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BD9478F-XX Datasheet(PDF) 3 Page - Rohm

Part # BD9478F-XX
Description  PWM pulse Generator for LCD Panels
Download  15 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD9478F-XX Datasheet(HTML) 3 Page - Rohm

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Datasheet
BD9478F
TSZ02201-0F1F0C100010-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
24. Jul.2012 Rev.002
www.rohm.com
TSZ22111
・15・001
●Electrical Characteristics (Unless otherwise specified, Ta=25°C,VCC=5V)
Parameter
Symbol
Limit
Unit
Condition
Min.
Typ.
Max.
[Whole Device]
Circuit Current during Operation
ICC
2
4
mA
PDIM=3V,CT=0.01uF
VSYNC=EXTPWM=open
[UVLO Block]
Release voltage
VUVLO
3.5
3.8
4.1
V
VCC=SWEEP UP
Hysteresis voltage
VUHYS
150
300
600
mV
VCC=SWEEP DOWN
[PLL Block]
Oscillation frequency when VSYNC is
input no signal
fCTNS
142
150
158
Hz
CT=0.01µF,LPF=0V
Triangle wave maximum voltage
VCTH
2.70
3.00
3.30
V
fCT=150Hz
Triangle wave minimum voltage
VCTL
0.40
0.50
0.60
V
fCT=150Hz
Synchronous signal abnormal judgment
voltage, (at High frequency input)
CT_SYNC
_DET1
2.612
2.750
2.888
V
LPF=2.0V→3.0V
Synchronous signal normal judgment
voltage, (at High frequency input)
CT_SYNC
_OKH
2.517
2.650
2.783
V
LPF=3.0V→2.0V
Internal RT voltage at Synchronous
signal, abnormal judgment when High
frequency input
VRTFH
-
2.750
-
V
LPF=3V
Synchronous signal abnormal judgment
voltage, (at Low frequency input)
CT_SYNC
_DET2
0.331
0.350
0.389
V
LPF=1.0V→0.1V
Synchronous signal normal judgment
voltage, (at Low frequency input)
CT_SYNC
_OKL
0.414
0.450
0.486
V
LPF=0.1V→1.0V
Internal RT voltage at Synchronous
signal, abnormal judgment when High
frequency input
VRTFL
-
0.360
-
V
LPF=0.25V
Switch voltage to internal fixed
frequency
VINTF
0.10
0.15
0.20
V
LPF=1.0V→0.1V
Internal RT voltage at switched to
internal fixed, frequency
VRTFI
-
0.900
-
V
LPF=0V
【【【【Input pin (EXTPWM,PDIM,VSYNC)】】】】
Input High level
VIH
2.0
-
20
V
Input Low level
VIL
-0.3
-
0.8
V
Pull down resistance
RIPD
0.5
1.0
2.0
M
【【【【Output pin (PWMOUT)】】】】
Output High level
VOH
4.3
4.85
-
V
Io=-1mA
Output Low level
VOL
-
0.1
0.5
V
Io=1mA


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