CL325 Datasheet, PDF (1/7 Pages) Supertex, Inc – 3-Channel 25mA Linear LED Driver

CL325
3-Channel 25mA Linear LED Driver
Features
► ±6% current accuracy @ 4.0 -15V
► 90V standoff voltage
► Separate enable pins for each channel allow for
PWM dimming
► Over-temperature protection
► 8-Lead SOIC (w/Heat Slug) package
Applications
► LCD backlighting
► Indicator lamps
General Description
The CL325 is designed to drive 3 strings of LEDs at a
constant current of 25mA.
Other drivers with currents in the range of 20 - 30mA are
available. The drive current is fixed, with a ±6% tolerance
over a V_OUT range of 4 - 15V.
Separate enable pins for each channel allow for PWM
dimming, 3-step linear dimming, or individual disconnection
of faulty LED strings.
Over-temperature protection circuitry shuts down all 3
channels when the nominal die temperature reaches 135°C.
Normal operation resumes when the die temperature drops
by 30°C.
The CL325 is available in the 8-Lead SOIC (w/Heat Slug)
package and requires a single ceramic bypass capacitor
which may be shared among several drivers.
Block Diagram and Typical Application Circuit
6.5 - 90V
Host
Controller
C_IN
100nF
8
VIN
REG V_DD
1 _EN1
2 _EN2
3 _EN3
7
OUT1
6
OUT2
5
OUT3
GND
CL325
4