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1. General description

The SSL2109T is a high-voltage Integrated Circuit (IC) for driving LED lamps in general

lighting applications.

The main benefits of this IC include:

• Small Printed-Circuit Board (PCB) footprint and compact solution

• High efficiency (up to 95 %) for non-dimmable high power factor solutions

• High power factor >0.9 (application dependent)

• Ease of integration and many protection features

• Low electronic Bill Of Material (BOM)

• Highly flexible IC for use in buck, buck/boost and flyback modes

• Single inductor used for non-isolated configurations because of internal

demagnetization detection and dV/dt supply

The IC is supplementary to the SSL21081/SSL21083 series but without an internal switch.

The IC ha

s 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 functionality provides full flexibility in the

application design. An internal clamp limits the supply voltage.

The IC provides accurate output current control to within 5 % LED current accuracy. The

IC 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 IC for driving strings of LEDs or high-voltage LED modules from a rectified

mains supply

 Part of a high-efficiency switch mode flyback or buck product family.

 Driver-only which can drive an external MOSFET

 Driver that has power-efficient boundary conduction mode of operation with:

 No reverse recovery losses in fre

wheel diode

 Zero Current Switching (ZCS)

for switch turn-on

 Zero voltage or valley

switching for switch turn-off

 Minimal required inductance value and size

 Suitable for high power factor (>0.9) applications

 Applicable in buck, buck/boost and flyback topologies

SSL2109T

Compact non-dimmable LED driver IC

Rev. 5 — 3 October 2013 Product data sheet

Summary of content (20 pages)

PAGE 1
SSL2109T Compact non-dimmable LED driver IC Rev. 5 — 3 October 2013 Product data sheet 1. General description The SSL2109T is a high-voltage Integrated Circuit (IC) for driving LED lamps in general lighting applications. The main benefits of this IC include: • • • • • • • Small Printed-Circuit Board (PCB) footprint and compact solution High efficiency (up to 95 %) for non-dimmable high power factor solutions High power factor >0.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC  Direct PWM current regulation possible  Fast transient response through cycle-by-cycle current control:  Negligible AC mains ripple in LED current and minimal total capacitance in low ripple configurations  No over or undershoots in the LED current  Simple high input power factor solution (>0.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 5. Ordering information Table 2. Ordering information Type number SSL2109T Package Name Description Version SO8 plastic small package outline body; 8 leads; body width 3.9 mm SOT96-1 6. Block diagram +9 9&& -)(7 G9 G7 6833/< 9$//(< '(7(&7,21 '9'7 6833/< ,17(51$/ 5(*8/$725 $1' %$1'*$3 '5$,1 /2*,& 72))0$; 17& 17& )81&7,21 7+(50$/ 6+87'2:1 7210$; /2*,& &21752/ $1' 3527(&7,21 '5,9(5 %/$1.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 7. Pinning information 7.1 Pinning +9 9&& '5$,1 *1' ,& 17& '9'7 6285&( '5,9(5 DDD Fig 2. SSL2109T pin configuration 7.2 Pin description Table 3.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 8. Functional description 8.1 Introduction The SSL2109T is a driver for small form factor retrofit SSL lamps and separate LED drivers. 8.2 Converter operation The converter in the SSL2109T is a Boundary Conduction Mode (BCM), peak current controlled system. Figure 3 shows the basic application diagram. Figure 4 shows the waveforms. This converter type operates at the boundary between continuous and discontinuous mode.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 8.4 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.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 8.5 Protective features The IC has the following protections: • • • • • • • • UnderVoltage LockOut (UVLO) Leading-Edge Blanking (LEB) OverCurrent Protection (OCP) Internal OverTemperature Protection (OTP) Brownout protection Short-Winding Protection (SWP) Output Short Protection (OSP) LED overtemperature control and protection The SWP and the OSP are latched protections.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 8.5.5 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 has to remain constant. The input current would otherwise increase to a level that is too high for the input circuitry. For the SSL2109T, there is a maximum limit on the on-time of switch ton(high).
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 8.6 VCC supply The SSL2109T can be 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.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 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.
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SSL2109T NXP Semiconductors Compact non-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 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 +20 V 0.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 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.
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SSL2109T NXP Semiconductors Compact non-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.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 12. Application information An LED driver with the SSL2109T can be a buck, tapped buck or flyback converter operating in BCM. Figure 7 shows a buck solution in a low ripple configuration using a minimum of components. Capacitor C3 buffers the IC supply voltage, which is powered via the HV pin at start-up and via C5 during normal operation. Sense resistors R4 and R5 convert the current through MOSFET Q1 into a voltage on pin Source.
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SSL2109T 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.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 14. Abbreviations Table 7.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 16. Revision history Table 8. Revision history Document ID Release date Data sheet status Change notice Supersedes SSL2109T v.5 20131003 Product data sheet - SSL2109_SER v.4 Modifications: • Text and graphics have been updated throughout the data sheet. SSL2109_SER v.4 20121026 Product data sheet - SSL2109_SER v.3 SSL2109_SER v.3 20120604 Product data sheet - SSL2109T v.2 SSL2109T v.
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SSL2109T 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.
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SSL2109T NXP Semiconductors 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.
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SSL2109T NXP Semiconductors Compact non-dimmable LED driver IC 19. Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.5.1 8.5.2 8.5.3 8.5.4 8.5.5 8.5.6 8.5.7 8.6 8.7 8.8 8.9 8.9.1 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 . . . . . . . . . . . . . . . . . . . . .