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| BCR320U / BCR321U LED Driver Features * Continuous output current up to 250mA with external resistor * Supply voltage up to 24V * Digital PWM input up to 10kHz frequency (BCR321U) * Up to 1W power dissipation in a small SC74 package * Negative thermal coefficient reduces output current at higher temperatures * Easy paralleling of drivers to increase current * PB-free (RoHS compliant) package * Automotive qualified according to AEC Q101 Applications * Architectural LED lighting * Channel letters for advertising, LED strips for decorative lighting * Retail lighting in fridge, freezer case and vending machines * Emergency lighting (e.g. steps lighting, exit way signs etc.) 5 6 1 4 2 3 General Description The BCR320U/BCR321U provide a low-cost solution for driving 0.5W LEDs with a typical LED current ILED of 150mA to 200mA. Internal breakdown voltage is >16V, this is the maximum voltage that the LED driver IC can sustain when the ouput is directly connected to supply voltage. The BCR320U/BCR321U can be operated at supply voltages of 16V or higher, by regarding the voltage drop of the LED load, which reduces the supply voltage to the maximum output voltage of the driver. The enable pin (BCR320) can withstand a maximum voltage of 25 V, which can also be increased by stacking a series in front of the LED drivers, resulting in a certain voltage drop of the LEDs, reducing the voltage at the enable pin below 25V. A digital input pin (BCR321U) allows dimming via a Microcontroller with frequencies of up to 10 kHz. A reduction of the output current at higher temperatures is the result of the negative temperature coefficient of 0.2 %/K. of the LED drivers. With no need for additional external components like inductors, capacitors and free wheeling diodes, the BCR320U/BCR321U LED drivers are a cost-efficient and PCB-area saving solution for driving 0.5W LEDs. 1 2010-01-15 BCR320U / BCR321U Pin Configuration Typical Application +Vs 6 5 4 C EN IEN IOUT 1 OUT 2,3,5 1 2 3 Rext 6 Vdrop GND 4 BCR321U Type BCR320U BCR321U Maximum Ratings Parameter Enable voltage BCR320U BCR321U Output current Output voltage Marking 30 31 1 = EN Pin Configuration 2;3;5 = OUT 4 = GND 6 = Rext Package SC74 SC74 Symbol Value 25 4.5 Unit V VEN Iout Vout VR Ptot Tj Tstg 300 16 0.5 1000 150 -65 ... 150 mA V mW C Reverse voltage between all terminals Total power dissipation, TS = 102 C Junction temperature Storage temperature Thermal Resistance Parameter Junction - soldering point1) Symbol Value 50 Unit K/W RthJS 1For calculation of R thJA please refer to Application Note Thermal Resistance 2 2010-01-15 BCR320U / BCR321U Electrical Characteristics at TA=25C, unless otherwise specified Parameter Characteristics Collector-emitter breakdown voltage Symbol min. Values typ. max. V mA 1.2 1.2 350 90 500 105 k 10 1.5 10 10 250 250 0.95 mA 8 8 12 12 1.05 V Unit VBR(CEO) IEN 16 IC = 1 mA, I B = 0 Enable current VEN = 12 , BCR320U VEN = 3.3 , BCR321U DC current gain hFE Rint RB 200 65 IC = 50 mA, VCE = 1 V Internal resistor IRint = 10 mA Bias resistor BCR320U BCR321U Output current Iout Vout = 1.4 V, V EN = 12 V, BCR320U Vout = 1.4 V, V EN = 3.3 V, BCR321U Vout = 1.4 V, V EN = 12 V, REXT = 3 , BCR320U Vout = 1.4 V, V EN = 3.3 , R EXT = 3 , BCR321U Voltage drop (VRext) Vdrop 0.85 IC = 10 mA DC Characteristics with stabilized LED load Lowest sufficient supply voltage overhead VSmin Iout/Iout - 1.4 - V %/K Iout > 18mA Output current change versus TA VEN = 12 V; Vout > 2.0 V, BCR320U VEN = 3.3 V; Vout > 2.0 V, BCR321U Output current change versus VS Iout/Iout 3 -0.2 -0.2 1 1 %/V 2010-01-15 VEN = 12 V; Vout > 2.0 V, BCR320U VEN = 3.3 V; Vout > 2.0 V, BCR321U BCR320U / BCR321U Total power dissipation P tot = f (TS) Permissible Pulse Load RthJS = f (tp) 1200 10 3 mW 1000 900 10 2 Ptot 800 700 600 500 400 300 200 100 0 0 20 40 60 80 100 120 C 150 R thJS 10 1 10 0 D = 0,5 0,2 0,1 0,05 0,02 0,01 0,005 0 10 -1 -6 10 10 -5 10 -4 10 -3 10 -2 s 10 0 TS TP Permissible Pulse Load Ptotmax / PtotDC = f (tp) 10 3 - Ptotmax/PtotDC 10 2 10 1 D=0 0.005 0.01 0.02 0.05 0.1 0.2 0.5 10 0 -6 10 10 -5 10 -4 10 -3 10 -2 s 10 0 TP 4 2010-01-15 BCR320U / BCR321U BCR320U: Output current versus V out BCR320U: Output current versus Rext Iout = f (V out ); VEN = 12 V; Rext = Parameter 0.3 Rext = 3 Ohm Iout = f (R ext ); VEN = 12 V; Vout = Parameter 0.26 A 0.22 0.2 Vout = 5.4V Vout = 1.4V Rext = 4 Ohm A 0.18 Iout Iout Rext = 6 Ohm Rext = 10 Ohm 0.16 0.14 0.12 0.1 0.08 0.1 Rext = 20 Ohm 0.06 0.04 Rext = open 0.02 12 00 10 10 1 0 0 2 4 6 8 V Ohm 10 2 Vout Rext. BCR320U: Output current versus V out BCR320U: Output current versus V out Iout = f (V S ); V EN = 12 V; Rext = open; TA= Parameter 0.02 Iout = f (V S ); V EN = 12 V; Rext = 20 Ohm; TA= Parameter 0.1 A A TA = -40C TA = 25C TA = 85C 0.08 0.07 Iout Iout TA = -40C TA = 25C TA = 85C 0.06 0.05 0.04 0.03 0.01 0.005 0.02 0.01 0 0 0 0 2 4 6 8 V 12 2 4 6 8 V 12 Vout Vout 5 2010-01-15 BCR320U / BCR321U BCR320U: Output current versus V out BCR320U: Output current versus V EN Iout = f (V S ); V EN = 12 V; Rext = 3 Ohm; TA= Parameter 0.5 Iout = f (VEN); Vout = 2.0 V; Rext = open; TA = Parameter 0.02 A TA = 25C TA = -40C TA = 85C A Iout 0.3 Iout TA = -40C TA = 25C TA = 85C 0.01 0.2 0.005 0.1 0 0 2 4 6 8 V 12 0 0 5 10 15 V 25 Vout VEN BCR320U: Output current versus V EN BCR320U: Output current versus V EN Iout = f (VEN); Vout = 2.0 V; Rext = 20 Ohm; TA = Parameter 0.06 Iout = f (VEN); Vout = 2.0 V; Rext = 3 Ohm; TA = Parameter 0.3 A A Iout 0.03 TA = -40C TA = 25C TA = 85C Iout 0.04 TA = 85C TA = 25C TA = -40C 0.1 0.02 0.01 0 0 5 10 15 V 25 0 0 5 10 15 V 25 VEN VEN 6 2010-01-15 BCR320U / BCR321U BCR320U: Output current versus V EN BCR320U: Enable current versus VEN Iout = f (VEN); Vout = 2.0 V; Rext = Parameter 0.3 Rext = 3 Ohm IEN = f (V EN ); Rext = open; Iout = 0; TA = Parameter 3 mA A Rext = 4 Ohm Rext = 6 Ohm IEN Iout 2 TA = 80C TA = 25C TA = -40C 1.5 0.1 Rext = 10 Ohm 1 Rext = 20 Ohm 0.5 Rext = open 0 0 5 10 15 V 25 0 0 5 10 15 V 25 VEN VEN BCR321U: Output current versus V out BCR321U: Output current versus Rext Iout = f (V out); VEN = 3.3 V; Rext = Parameter 0.3 Rext = 3 Ohm Iout = f (R ext); V EN = 3.3 V; Vout = Parameter 0.4 A A Rext = 4 Ohm Vout = 5.4V Vout = 1.4V Iout Rext = 6 Ohm Iout 0.2 0.1 Rext = 10 Ohm Rext = 20 Ohm 0.1 Rext = open 0 0 2 4 6 8 V 12 00 10 10 1 Ohm 10 2 Vout Rext. 7 2010-01-15 BCR320U / BCR321U BCR321U: Output current versus V out BCR321U: Output current versus V out Iout = f (V S ); V EN = 3.3 V; Rext = open; TA= Parameter 0.015 Iout = f (V S ); V EN = 3.3 V; Rext = 20 Ohm; TA= Parameter 0.06 TA = -40C TA = 25C TA = 85C A A Iout Iout TA = -40C TA = 25C TA = 85C 0.005 0.02 0 0 2 4 6 8 V 12 0 0 2 4 6 8 V 12 Vout Vout BCR321U: Output current versus V out BCR321U: Output current versus V EN Iout = f (V S ); V EN = 3.3 V; Rext = 3 Ohm; TA= Parameter 0.3 Iout = f (VEN); Vout = 2.0 V; Rext = open; TA = Parameter 0.02 A A TA = -40C TA = 25C TA = 85C Iout TA = 25C TA = 85C TA = -40C 0.1 Iout 0.01 0.005 0 0 V 2 4 6 8 12 0 0 1 2 3 V 5 Vout VEN 8 2010-01-15 BCR320U / BCR321U BCR321U: Output current versus V EN BCR321U: Output current versus V EN Iout = f (VEN); Vout = 2.0 V; Rext = 20 Ohm; TA = Parameter 0.06 Iout = f (VEN); Vout = 2.0 V; Rext = 3 Ohm; TA = Parameter 0.3 A A Iout 0.03 TA = -40C TA = 25C TA = 85C 0.1 Iout 0.04 0.02 TA = 85C TA = 25C TA = -40C 0.01 0 0 1 2 3 V 5 0 0 1 2 3 V 5 VEN VEN BCR321U: Output current versus V EN BCR321U: Enable current versus VEN Iout = f (VEN); VS = 3.3 V; Rext = Parameter 0.3 Rext = 3 Ohm IEN = f (V EN); Rext = open; Iout = 0; TA = Parameter 4 TA = 80C TA = 25C TA = -40C mA Rext = 4 Ohm A Rext = 6 Ohm IEN 2 Rext = 10 Ohm Iout 0.1 Rext = 20 Ohm 1 Rext = open 0 0 1 2 3 4 V 6 0 0 1 2 3 4 V 6 VEN VEN 9 2010-01-15 BCR320U / BCR321U Application circuit: Enabling / PWM by micro controller +Vs Application circuit: Enabling by connecting to Vs +Vs C IOUT IEN EN 1 OUT 2,3,5 EN IEN IOUT OUT 2,3,5 Rext Rext 6 Vdrop GND 6 Vdrop GND 4 BCR321U BCR320U 4 Application hints BCR320U / BCR321U serve as an easy to use constant current sources for LEDs. In stand alone application an external resistor can be connected to adjust the current from 10 mA to 250 mA. Rext can be determined by using the diagram 'Output current versus external resistor'. Please take into account that the resulting output currents will be slightly lower due to the self heating of the component and the negative thermal coefficient. Please visit our web site for application notes: www.infineon.com/lowcostleddriver for up-to-date application information 10 2010-01-15 Package SC74 BCR320U / BCR321U Package Outline 2.9 0.2 (2.25) B (0.35) 2.5 0.1 6 5 4 1.1 MAX. 0.15 +0.1 -0.06 0.25 0.1 1.6 0.1 10 MAX. 1 2 3 Pin 1 marking 1.9 0.35 +0.1 -0.05 0.95 10 MAX. 0.2 M B 6x 0.2 M A 0.1 MAX. A Foot Print 0.5 0.95 Marking Layout (Example) Small variations in positioning of Date code, Type code and Manufacture are possible. 1.9 2.9 Manufacturer 2005, June Date code (Year/Month) Pin 1 marking Laser marking BCW66H Type code Standard Packing Reel o180 mm = 3.000 Pieces/Reel Reel o330 mm = 10.000 Pieces/Reel For symmetric types no defined Pin 1 orientation in reel. 4 0.2 Pin 1 marking 3.15 2.7 8 1.15 11 2010-01-15 BCR320U / BCR321U Edition 2009-11-16 Published by Infineon Technologies AG 81726 Munich, Germany 2009 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. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office ( Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. 12 2010-01-15 |
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