Datasheet

ManualsBrandsINFINEON TECHNOLOGIES ManualsPMICsPMIC - current control/management Current source SC 74 6 PG

Power Management & Multimarket

Datasheet

Revision 2.0, 2012-04-12

BCR401U

LED Driver

Summary of content (19 pages)

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LED Driver BCR401U Datasheet Revision 2.
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Edition 2012-04-12 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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BCR401U Revision History Page or Item Subjects (major changes since previous revision) Revision 2.
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BCR401U 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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BCR401U 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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BCR401U 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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BCR401U LED Driver 1 LED Driver 1.1 Features • • • • • • • • • • LED drive current preset to 10 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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BCR401U LED Driver Pin Configuration Typical Application 4 VS 6 GND 1 6 Rex t OUT 2 5 OUT 3 4 Rex t (optional ) Vdrop Rex t GND OUT +VS 1 OUT 2,3,5 IS Iout VS Figure 1-1 Pin configuration and typical application Type Marking BCR401U L1s Datasheet Pin Configuration 1 = GND 2; 3; 5 = OUT 4 = VS 8 Package 6 = Rext SC74 Revision 2.
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BCR401U 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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BCR401U 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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BCR401U 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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BCR401U Typical characteristics IOUT [mA] 100 10 1 REXT = open REXT = 100 Ω REXT = 47 Ω REXT = 33 Ω REXT = 22 Ω REXT = 18 Ω REXT = 15 Ω 0 5 10 15 20 VS [V] 25 30 35 40 35 40 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 Figure 3-5 Supply Current versus VS IS = f(VS), TA = Parameter Datasheet 12 Revision 2.
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BCR401U Typical characteristics 12 11.5 11 Iout [mA] 10.5 10 9.5 9 8.5 8 1V 1.4 - 2 V 7.5 7 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 Iout [mA] 100 10 1 -40 °C 25 °C 85 °C 150 °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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BCR401U Typical characteristics 100 Iout [mA] -40 °C 25 °C 85 °C 150 °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 Iout [mA] 70 60 Rext = 15 Ω 50 Rext = 18 Ω Rext = 22 Ω 40 Rext = 33 Ω 30 Rext = 47 Ω 20 Rext = 100Ω 10 Rext = open 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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BCR401U 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 versus 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 versus Iout Vdrop = f(Iout), Iout = 10 mA to 65 mA Datasheet 15 Revision 2.
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BCR401U 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 BCR401U serves as an easy to use constant current source for LEDs.
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BCR401U 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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BCR401U 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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