DS3994 Maxim Integrated Products, DS3994 Datasheet - Page 28

• Manufacturer Part Number: DS3994
• Description: 4-Channel Cold Cathode Fluorescent Lamp Controller
• Manufacturer: Maxim Integrated Products

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DataSheet
4
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
28
© 2006 Maxim Integrated Products
4-Channel Cold-Cathode
Fluorescent Lamp Controller
Figure 14. Typical Operating Circuit with Multiple Lamps per Channel
TRANSISTOR COUNT: 53,000
SUBSTRATE CONNECTED TO GROUND
Heaney
U
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
.com
CONFIGURATION
OFF/RESET = CLOSED
is a registered trademark of Dallas Semiconductor Corporation.
PORT
ANALOG BRIGHTNESS
LAMP FREQUENCY
R3
4.7kΩ
INPUT/OUTPUT
INPUT/OUTPUT
DPWM SIGNAL
ON = OPEN
R4
4.7kΩ
SVM
BRIGHT
PSYNC
LSYNC
LOSC
POSC
FAULT
SDA
SCL
A0
Chip Information
DS3994
DEVICE SUPPLY VOLTAGE
GND
LCM
OVD
V
GA
GB
CC
(5V ±10%)
DUAL N-CHANNEL
POWER MOSFET
+12V TO +24V
LM339
Typical Operating Circuits (continued)
R1
+5V
For the latest package outline information, go to
www.maxim-ic.com/DallasPackInfo.
is a registered trademark of Maxim Integrated Products, Inc.
R2
INVERTER SUPPLY VOLTAGE
(12V ± 10% TO 24V ± 10%)
BULK POWER
SUPPLY
CAPACITANCE
Package Information
1 OF 4 CHANNELS
C
C
C
C
C
C
C
C
H
L
H
L
H
L
H
L
R
R
R
R
FB
FB
FB
FB
CCFL
LAMP A
CCFL
LAMP B
CCFL
LAMP C
CCFL
LAMP D