Datasheet

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Power Management & Multimarket

Datasheet

Revision 2.0, 2012-05-04

BCR320U / BCR321U

LED Driver

Summary of content (26 pages)

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LED Driver BCR320U / BCR321U Datasheet Revision 2.
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Edition 2012-05-04 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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BCR320U / BCR321U Revision History Page or Item Subjects (major changes since previous revision) Revision 2.
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BCR320U / BCR321U Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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BCR320U / BCR321U 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 3-12 Figure 3-13 Figure 3-14 Figure 3-15 Figure 3-16 Figure 3-17 Figure 3-18 Figure 3-19 Figure 3-20 Figure 3-21 Figure 3-22 Figure 3-23 Figure 4-1 Figure 4-2 Figure 5-1 Figure 5-2 Figure 5-3 Datasheet Pin configuration and typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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BCR320U / BCR321U 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Thermal Resistance at TA = 25 °C, unless otherwise specified. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical Characteristics at TA = 25 °C, unless otherwise specified . . . . . . . . . . . . . . . . . . . . . . . .
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BCR320U / BCR321U LED Driver 1 LED Driver 1.1 Features • • • • • • • • • • LED drive current preset to 10 mA Continuous output current up to 250 mA with an external resistor Easy paralleling of drivers to increase current Supply voltage up to 25 V Low side current control Digital PWM input up to 10 kHz frequency (BCR321U) Up to 1 W power dissipation in a small SC74 package Negative thermal coefficient of -0.
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BCR320U / BCR321U LED Driver Pin Configuration Typical Application +VS EN 1 6 Rex t IEN EN OUT 2 5 OUT OUT 3 4 GND Iout 1 OUT 2,3,5 Rex t 6 GND Rex t (optional ) Vdrop 4 BCR320 U Figure 1-1 Pin configuration and typical application Type Marking BCR320U 30 1 = EN 2; 3; 5 = OUT 4 = GND 6 = Rext SC74 BCR321U 31 1 = EN 2; 3; 5 = OUT 4 = GND 6 = Rext SC74 Datasheet Pin Configuration 8 Package Revision 2.
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BCR320U / BCR321U Electrical Characteristics 2 Electrical Characteristics Table 2-1 Maximum Ratings at TA = 25 °C, unless otherwise specified Parameter Symbol Values Unit Min. Typ. Max. - - 25 4.5 Enable voltage BCR320U BCR321U VEN Output current Iout - - 300 mA Output voltage Vout - - 16 V Reverse voltage between all terminals VR - - 0.
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BCR320U / BCR321U Electrical Characteristics Table 2-3 Electrical Characteristics at TA = 25 °C, unless otherwise specified (cont’d) Parameter Symbol Output current BCR320U BCR321U Output current at Rext = 3 Ω BCR320U BCR321U Iout Voltage drop (VRext) Vdrop Table 2-4 Min. Typ. Max. 9 9 10 10 11 11 - 250 250 - 0.85 0.95 1.05 Unit Note / Test Condition mA Vout = 1.4 V VEN = 12 V VEN = 3.3 V Vout > 1.4 V VEN = 12 V VEN = 3.
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BCR320U / BCR321U Typical characteristics 3 Typical characteristics 1200 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 11 Revision 2.
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BCR320U / BCR321U 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 12 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Rext = 3 Ω Rext = 4 Ω Iout [A] 0.2 Rext = 6 Ω Rext = 10 Ω 0.1 Rext = 20 Ω 0 Rext = open 0 1 2 3 4 5 6 7 Vout [V] 8 9 10 11 12 Figure 3-4 BCR320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = Parameter 0.35 0.3 Iout [A] 0.25 0.2 0.15 0.1 0.05 0 Vout = 1.4 V Vout = 5.4 V 1 10 Rext [Ω] 100 Figure 3-5 BCR320U: Output Current versus Rext Iout = f(Rext), VEN = 12 V, Vout = Parameter Datasheet 13 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.015 Iout [A] 0.01 0.005 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-6 BCR320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = open, TA = Parameter 0.06 0.05 Iout [A] 0.04 0.03 0.02 0.01 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-7 BCR320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 20 Ω, TA = Parameter Datasheet 14 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Iout [A] 0.2 0.1 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-8 BCR320U: Output Current versus Vout Iout = f(Vout), VEN = 12 V, Rext = 3 Ω, TA = Parameter 0.015 Iout [A] 0.01 0.005 0 -40 °C 25 °C 85 °C 0 5 10 15 20 25 VEN [V] Figure 3-9 BCR320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter Datasheet 15 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.06 0.05 Iout [A] 0.04 0.03 0.02 0.01 0 -40 °C 25 °C 85 °C 0 5 10 15 20 25 VEN [V] Figure 3-10 BCR320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter 0.3 Iout [A] 0.2 0.1 0 -40 °C 25 °C 85 °C 0 5 10 15 20 25 VEN [V] Figure 3-11 BCR320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter Datasheet 16 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Rext = open Rext = 20 Ω Rext = 10 Ω Rext = 6 Ω Rext = 4 Ω Rext = 3 Ω Iout [A] 0.2 0.1 0 0 5 10 15 20 25 VEN [V] Figure 3-12 BCR320U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter 3 2.5 IEN [mA] 2 1.5 1 0.5 0 -40 °C 25 °C 80 °C 0 5 10 15 20 25 VEN [V] Figure 3-13 BCR320U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter Datasheet 17 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Rext = 3 Ω Rext = 4 Ω Iout [A] 0.2 Rext = 6 Ω Rext = 10 Ω 0.1 Rext = 20 Ω 0 Rext = open 0 1 2 3 4 5 6 7 Vout [V] 8 9 10 11 12 Figure 3-14 BCR321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = Parameter 0.35 0.3 Iout [A] 0.25 0.2 0.15 0.1 0.05 0 Vout = 1.4 V Vout = 5.4 V 1 10 Rext [Ω] 100 Figure 3-15 BCR321U: Output Current versus Rext Iout = f(Rext), VEN = 3.3 V, Vout = Parameter Datasheet 18 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.015 Iout [A] 0.01 0.005 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-16 BCR321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = open, TA = Parameter 0.06 0.05 Iout [A] 0.04 0.03 0.02 0.01 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-17 BCR321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 20 Ω, TA = Parameter Datasheet 19 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Iout [A] 0.2 0.1 0 -40 °C 25 °C 85 °C 0 2 4 6 Vout [V] 8 10 12 Figure 3-18 BCR321U: Output Current versus Vout Iout = f(Vout), VEN = 3.3 V, Rext = 3 Ω, TA = Parameter 0.015 Iout [A] 0.01 0.005 0 -40 °C 25 °C 85 °C 0 1 2 3 4 5 VEN [V] Figure 3-19 BCR321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = open, TA = Parameter Datasheet 20 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.06 0.05 Iout [A] 0.04 0.03 0.02 0.01 0 -40 °C 25 °C 85 °C 0 1 2 3 4 5 VEN [V] Figure 3-20 BCR321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 20 Ω, TA = Parameter 0.3 Iout [A] 0.2 0.1 0 -40 °C 25 °C 85 °C 0 1 2 3 4 5 VEN [V] Figure 3-21 BCR321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = 3 Ω, TA = Parameter Datasheet 21 Revision 2.
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BCR320U / BCR321U Typical characteristics 0.3 Rext = open Rext = 20 Ω Rext = 10 Ω Rext = 6 Ω Rext = 4 Ω Rext = 3 Ω Iout [A] 0.2 0.1 0 0 1 2 3 VEN [V] 4 5 6 Figure 3-22 BCR321U: Output Current versus VEN Iout = f(VEN), Vout = 2 V, Rext = Parameter 4 IEN [mA] 3 2 1 0 -40 °C 25 °C 80 °C 0 0.5 1 1.5 2 2.5 3 3.5 VEN [V] 4 4.5 5 5.5 6 Figure 3-23 BCR321U: Enable Current versus VEN IEN = f(VEN), Rext = open, Iout = 0 A, TA = Parameter Datasheet 22 Revision 2.
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BCR320U / BCR321U Application hints 4 Application hints +V S µC IEN EN Iout 1 OUT 2,3,5 Rex t 6 GND Rex t (optional ) Vdrop 4 BCR321 U Figure 4-1 Application Circuit: Enabling / PWM by Micro Controller +V S EN IEN Iout 1 OUT 2,3,5 Rex t 6 GND R ex t (optional ) V drop 4 BCR320U Figure 4-2 Application Circuit: Enabling by Connecting to VS Application hints BCR320U / BCR321U serve as an easy to use constant current sources for LEDs.
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BCR320U / BCR321U 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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BCR320U / BCR321U Terminology Terminology ∆Iout/Iout Output current change hFE DC current gain IEN Enable 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 temperature TS S
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w w w . i n f i n e o n .