BCR401W Infineon Technologies, BCR401W Datasheet - Page 6

• Manufacturer Part Number: BCR401W
• Description: IC, LED DRIVER, LINEAR, SOT-343-4
• Manufacturer: Infineon Technologies
• Type: Linearr

Specifications of BCR401W

• Device Type: LED
• Supply Voltage Max: 18V
• No. Of Pins: 4
• Supply Voltage Min: 1.2V
• Package / Case: 4-SOT-343
• Packages: SOT343
• Vs (min): 1.2 V
• Vs (max): 18.0 V
• Iout (typ): 10.0 mA
• Iout (max): 60.0 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Standard Application Circuit:
Application hints
BCR401W serves as an easy to use constant current source for LEDs. In stand alone
application an external resistor can be connected to adjust the current from 10 mA to 60 mA.
Rext can be determined by using the diagram 'Output current versus external resistor',
or by refering to diagram 'Output current versus reference voltage'. Look for your desired
output current on the y axis and read out the corresponding Vdrop. Calculate Rext:
Rext = Vdrop / (Iout -(Vdrop/Rint))
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:
B C R 401W
constant current sources in 12 & 24V striplight applications
AN077 gives hints to thermal design
AN182 provides a guideline for replacing resistor biasing with BCR401W / BCR402W
1
Is
2
Iout
3
4
+ V s
R ext
Vdrop
www.infineon.com/lowcostleddriver
6
Application Circuit:
supply voltages >18V
Vsupply
I
DRIVER
Vs
GND
BCR401W
BCR402W
I
OUT
Rext
Iout
+ I
DRIVER
I
OUT
BCR401W
LEDs
(optional)
Rsense
LEDs
2010-01-12