LINEAR LED DRIVER
Description
DESCRIPTION
The BL8585 is a high-voltage adjustable current source with accurate temperature compensation.
The device is designed to provide a constant current source determined by an external sense resistor Rsense.
The current is adjustable from 10mA to 20mA with less than 10% error while input changes from 5V to 90V.
With an external resistor (R1 in Figure 1) between VA and IS pin, the heat in the IC can be significantly reduced while keeping the summation of IC and R1 current to be constant.
This is extremely useful in the area that power lines are not very stable.
A typical application for the BL8585 is to drive LEDs with a constant current varies from 1020mA.
They can also be used in parallel to provide higher current according to the bias.
This device is available in TO-92 package.
TYPICAL APPLICATION CIRCUIT
BL8585
WIDE RANGE, LINEAR LED DRIVER
FEATURES
Wide operation range: from 5V to 90V(VA-B)
TO-92 packages available ILED can be programmed from 10mA to
20mA via changing Rsense Power dissipation can be adjusted Easy to use, only 3 pins and very little
external components are needed Can be paralleled for higher current Temperature compensated
APPLICATIONS
Industrial lamp indicators LED driver Accent lighting Automotive Constant current source Constant current sink
PIN CONFIGURATIONS
R1
BL8585
Rsense
{VLED
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BL8585
MARKING INFORMATION
Marking information
Marking
Description
8585 YYBZZ
8585 YY B ZZ
Product code Lot NO.
FAB code Date code
ORDERING INFORMATION
Code
□1 □2
□3
BL8585 □1 □2 □3
Description Temperature & Rohs: C: -40~85C,Pb Free Rohs Std.
Package type: H: TO-92 Packing type: PT: Paper type BG: Bag (TO-92)
ABSOLUTE MAXIMUM RATING
Name Max Supply Voltage Thermal resistance Maximum Junction temperature Storage temperature
Symbol VA-B
ΘJA
TJ Tst
ELECTRICAL CHARACTERISTICS
Symbol
Item
Conditions
Min
VA-B Operating Input Voltage
IA-B Current regulation
VIS Current sense voltage
TJ
O...
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