CL320
Lowering CL320 Power Dissipation: Zener Diode
V
LL
Z
DROP
C
IN
100nF
8
7
6
5
VIN
OUT1
V
DD
OUT2
OUT3
REG
Host
Controller
1
2
3
EN1
EN2
EN3
GND
V
Z
< (V
LL(MIN)
- 6.5V)
where: V
Z
= Zener Voltage
V
LL(MIN)
= minimum supply voltage
CL320
4
Pin Description
Pin #
1
2
3
4
5
6
7
8
Underside
Plate
Name
EN1
EN2
EN3
GND
OUT3
OUT2
OUT1
VIN
GND
Supply voltage. 6.5V to 90V. Bypass locally with a 100nF capacitor to ground.
The exposed underside plate is internally connected to the GND pin. The plate may either
be left floating or connected to ground. Solder the plate to an exposed copper area on the
PCB for heatsinking purposes (see recommended layout).
Constant current output (sinking). Connect the cathodes of the LEDs to these pins.
Circuit common.
Output enable, active low.
Description
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
6
SUPERTEX [ Supertex, Inc ]
