OB3309RP Просмотр технического описания (PDF) - Unspecified
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OB3309RP Datasheet PDF : 12 Pages
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Pin Configuration
OB3309
Highly Integrated U Type CCFL Backlight Control
Terminal Assignment
Number Pin Name I/O
1
ENA
Input
2
RI
I/O
3
RT
I/O
4
DRC
Input
5
BF/DMOD I/O
ht 6
POL
Input
ig 7
VDD
Power
r 8
GATE 1
Output
9
GATE 2
Output
B 10
GND
Ground
-11
VS
Input
On12
PRT
Input
13
CS
Input
14
CMP
I/O
15
STIME
I/O
16
DIM
Input
IVT
to
al Pin Function
i Enable control input, active high
t Connected an external resistor to ground to set striking frequency (No
n Floating)
e Connected an external resistor to ground to set operation frequency
d Dimming range setting.
• Connect 0.2V to 2V DC voltage can set minimum burst duty from 100%
i to 0% for bust dimming;
f • Connect 0V to 1.25V DC voltage can set minimum Vref_ea from 0V to
n1.25V for analog dimming;
Connected to VDD to set analog dimming mode
CoConnected to GND to set external LPWM dimming mode
Connect an external capacitor to GND to set internal burst dimming
mode. The burst mode frequency is determined by the external capacitor
PWM Dimming polarity selection :
• POL<2V: Negative analog / burst mode , positive LPWM dimming
• POL>2V: Positive burst mode , negative analog / LPWM dimming
+5V Power supply
Output drive
Output drive
Power ground
Lamp voltage feedback
Lamp fault detection
Lamp current feedback
Loop compensation and soft start time setting
Connect an external capacitor to GND to set striking time
Dimming signal input
©On-Bright Electronics
Confidential
-3-
Preliminary Datasheet
OB_DOC_DS_330900
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