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OB3316
High Performance CCFL Controller Push pull
General Description
OB3316 is a high performance Cold Cathode
Fluorescent Lamp (CCFL) backlight controller IC
dedicated for use in push pull configuration. The
controller is designed to drive single or multiple
CCFLs in Liquid Crystal Display (LCD)
applications.
OB3316 converts unregulated DC input voltage to
the pseudo sinusoidal voltage and current
waveforms in required frequency, to ignite and
operate CCFL lamps.
OB3316 provides a high degree of design flexibility
by offering great programmability for key
parameters which includes operating frequency,
striking frequency, striking time, burst frequency
for dimming and soft-start time.
OB3316 offers variable dimming controls. Both
internal burst and external low frequency PWM
(LPWM) dimming methods are available for a wide
range of dimming control (10% to 100%). Further
more, analog dimming is provided through
external DC input control to achieve 40% to 100%
dimming range.
The highly integrated OB3316 provides complete
protection features covering IC Under Voltage
Lockout (UVLO), System supply brownout
protection, Output Over Voltage Protection (OVP)
and Lamp Fail Safe Functions (LFSF).
OB3316 is available in DIP16 and SOP16
packages.
Typical Application Circuit
Features
z Built-in burst and external LPWM for wide range
dimming control
z Analog dimming Control
z 0-3V DC voltage direct dimming without any
additional components
z High precision reference and frequency control
z Support single or multiple CCFLs
z Flexible user programmability:
External programmable constant operating
frequency
Programmable striking frequency and voltage
control
Programmable soft on/off timer
Programmable striking time control
Programmable internal burst mode frequency
control
z Comprehensive protection coverage:
IC supply under voltage lockout (UVLO)
System supply brownout protection
Output over voltage protection (OVP)
Lamp Fail Safe Functions (LFSF)
Applications
z LCD Monitor
z LCD TV
Notebook Computerzwww.DataSheet.co.kr
z LCD flat panel display for instrument, automobile
and handhold device
© On-Bright Electronics
-1-
Confidential
OB_DOC_DS_16A2
Datasheet pdf - http://www.DataSheet4U.net/

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OB3316
High Performance CCFL Controller Push pull
Absolute Maximum Ratings
Parameter
VDDA Input Voltage to AGND
AGND to PGND
I/O(all pins except pin7, 10, 13)
to AGND
Operating Ambient
Temperature TA
Operating Junction
Temperature TJ
Min/Max Storage Temperature
Tstg
Value
7V
+/-0.3V
-0.3 to
VDDA + 0.3V
0 to 70oC
150oC
-55 to 150oC
Note: Stresses beyond those listed under “absolute maximum
ratings” may cause permanent damage to the device. These
are stress ratings only, functional operation of the device at
these or any other conditions beyond those indicated under
“recommended operating conditions” is not implied. Exposure
to absolute maximum-rated conditions for extended periods
may affect device reliability.
Recommended Operating Range
Parameter
VDDA Voltage
Operating Frequency
Value
4.5V to 5.5V
30 to 150KHz
Package Thermal Characteristics
Parameter
Thermal resistance θJA (SOP)
Thermal resistance θJA (DIP)
Value
85 oC /W
60 oC /W
Ordering Information
Part Number
OB3316RP
OB3316QP
Description
DIP16, pb-free
SOP16, pb-free
OB3316 X X X
High performance CCFL
controller – push pull
Package
R:DIP16www.DataSheet.co.kr
Q:SOP16
Package Pb free Packing
Blank:Normal
P:Lead-free
Blank:Tube
A: Taping
Package Marking Information
LT YWW
OB3316RP
S
R: Package Designator for DIP16
P: Pb-free Package
Y: Year Code
WW: Week Code
S: Internal tracking Code
LT YWW
OB3316QP
s
Q: Package Designator for SOP16
P: Pb-free Package
Y: Year Code
WW: Week Code
S: Internal tracking Code
© On-Bright Electronics
-2-
Confidential
OB_DOC_DS_16A2
Datasheet pdf - http://www.DataSheet4U.net/

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Pin Configuration
ENA
CMP/SST
CS
NC
STIME
VS
VDDA
GATE2
1
2
3
4
5
6
7
8
OB3316
High Performance CCFL Controller Push pull
16 SVD
15 DIM
14 BF/DMOD
13 AGND
12 RT
11 RI
10 PGND
9 GATE1
Terminal Assignment
Pin Number Pin Name I/O
1
ENA
Input
2 CMP/SST I/O
3 CS Input
4 NC -
5
STIME
I/O
6 VS Input
7
VDDA
Power
8 GATE2 Output
9 GATE1 Output
10
PGND
Ground
11 RI I/O
12 RT I/O
13
AGND
Ground
14 BF/DMOD Input
15 DIM Input
16
SVD
Input
Pin Function
Active High. Enable Control Input
Connected to Loop compensation capacitor, this capacitor
also sets the soft start time
Lamp current sense input
No Connection. Keep floating or short to ground in PCB
Connected to capacitor for striking time setting
Output voltage sense input
Power supply
N MOSFET drive output2
www.DataSheet.co.kr
N MOSFET drive output1
Power ground
Connected to Resistor setting strike frequency
Connected to Resistor setting operating frequency
Analog ground
Connected to Capacitor setting Burst frequency or used for
dimming mode selection (Dual function input)
Dimming control signal input
System power supply voltage detect input
© On-Bright Electronics
-3-
Confidential
OB_DOC_DS_16A2
Datasheet pdf - http://www.DataSheet4U.net/