SSL21082T/1,118

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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 2 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions [1] Min Typ Max Unit 8 - 16 V 2.05 2.3 2.55  VCC supply voltage operating range RDSon drain-source on-state resistance Tj = 25 C 3.05 3.45 3.85  IDRAIN current on pin DRAIN 2 - +2 A VDRAIN voltage on pin DRAIN 0.4 - +300 V fconv conversion frequency - 100 - kHz [1] Tj = 125 C 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 SSL21082T SSL21082T Product data sheet Package Name Description SO12 plastic small package outline body; 12 leads; body width SOT1196-1 3.9 mm All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 Version © NXP B.V. 2013. All rights reserved. 3 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 6. Block diagram HV VCC 1 4 JFET SUPPLY: INTERNAL REGULATOR AND BANDGAP dV/dT SUPPLY 9 VALLEY DETECTION 12 DVDT DRAIN LOGIC TOFFMAX 8 NTC 5 NTC FUNCTION THERMAL SHUTDOWN TONMOD TONMOD LOGIC CONTROL AND PROTECTION BLANK 3 SOURCE POR 1.5 V GND 2, 6, 7, 10, 11 0.5 V < >0.25 V 001aan694 Fig 1. SSL21082T Product data sheet SSL21082T block diagram All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 4 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 7. Pinning information 7.1 Pinning HV 1 12 DRAIN GND 2 11 GND SOURCE 3 VCC 4 9 DVDT NTC 5 8 TONMOD GND 6 7 GND IC 10 GND 001aan703 Fig 2. SSL21082T pin configuration 7.2 Pin description Table 3. SSL21082T Product data sheet Pin description Symbol Pin Description HV 1 high-voltage supply pin GND 2, 6,7, 10, 11 ground SOURCE 3 low-side external switch VCC 4 supply voltage NTC 5 temperature protection input TONMOD 8 on-time modulation input DVDT 9 AC supply pin DRAIN 12 high-side external switch All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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. 5LQUXVK   9L 9R /('V /  72102' +9 9&& '9'7   '5$,1    ,&   *1'  17& 17&  6285&( 5VHQVH DDD Fig 3. SSL21082T Product data sheet SSL21082T basic application diagram All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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. VGATE VOUT VDRAIN VIN valley 0 demagnetization magnetization IL 0 2 1 t0 t1 3 t2 4 t3 t00 T aaa-001744 Fig 4. SSL21082T Product data sheet Waveforms and valley detection All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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. WRIIKLJK WRQKLJK 9&&VWRS 6 4 5 7,0(5 WGHWVF SSL21082T Product data sheet 4 263 5 • 9&&UVW 9$//(< '(7(&7,21 Fig 5. 6 DDD OSP logic diagram All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 10 of 22 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 Fig 6. 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 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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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.  T j  max  – T amb  R th  j – a  = --------------------------------------P (1) Where: Rth(j-a) = thermal resistance from junction to ambient Tj(max) = maximum junction temperature Tamb = ambient temperature P = Power dissipation SSL21082T Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 12 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 9. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit SR slew rate on pin DRAIN 5 +5 V/ns Ptot total power dissipation SO12 package - 1 W Tamb ambient temperature 40 +125 C Tj junction temperature 40 +150 C Tstg storage temperature 55 +150 C 0.4 +20 V 0.4 +300 V General Voltages continuous [1] VCC supply voltage VDRAIN voltage on pin DRAIN 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 VTONMOD voltage on pin TONMOD current limited 0.4 +5.2 V IDD supply current on pin VCC - 20 mA IDRAIN current on pin DRAIN 2 +2 A ISOURCE current on pin SOURCE 2 +2 A IDVTD current on pin DVDT duration 20 s maximum - 1.3 A human body model; pins DRAIN and HV 1 +1 kV Currents [2] Electrostatic discharge VESD SSL21082T Product data sheet electrostatic discharge voltage human body model; all other pins [3] 2 +2 kV charged device [4] 500 +500 V [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. All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 13 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 10. Thermal characteristics Table 5. Thermal characteristics Symbol Parameter Conditions Typ Unit Rth(j-a) 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 j-top thermal characterization parameter from junction to top of package top package temperature measured at the warmest point on top of the case 3.4 K/W 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 Parameter fconv conversion frequency Conditions Min Typ Max Unit - 100 - kHz High-voltage Ileak(DRAIN) leakage current on pin DRAIN VDRAIN = 300 V - - 10 A Ileak(HV) leakage current on pin HV VHV = 300 V - - 30 A VCC supply voltage operating range 8 - 16 V VCC(startup) start-up supply voltage 11 12 13 V VCC(stop) stop supply voltage VCC(hys) hysteresis of supply voltage VCC(rst) Supply [1] 8 9 10 V 2 - 4.5 V reset supply voltage 4.5 5 5.5 V VCC(swon)reg regulator switch-on supply voltage 8.75 9.25 9.75 V VCC(swoff)reg regulator switch-off supply voltage 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(INT) internal supply current normal operation - 1.3 - mA 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 SSL21082T Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 14 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 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 480 500 520 mV V/t = 0.1 V/s; VNTC = 0.325 V 230 250 270 mV - 75 100 ns td(ocp-swoff) delay time from overcurrent protection to switch-off V/t = 0.1 V/s tleb leading edge blanking time overcurrent protection 260 300 340 ns tleb leading edge blanking time difference between tleb for OCP and SWP 30 50 - ns 1.4 1.5 1.6 V 30 20 10 V/s 200 550 1000 kHz 15 20 25 V - 100 - ns Vth(SWP)SOURCE short-winding protection threshold voltage on pin SOURCE Valley detection (V/t)vrec valley recognition voltage change with time fring ringing frequency Vvrec(min) minimum valley recognition voltage difference td(vrec-swon) valley recognition to switch-on delay time on pin DRAIN [2] voltage drop on pin DRAIN Brownout detection Vth(TONMOD) threshold voltage on pin TONMOD 3.75 4 4.25 V Ioffset(TONMOD) offset current on pin TONMOD 37 43 48 A ton(high) high on-time 12.5 15 17.5 s MOSFET output stage VBR(DRAIN) breakdown voltage on pin DRAIN Tj > 0 C 300  - V RDSon drain-source on-state resistance Tj = 25 C 2.05 2.3 2.55  Tj = 125 C 3.05 3.45 3.85  dV/dt)f(DRAIN) fall rate of change of voltage on pin CDRAIN = 150 pF; DRAIN RSOURCE = 2.2  - 1.2 - V/ns V NTC functionality Vth(high)NTC high threshold voltage on pin NTC 0.47 0.5 0.53 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 0.3 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 SSL21082T Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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 Parameter Conditions Min Typ Max Unit Temperature protection 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] 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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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 HE y v A Z 12 7 A2 A A3 A1 pin 1 index θ Lp 1 L 6 e1 e2 w detail X bp 0 1 2 Dimensions D(1) E(1) max 1.75 0.25 1.45 0.49 0.25 8.75 nom 0.18 1.35 0.25 0.43 0.22 8.65 min 0.10 1.25 0.36 0.10 8.55 4.0 3.9 3.8 Unit mm 3 4 5 mm scale A A1 A2 A3 bp c e1 e2 2.54 1.27 HE L Lp 6.2 6.0 5.8 1.05 1.0 0.7 0.4 Q v w 0.70 0.65 0.25 0.25 0.60 y Z(2) θ 0.1 0.7 0.5 0.3 8° 4° 0° 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. References Outline version IEC JEDEC JEITA SOT1196-1 --- MS-012 Compliant --- Fig 7. sot1196-1_po European projection Issue date 11-02-15 11-02-16 Package outline SOT1196-1 (SO12) SSL21082T Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 17 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 13. Abbreviations Table 7. Abbreviations Acronym Description BCM Boundary Conduction Mode LEB Leading-Edge Blanking LED Light Emitting Diode MOSFET Metal-Oxide Semiconductor Field-Effect Transistor OCP OverCurrent Protection OTP OverTemperature Protection PCB Printed-Circuit Board PWM Pulse-Width Modulation SWP Short-Winding Protection TVS Transient Voltage Suppression UVLO UnderVoltage LockOut ZCS Zero-Current Switching 14. References SSL21082T Product data sheet [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 All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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 Change notice Supersedes SSL21082T v.6 20131003 Product data sheet - Modifications: • SSL21082_SSL21084 v.5 Text and drawings have been updated throughout the data sheet. SSL21082_SSL21084 v.5 20121214 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 Product data sheet - SSL21081T_2T_3T_4T v.2 20120214 SSL21081T_2T_3T_4T v.2 20111206 Preliminary data sheet - SSL2108X v.1 SSL2108X v.1 20110909 Preliminary data sheet - - SSL21082T Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 19 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 16. Legal information 16.1 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. 16.2 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. 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. 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. SSL21082T 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. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 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. 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. 16.4 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. 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 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 3 October 2013 © NXP B.V. 2013. All rights reserved. 21 of 22 SSL21082T NXP Semiconductors Mains dimmable LED driver IC 18. Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 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 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quick reference data . . . . . . . . . . . . . . . . . . . . . 3 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 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 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 13 Thermal characteristics . . . . . . . . . . . . . . . . . 14 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 14 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. 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