SSL21082T/1,118 [NXP]
Dimmable LED driver IC SOP 12-Pin;
| 型号： | SSL21082T/1,118 |
| 厂家： | 
NXP |
| 描述： | Dimmable LED driver IC SOP 12-Pin |
| 文件： | 总22页 (文件大小：483K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
SSL21082T
NXP Semiconductors
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
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
2 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
4. Quick reference data
Table 1.
Quick reference data
Symbol Parameter
Conditions
operating range
Tj = 25 C
Min
8
Typ Max Unit
[1]
VCC
supply voltage
-
16
V
A
RDSon
drain-source
2.05
3.05
2
2.3
2.55
on-state resistance
Tj = 125 C
3.45 3.85
IDRAIN
current on pin
DRAIN
-
+2
+300
-
VDRAIN voltage on pin
DRAIN
0.4
-
V
fconv
conversion
frequency
-
100
kHz
[1] An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum IDD
value (see Table 4).
5. Ordering information
Table 2.
Ordering information
Type number Package
Name
Description
Version
SSL21082T
SO12
plastic small package outline body; 12 leads; body width SOT1196-1
3.9 mm
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
3 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
6. Block diagram
1
4
HV
JFET
9
dV/dT
DVDT
SUPPLY
SUPPLY:
INTERNAL
REGULATOR
AND
VCC
BANDGAP
12
VALLEY
DETECTION
DRAIN
LOGIC
TOFFMAX
8
TONMOD
5
NTC
NTC
FUNCTION
TONMOD
LOGIC
CONTROL
AND
THERMAL
SHUTDOWN
BLANK
3
SOURCE
PROTECTION
POR
1.5 V
GND
2, 6, 7, 10, 11
0.5 V < >0.25 V
001aan694
Fig 1. SSL21082T block diagram
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
4 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
7. Pinning information
7.1 Pinning
1
12
HV
DRAIN
2
3
4
5
6
11
10
9
GND
SOURCE
VCC
GND
IC
GND
DVDT
TONMOD
GND
8
NTC
7
GND
001aan703
Fig 2. SSL21082T pin configuration
7.2 Pin description
Table 3.
Pin description
Symbol
HV
Pin
Description
1
high-voltage supply pin
ground
GND
2, 6,7, 10, 11
SOURCE
VCC
3
low-side external switch
supply voltage
4
NTC
5
temperature protection input
on-time modulation input
AC supply pin
TONMOD
DVDT
DRAIN
8
9
12
high-side external switch
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
5 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
8. Functional description
8.1 Introduction
The SSL21082T is a driver IC solution for small form factor mains phase-cut dimmable
LED lamps in isolated and non-isolated applications.
8.2 Converter operation
The converter in the SSL21082T is a Boundary Conduction Mode (BCM), peak current
controlled system. See Figure 3 for the basic application diagram. See Figure 4 for
relevant the waveforms.
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 MOSFET is switched on. The amplitude of the current build-up
in L is proportional to the voltage drop over the inductor and the time that the MOSFET
switch is on. When the MOSFET is switched off, the energy in the inductor is released
towards the output. The current then falls at a rate proportional to the value of VO. The
LED current ILED depends on the peak current through the inductor (SSL21082T
controlled) and on the dimmer angle while it is optimized for a high-power factor. A new
cycle is started once the inductor current IL is zero. This quasi-resonant operation results
in higher efficiency.
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Fig 3. SSL21082T basic application diagram
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
6 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
8.3 Valley detection
A new cycle is started when the primary switch is switched on (see Figure 4). In the
following sections, “on” represents the conductive state and off the non-conductive state.
Following time t1, when the peak current is detected on the SOURCE pin, the switch is
turned off and the secondary stroke starts at t2. When the secondary stroke is completed
with the coil current at t3 equaling zero, the drain voltage starts to oscillate at
approximately the Vi VO level. The peak-to-peak amplitude equals 2 VO. In a tapped
buck topology, this amplitude is multiplied by the ratio of the windings.
A special feature, called valley detection is an integrated part of the SSL21082T circuitry.
Dedicated built-in circuitry connected to the DRAIN pin, senses when the voltage on the
drain of the switch reaches its lowest value. The next cycle is then started at t00 and as a
result the capacitive switching losses are reduced. If both the frequency of the oscillations
and the voltage swing are within the range specified (fring and Vvrec(min)) for detection, a
valley is detected and accepted. 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.
V
GATE
V
OUT
V
DRAIN
V
IN
valley
0
magnetization
demagnetization
I
L
0
2
1
3
4
t
00
t
0
t
t
2
t
3
1
T
aaa-001744
Fig 4. Waveforms and valley detection
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
7 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
8.4 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)
• LED OverTemperature Control (OTC) and overtemperature protection
• An optional output OverVoltage Protection (OVP) circuit is implemented using
external components and the NTC pin.
• Output Short Protection (OSP)
The internal OTP and LED over temperature protections are safe-restart protections. The
IC halts, causing VCC to drop to below VCC(stop) and triggers a start-up. When VCC drops to
below VCC(rst), the IC resets the latch protection mode. If VCC drops to below VCC(stop), the
IC halts. Switching starts only when no fault condition exists.
8.4.1 UnderVoltage LockOut (UVLO)
When the voltage on the VCC pin < VCC(stop), the IC stops switching. An attempt is then
made to restart by supplying VCC from the HV pin voltage.
8.4.2 Leading-Edge Blanking (LEB)
To prevent false detection of the short-winding or overcurrent, a blanking time following
switch-on is implemented. When the MOSFET switch switches on there can be a short
current spike due to capacitive discharge of voltage over the drain and source and the
charging of the gate to source capacitance. During the LEB time (tleb), the spike is
disregarded.
8.4.3 OverCurrent Protection (OCP)
The SSL21082T contains a highly accurate peak current detector. It triggers when the
voltage on 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 (td(ocp-swoff)) between the overcurrent detection and the actual switching
off of the switch. 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.
8.4.4 OverTemperature Protection (OTP)
When the internal OTP function is triggered at a certain IC temperature (Tth(act)otp), the
converter stops operating. The OTP safe-restart protection and the IC restart with
switching resuming when the IC temperature drops below Tth(rel)otp
.
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
8 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
8.4.5 Brownout protection
Brownout protection is designed to limit the lamp power when the input voltage drops
close to the output voltage level. The input power must remain constant. The input current
would otherwise increase to a level that is too high for the input circuitry. In the
SSL21082T, there is a maximum limit on the on-time of switch ton(high)
.
In buck mode, 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.
8.4.6 ton control
The ton(high) can be lowered by connecting a capacitor to the TONMOD pin. The external
capacitor is charged during the primary stroke with Ioffset(TONMOD). If the Vth(TONMOD) level
is reached before the ton(high) time, the switch is turned off and the secondary stroke starts.
When a capacitor is not connected to the pin, Vth(TONMOD) is reached quickly, shorter than
the minimum limit of 1 s. In this case or when the TONMOD pin is grounded, the internal
time constant, ton(high) determines the maximum on-time. This function is used to control
the converter operation over the mains cycle which enables the design of a mains
dimmable driver.
8.4.7 Short-Winding Protection (SWP)
This protection activates when there is a steep rising current on the SOURCE pin. This
current occurs when there is very small inductor or no inductor is present at all between
the input voltage and DRAIN pin. When the voltage on the SOURCE pin is > 1.5 V after
the leading-edge blanking time, the latched protection is triggered.
8.4.8 Output Short-circuit Protection (OSP)
During the secondary stroke (switch-off 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 start-up or due to a short-circuit. A
timer tdet(sc) is started when toff(high) is detected. Timer tdet(sc) is reset when a valid valley
detection occurs in one of the subsequent cycles or when VCC drops to below VCC(stop)
.
The timer can also be reset if the maximum limit on the on-time of the switch (ton(high)) is
reached, which is usually the case at start-up (brownout protection). If no valley is
detected and (ton(high)) is not reached before tdet(sc), then it is concluded that a real
short-circuit exists. The IC enters latched protection. If VCC drops to below VCC(rst), the IC
resets the latched protection mode (see Figure 5). During PWM dimming, the OSP timer
is paused during the off cycle.
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Fig 5. OSP logic diagram
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
9 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
The value of ton(high) depends on the capacitor connected to the TONMOD pin. An open or
shorted TONMOD pin sets ton(high) to 15 s (see Section 8.4.6 and Table 6).
8.5 VCC supply
The SSL21082T can be supplied using three methods:
• Under normal operation, the voltage swing on the DVDT pin is internally rectified to
provide current on 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.
• Using an auxiliary winding, the voltage can be rectified and connected to the VCC pin
via a series resistor.
The IC starts up when the voltage at the VCC pin exceeds VCC(startup). The IC locks out
(stops switching) when the voltage on 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 external supply is stable. The SSL21082T 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 supply
minus the current consumption of the IC (determined by the load on the gate drivers), is
lower than the maximum value of IDD, an external Zener diode is not required in the supply
circuit.
8.5.1 VCC regulator
During supply dips, the input voltage can drop too low to supply the required IC current.
Under these conditions, if the VCC voltage drops lower than the VCC(swon)reg level, a
second regulator is started. Its function is to fill in the required supply current which the
external supply does not deliver. It prevents that the IC goes into UVLO. When the VCC
voltage exceeds VCC(swon)reg level, the regulator is turned off.
8.6 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 this pin, the IC can be powered
without another external power connection. This provides a compact and effective solution
without introducing high power losses and without requiring an additional inductor
winding.
8.7 NTC functionality and PWM dimming
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
dimming). 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 6.
.
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
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SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
During start-up, before VCC reaches VCC(startup) the voltage on the NTC pin must be less
than the minimum value of Vact(tmr)NTC. This is valid when the voltage on the NTC pin is
derived from the VCC using a resistive divider and a PTC in series with the resistor
between pins VCC and NTC.
If an NTC resistor is connected between the NTC pin and ground, the voltage on the NTC
pin is 0 V when VCC reaches VCC(startup)
.
Peak current
I
V
= 500 mV
= 250 mV
pk
th(ocp)SOURCE
th(ocp)SOURCE
V
I
pk
/ 2
1
2
3
4
5
V
NTC
001aan700
Fig 6. NTC control curve
When the voltage on the NTC pin exceeds Vth(high)NTC (see Figure 6 (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 6 (3)). The peak current is
now half the peak current of nominal operation. When Vact(tmr)NTC is passed (see Figure 6
(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 (see Figure 6 (1))
LED overtemperature is detected. The IC stops switching and attempts to restart from
the HV pin voltage. The converter restarts from an NTC protection shutdown when the
voltage on the NTC pin exceeds Vth(high)NTC (see Figure 6 (4)). It is assumed that the
reduction in peak current does 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 (see Figure 6 (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 dimming can be implemented this
way. The output current rises again when the voltage is higher than Vth(low)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 (see Figure 6 (3)), the convertor starts with half of
the maximum current. The output current slowly increases to maximum when Vth(high)NTC
(see Figure 6 (4)) is reached.
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
11 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
8.8 Heat sink
In SSL21082T applications, the PCB copper acts as the heat sink. The IC has thermal
leads (GND pins 2, 6, 10 and 11) for enhanced heat transfer from die to the PCB copper
heat sink. The thermal lead connection can drastically reduce thermal resistance.
Equation 1 shows the relationship between the maximum allowable power dissipation and
the thermal resistance from junction to ambient.
Tjmax – Tamb
---------------------------------------
Rthj – a
=
(1)
P
Where:
Rth(j-a) = thermal resistance from junction to ambient
Tj(max) = maximum junction temperature
Tamb = ambient temperature
P = Power dissipation
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
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SSL21082T
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Mains dimmable LED driver IC
9. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
General
SR
Parameter
Conditions
Min
Max
Unit
slew rate
on pin DRAIN
SO12 package
5
+5
V/ns
W
Ptot
total power dissipation
ambient temperature
junction temperature
storage temperature
-
1
Tamb
40
40
55
+125
+150
+150
C
Tj
C
Tstg
C
Voltages
VCC
[1]
supply voltage
continuous
0.4
0.4
0.4
0.4
0.4
0.4
+20
V
V
V
V
V
V
VDRAIN
VHV
VSOURCE
VNTC
voltage on pin DRAIN
voltage on pin HV
+300
+600
+5.2
+5.2
+5.2
current limited
current limited
current limited
current limited
voltage on pin SOURCE
voltage on pin NTC
voltage on pin TONMOD
VTONMOD
Currents
IDD
[2]
supply current
on pin VCC
-
20
+2
+2
1.3
mA
A
IDRAIN
ISOURCE
IDVTD
current on pin DRAIN
current on pin SOURCE
current on pin DVDT
2
2
-
A
duration 20 s
A
maximum
Electrostatic discharge
VESD electrostatic discharge
voltage
human body
model; pins
DRAIN and HV
1
+1
kV
kV
V
[3]
[4]
human body
model; all other
pins
2
+2
charged device
500
+500
[1] The current flowing into the VCC pin must not exceed the maximum IDD value.
[2] An internal clamp sets the supply voltage.
[3] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
[4] 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.
SSL21082T
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Product data sheet
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SSL21082T
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10. Thermal characteristics
Table 5.
Symbol
Rth(j-a)
Thermal characteristics
Parameter
Conditions
Typ
Unit
thermal resistance from junction to
ambient
in free air; PCB: 2 cm 3 cm; 2-layer; 35 m
Cu per layer
121
K/W
in free air; PCB: JEDEC 2s2p
53
K/W
K/W
j-top
thermal characterization parameter top package temperature measured at the
from junction to top of package warmest point on top of the case
3.4
11. Characteristics
Table 6.
Characteristics
Values specified at Tamb = 25 C unless otherwise specified; all voltages are measured with respect to ground; currents are
positive when flowing into the IC.
Symbol
fconv
Parameter
Conditions
Min
Typ
Max Unit
conversion frequency
-
100
-
kHz
High-voltage
Ileak(DRAIN)
Ileak(HV)
leakage current on pin DRAIN
leakage current on pin HV
VDRAIN = 300 V
VHV = 300 V
-
-
-
-
10
30
A
A
Supply
[1]
VCC
supply voltage
operating range
8
-
16
13
10
4.5
5.5
9.75
10.5
-
V
V
V
V
V
V
V
V
V
VCC(startup)
VCC(stop)
VCC(hys)
start-up supply voltage
stop supply voltage
11
8
12
9
hysteresis of supply voltage
reset supply voltage
between VCC(startup) and VCC(stop)
2
-
VCC(rst)
4.5
8.75
9.5
0.3
0.3
5
VCC(swon)reg
VCC(swoff)reg
VCC(reg)hys
regulator switch-on supply voltage
regulator switch-off supply voltage
9.25
10
-
regulator supply voltage hysteresis VCC(swoff)reg VCC(swon)reg
VCC(regswon-stop) supply voltage difference between VCC(swon)reg VCC(stop)
-
-
regulator switch-on and stop
Consumption
Istb(HV)
standby current on pin HV
internal supply current
during start-up or in protection;
HV = 100 V
300
-
350
1.3
400
-
A
V
ICC(INT)
normal operation
mA
Capability
Isup(high)HV
high supply current on pin HV
Standby: VHV = 40 V;
VCC < VCC(stop)
1
2
1.3
2.3
1.6
2.6
mA
mA
Regulator on: VHV = 40 V;
VCC < VCC(swon)reg after start-up
SSL21082T
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 3 October 2013
14 of 22
SSL21082T
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Mains dimmable LED driver IC
Table 6.
Characteristics …continued
Values specified at Tamb = 25 C unless otherwise specified; all voltages are measured with respect to ground; currents are
positive when flowing into the IC.
Symbol
Parameter
Conditions
Min
Typ
Max Unit
Current and SWP
Vth(ocp)SOURCE overcurrent protection threshold
voltage on pin SOURCE
V/t = 0.1 V/s
480
230
-
500
250
75
520
270
100
mV
mV
ns
V/t = 0.1 V/s; VNTC = 0.325 V
V/t = 0.1 V/s
td(ocp-swoff)
delay time from overcurrent
protection to switch-off
tleb
leading edge blanking time
overcurrent protection
260
30
300
50
340
-
ns
ns
tleb
leading edge blanking time
difference
between tleb for OCP and SWP
Vth(SWP)SOURCE short-winding protection threshold
voltage on pin SOURCE
1.4
1.5
1.6
V
Valley detection
(V/t)vrec
valley recognition voltage change on pin DRAIN
with time
30
20
10
V/s
[2]
fring
ringing frequency
200
15
550
20
1000 kHz
Vvrec(min)
minimum valley recognition
voltage difference
voltage drop on pin DRAIN
25
V
td(vrec-swon)
valley recognition to switch-on
delay time
-
100
-
ns
Brownout detection
Vth(TONMOD)
Ioffset(TONMOD)
ton(high)
threshold voltage on pin TONMOD
3.75
37
4
4.25
V
offset current on pin TONMOD
high on-time
43
15
48
A
12.5
17.5 s
MOSFET output stage
VBR(DRAIN) breakdown voltage on pin DRAIN Tj > 0 C
RDSon
300
2.05
3.05
-
-
V
drain-source on-state resistance
Tj = 25 C
2.3
3.45
1.2
2.55
3.85
-
Tj = 125 C
dV/dt)f(DRAIN)
fall rate of change of voltage on pin CDRAIN = 150 pF;
DRAIN RSOURCE = 2.2
V/ns
NTC functionality
Vth(high)NTC high threshold voltage on pin NTC
Vth(low)NTC
Vact(tmr)NTC
Vdeact(tmr)NTC
0.47
0.5
0.53
V
V
V
V
low threshold voltage on pin NTC
timer activation voltage on pin NTC
0.325 0.35
0.375
0.325
0.23
0.26
0.17
0.3
0.2
timer deactivation voltage on pin
NTC
tto(deact)NTC
Ioffset(NTC)
deactivation time-out time on pin
NTC
33
-
46
59
-
s
offset current on pin NTC
47
A
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
15 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
Table 6.
Characteristics …continued
Values specified at Tamb = 25 C unless otherwise specified; all voltages are measured with respect to ground; currents are
positive when flowing into the IC.
Symbol
Temperature protection
Tth(act)otp overtemperature protection
Parameter
Conditions
Min
Typ
Max Unit
160
90
170
100
180
110
C
C
activation threshold temperature
Tth(rel)otp
overtemperature protection
release threshold temperature
[1] An internal clamp sets the supply voltage. The current into the VCC pin must not exceed the maximum IDD value (see Table 4).
[2] This parameter is not tested during production. It is guaranteed by design.
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
16 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
12. Package outline
SO12: plastic small outline package; 12 leads; body width 3.9 mm
SOT1196-1
D
E
A
X
c
H
v
A
E
y
Z
12
7
A
2
A
A
3
A
1
pin 1 index
θ
L
p
L
1
6
e
e
2
1
w
detail X
b
p
0
1
2
2
3
4
5 mm
scale
Dimensions
Unit
(1)
(1)
(2)
A
A
1
A
2
A
b
c
D
E
e
1
e
H
L
L
p
Q
v
w
y
Z
θ
3
p
E
°
°
°
8
4
0
max 1.75 0.25 1.45
0.49 0.25 8.75 4.0
0.18 1.35 0.25 0.43 0.22 8.65 3.9 2.54 1.27 6.0 1.05 0.7 0.65 0.25 0.25 0.1 0.5
0.10 1.25 0.36 0.10 8.55 3.8 5.8 0.4 0.60 0.3
6.2
1.0 0.70
0.7
mm nom
min
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
sot1196-1_po
References
Outline
version
European
projection
Issue date
IEC
- - -
JEDEC
JEITA
- - -
11-02-15
11-02-16
SOT1196-1
MS-012 Compliant
Fig 7. Package outline SOT1196-1 (SO12)
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
17 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
13. Abbreviations
Table 7.
Abbreviations
Description
Acronym
BCM
Boundary Conduction Mode
Leading-Edge Blanking
Light Emitting Diode
LEB
LED
MOSFET
OCP
Metal-Oxide Semiconductor Field-Effect Transistor
OverCurrent Protection
OTP
OverTemperature Protection
Printed-Circuit Board
PCB
PWM
SWP
TVS
Pulse-Width Modulation
Short-Winding Protection
Transient Voltage Suppression
UnderVoltage LockOut
UVLO
ZCS
Zero-Current Switching
14. References
[1] AN11041 — SSL21081, SSL21083, and SSL2109 non-dimmable buck converter in
low ripple configurations
[2] AN11263 — 230 V (AC) mains dimmable LED driver using the SSL2129AT or
SSL21084AT
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
18 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
15. Revision history
Table 8.
Revision history
Document ID
Release date Data sheet status
20131003 Product data sheet
• Text and drawings have been updated throughout the data sheet.
Change notice Supersedes
SSL21082T v.6
- SSL21082_SSL21084 v.5
Modifications:
SSL21082_SSL21084 v.5
SSL2108_SER v.4
20121214
Product data sheet
Product data sheet
Product data sheet
Product data sheet
Preliminary data sheet
Preliminary data sheet
-
-
-
-
-
-
SSL2108_SER v.4
SSL21081T_2T_3T_4T v.3.1
SSL21081T_2T_3T_4T v.3
SSL21081T_2T_3T_4T v.2
SSL2108X v.1
20120508
SSL21081T_2T_3T_4T v.3.1 20120222
SSL21081T_2T_3T_4T v.3
SSL21081T_2T_3T_4T v.2
SSL2108X v.1
20120214
20111206
20110909
-
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
19 of 22
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NXP Semiconductors
Mains dimmable LED driver IC
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[1]
[2]
[3]
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
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.
Suitability for use — NXP Semiconductors products are not designed,
16.2 Definitions
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.
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.
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.
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.
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.
16.3 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.
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.
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.
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.
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.
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.
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
20 of 22
SSL21082T
NXP Semiconductors
Mains 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.
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.
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.
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.
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
16.4 Trademarks
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)
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.
17. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
SSL21082T
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Product data sheet
Rev. 6 — 3 October 2013
21 of 22
SSL21082T
NXP Semiconductors
Mains dimmable LED driver IC
18. Contents
1
2
3
4
5
6
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick reference data . . . . . . . . . . . . . . . . . . . . . 3
Ordering information. . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7
7.1
7.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
8
8.1
8.2
8.3
Functional description . . . . . . . . . . . . . . . . . . . 6
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Converter operation . . . . . . . . . . . . . . . . . . . . . 6
Valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 7
Protective features . . . . . . . . . . . . . . . . . . . . . . 8
UnderVoltage LockOut (UVLO) . . . . . . . . . . . . 8
Leading-Edge Blanking (LEB) . . . . . . . . . . . . . 8
OverCurrent Protection (OCP) . . . . . . . . . . . . . 8
OverTemperature Protection (OTP) . . . . . . . . . 8
Brownout protection . . . . . . . . . . . . . . . . . . . . . 9
ton control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Short-Winding Protection (SWP) . . . . . . . . . . . 9
Output Short-circuit Protection (OSP). . . . . . . . 9
VCC supply. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
VCC regulator. . . . . . . . . . . . . . . . . . . . . . . . . 10
DVDT pin supply (dV/dt). . . . . . . . . . . . . . . . . 10
NTC functionality and PWM dimming. . . . . . . 10
Soft-start function . . . . . . . . . . . . . . . . . . . . . . 11
Heat sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
8.4.8
8.5
8.5.1
8.6
8.7
8.7.1
8.8
9
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 13
Thermal characteristics . . . . . . . . . . . . . . . . . 14
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . 14
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 18
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 19
10
11
12
13
14
15
16
Legal information. . . . . . . . . . . . . . . . . . . . . . . 20
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 20
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.1
16.2
16.3
16.4
17
18
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. 2013.
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: 3 October 2013
Document identifier: SSL21082T
相关型号：
SSL21084
IC LED DISPLAY DRIVER, PDSO12, 3.90 MM, PLASTIC, MS-012, SOT1196-1, SOP-12, Display Driver
NXP
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