OB3309RP 데이터 시트보기 (PDF) - Unspecified
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OB3309RP Datasheet PDF : 12 Pages
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OB3309
Highly Integrated U Type CCFL Backlight Control
Parameter
Symbol
Conditions
Min
Typ
Max Units
Error Amplifier
Reference voltage
Open loop voltage gain
Unity gain bandwidth
Soft on current
Soft off current
Vref_EA
CBF/DMOD=22nF
or BF/DMOD=0V
ISOFT_ON
ISOFT_OFF
CMP=15nF
1.2
1.25
1.3
60
350
60
120
Soft start
Soft start current
ISST
Striking time
to 1.3
Striking timer current
Striking timer threshold
ISTIME1
Vth_STIME1
l Control and Protection Threshold / Debounce time
a Ignition completion threshold
i VS regulate voltage at Striking
t Threshold voltage for PRT
n Fault timer currnet
Fault timer threshold
de CS threshold voltage for OLP
(open lamp protection)
fi OLP debounce time
VS threshold voltage for OVP
n (over voltage protection)
o OVP debounce time
C Normal protection blanking time
Vth_CS
Vth_PRT
Vth_REG
Vth_PRT
ISTIME2
Vth_STIME2
Vth_OLP
TOLP
Vth_OVP
TOVP
T_nom
Striking
Normal
Normal
Normal
Normal, BF/DMOD=0V or
CBF/DMOD=22nF
Normal,
BF/DMOD=VDD
Normal
Normal
Normal
Normal
1.3
3
0.85
1.25
2.0
1.25
14
3
0.8
60%*Vref_EA
160
2.0
160
0.48
V
dB
Hz
TuA
IVuA
uA
uA
V
V
V
V
uA
V
V
ms
V
ms
Sec
Dimming_on time for OLP
disable
t Dimming Polarity Control
T_dim_on
igh Dimming Polarity Selection
-Br Gate Driver Output
nGate1
OGate2
Vth_POL
RPOL
RON
RON
Normal, BF/DMOD=0V or
CBF/DMOD=22nF
Negative internal burst
mode or positive external -
PWM dimming
Positive internal burst
mode or negative 2.05
external PWM dimming
Pull down resistor
Isink/Isource=70mA
-
Isink/Isource=70mA
-
480
-
-
45K
8
8
uS
2.0
V
-
ohm
12 ohm
12 ohm
Note: 1 Detail description to see Figure4 of page 8;
2 For analog dimming mode, Vth_OLP tracks with Vref_EA. Vref_EA can be calculated by the following
equation:
Vref
_
EA
=
25
36
×
(2
−
VDIM )
for
0.2V ≤VDIM ≤ 2V
©On-Bright Electronics
Confidential
-6-
Preliminary Datasheet
OB_DOC_DS_330900
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