DS3994Z+W Maxim Integrated Products, DS3994Z+W Datasheet - Page 27

• Manufacturer Part Number: DS3994Z+W
• Description: Display Drivers 4-Ch Cold-Cathode Fl uorescent Controller
• Manufacturer: Maxim Integrated Products

Specifications of DS3994Z+W

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 13. Typical Operating Circuit
INTERNAL LAMP FREQUENCY OUTPUT
CONFIGURATION
EXTERNAL LAMP FREQUENCY INPUT/
NOTE 1: ONLY ONE CHANNEL SHOWN TO SIMPLIFY DRAWING.
NOTE 2: SEE THE COMPONENT SELECTION SECTION FOR RECOMMENDED EXTERNAL COMPONENTS.
R3
INTERNAL DIGITAL PWM OUTPUT
EXTERNAL DIGITAL PWM INPUT/
R4
PORT
ANALOG BRIGHTNESS
R5
R6
V
CC
R7
BRIGHT
PSYNC
LSYNC
LOSC
POSC
FAULT
SDA
SCL
A0
DS3994
____________________________________________________________________
LCMn
OVDn
SVM
GND
GAn
GBn
V
V
CC
Fluorescent Lamp Controller
CC
= 5V ±10%
C1
C5
4-Channel Cold-Cathode
R1
R2
DUAL POWER
MOSFET
Typical Operating Circuits
SUPPLY VOLTAGE
(5V ±10% TO
24V ±10%)
LAMP VOLTAGE MONITOR
LAMP CURRENT MONITOR
TRANSFORMER
C4
C2
C3
CCFL LAMP
R8
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