Datasheet

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LED Driver IC

BCR450

Datasheet, Rev. 3.1, Feb. 2013

Power Management and

Multimarket

Summary of content (16 pages)

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Datasheet, Rev. 3.1, Feb.
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Edition 2013-02-21 Published by Infineon Technologies AG, 81726 München, Germany © Infineon Technologies AG 2013. 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.
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BCR450 LED Driver IC BCR450, LED Driver IC Revision History: 2013-02-21, Rev. 3.1 Previous Version: 2009-10-15, Rev. 3.0 Page Subjects (major changes since last revision) Figure 1 Block diagram: Pin 3 (EN), ESD protection and base resistor added Table 5 Note 1) added to Enable voltage range Table 6 Typical input capacitance of pin 3 (EN) added Figure 5 Units added to figure title Figure 6 Units added to figure title Datasheet 3 Rev. 3.
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BCR450 LED Driver IC BCR450 Power LED Driver IC 1 BCR450 Power LED Driver IC Features • Low voltage drop across sense resistor, 0.15 V typical • High output current precision • Operating voltage fro 8 to 27 V • Over voltage protection • Overtemperature current foldback and Thermal shut down function • Adjustable Constant LED Current up to 85 mA in stand alone operation • Precise Internal bandgap enables High output current accuracy • Up to 2.
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BCR450 LED Driver IC Description LED Controller BCR450 Iout 1 GND 2 Output stage EN Vref OP 6 Vs 5 GND Bandgap 4 Vsense 3 BCR450_ Block diagram.
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BCR450 LED Driver IC Description AC Measurement S1 = S2 ~ 150 mV S3 Source 4 Vs Vsense - S4 S5 = = S6 5V= Source 2 S9 Vref R1 EN = Source 1 IOut + Source 5 PWM S8 S7 Source 3 = GND R2 Vout BCR450_Test circuit.
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BCR450 LED Driver IC Electrical Characteristics 3 Electrical Characteristics 3.1 DC Characteristics 8 V < VS < 27 V; - 40 °C < TJ < 150 °C, all voltages with respect to ground; current directions as given in Figure 2; unless otherwise specified All parameters are tested at 25 °C, unless otherwise specified Table 5 DC Characteristics Parameter Symbol Values Min. Typ. 70 90 Unit Note / Test Condition mA Is short; Vs = 8..27 V Vsense = 20 mV Is short; Vs = 42 V Vsense = 20 mV Max.
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BCR450 LED Driver IC Electrical Characteristics 3.2 Digital Signals All parameters are tested at 25 °C, unless otherwise specified Table 6 Digital Control Parameter (EN) Parameter Symbol PWM signal frequency fPWM Values Min. Typ. Unit Note / Test Condition Hz tdutycycle = 1%; Max. 1000 signal level reaches 100% in on and off mode PWM Duty cycle tdutyPWM PWM voltage UPWM EN input capacitance to GND CEN 3.
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BCR450 LED Driver IC Measured Parameters 4 Measured Parameters BCR450 IC has been measured in test bench with undefined high thermal resistance This is valid for all diagramed DC- and AC- Parameters 4.1 DC- Parameter Vout = 1.0 V, EN = 2.4 V IS vers Temperature (VS); Vsense = 20 mV IS vers Vs (Temperature); Vsense = 20 mV I_s_vers Temp; Vs V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V I_s_vers Vs; Temp V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V 120.00 105.00 -40°C 100.00 95.00 0°C Vs_8V 90.
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BCR450 LED Driver IC Measured Parameters Isense vers Temperature (VS); Vsense = 20 mV Isense vers Vs (Temperature); Vsense = 20 mV I_sense_vers Vs; Temp V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V 145.00 145.00 140.00 140.00 135.00 135.00 Vs_8V 130.00 Isense (nA) Isense (nA) I_sense_vers Temp; Vs V_sense = 20 mV; V_out = 1 V; V_en = 2.4 V Vs_14V 125.00 Vs_27V 120.00 Vs_40V 115.00 Vs_42V 25°C 45°C 120.00 65°C 115.00 85°C 105.00 105.00 100.00 100.
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BCR450 LED Driver IC Measured Parameters Vs = 14 V, Vout = 6 V; EN = 20 mV Iout vers EN (Temperature) I_out_vers V_en; Temp V_sense = 20 mV; V_out = 6 V; V_s = 14 V 100.00 -40°C 90.00 -25°C 0°C Iout (mA) 80.00 25°C 70.00 45°C 65°C 60.00 85°C 50.00 105°C 125°C 40.00 150°C 30.00 0 0.2 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 5 Ven (V) Iout vers Ven_Vsense20mV_Vs14V_Vout6V.vsd Vs = 14 V, Vsense = 20 mV; EN = 2.
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BCR450 LED Driver IC Measured Parameters Vout = 6 V, Vsense = 20 mV; EN = 2.4 V Is vers VS (Temperature) Is vers VS (Temperature) I_s_vers Vs; Temp V_sense = 20 mV; V_out = 6 V; V_en = 2.4 V I_s_vers Vs; Temp V_sense = 20 mV; V_out = 6 V; V_en = 2.4 V 100.00 120.00 -40°C 90.00 80.00 -25°C 0°C 70.00 25°C 60.00 45°C 0°C 25°C 45°C 60.00 65°C 85°C 40.00 65°C 50.00 -25°C 80.00 Is (mA) Is (mA) 100.00 -40°C 105°C 85°C 150°C 125°C 30.00 0.00 150°C 6 6.8 7.6 8.4 9.
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BCR450 LED Driver IC Measured Parameters Vout = 6 V, Iout = 15 mA; EN = 2.4 V Vsense vers VS (Temperature) Vsense_vers Vs; Temp Iout = 15 mA; V_out = 6 V; V_en = 2.4 V 155.00 Vsense (mV) 150.00 145.00 Vs=8V 140.00 Vs=14V Vs=27V 135.00 130.00 125.00 -40 -25 0 25 45 65 85 105 125 150 °C Vsense vers Vs_Temp_Iout15mA_Vout6V.
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BCR450 LED Driver IC Measured Parameters EN = 2.4 V Vdrop vers Iout Vs typ. Vdrop 6 Internal Transistor 5 Vdrop 4 Vdrop (V) BCR450 3 2 Vout 1 0 0 10 20 30 40 50 60 70 80 90 Iout (mA) BCR450 _Vdrop _Schematic.vsd 4.2 Vdrop .vsd AC- Parameter Response Time Ton & Toff; Vs= 12 V; fPulse= 1 kHz; tduty= 50 % BCR450_Response-Time.vsd Datasheet 14 Rev. 3.
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BCR450 LED Driver IC Evaluation Board 5 Evaluation Board The evaluation board is designed to test the BCR450 as a stand alone device for lower LED current applications and also with additional external “booster“ transistors for high current, high brightness LEDs. Up to three external transistors BCX68 or BC817SU each could be used on the PCB to minimize thermal problems.
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BCR450 LED Driver IC Package Information Via 1.3 mm 0.5 mm Drill TOP- Layer CU 70 um FR4 1.0 mm BOTTOM- Layer CU 70 um Cross section of application board.vsd Figure 4 Cross section of evaluation board 6 Package Information 1.1 MAX. B 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 5 2.5±0.1 6 10˚ MAX. 0.1 MAX. (0.35) 0.25±0.1 10˚ MAX. 2.9±0.2 (2.25) A 0.2M A 1.9 GPX09300 Figure 5 Package outline; SC74 (dimensions in mm) 0.2 2.7 8 4 Pin 1 marking 3.15 1.