T a r ge t D a t a s h e et , R e v . 1 . 0 , J u l y 2 00 9 1 2 0 0 m A s t ep d o w n - L E D c o n t r o l l e r I C ILD4120 S m a l l S i g n a l D i s c r et e s Edition 2009-07-06 Published by Infineon Technologies AG, 81726 München, Germany © Infineon Technologies AG 2009. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. ILD4120 1200mA step down - LED controller IC ILD4120, 1200mA step down - LED controller IC Revision History: 2009-07-06, Rev. 1.0 Page Subjects (major changes since last revision) I Target Datasheet 3 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Bipolar Buck- converter LED Controller IC 1 Bipolar Buck- converter LED Controller IC Features • Wide Input Voltage Range: 4.5 V ... 40 V • Internal Power Switch • Over voltage protection • Over current protection • Temperature shut down mechanism • Inherent Open- Circuit LED protection • Soft- Start capability • Low shut down current < 200 nA in operating voltage range • Maximum operating average LED output current: 1200 mA • Multifunctional Enable Pin • Analog and PWM dimming possible • PWM control for LED brightness possible • Typical 3% output current accuracy • Minimum external component required • Package: DSO-8 with exposed pad Applications • LED Controller for industrial applications • Universal Constant Current Source • Generell Illumination e.g. Halogen Replacement • Residential Architectural and Industrial Commercial Lighting for in- and outdoor • Signal and Marker Lights for Orientation or Navigation (e.g. steps, exit ways, etc.) 2 Description The ILD4120 is a hysteretic buck LED controller IC for industrial applications realized in a bipolar IC technology. The LED Controller is capable to drive high current, high brightness LEDs up to 1200 mA. The IC incorporates a wide input voltage range, an internal power switch and the output current level can be adjusted with an external sense resistor. According to the multifunctional control pin the IC can be switched on and off by an external signal, which is also suitable to regulate brightness of the LEDs by PWM or analog dimming. Depending on the value of the switching inductor the switching frequency and the voltage ripple could be set. The precise internal bandgap stabilizes the circuit and provides stable current conditions over temperature range. Furthermore, over voltage protection and temperature shut down mechanism enforce the IC to protect attached LEDs. Additional features are included to protect the LED’s from overload, short circuit events as well as from over voltage. The LED’s can be also protected against thermal overload by thermally coupling the LED’s to the ILD4120. Target Datasheet 4 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Description ILD4120 Buck LED Controller EN 1 8 Vs 7 Vsense 6 Vswitch 5 Vswitch Vstab Vstab Over Voltage Protection PWM I/V 2 Vstab Vref TSD Vstab GND Vstab 3 Vstab GND 4 Over Current Protection Pflaum ILD4120 _Block diagram.vsd Figure 1 Block diagram Pin Definition Table 1 Pin definition and function Pin number Pin Symbol Function 1 EN Enable Voltage 2 PWM Multifunctional Pin; Analog and digital (PWM input) dimming 3 GND IC ground 4 GND IC ground 5 Vswitch Vswitch Isense Vs Power Switch Output 6 7 8 Target Datasheet Power Switch Output LED current sense pin Supply Voltage 5 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Description Maximum Ratings Table 2 Maximum ratings Parameter Symbol Limit Value Unit Supply voltage Vs 45 V Average Output current Iout 1500 mA Total Power Dissipation; Ts= xx°C Ptot TJ TSTG VESD_HBM VESD_MM tbf mW 150 °C -65... 150 °C 2000 V 400 V Junction temperature Storage temperature range ESD capability Human Body Model1) 2) ESD capability Machine Model 1) For ESD testing, the chip was mounted in a DSO-8 package on an application board, where GND is electrically connected to the chip GND 2) For ESD testing, the chip was mounted in a DSO-8 package, where GND is electrically connected to the chip GND Thermal resistance Table 3 Thermal resistance Parameter Symbol Value Unit Junction - solder point RthJS tbf K/W Target Datasheet 6 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Electrical Characteristics 3 Electrical Characteristics 3.1 DC Characteristics 4.5 V < VS < 40 V; - 40 °C < TJ < 150 °C, all voltages with respect to ground; positive; current flowing into pin; unless otherwise specified All parameters have been measured at 25 °C, unless otherwise specified Table 4 DC Characteristics Parameter Symbol Values Min. Typ. Unit Note / Test Condition Max. Overall current consumption Isshort tbf tbf mA LEDs short; Vs = 4.5 V ILED = 350 mA Overall current consumption Isshort tbf tbf mA LEDs short; Vs = 40 V ILED = 350 mA Overall current consumption Isshort µA LEDs short; Vs = 45 V ILED = 350 mA Vs = 4.5 V ILED = 0 mA Vs = 40 V ILED = 0 mA Vs = 45 V ILED = 0 mA tbf Overall current consumption open load Isopen load tbf µA Overall current consumption open load Isopen load tbf µA Overall current consumption open load Isopen load tbf µA Isstandby Overall standby current consumption Isstandby Input Current of multifunctional control IEN Overall standby current consumption 20 200 nA EN = 0 V; Vs= 4.5 V 200 nA EN = 0 V; Vs = 40 V 70 µA At any condition 200 nA At any LED current 100 mV ILED = 1200 mA +/- 15 % At any LED current V V Iout -> 0 A Iout > 200 mA °C Iout -> 0 A; refer to TJ 40 pin Isense Voltage of Sense input Vsense Sense threshold hysteresis Vsensehys Over voltage Protection Vs, OV Residual voltage at collector of power VCE Current of Sense input 42 1 transistor Temperature shut down Target Datasheet ThTSD 115 125 7 135 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Electrical Characteristics 3.2 AC Characteristics All parameters have been measured at 25 °C, unless otherwise specified Table 5 AC Characteristics Parameter Symbol Switching frequency Fsw Maximum switching frequency Fswmax Values Min. Target Datasheet Unit Note / Test Condition 200 kHz Vs = 12 V 3 LEDs in series Rsense = 100 mΩ L = 100 µH VEN = 3 V Iout = 1200mA 500 kHz Recommended Typ. 8 Max. Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Electrical Characteristics 3.3 Digital Signals All parameters have been measured at 25 °C, unless otherwise specified Table 6 Digital Control Parameter (EN) Parameter Symbol Values Min. Multifunctional control pin voltage UPon range Control voltage for power on Control voltage for power off Control voltage for analog dimming UOn UOff Udim Unit Typ. Max. -0.3 2 2.2 V 40 V -0.3 0.6 V 1 2 V Linear dimming 1000 Hz tdutycycle = 1%; fPWM PWM signal frequency 40 Note / Test Condition Full LED current signal level reaches 100% in on and off mode PWM Duty cycle tdutyPWM PWM voltage UPWM 3.4 5 % 40 f = 5 KHz; signal level reaches 100% in on and off mode V Transient Parameters 4.5 V < VS < 40 V; - 40 °C < TJ < 150 °C, all voltages with respect to ground; positive; current flowing into pin; unless otherwise specified All parameters have been measured at 25 °C, unless otherwise specified Table 7 Digital Control Parameter (EN) Parameter Symbol Values Min. Response Time Target Datasheet Typ. Unit Note / Test Condition Max. TON 10 µs EN: 0 -> 5 V @ trise < 20ns Iout = 1200mA TOFF 10 µs EN: 5 V -> 0 @ tfall < 20 ns Iout = 1200mA 9 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Application Circuit 4 Application Circuit Vs EN 1 8 Vstab PWM Vstab 2 Vstab I/V 7 Rsense Vref Vstab 3 TSD Vstab 6 Vstab 4 5 Pflaum ILD4120_ Application circuit.vsd Figure 2 ILD4035; Application Circuit Target Datasheet 10 Rev. 1.0, 2009-07-06 ILD4120 1200mA step down - LED controller IC Package Information 5 Package Information 0.35 x 45˚ 1.27 0.41±0.09 2) 0.2 C A-B D 8x 0.64 ±0.25 D 0.2 6 ±0.2 8˚ MAX. 0.19 +0.06 0.08 C Seating Plane C M 0.1 C D 2x 1.7 MAX. Stand Off (1.45) 0.1+0 -0.1 3.9 ±0.11) M D 8x Bottom View 8 1 5 1 4 8 4 5 2.65 ±0.2 3 ±0.2 A B 4.9 ±0.11) 0.1 C A-B 2x Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Dambar protrusion shall be maximum 0.1 mm total in excess of lead width 3) JEDEC reference MS-012 variation BA Package Outline; P/PG-DSO-8-27 0.3 8 5.2 Pin 1 marking 6.4 12 ±0.3 Figure 3 PG-DSO-8-27-PO V01 1.75 2.1 PG-DSO-8-27-TP V05 Figure 4 Tape loading Target Datasheet 11 Rev. 1.0, 2009-07-06