ILD4035 350 mA LED Driver ILD4035 Data Sheet Revision 1.0, 2010-11-11 RF & Protection Devices Edition 2010-11-11 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. 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ILD4035 350 mA LED Driver Revision History Page or Item Subjects (major changes since previous revision) Revision 1.0, 2010-11-11 <Revision X.Y>, <yyyy-mm-dd> Trademarks of Infineon Technologies AG AURIX™, BlueMoon™, C166™, CanPAK™, CIPOS™, CIPURSE™, COMNEON™, EconoPACK™, CoolMOS™, CoolSET™, CORECONTROL™, CROSSAVE™, DAVE™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPIM™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™, ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OmniTune™, OptiMOS™, ORIGA™, PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™, ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SMARTi™, SmartLEWIS™, SOLID FLASH™, TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™, X-GOLD™, X-PMU™, XMM™, XPOSYS™. Other Trademarks Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™, PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. 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Last Trademarks Update 2010-10-26 Data Sheet 3 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Product Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 4.1 4.2 4.3 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 12 13 13 5 5.1 5.2 5.3 5.4 Basic Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting the average LED current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dimming of the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperature Characteristics of the ILD4035 Demo Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC- Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 14 14 17 18 6 Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7 Evaluation Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8 Package Information SC74-6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Data Sheet 4 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver List of Figures List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Data Sheet Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ILD4035; Total Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ILD4035; Safe Operating Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ILD4035; Rsense Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ILD4035; Analog Voltage Dimming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ILD4035; Analog Voltage Dimming with Different Rsense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ILD4035; PWM Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 ILD4035; Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ILD4035; Evaluation- Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Tape Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver List of Tables List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Data Sheet Pin Definition and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Maximum Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 DC Characteristics at TA = 25 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 AC Characteristics at TA = 25 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 AC Characteristics, VCE = 3 V, f = 150 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Percentage of Max. LED Current vs. DC Voltage at Pin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6 Revision 1.0, 2010-11-11 350 mA LED Driver with Internal Switch ILD4035 1 • • • • • • • • • • • • • • Features Wide input voltage range: 4.5 V ... 42 V Internal switch 350 mA LED output current Over current protection Over voltage protection Reversible temperature shut down mechanism Inherent open- circuit LED protection Soft- start capability Low shut down current < 100 nA in operating voltage range Analog voltage and PWM dimming possible Typical 3% output current accuracy Very low LED current drift over temperature Minimum external components required Small Package: SC74 2 • • • • • 4 3 5 2 6 1 Applications LED Driver for general lighting applications Indoor illumination, residential lighting Outdoor illumination, street lighting Office lighting, downlights Architectural lighting Product Name Package ILD4035 SC74-6-4 Data Sheet Pin Configuration Marking 35 7 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Product Brief 3 Product Brief The ILD4035 is a hysteretic Step down LED converter IC for general lighting applications, which is capable to drive high power LEDs with currents up to 350 mA. The IC incorporates a wide input voltage range and an internal power switch. 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 voltage dimming. Depending on the value of the switching inductor the switching frequency and the voltage ripple can be set. The precise internal bandgap stabilizes the circuit and provides stable current conditions over temperature range. To ensure a long lifetime of the LED system, the ILD4035 incorporates an overvoltage and an overcurrent protection. In addition, the integrated thermal shutdown will protect the LEDs and the IC against thermal stress. ILD4035 Buck LED Converter Vs 1 Vstab Vstab 6 Isense 5 GND 4 Vswitch I/V Over Voltage Protection GND 2 TSD Vref Vstab Vstab Vstab EN/ PWM 3 Over Current Protection Pflaum ILD4035_ Block diagram.vsd Figure 1 Data Sheet Block Diagram 8 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Product Brief Pin Definition Table 1 Pin Definition and Function Pin Number Pin Symbol Function 1 Vs Supply Voltage 2 GND IC ground 3 EN / PWM Multifunctional Pin; Power On control voltage pin (PWM input) 4 Vswitch Power Switch Output 5 GND IC ground 6 Isense LED current sense pin Maximum Ratings Table 2 Maximum Ratings Parameter Symbol Limit Value Unit Supply voltage Vs 45 V Peak Output current Iout 600 mA Total Power Dissipation; Ts= 85°C Ptot 1000 mW Junction temperature TJ 125 °C Solder Temperature of GND pins TSGND 110 °C Storage temperature range TSTG -65... 150 °C VESD_HBM 4 kV 1) ESD capability all pins 1) Refer to HBM: JESD22 - A114 Thermal Resistance Table 3 Maximum Thermal Resistance Parameter Symbol Value Unit Junction - solder point RthJS 65 K/W Data Sheet 9 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Product Brief Total Power Dissipation Ptot = f (TJ) 1.2 1 Ptot (W) 0.8 0.6 0.4 0.2 0 0 20 40 60 80 100 120 140 TJ (°C) Figure 2 ILD4035; Total Power Dissipation This formula is a first estimation to calculate the Power Dissipation of the IC Ptot = 1.1 V * ILED * duty cycle + FOSC * 1μW * ILED / 350mA (1) For more precise analysis please measure TS of ILD4035 at GND pin and use Figure 2 as a reference. Safe Operating Area- Diagram 45 40 35 Vs - V LED (V) 30 47µH 68µH 100µH 150µH 220µH 330µH 25 20 15 10 5 SOA 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 Average LED current (A) Figure 3 ILD4035; Safe Operating Area This diagram shows the area of safe operation for the respective inductance values. Data Sheet 10 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Product Brief The safe area of operation consists of the minimum and maximum allowed average LED current and the resulting voltage overhead. The voltage overhead is the difference between the sum of the LED forward voltages and the supply voltage. Example Calculation 1 3 LEDs in series; ILED = 350 mA; VS = 12 V Voverhead = VS - VfLED = 12 V - 9 V = 3 V => every coil value could be used Example Calculation 2 6 LEDs in series; ILED = 250 mA; VS = 24 V Voverhead = VS - VfLED = 24 V - 18 V = 6 V => the coil values should be equal or above 100 uH If Voverhead is above the boundary of a certain coil value at wanted average LED current, the switching frequency and the associated power dissipation of the ILD4035 will increase beyond maximum ratings. Data Sheet 11 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Electrical Characteristics 4 Electrical Characteristics 4.1 DC Characteristics All voltages with respect to ground; positive; current flowing into pin; unless otherwise specified All parameters have been measured at Tamb = 25 °C, unless otherwise specified. Ven = 3 V Table 4 DC Characteristics at TA = 25 °C Parameter Symbol Values Min. Supply voltage Vs 4.5 Overall current consumption open load Isopen load 2.1 Overall current consumption open load Isopen load Overall current consumption open load Isopen load Overall standby current consumption Overall standby current consumption Temperature shut down Note / Test Condition Max. 42 V 2.7 3.5 mA Vs = 4.5 V ILED = 0 mA 2.7 3.5 4.3 mA Vs = 40 V ILED = 0 mA 2.0 8.4 13.0 mA Vs = 45 V ILED = 0 mA Isstandby 1000 nA Ven = 0 V; Vs= 12 V Isstandby 50 μA Ven = 0 V; Vs = 40 V 200 μA Ven =3 V VS = 4.5..42 V μA At any LED current °C Iout -> 0 A; value refers to TS under condition Vs = 12 V; 3 LEDs L = 100 μH; Rsense = 333 mΩ Input Current of multifunctional control IEN pin Current of Sense input Typ. Unit 140 Isense 1) TSD Th 20 85 90 95 1) This specified value corresponds to solder temperature when the IC goes into shut down mode. Operating ambient temperature depends on RthSA of the PCB. Data Sheet 12 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Electrical Characteristics 4.2 AC Characteristics All parameters have been measured at Tamb = 25 °C, unless otherwise specified. Vs = 12 V, VfLED = 3 V Rsense = 333 mΩ −> ILED = 350 mA Ven = 3 V L = 100 μH, unless otherwise specified Table 5 AC Characteristics at TA = 25 °C Parameter Symbol Values Mean current sense threshold voltage ΔVsense Min. Typ. Max. 115 118 121 Unit Note / Test Condition mV 3 LEDs in series verified by sample test Switching frequency Fsw 180 kHz 3 LEDs in series Maximum switching frequency Fswmax 500 kHz Recommended, depends on coil value Sense threshold hysteresis Vsensehys +/- 7.5 % Not subject to production test - verified by design/characteri-zation 1.1 V Internal power transistor is switched on 3 LEDs in series not subject to production test - verified by design/characteri-zation Residual voltage at collector of power VCE transistor Output current accuracy IoutaccVs +/- 3 % Temperature drift of average LED current IdriftTemp +3 % 3 LEDs in series TJ : 70 -> 110 °C not subject to production test - verified by design/characteri-zation 4.3 Digital Signals All parameters have been measured at Tamb = 25 °C, unless otherwise specified. Table 6 AC Characteristics, VCE = 3 V, f = 150 MHz Parameter Symbol Values Min. Multifunctional control pin voltage range UPon -0.3 Control voltage for power on UOn 2.2 Control voltage for power off UOff Control voltage for analog dimming Udim Data Sheet Typ. Unit Max. 42 V 42 V -0.3 0.7 V 1 2.5 V 2.5 13 Note / Test Condition Full LED current Linear dimming range Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information 5 Basic Application Information This section covers the basic information required for calculating the parameters for a certain LED application. For detailed application information please check the Application Note AN215 (Driving 1 W LEDs with ILD4035) or visit our web site http://www.infineon.com/led.appnotes 5.1 Setting the average LED current The average output current for the LEDs is set by the external sense resistor Rsense. To calculate the value of this resistor, a first approximation can be calculated using this formula. The Vsense is dependent on the supply voltage Vs and the number of LEDs in series. Rsense = Figure 4 Vsense I LED ILD4035; Rsense Calculation Example Calculation 1 Vs = 12 V, VfLED = 3 V, 3 LEDs in series => Vsense = 118 mV ILED = 350 mA => Rsense = 337 mΩ Example Calculation 2 Vs = 24 V, VfLED = 3 V, 6 LEDs in series => Vsense = 100 mV ILED = 350 mA => Rsense = 286 mΩ An easy way to achieve these resistor values is to connect standard resistors in parallel 5.2 Dimming of the LEDs Typical operating conditions All parameters have been measured at Tamb = 25 °C, unless otherwise specified. Analog voltage dimming The analog dimming characteristic graph is shown in Figure 5. To achieve a linear change in LED current versus control voltage, the recommended range of voltage at En/PWM pin 3 is from 0.8 V to 2.5 V Rsense = 333 mΩ, L= 100 μH Data Sheet 14 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Analog Dim m ing vs LED Current Vs=12V; 3 LEDs in series TA=25°C 0.4 0.35 I_LED (A) 0.3 0.25 0.2 0.15 0.1 0.05 0 0 0.5 1 1.5 2 2.5 3 Enable Voltage (V) Figure 5 ILD4035; Analog Voltage Dimming Table 7 Percentage of Max. LED Current vs. DC Voltage at Pin 3 Ven / PWM Percentage of max. LED current % Ven / PWM Percentage of max. LED current % < 0.3 0 1.9 75 0.8 10 2.2 90 1.0 25 > 2.5 100 1.4 50 Analog voltage dimming characteristics with different Rsense resistors The maximum LED current is set by Rsense. The three different graphs show the behaviour of the analog dimming. Maximum LED current will be achieved at approx. 2.3 Volts in every case. L= 100 μH ILED vs VPWM in dependency of Rsense L = 100uH 0.400 0.350 ILED (A) 0.300 0.250 Rsense=333m Rsense=600m Rsense=1200m 0.200 0.150 0.100 0.050 0.000 0.5 1 1.5 2 2.5 3 VPWM (V) ILD4035 _Analog Dimming _vs_ Rsense.vsd Figure 6 Data Sheet ILD4035; Analog Voltage Dimming with Different Rsense 15 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information PWM Dimming The EM/PWM terminal on the PCB is an input for the pulse width modulated (PWM) signal to control the dimming of the LED string. The PWM signal's logic high level should be at least 2.6 V or higher. The period of this PWM signal should be higher than 200 us. For the default demo board circuit, a dimming frequency less than 300 Hz is recommended to maintain a maximum contrast ratio of at least 100:1. The maximum contrast ratio is shown on Figure 7, and the minimum is based on the measured average LED current at 3dB below the linear reference. The maximum contrast ratio depends largely on the rise time of the inductor current, and hence is dependent on input voltage, inductor size, and LED string forward voltage. Figure 7 Data Sheet ILD4035; PWM Dimming 16 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information 5.3 Temperature Characteristics of the ILD4035 Demo Board The two charts below are related by the same supply voltage, Vs and number of LEDs. For the same Vs and number of LEDs, the "solder point temperature at the ground pin" Ts and the "ambient temperature" TA are measured at the same time. Each curve on the charts defines two areas of operation. The area below each curve defines normal operation. The area above each curve defines the triggering of internal thermal shutdown. When thermal shutdown is triggered, the LEDs start to flicker. Conditions of Measurements ILD4035 LED-Less board with BAS3010A Schottky Diode, Inductance=100uH (EPCOS 6x6mm) Rsense=0.333 Ohm Environment = Inside chamber with force convection air flow. Thermal shutdown vs. solder temperature TS Thermal shutdown vs. ambient temperature TA Thermal Shut Dow n Curve - Ambient Temperature Thermal Shut Dow n Curve - Soldering Temperature 4 LEDs 5 LEDs 3 LEDs 6 LEDs 35 35 30 30 25 25 20 20 Vs (V) Vs (V) 3 LEDs 15 4 LEDs 5 LEDs 6 LEDs 15 10 10 5 5 0 0 40 50 60 70 80 30 90 ILD4035 _TSD_over_Ts.vsd Data Sheet 40 50 60 70 80 Ta (C) Ts (C) ILD4035 _TSD_over_ Ta.vsd 17 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information 5.4 AC- Parameter Typical operating conditions All parameters have been measured at Tamb = 25 °C, unless otherwise specified. ILD4035 IC has been measured in test bench with undefined high thermal resistance This is valid for all diagramed AC- Parameters. Data Sheet 18 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 303 mΩ, L= 100 μH Vs = 24 V, 6 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs Switching Frequency (Rs=303m; L=100uH) ILED (Rs=303m; L=100uH) 4.50E+05 0.450 4.00E+05 0.425 1LED Switching Frequency (Hz) 1LED 2LED 0.400 3LED ILED (A) 0.375 4LED 5LED 0.350 6LED 7LED 0.325 8LED 9LED 0.300 10LED 11LED 2LED 3.50E+05 3LED 3.00E+05 4LED 5LED 2.50E+05 6LED 7LED 2.00E+05 8LED 9LED 1.50E+05 10LED 11LED 1.00E+05 0.275 5.00E+04 0.250 5 10 15 20 25 30 35 40 5 45 10 15 20 Vs (V) 25 30 35 40 45 Vs (V) ILD4035 _ILED_303 m_ 100u.vsd Efficiency vs. VSupply and number of LEDs ILD4035_ Switching_Frequency_303 m_ 100u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=303m; L=100uH) Duty Cycle (Rs=303m; L=100uH) 100 100% 95 90% 1LED 1LED 2LED 90 2LED 80% 3LED Duty Cycle (%) Efficiency (%) 3LED 4LED 85 5LED 80 6LED 7LED 75 8LED 9LED 70 4LED 70% 5LED 60% 6LED 7LED 50% 8LED 9LED 40% 10LED 10LED 11LED 11LED 65 30% 60 20% 5 10 15 20 25 30 35 40 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_303 m_ 100u.vsd Data Sheet 10 ILD4035 _Duty_ Cycle_303 m_ 100u.vsd 19 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 303 mΩ, L= 68 μH Vs = 24 V, 6 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=303m; L=68uH) Switching Frequency (Rs=303m; L=68uH) 0.450 4.50E+05 0.425 4.00E+05 1LED Switching Frequency (Hz) 1LED 2LED 0.400 3LED 4LED ILED (A) 0.375 5LED 0.350 6LED 7LED 0.325 8LED 9LED 0.300 10LED 11LED 0.275 2LED 3.50E+05 3LED 4LED 3.00E+05 5LED 2.50E+05 6LED 7LED 2.00E+05 8LED 9LED 1.50E+05 10LED 11LED 1.00E+05 0.250 5.00E+04 5 10 15 20 25 30 35 40 45 5 10 15 20 Vs (V) ILD4035 _ILED_303 m_68u.vsd Efficiency vs. VSupply and number of LEDs 30 35 40 45 ILD4035 _Switching_Frequency_303 m_68u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=303m; L=68uH) Duty Cycle (Rs=303m; L=68uH) 100 100% 95 90% 1LED 2LED 90 3LED 4LED 85 5LED 6LED 7LED 80 8LED 9LED 75 2LED 3LED 4LED 70% 5LED 6LED 7LED 60% 8LED 9LED 50% 10LED 11LED 70 1LED 80% Duty Cycle (%) Efficiency (%) 25 Vs (V) 10LED 11LED 40% 65 30% 5 10 15 20 25 30 35 40 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_303 m_68u.vsd Data Sheet 10 ILD4035 _Duty_Cycle_303 m_68u.vsd 20 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 303 mΩ, L= 220 μH Vs = 24 V, 6 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=303m; L=220uH) Switching Frequency (Rs=303m; L=220uH) 0.450 4.50E+05 0.425 4.00E+05 1LED Switching Frequency (Hz) 1LED 2LED 0.400 3LED 4LED ILED (A) 0.375 5LED 0.350 6LED 7LED 0.325 8LED 9LED 0.300 10LED 11LED 0.275 2LED 3.50E+05 3LED 4LED 3.00E+05 5LED 2.50E+05 6LED 7LED 2.00E+05 8LED 9LED 1.50E+05 10LED 11LED 1.00E+05 0.250 5.00E+04 5 10 15 20 25 30 35 40 45 5 10 15 20 Vs (V) ILD4035 _ILED_303 m_ 220u.vsd Efficiency vs. VSupply and number of LEDs 30 35 40 45 ILD4035_ Switching_Frequency_303 m_ 220u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=303m; L=220uH) Duty Cycle (Rs=303m; L=220uH) 100 100% 90% 95 1LED 2LED Duty Cycle (%) 3LED 85 4LED 5LED 80 6LED 7LED 75 8LED 9LED 70 1LED 80% 2LED 90 Efficiency (%) 25 Vs (V) 10LED 11LED 70% 3LED 4LED 60% 5LED 6LED 50% 7LED 40% 8LED 30% 10LED 9LED 11LED 65 20% 60 5 10 15 20 25 30 35 40 10% 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_303 m_ 220u.vsd Data Sheet 10 ILD4035 _Duty_ Cycle_303 m_ 220u.vsd 21 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 303 mΩ, L= 47 μH Vs = 24 V, 6 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=303m; L=47uH) Switching Frequency (Rs=303m; L=47uH) 0.450 4.50E+05 0.425 2LED 3LED ILED (A) 0.375 4LED 5LED 0.350 6LED 7LED 0.325 8LED 9LED 0.300 10LED Switching Frequency (Hz) 4.00E+05 1LED 0.400 11LED 0.275 1LED 3.50E+05 2LED 3LED 3.00E+05 4LED 5LED 6LED 2.50E+05 7LED 8LED 2.00E+05 9LED 10LED 1.50E+05 0.250 11LED 1.00E+05 5 10 15 20 25 30 35 40 45 5 10 15 20 Vs (V) ILD4035 _ILED_303 m_47u.vsd Efficiency vs. VSupply and number of LEDs 30 35 40 45 ILD4035 _Switching_Frequency_303 m_47u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=303m; L=47uH) Duty Cycle (Rs=303m; L=47uH) 100 100% 95 1LED 1LED 90% 2LED 90 2LED 3LED 3LED Duty Cycle (%) Efficiency (%) 25 Vs (V) 4LED 85 5LED 6LED 7LED 80 8LED 9LED 75 10LED 5LED 6LED 7LED 70% 8LED 9LED 10LED 60% 11LED 70 4LED 80% 65 11LED 50% 5 10 15 20 25 30 35 40 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_303 m_47u.vsd Data Sheet 10 ILD4035 _Duty_Cycle_303 m_47u.vsd 22 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 367 mΩ, L= 100 μH Vs = 24 V, 6 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=367m; L=100uH) Switching Frequency (Rs=367m; L=100uH) 0.400 5.00E+05 4.50E+05 0.375 Switching Frequency (Hz) 1LED 2LED 0.350 3LED 4LED ILED (A) 0.325 5LED 0.300 6LED 7LED 0.275 8LED 9LED 0.250 10LED 11LED 0.225 1LED 4.00E+05 2LED 3.50E+05 3LED 3.00E+05 5LED 4LED 6LED 2.50E+05 7LED 8LED 2.00E+05 9LED 10LED 1.50E+05 11LED 1.00E+05 5.00E+04 0.200 5 10 15 20 25 30 35 40 5 45 10 15 20 ILD4035 _ILED_367 m_ 100u.vsd Efficiency vs. VSupply and number of LEDs 30 35 40 45 ILD4035_ Switching_Frequency_367 m_ 100u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=367m; L=100uH) Duty Cycle (Rs=367m; L=100uH) 100% 100 90% 95 1LED 1LED 2LED 90 2LED 80% 3LED 3LED Duty Cycle (%) Efficiency (%) 25 Vs (V) Vs (V) 4LED 85 5LED 6LED 7LED 80 8LED 9LED 75 70% 4LED 5LED 60% 6LED 7LED 50% 8LED 9LED 40% 10LED 10LED 11LED 70 11LED 30% 65 20% 5 10 15 20 25 30 35 40 5 45 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_367 m_ 100u.vsd Data Sheet 10 ILD4035 _Duty_ Cycle_367 m_ 100u.vsd 23 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 367 mΩ, L= 68 μH Vs = 12 V, 3 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=367m; L=68uH) Switching Frequency (Rs=367m; L=68uH) 0.400 5.00E+05 0.375 4.50E+05 1LED Switching Frequency (Hz) 1LED 2LED 0.350 3LED ILED (A) 0.325 4LED 5LED 0.300 6LED 7LED 0.275 8LED 9LED 0.250 10LED 11LED 0.225 2LED 4.00E+05 3LED 3.50E+05 4LED 5LED 3.00E+05 6LED 7LED 2.50E+05 8LED 9LED 2.00E+05 10LED 11LED 1.50E+05 0.200 1.00E+05 5 10 15 20 25 30 35 40 45 5 10 15 20 Vs (V) ILD4035 _ILED_367 m_68u.vsd Efficiency vs. VSupply and number of LEDs 30 35 40 45 ILD4035 _Switching_Frequency_367 m_68u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=367m; L=68uH) Duty Cycle (Rs=367m; L=68uH) 100 100% 95 90% 1LED 2LED 90 3LED 4LED 85 5LED 6LED 7LED 80 8LED 9LED 75 2LED 3LED 4LED 70% 5LED 6LED 7LED 60% 8LED 9LED 50% 10LED 11LED 70 1LED 80% Duty Cycle (%) Efficiency (%) 25 Vs (V) 10LED 11LED 40% 65 30% 5 10 15 20 25 30 35 40 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_367 m_68u.vsd Data Sheet 10 ILD4035 _Duty_Cycle_367 m_68u.vsd 24 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 367 mΩ, L= 220 μH Vs = 12 V, 3 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=367m; L=220uH) Switching Frequency (Rs=367m; L=220uH) 0.375 5.00E+05 4.50E+05 0.350 Switching Frequency (Hz) 1LED 2LED 3LED ILED (A) 0.325 4LED 5LED 0.300 6LED 7LED 8LED 0.275 9LED 10LED 11LED 0.250 1LED 4.00E+05 2LED 3LED 3.50E+05 4LED 5LED 3.00E+05 6LED 2.50E+05 7LED 8LED 2.00E+05 9LED 10LED 1.50E+05 11LED 1.00E+05 0.225 5.00E+04 5 10 15 20 25 30 35 40 45 5 10 15 20 Vs (V) 30 35 40 45 ILD4035_ Switching_Frequency_367 m_ 220u.vsd ILD4035 _ILED_367 m_ 220u.vsd Efficiency vs. VSupply and number of LEDs Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=367m; L=220uH) Duty Cycle (Rs=367m; L=220uH) 100 100% 90% 95 1LED Duty Cycle (%) 3LED 4LED 85 5LED 80 6LED 7LED 75 8LED 9LED 70 1LED 80% 2LED 90 Efficiency (%) 25 Vs (V) 10LED 2LED 3LED 70% 4LED 5LED 60% 6LED 50% 7LED 8LED 40% 9LED 10LED 30% 11LED 65 11LED 20% 60 10% 5 10 15 20 25 30 35 40 45 5 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_367 m_ 220u.vsd Data Sheet 10 ILD4035 _Duty_ Cycle_367 m_ 220u.vsd 25 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Basic Application Information Rsense = 367 mΩ, L= 47 μH Vs = 12 V, 3 LED with typ. VF = 3 V ILED vs. VSupply and number of LEDs FSwitch vs. VSupply and number of LEDs ILED (Rs=367m; L=47uH) Switching Frequency (Rs=367m; L=47uH) 5.00E+05 0.400 0.375 4.50E+05 Switching Frequency (Hz) 1LED 2LED 0.350 3LED 4LED ILED (A) 0.325 5LED 0.300 6LED 7LED 0.275 8LED 9LED 0.250 10LED 11LED 1LED 2LED 4.00E+05 3LED 4LED 3.50E+05 5LED 6LED 7LED 3.00E+05 8LED 9LED 2.50E+05 10LED 11LED 2.00E+05 0.225 0.200 1.50E+05 5 10 15 20 25 30 35 40 5 45 10 15 20 25 30 35 40 45 Vs (V) Vs (V) ILD4035 _ILED_367 m_47u.vsd Efficiency vs. VSupply and number of LEDs ILD4035 _Switching_Frequency_367 m_47u.vsd Duty Cycle vs. VSupply and number of LEDs Efficiency (Rs=367m; L=47uH) Duty Cycle (Rs=367m; L=47uH) 100 100% 95 90% 1LED 1LED 2LED 3LED 90 Duty Cycle (%) Efficiency (%) 2LED 4LED 5LED 85 6LED 7LED 8LED 80 9LED 3LED 80% 4LED 5LED 70% 6LED 7LED 8LED 60% 9LED 10LED 10LED 50% 11LED 75 70 11LED 40% 5 10 15 20 25 30 35 40 5 45 Vs (V) 15 20 25 30 35 40 45 Vs (V) ILD4035 _Efficiency_367 m_47u.vsd Data Sheet 10 ILD4035 _Duty_Cycle_367 m_47u.vsd 26 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Application Circuit 6 Application Circuit Rsense Vs 1 Vstab 2 6 Vref I/V TSD Vref Vstab 5 Vstab Vstab EN / PWM 3 4 ILD4035 Pflaum ILD4035_Application circuit.vsd Figure 8 Data Sheet ILD4035; Application Circuit 27 Revision 1.0, 2010-11-11 ILD4035 350 mA LED Driver Evaluation Board 7 Evaluation Board ILD4035 _Eval_Board .vsd Figure 9 ILD4035; Evaluation- Board 8 Package Information SC74-6-4 1.1 MAX. B 5 4 1 2 3 0.35+0.1 -0.05 0.2M B 6x 0.95 0.15+0.1 -0.06 1.6±0.1 6 2.5±0.1 (0.35) 10˚ MAX. 0.1 MAX. 0.25±0.1 10˚ MAX. 2.9±0.2 (2.25) A 0.2M A 1.9 GPX09300 Figure 10 Package Outline 0.2 2.7 8 4 Pin 1 marking 3.15 1.15 CPWG5899 Figure 11 Data Sheet Tape Dimensions 28 Revision 1.0, 2010-11-11 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG