Datasheet

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Power Management & Multimarket

Datasheet

Revision 2.0, 2012-04-12

BCR402W

LED Driver

Summary of content (17 pages)

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LED Driver BCR402W 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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BCR402W Revision History Page or Item Subjects (major changes since previous revision) Revision 2.
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BCR402W 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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BCR402W 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 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). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Permissible Pulse Load RthJS = f(tp) . . .
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BCR402W 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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BCR402W LED Driver 1 LED Driver 1.1 Features • • • • • • • • • • LED drive current preset to 20 mA Output current adjustable up to 60 mA with an external resistor Easy paralleling of drivers to increase current Supply voltage up to 18 V High current accuracy at supply voltage variation Low voltage overhead of 1.2 V Up to 500 mW power dissipation in a small SOT343 package Negative thermal coefficient of -0.
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BCR402W LED Driver The BCR402W is a perfect fit for numerous low power LED applications by combining small form factor with low cost. These LED drivers offer several advantages to resistors like significantly higher current control at very low voltage drop ensuring high lifetime of the LEDs.
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BCR402W 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 - - 18 V Output current Iout - - 60 mA Output voltage Vout - - 18 V Reverse voltage between all terminals VR - - 0.
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BCR402W Typical characteristics 3 Typical characteristics 600 500 Ptot [mW] 400 300 200 100 0 0 20 40 60 80 TS [°C] 100 120 140 Figure 3-1 Total Power Dissipation Ptot = f(TS) RthJS [K/W] 100 D=0 D = 0.005 D = 0.01 D = 0.02 D = 0.05 D = 0.1 D = 0.2 D = 0.5 10 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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BCR402W Typical characteristics Ptotmax / PtotDC 100 D=0 D = 0.005 D = 0.01 D = 0.02 D = 0.05 D = 0.1 D = 0.2 D = 0.5 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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BCR402W Typical characteristics Iout [mA] 100 10 1 Rext = open Rext = 68 Ω 0 2 4 6 8 10 VS [V] 12 14 16 18 IS [A] Figure 3-4 Output Current versus VS Iout = f(VS), 2 LEDs load with VF = 3.8V in series, Rext = Parameter 10 -3 10 -4 10 -5 0 2 4 6 8 10 VS [V] 12 14 16 18 Figure 3-5 Supply Current versus VS IS = f(VS), 2 LEDs load with VF = 3.8V in series Datasheet 12 Revision 2.
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BCR402W Typical characteristics 60 50 Iout [mA] 40 30 20 10 0 10 100 Rext [Ω] 1000 Figure 3-6 Output Current versus Rext Iout = f(Rext), VS = 10 V, Vout = 7.6 V 10 -1 Iout [A] 10-2 10 -3 10 -4 10 -5 0.6 0.65 0.7 0.75 0.8 0.85 Vdrop [V] 0.9 0.95 1 Figure 3-7 Output Current versus Vdrop Iout = f(Vdrop), VS = 10 V, Vout = 7.6 V Datasheet 13 Revision 2.
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BCR402W Application hints 4 Application hints +V S 3 VS 4 Rex t (optional ) Vdrop Rex t GND 1 IS Iout 2 I out Figure 4-1 Application Circuit: Stand alone current source +V S 3 VS 4 I S + I out Rex t (optional ) Vdrop Rex t GND 1 IS Iout 2 I out Figure 4-2 Application Circuit: Supply voltages > 18 V Application hints BCR402W serves as an easy to use constant current source for LEDs.
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BCR402W Package 5 Package 0.9 ±0.1 2 ±0.2 0.1 MAX. 1.3 0.1 A 1 2 0.1 MIN. 0.15 1.25 ±0.1 3 2.1 ±0.1 4 0.3 +0.1 -0.05 +0.1 0.15 -0.05 +0.1 0.6 -0.05 4x 0.1 M 0.2 M A SOT343-PO V08 Figure 5-1 Package Outline for SOT343 (dimensions in mm) 1.6 0.8 0.6 1.15 0.9 SOT343-FP V08 Figure 5-2 Package Footprint for SOT343 (dimensions in mm) 0.2 2.3 8 4 Pin 1 2.15 1.1 SOT323-TP V02 Figure 5-3 Tape and Reel Information for SOT343 (dimensions in mm) Datasheet 15 Revision 2.
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BCR402W 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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