CAT1023 CATALYST [Catalyst Semiconductor], CAT1023 Datasheet - Page 7

• Manufacturer Part Number: CAT1023
• Description: Catalyst Semiconductor
• Manufacturer: CATALYST [Catalyst Semiconductor]

CAT4237
High Voltage CMOS Boost White LED Driver
Features
Package Information
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drives 8 white LEDs in series from 3V
low quiescent ground current 0.3mA
power efficiency over 84%
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
thin SOT23 5-lead (1mm max height)
Features
Package Information
TM
Featured Products
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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
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
20-lead SOIC
3V to 4.2V
VIN
Automotive 10-Channel Serial Latched LED Driver
w w w . c a t s e m i . c o m
V CC
5V
C1
+
-
C1
V BATTERY = 14V (typical)
V BATT
Controller
+
-
VIN
SHDN
L
CAT4237
V BATT
V CC
SCLK
XLAT
BLANK
SIN
GND
SW
GND
CAT310
PGND
D1
CAT310
FB
SOUT
OUT0
OUT1
OUT2
OUT9
30mA
V FB = 300mV
White
V OUT
LEDs
RS
w h i t e l e d d r i v e r s
RS
RS
20mA
RS
5