Datasheet

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Power Management & Multimarket

Datasheet

Revision 2.0, 2012-04-13

BCR402U

LED Driver

Summary of content (19 pages)

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LED Driver BCR402U Datasheet Revision 2.
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Edition 2012-04-13 Published by Infineon Technologies AG 81726 Munich, Germany © 2012 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.
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BCR402U Revision History Page or Item Subjects (major changes since previous revision) Revision 2.
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BCR402U Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 1.1 1.2 1.
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BCR402U List of Figures List of Figures Figure 1-1 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 3-8 Figure 3-9 Figure 3-10 Figure 3-11 Figure 4-1 Figure 4-2 Figure 5-1 Figure 5-2 Figure 5-3 Datasheet Pin configuration and typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Total Power Dissipation Ptot = f(TS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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BCR402U List of Tables List of Tables Table 2-1 Table 2-2 Table 2-3 Table 2-4 Datasheet Maximum Ratings at TA = 25 °C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal Resistance at TA = 25 °C, unless otherwise specified. . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Characteristics at TA = 25 °C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . .
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BCR402U LED Driver 1 LED Driver 1.1 Features • • • • • • • • • • LED drive current preset to 20 mA Output current adjustable up to 65 mA with an external resistor Easy paralleling of drivers to increase current Supply voltage up to 40 V High current accuracy at supply voltage variation Low voltage overhead of 1.4 V Up to 750 mW power dissipation in a small SC74 package Negative thermal coefficient of -0.
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BCR402U LED Driver Pin Configuration Typical Application +VS 4 VS Rex t (optional ) 6 GND 1 6 Rex t OUT 2 5 OUT Rex t GND OUT 3 4 Vdrop 1 OUT 2,3,5 IS Iout VS Figure 1-1 Pin configuration and typical application Type Marking BCR402U L2s Datasheet Pin Configuration 1 = GND 2; 3; 5 = OUT 4 = VS 8 Package 6 = Rext SC74 Revision 2.
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BCR402U Electrical Characteristics 2 Electrical Characteristics Table 2-1 Maximum Ratings at TA = 25 °C, unless otherwise specified Parameter Symbol Values Unit Min. Typ. Max. Supply voltage VS - - 40 V Output current Iout - - 65 mA Output voltage Vout - - 40 V Reverse voltage between all terminals VR - - 0.
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BCR402U Typical characteristics 3 Typical characteristics 1000 Ptot [mW] 800 600 400 200 0 0 20 40 60 80 TS [°C] 100 120 140 Figure 3-1 Total Power Dissipation Ptot = f(TS) RthJS [K/W] 100 10 D=0 D = 0.005 D = 0.01 D = 0.02 D = 0.05 D = 0.1 D = 0.2 D = 0.5 1 0.1 -6 10 10 -5 10 -4 -3 10 tp [s] 10 -2 10 -1 0 10 Figure 3-2 Permissible Pulse Load RthJS = f(tp) Datasheet 10 Revision 2.
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BCR402U Typical characteristics Ptotmax / PtotDC 1000 D=0 D = 0.005 D = 0.01 D = 0.02 D = 0.05 D = 0.1 D = 0.2 D = 0.5 100 10 1 10-6 10-5 10-4 10-3 tp [s] 10-2 10-1 100 Figure 3-3 Permissible Pulse Load Ptotmax / PtotDC= f(tp) Datasheet 11 Revision 2.
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BCR402U Typical characteristics Iout [mA] 100 10 1 Rext = open Rext = 75 Ω Rext = 24 Ω 0 5 10 15 20 25 VS [V] Figure 3-4 Output Current versus VS Iout = f(VS), VS - Vout = 1.4 V, Rext = Parameter 2 1.8 1.6 IS [mA] 1.4 1.2 1 0.8 0.6 0.4 80 °C 20 °C -40 °C 0.2 0 0 5 10 15 20 VS [V] 25 30 35 40 Figure 3-5 Supply Current versus VS IS = f(VS), TA = Parameter Datasheet 12 Revision 2.
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BCR402U Typical characteristics 25 Iout [mA] 20 15 10 1V 1.4 - 2 V 0 5 10 15 20 VS [V] 25 30 35 40 35 40 Figure 3-6 Output Current versus VS Iout = f(VS), VS - Vout = Parameter 25 Iout [mA] 20 15 10 5 0 -40 °C 20 °C 80 °C 0 5 10 15 20 VS [V] 25 30 Figure 3-7 Output Current versus VS Iout = f(VS), VS - Vout = 1.4 V, TA = Parameter Datasheet 13 Revision 2.
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BCR402U Typical characteristics 100 Iout [mA] -40 °C 20 °C 80 °C 10 10 100 Rext [Ω] Figure 3-8 Output Current versus Rext Iout = f(Rext), VS = 10 V, VS - Vout = 1.4 V, TA = Parameter 70 Rext = 18 Ω 60 Rext = 27 Ω Iout [mA] 50 Rext = 33 Ω 40 Rext = 56 Ω 30 Rext = 120Ω 20 Rext = open 10 0 -50 -25 0 25 50 TS [°C] 75 100 125 150 Figure 3-9 Output Current versus TS Iout = f(TS), VS = 10 V, VS - Vout = 1.4 V, Rext = Parameter Datasheet 14 Revision 2.
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BCR402U Typical characteristics 1.1 1.05 Vdrop [V] 1 0.95 0.9 0.85 typ. min., max. 0.8 10-5 10-4 10-3 10-2 IOUT [A] Figure 3-10 Reference Voltage Vdrop vs Iout Vdrop = f(Iout), Iout = 10 µA to 10 mA 1 0.95 Vdrop [V] 0.9 0.85 0.8 0.75 0.7 0.65 0.6 typ. min., max. 10 20 30 40 IOUT [mA] 50 60 70 Figure 3-11 Reference Voltage Vdrop vs Iout Vdrop = f(Iout), Iout = 10 mA to 65 mA Datasheet 15 Revision 2.
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BCR402U Application hints 4 Application hints +V S 4 VS 6 Rex t (optional ) Vdrop Rex t GND 1 OUT IS 2,3,5 I out Figure 4-1 Application Circuit: Stand alone current source +V S 4 VS 6 Rex t (optional ) Rex t GND 1 OUT Vdrop I LED 2,3,5 I out R1 R2 IS Figure 4-2 Application Circuit: Boost mode current source with external power transistor Application hints BCR402U serves as an easy to use constant current source for LEDs.
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BCR402U Package Package 2.9 ±0.2 (2.25) B 1.1 MAX. 0.15 +0.1 -0.06 5 4 1 2 3 0.35 +0.1 -0.05 Pin 1 marking 0.2 1.6 ±0.1 6 2.5 ±0.1 (0.35) 0.25 ±0.1 5 A B 6x M 0.1 MAX. 0.95 0.2 1.9 M A SC74-PO V04 Figure 5-1 Package Outline for SC74 (dimensions in mm) 2.9 1.9 0.5 0.95 SC74-FPR V04 Figure 5-2 Package Footprint for SC74 (dimensions in mm) 0.2 2.7 8 4 Pin 1 marking 3.15 1.
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BCR402U Terminology Terminology ∆Iout/Iout Output current change hFE DC current gain IEN Enable current ILED LED current Iout Output current IR Reverse current LED Light Emitting Diode PCB Printed Circuit Board Ptot Total power dissipation PWM Pulse Width Modulation RB Bias resistor Rext External resistor Rint Internal resistor RoHs Restriction of Hazardous Substance directive RthJS Thermal resistance junction to soldering point TA Ambient temperature TJ Junction temperatu
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