BCR421U Infineon Technologies, BCR421U Datasheet
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BCR421U
Specifications of BCR421U
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BCR421U Summary of contents
Page 1
... LEDs in front of the LED drivers, resulting in a certain voltage drop depending on the forward voltages of the LEDs, reducing the voltage at the supply pin of the driver below 40V. A digital input pin (BCR421U) allows dimming via a Microcontroller with frequencies kHz. A reduction of the output current at higher temperatures is the result of the negative thermal coefficient of 0 ...
Page 2
... Application Note Thermal Resistance thJA Typical Application +Vs 4 µC 3 Pin Configuration 2;3;5 = OUT Symbol out V out 100 °C tot stg Symbol R thJS 2 BCR420U / BCR421U OUT EN 1 OUT 2,3,5 Rext 6 GND 4 BCR421U Package 4 = GND SC74 ext SC74 Value 40 4.5 200 38 0.5 1000 150 -65 ... 150 Value 50 ...
Page 3
... Electrical Characteristics at T Parameter Characteristics Collector-emitter breakdown voltage mA Enable current BCR420U 3 BCR421U EN DC current gain mA Internal resistor Rint Bias resistor BCR420U BCR421U Output current BCR420U out 1 3.3 V, BCR421U out EN V > 2 out EN BCR420U V > out EN BCR421U Voltage drop ( 10mA ...
Page 4
... Permissible Pulse Load totmax totDC Permissible Pulse Load R tot 100 120 °C 150 0.005 0.01 0.02 0.05 0.1 0.2 0 BCR420U / BCR421U = thJS 2010-01- 0,5 0,2 0,1 0,05 0,02 0,01 0,005 ...
Page 5
... BCR420U: Output current versus R out out V = Parameter out 0.2 A 0.1 0. out BCR320U: Output current versus V out = open ext out T = Parameter A 0.08 A 0.04 0. out 5 BCR420U / BCR421U ); ext EN out Vout = 5.4V Vout = 1. Ohm ext TA = -40° 25° 85° 2010-01-15 ext 2 Ohm 10 R ext. out ...
Page 6
... Ohm; ext out T = Parameter A 0. -40° 25° 85°C 0.005 out BCR420U: Output current versus Ohm ext out T = Parameter A 0. -40° 25° 85°C 0. BCR420U / BCR421U ); open; EN out ext TA = -40° 25° 85° 2 Ohm; EN out ext TA = 85° 25° -40° 2010-01- ...
Page 7
... BCR420U: Output current versus 2.0 V; out EN out R = Parameter ext 0.15 Rext = 6 Ohm Rext = 8 Ohm A Rext = 10 Ohm 0.05 Rext = 30 Ohm Rext = 60 Ohm Rext = open BCR421U: Output current versus 3.3 V; out out Parameter ext 0 BCR420U: Enable current versus Parameter BCR421U: Output current versus R ...
Page 8
... TA = -40°C 0. 25° 85° BCR421U: Output current versus V out open; ext out T = Parameter A 0. -40° 25° 85° out BCR421U: Output current versus V out = 6 Ohm ext out T = Parameter A 0.02 A 0.01 0.005 out 8 BCR420U / BCR421U ); Ohm ext TA = -40° 25° 85°C ...
Page 9
... Rext = 6 Ohm A 0. BCR421U: Output current versus Ohm ext out T = Parameter A 0. -40° 25° 85°C 0. BCR421U: Enable current versus Parameter A 3 Rext = 9 Ohm mA Rext = 10 Ohm 1 Rext = 30 Ohm Rext = 60 Ohm Rext = open BCR420U / BCR421U ); Ohm EN out ext TA = 85° 25° ...
Page 10
... EN 1 OUT BCR421U Application hints BCR420U / BCR421U 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 150 mA. R can be determined by using the diagram 'Output current versus ext 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 ...
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... For symmetric types no defined Pin 1 orientation in reel. Package SC74 ±0.2 B (0.35 +0.1 0.35 -0.05 0 0.95 1.9 0.5 0.95 Manufacturer 2005, June Date code (Year/Month) BCW66H Type code 4 3.15 Pin 1 marking 11 BCR420U / BCR421U 1.1 MAX. +0.1 0.15 -0.06 A 0.1 MAX. 0 0.2 1.15 2010-01-15 ...
Page 12
... 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 reasonable to assume that the health of the user or other persons may be endangered. BCR420U / BCR421U 12 2010-01-15 ...