buffer
capacitor until the dV/dt supply is settled. The SSL21081/SSL21083 has an internal VCC
clamp, which is an internal active Zener (or shunt regulator). This internal active Zener
limits the voltage on the supply VCC pin to the maximum value of VCC. If the maximum
current of the dV/dt supply minus the current consumption of the IC (determined by the
load on the gate drivers), is lower than the maximum value of IDD no external Zener diode
is needed in the dV/dt supply circuit.
8.5 DVDT pin supply (dV/dt)
The DVDT pin is connected to an internal single-sided rectification stage. When an
alternating voltage with sufficient amplitude is supplied to the pin, the IC can be powered
without any other external power connection. This solution provides an effective method
to prevent the additional high-power losses, which would result if a regulator were used for
continuously powering the IC. Unlike an auxiliary supply, additional inductor windings are
not needed.
8.6 VCC regulator
During supply dips, the input voltage can drop too low to supply the required IC current
through the DVDT pin. Under these conditions, if the VCC voltage drops lower than
VCC(swon)reg level, another regulator with a current capability of up to Isup(high)HV is started.
The job of the regulator is to fill in the required supply current, which the dV/dt supply does
not deliver, thus preventing the IC going into UVLO. When the VCC voltage is higher than
VCC(swon)reg level, the regulator is turned off.
8.7 NTC function and PWM current regulation
The NTC pin can be used as a control method for LED thermal protection. Alternatively,
the pin can be used as an input to disable/enable light output using a digital signal (PWM
current regulation). The pin has an internal current source that generates the current of
Ioffset(NTC). An NTC resistor to monitor the LED temperature can be directly connected to
the NTC pin. Depending on the resistance value and the corresponding voltage on the
NTC pin, the converter reacts as shown in Figure 5.
SSL21081_SSL21083
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
Peak current
Fig 5.
1
2
3
4
Vth(high)NTC
Vth(ocp)SOURCE = 250 mV
Vth(low)NTC
Ipk / 2
Vact(tmr)NTC
Vth(ocp)SOURCE = 500 mV
Vdeact(tmr)NTC
Ipk
5
VNTC
001aan700
NTC control curve
When the voltage on the NTC pin is higher than Vth(high)NTC see Figure 5 (4), the converter
delivers nominal output current. When the voltage is lower than this level, the peak current
is gradually reduced until Vth(low)NTC is reached, see Figure 5 (3). The peak current is now
half the peak current of nominal operation. When Vact(tmr)NTC is passed, see Figure 5 (2) a
timer starts to run to distinguish between the following situations:
• If the low-level Vdeact(tmr)NTC is not reached within time tto(deact)NTC, Figure 5 (1) LED
overtemperature is detected. The IC stops switching and attempts to restart from the
HV pin voltage. Restart takes place when the voltage on NTC pin is higher than
Vth(high)NTC, see Figure 5 (4). It is assumed that the reduction in peak current did not
result in a lower NTC temperature and LED OTP is activated.
• If the low-level Vdeact(tmr)NTC is reached within the time tto(deact)NTC, Figure 5 (1) it is
assumed that the pin is pulled down externally. The restart function is not triggered.
Instead, the output current is reduced to zero. PWM current regulation can be
implemented this way. The output current rises again when the voltage is higher than
Vdeact(tmr)NTC.
8.7.1 Soft-start function
The NTC pin can be used to make a soft start function. During switch-on, the level on the
NTC pin is low. By connecting a capacitor (in parallel with the NTC resistor), a time
constant can be defined. The time constant causes the level on the NTC pin to increase
slowly. When passing level Vth(low)NTC Figure 5 (3), the convertor starts with half of the
maximum current. The output current slowly increases to maximum when Vth(high)NTC
Figure 5 (4) is reached.
SSL21081_SSL21083
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Compact non-dimmable LED driver IC
8.8 Heat sink
The copper of the PCB acts as the heat sink for SSL21081/SSL21083 applications.
Equation 1 shows the relation between the maximum allowable power dissipation P and
the thermal resistance from junction to ambient.
R th j – a = T j max – T amb P
(1)
Where:
Rth(j-a) = thermal resistance from junction to ambient
Tj(max) = maximum junction temperature
Tamb = ambient temperature
P = power dissipation
SSL21081_SSL21083
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Compact non-dimmable LED driver IC
9. Limiting values
Table 5.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
General
SR
slew rate
on pin DRAIN
5
+5
V/ns
Ptot
total power dissipation
SO8 package
-
0.6
W
Tamb
ambient temperature
40
+125
C
Tj
junction temperature
40
+150
C
Tstg
storage temperature
55
+150
C
0.4
+14
V
0.4
+600
V
Voltages
[1]
VCC
supply voltage
continuous
VDRAIN
voltage on pin DRAIN
600 V (DC) version
300 V (DC) version
0.4
+300
V
VHV
voltage on pin HV
current limited
0.4
+600
V
VSOURCE
voltage on pin SOURCE
current limited
0.4
+5.2
V
VNTC
voltage on pin NTC
current limited
0.4
+5.2
V
IDD
supply current
at pin VCC
-
20
mA
IDRAIN
current on pin DRAIN
600 V (DC) version
1
+1
A
300 V (DC) version
2
+2
A
600 V (DC) version
1
+1
A
300 V (DC) version
2
+2
A
-
1.3
A
2
+2
kV
1
+1
kV
500
+500
V
Currents
ISOURCE
current on pin SOURCE
IDVDT
current on pin DVDT
duration 20 s
maximum
VESD
electrostatic discharge
voltage
human body model;
(for all pins except
DRAIN and HV)
[1]
[2]
human body model
for DRAIN and HV
charged device
SSL21081_SSL21083
Product data sheet
[3]
[1]
An internal clamp sets the supply voltage and current limits.
[2]
Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
[3]
Charged device model: equivalent to charging the IC up to 1 kV and the subsequent discharging of each
pin down to 0 V over a 1 resistor.
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Compact non-dimmable LED driver IC
10. Thermal characteristics
Table 6.
Thermal characteristics
Symbol Parameter
Conditions
Typ
Unit
142
K/W
Rth(j-a)
thermal resistance from junction to ambient
in free air; SO8 package, PCB: 2 cm 3 cm,
2-layer, 35 m Cu per layer
in free air; SO8 package; PCB: JEDEC 2s2p
72
K/W
j-top
thermal resistance from junction to top
top package temperature measured at the
warmest point on top of the case; SO8 package
3.4
K/W
11. Characteristics
Table 7.
Characteristics
Symbol
Parameter
fconv
conversion frequency
Conditions
Min
Typ
Max
Unit
-
100
-
kHz
VDRAIN = 600 V (DC)
-
-
10
A
VDRAIN = 300 V (DC)
-
-
10
A
VHV = 600 V (DC)
-
-
30
A
VHV = 300 V (DC)
-
-
30
A
8
-
14
V
11
12
13
V
8
9
10
V
2
-
-
V
4.5
5
5.5
V
High-voltage
Ileak(DRAIN)
Ileak(HV)
leakage current on pin DRAIN
leakage current on pin HV
Supply
operating range
[1]
VCC
supply voltage
VCC(startup)
start-up supply voltage
VCC(stop)
stop supply voltage
VCC(hys)
hysteresis of supply voltage
VCC(rst)
reset supply voltage
VCC(swon)reg
regulator switch-on supply
voltage
insufficient dV/dt supply
8.75
9.25
9.75
V
VCC(swoff)reg
regulator switch-off supply
voltage
insufficient dV/dt supply
9.5
10
10.5
V
VCC(reg)hys
regulator supply voltage
hysteresis
VCC(swoff)reg VCC(swon)reg
0.3
-
-
V
VCC(swon)reg VCC(stop)
0.3
-
-
V
between VCC(startup) and VCC(stop)
VCC(regswon-stop) supply voltage difference
between regulator switch-on and
stop
Consumption
Istb(HV)
standby current on pin HV
during start-up or in protection;
VHV = 100 V
300
350
400
A
ICC
supply current
normal operation
-
1.3
-
mA
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Compact non-dimmable LED driver IC
Table 7.
Characteristics …continued
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
high supply current on pin HV
Standby: VHV = 40 V;
VCC < VCC(stop)
1
1.3
1.6
mA
Regulator On: VHV = 40 V;
VCC < VCC(swon)reg after start-up
2
2.3
2.6
mA
Capability
Isup(high)HV
Current and SWP
Vth(ocp)SOURCE
overcurrent protection threshold
voltage on pin SOURCE
V/t = 0.1 V/s
480
500
520
mV
V/t = 0.1 V/s; VNTC = 0.325 V
230
250
270
mV
td(ocp-swoff)
delay time from overcurrent
protection to switch-off
V/t = 0.1 V/s
-
75
100
ns
tleb
leading edge blanking time
overcurrent protection
260
300
340
ns
short-winding protection
210
250
290
ns
tleb
leading edge blanking time
difference
between tleb for overcurrent
protection and short-winding
protection
30
50
-
ns
Vth(swp)SOURCE
short-winding protection
threshold voltage on pin
SOURCE
SSL21081 and SSL21083T only
1.4
1.5
1.6
V
30
20
10
V/s
200
550
1000
kHz
15
20
25
V
-
100
-
ns
12.5
15
17.5
s
breakdown voltage on pin DRAIN 600 V (DC) version; Tj > 0 C
600
-
-
V
300 V (DC) version; Tj > 0 C
300
-
-
V
Valley detection
(V/t)vrec
valley recognition voltage change on pin DRAIN
with time
fring
ringing frequency
Vvrec(min)
minimum valley recognition
voltage difference
td(vrec-swon)
valley recognition to switch-on
delay time
[2]
voltage drop on pin DRAIN
Brownout detection
ton(high)
high on-time
MOSFET output stage
VBR(DRAIN)
RDSon
drain-source on-state resistance
600 V (DC) version; Tj = 25 C
4
5
6
600 V (DC) version; Tj = 125 C
6
7.5
9
300 V (DC) version; Tj = 25 C
2.05
2.3
2.55
3.05
3.45
3.85
-
1.2
-
V/ns
-
1.5
-
V/ns
300 V (DC) version; Tj = 125 C
dV/dt)f(DRAIN)
fall rate of change of voltage on
pin DRAIN
300 V (DC) version;
CDRAIN = 150 pF, RSOURCE = 2.2
600 V (DC) version;
CDRAIN = 75 pF; RSOURCE = 1.2
SSL21081_SSL21083
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 11 October 2012
[2]
© NXP B.V. 2012. All rights reserved.
14 of 22
SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
Table 7.
Characteristics …continued
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
0.5
0.53
V
NTC function
Vth(high)NTC
high threshold voltage on pin
NTC
0.47
Vth(low)NTC
low threshold voltage on pin NTC
0.325 0.35
0.375 V
Vact(tmr)NTC
timer activation voltage on pin
NTC
0.26
0.29
0.325 V
Vdeact(tmr)NTC
timer deactivation voltage on pin
NTC
0.17
0.2
0.23
V
tto(deact)NTC
deactivation time-out time on pin
NTC
33
46
59
s
Ioffset(NTC)
offset current on pin NTC
-
47
-
A
tdet(sc)
short-circuit detection time
16
20
24
ms
toff(high)
high off-time
30
36
42
s
OSP
Temperature protections
Tth(act)otp
overtemperature protection
activation threshold temperature
160
170
180
C
Tth(rel)otp
overtemperature protection
release threshold temperature
90
100
110
C
[1]
The maximum operating voltage at VCC can exceed 14 V when determined by the IC using the dV/dt supply.
[2]
This parameter is not tested during production, by design it is guaranteed.
SSL21081_SSL21083
Product data sheet
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Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
12. SSL21081/SSL21083 buck configuration
L1
fuse
LED+
L1
10 Ω
to
mains
D1
C1
RGND
C2
C3
LED1...n
D2
D3
N
LEDL2
IC1
HV
R1
SOURCE
VCC
NTC
C5
C6
1
8
2
7
IC
3
6
4
5
DRAIN
GND
GND
C4
DVDT
RT1
NTC
RGND
001aan696
Fig 6.
Buck configuration for SSL21081/SSL21083
Further application information can be found in the SSL21081/SSL21083 application note.
SSL21081_SSL21083
Product data sheet
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Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
13. Package outline
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
D
E
A
X
c
y
HE
v M A
Z
5
8
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
4
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
5.0
4.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100
0.014 0.0075
0.20
0.19
0.16
0.15
0.05
0.01
0.01
0.004
0.028
0.012
0.244
0.039 0.028
0.041
0.228
0.016 0.024
θ
8o
o
0
Notes
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
Fig 7.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT96-1
076E03
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
Package outline SOT96-1 (SOT8)
SSL21081_SSL21083
Product data sheet
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Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
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SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
14. Abbreviations
Table 8.
Abbreviations
Acronym
Description
BCM
Boundary Conduction Mode
BOM
Bill Of Materials
LED
Light Emitting Diode
LEB
Leading-Edge Blanking
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
SWP
Short-Winding Protection
UVLO
UnderVoltage LockOut
ZCS
Zero Current Switching
15. References
[1]
SSL21081_SSL21083
Product data sheet
AN11040 — Drivers for LED lighting - application note
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
18 of 22
SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
16. Revision history
Table 9.
Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
SSL21081_SSL21083 v.5
20121011
Product data sheet
-
SSL2108_SER v.4
SSL2108_SER v.4
20120508
Product data sheet
-
SSL21081T_2T_3T_4T v.3.1
SSL21081T_2T_3T_4T v.3.1 20120222
Product data sheet
-
SSL21081T_2T_3T_4T v.3
SSL21081T_2T_3T_4T v.3
20120214
Product data sheet
-
SSL21081T_2T_3T_4T v.2
SSL21081T_2T_3T_4T v.2
20111206
Preliminary data sheet
-
SSL2108X v.1
SSL2108X v.1
20110909
Preliminary data sheet
-
-
SSL21081_SSL21083
Product data sheet
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Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
19 of 22
SSL21081/SSL21083
NXP Semiconductors
Compact non-dimmable LED driver IC
17. Legal information
17.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
17.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
17.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
SSL21081_SSL21083
Product data sheet
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
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SSL21081/SSL21083
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Compact non-dimmable LED driver IC
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
17.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
GreenChip — is a trademark of NXP B.V.
18. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
SSL21081_SSL21083
Product data sheet
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Rev. 5 — 11 October 2012
© NXP B.V. 2012. All rights reserved.
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NXP Semiconductors
SSL21081/SSL21083
Compact non-dimmable LED driver IC
19. Contents
1
2
3
4
5
5.1
6
7
7.1
7.2
8
8.1
8.2
8.3
8.3.1
8.3.2
8.3.3
8.3.4
8.3.5
8.3.6
8.3.7
8.4
8.5
8.6
8.7
8.7.1
8.8
9
10
11
12
13
14
15
16
17
17.1
17.2
17.3
17.4
18
19
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick reference data . . . . . . . . . . . . . . . . . . . . . 3
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 6
Converter operation . . . . . . . . . . . . . . . . . . . . . 6
Valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 6
Protective features . . . . . . . . . . . . . . . . . . . . . . 7
UnderVoltage LockOut (UVLO) . . . . . . . . . . . . 7
Leading-Edge Blanking (LEB) . . . . . . . . . . . . . 8
OverCurrent Protection (OCP) . . . . . . . . . . . . . 8
OverTemperature Protection (OTP) . . . . . . . . . 8
Brownout protection . . . . . . . . . . . . . . . . . . . . . 8
Short-Winding Protection (SWP)
SSL21081T/SSL21083T only . . . . . . . . . . . . . . 8
Output Short Protection (OSP) . . . . . . . . . . . . . 8
VCC supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DVDT pin supply (dV/dt) . . . . . . . . . . . . . . . . . . 9
VCC regulator . . . . . . . . . . . . . . . . . . . . . . . . . . 9
NTC function and PWM current regulation . . . . 9
Soft-start function . . . . . . . . . . . . . . . . . . . . . . 10
Heat sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermal characteristics . . . . . . . . . . . . . . . . . 13
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13
SSL21081/SSL21083 buck configuration. . . . 16
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 18
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 19
Legal information. . . . . . . . . . . . . . . . . . . . . . . 20
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 20
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Contact information. . . . . . . . . . . . . . . . . . . . . 21
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2012.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 11 October 2012
Document identifier: SSL21081_SSL21083