BD9897 Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BD9897 Datasheet PDF : 5 Pages
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○ Electric Characteristics（Ta=25℃，VCC=24V）
Parameter
（（WHOLE DEVICE））
Operating current
Stand-by current
（（STAND BY CONTROL））
Stand-by voltage H
Stand-by voltage L
（（UVLO BLOCK）））
Operating voltage (VCC)
Hesteresis width (VCC)
Operating voltage (UVLO)
Hesteresis width (UVLO)
（（REG BLOCK））
REG output voltage
REG source current
（（OSC BLOCK））
Active edge setting current
Negative edge setting current
OSC Max voltage
OSC Min voltage
Soft start current
SRT ON resistance
（（BOSC BLOCK））
BOSC Max voltage
BOSC Min voltage
BOSC constant current
BOSC frequency
（（FEED BACK BLOCK））
IS threshold voltage 1
IS threshold voltage 2
VS threshold voltage
IS source current 1
IS source current 2
VS source current
IS COMP detect voltage ①
IS COMP detect voltage ②
VREF input voltage range
（（DUTY BLOCK））
High voltage
Low voltage
DUTY-OUT sink resistance
DUTY-OUT source resistance
（（OUTPUT BLOCK））
LN output sink resistance
LN output source resistance
HN output sink resistance
HN output source resistance
MAX DUTY
OFF period
Drive output frequency
（（TIMER LATCH BLOCK））
Timer Latch setting voltage
Timer Latch setting current
（（COMP CLOCK））
COMP1 over voltage detect voltage
COMP2 over voltage detect voltage
COMP2 under voltage detect voltage ①
COMP2 under voltage detect voltage ②
((Synchronous Block))
High voltage
Low voltage
CT_SYNC sink resistance
CT_SYNC source resistance
High voltage input range
Low voltage input range
Symbol
Icc1
Icc2
VstH
VstL
VuvloH
⊿VCC_Vuvlo
Vuvlo2
⊿Vuvlo
VREG
IREG
Iact
Ineg
VOSCH
VOSCL
ISS
RSRT
VBCTH
VBCTL
IBCT
fBCT
VIS①
VIS②
VVS
IIS1
IIS2
IVS
VISCOMP①
VISCOMP②
VREFIN
VDUTY-OUTH
VDUTY-OUTL
RDUTY-OUTSink
RDUTY-OUTSouce
RsinkLN
RsourceLN
RsinkHN
RsourceLN
MAX DUTY
TOFF
FOUT
VCP
ICP
VCOMPH
VCOMP2_H
VCOMP_L_1
VCOMP_L_2
VCT_SYNCH
VCT_SYNCL
RCT_SYNC_SYNC
RCT_SYNC_SOURCE
VCT_SYNC_IN_H
VCT_SINK_IN_L
MIN.
－
－
2.0
-0.3
5.7
0.26
2.179
0.074
5.68
20.0
1.35/(RT*7)
Iact×29
1.8
0.35
0.6
－
1.94
0.40
1.35/BRT
291
1.225
－
1.220
－
32
－
0.90
－
0.6
2.8
－
－
－
0.75
2.5
1.25
2.5
46.0
100
58.5
1.94
0.40
2.460
2.460
1.225
0.606
2.8
－
－
－
2.0
-0.3
（This product is not designed to be radiation-resistant.）
Limits
TYP.
7.2
13.0
－
－
6.0
0.35
2.25
0.098
5.80
－
1.5/(RT*6)
Iact×35
2.0
0.45
1.1
100
2.00
0.50
1.5/RT
300
1.250
VREFIN
1.250
－
50
－
0.94
VREFIN×0.73
－
3.1
-
150
250
1.5
5
2.5
5
48.0
200
60.0
2.0
0.55
2.485
2.485
1.25
0.625
3.1
－
150
370
－
－
MAX.
13
30.0
VCC
0.8
6.3
0.43
2.321
0.122
5.92
－
1.65/(RT*5)
Iact×41
2.2
0.60
1.6
200
2.06
0.60
1.65/RT
309
1.275
VIS①
1.280
0.9
68
0.9
0.98
－
1.6
3.4
0.5
300
500
3.0
10
5.0
10
49.5
400
61.5
2.06
0.70
2.510
2.510
1.275
0.644
3.4
0.5
300
740
3.3
0.6
2/4
Unit
Conditions
mA
CT_SYNC_IN = OPEN
μA
V
System ＯＮ
V
System ＯＦＦ
V
V
V
V
V
VCC>7.0V
mA
A
A
V
fCT=120kHz
V
fCT=120kHz
μA
Ω
V
fBCT=0.3kHz
V
fBCT=0.3kHz
A
VBCT=0.2V
Hz
(BRT=33kΩ BCT=0.048μF)
V
V
VREF applying voltage
V
μA
DUTY=2.2V
μA
DUTY=0V IS=0.5V
μA
V
VREFIN≧1.25V
V
VREFIN＜1.25V
V
No effect at VREF＞1.25V
V
V
Ω
Ω
Ω
Ω
Ω
VBST-VSW=5.0V
Ω
VBST-VSW=5.0V
%
FOUT=60kHz
ns
kHz
(RT=4.7kΩ CT=235pF)
V
μA
V
VSS＞2.2V
V
VSS＞2.2V
V
VSS＞2.2V
V
VSS＜2.2V
V
V
Ω
Ω
V
V
REV. B
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