CAT9554 Datasheet, PDF (7/28 Pages) Catalyst Semiconductor – Catalyst Semiconductor

CAT4237
High Voltage CMOS Boost White LED Driver
Features
■ drives 8 white LEDs in series from 3V
■ low quiescent ground current 0.3mA
■ power efficiency over 84%
VIN
3V to 4.2V
C1
■ adjustable output current (up to 40mA)
■ high-frequency 1MHz operation
■ high voltage power switch
■ shutdown current less than 1 µA
■ load fault protection against open-circuits
■ tight line/load regulation
Package Information
■ thin SOT23 5-lead (1mm max height)
white led drivers
D1
L
SW
VIN
CAT4237
VOUT
White
LEDs
SHDN
GND
VFB = 300mV
FB
20mA
CAT310
Automotive 10-Channel Serial Latched LED Driver
Featured _Features Products
■ output drivers withstand load-dump transients up to 40V
■ operates over automotive temperature range: -40 to +125°C
■ drives 10 LEDs in parallel at 50mA per channel
■ output channels can drive a combination of white or color LEDs
VBATTERY = 14V (typical)
■ serial output allows cascading of multiple CAT310’s to drive
greater than 10 LEDs
■ operating voltage up to 17V
■ simple LED pattern programming through the 10 MHz serial
interface
■ blank pin provides global on/off control of all LEDs
■ under Voltage Lockout
■ over Voltage Protection
VCC ₊
5V ^-
+
VBATT
-
C1
Controller
30mA
VBATT
VCC
OUT0
CAT310 ^OUT1
OUT2
SCLK
XLAT
BLANK
OUT9
SIN
SOUT
GND PGND
Package Information
■ 20-lead SOIC
ALOGEN ^FR
LEAD
F
R
E
E
TM
www.catsemi.com
RS RS RS
RS
5