bd9855mwv ROHM Co. Ltd., bd9855mwv Datasheet - Page 2

• Manufacturer Part Number: bd9855mwv
• Description: 4 Channel Switching Regulator Control System For Dsc
• Manufacturer: ROHM Co. Ltd.

○
※The protective circuit start working when circuit is operated by 100% duty. So it is possible to use only for transition time shorter than charge
◎This product is not designed for normal operation with in a radioactive environment.
Electrical Characteristics
time for SCP.
【Internal Regulator】
【Under Voltage Lock Function】
Threshold Voltage１,2
【Short Circuit Protection】
SCP Threshold Voltage
Stand by Voltage
【Oscillator】
Frequency CH1～3
Frequency CH4
Max duty 1,2(Step Down)
【Error AMP】
【Reference Voltage VREF】
Output Current when shorted
【Soft Start】
CH1,2 Highside SW ON Resistance
CH1,2 Highside SW ON Resistance
CH3 Driver Output Voltage H
CH3 Driver Output Voltage L
CH4 Driver Output Voltage H
CH4 Driver Output Voltage L
CTL,SEL Pull down Resistance
【Circuit Current】
STAND-by Current
Circuit Current（VCC,PVCC Pin Input Current）
Hysterisis voltage width
Timer Start Threshold Voltage
SCP Out Source Voltage
Max duty CH3 Lx31
Max duty CH3 Lx32
Max duty 4
RTSS Pin Standby Voltage
Input Bias Current
INV Threshold Voltage 1
NON_INVoffset Voltage
VREF Output Voltage
Load Regulation
【Output Driver】
CH3 Lx31Pin Lowside SW ON Resistance
CH3 Lx32Pin Highside SW ON Resistance
Circuit Current（Application Io=none）
Regulator Output voltage for Boost terminal
Regulator Output Voltage for inside standard
RTSS Pin smk Current
RTSS Pin source Current
Line Regulation
SS1,2,3,4 source current
SS Discharge Resistance
CH3 Lx32Pin Lowside SW ON Resistance
CTL terminal voltage(ON),
CTL terminal voltage (OFF),
SEL terminal voltage (? frequency)
SEL terminal voltage (same frequency)
【PG Output Pin】
【Control terminal】
PG Pin ON Resistance
PG Pin Leak Current
Parameter
（
Ta=25℃，VCC=PVCC=6V, RT=82kohm, CTL1～4=3V with no designation）
RCTL,RSEL
Dmax1,2
RON12N
RON31N
RON32N
Vhys1,2
Dmax31
Dmax32
IRTSSO
RON12p
RON32p
VREGA
Vstd1,2
fosc123
VOREF
RdisSS
Vout3H
Vout4H
Dmax4
RTSSF
IRTSSI
Vout3L
Vout4L
RonPG
VCTLH
VCTLL
VSELH
Symbol
VSELL
VINV1
VREG
Fosc4
Iccapl
Iscp1
Vssc
DVLo
IlkPG
ISTB
Vtsc
DVLi
IINV
Voff
Vtc
Ios
Iss
Icc
PVCC-1.0
PVCC-1.0
-0.3
-0.3
0.45
0.79
0.99
250
MIN
4.8
2.4
3.4
2.1
2.5
0.8
0.4
－
－
78
86
-7
2
2
-
-
-
3
-
-
-
-
2
1
-
-
-
-
-
-
-
-
-
-
-
-
-
REV. C
Standard value
PVCC -0.5
PVCC -0.5
TYP
500
200
150
250
200
150
400
2.5
3.6
0.1
2.2
0.5
0.5
0.8
0.5
0.5
0.5
10
84
92
-5
30
10
25
5
5
1
-
-
1
5
-
1
1
1
2
0
-
-
-
-
-
0
4
MAX
1000
Vcc
0.55
0.81
1.01
100
100
100
100
350
300
400
350
300
700
5.2
2.6
3.8
0.2
2.3
7.5
1.2
0.6
7.5
7.5
0.8
0.8
90
96
20
-3
7
35
-
1
-
1
1
1
5
8
7
5
-
3
Units
MHz
MHz
μA
μA
μA
μA
mΩ
mΩ
mΩ
mΩ
mΩ
μA
mV
mV
mV
mV
mV
mA
kΩ
kΩ
mA
mA
nA
uA
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V
V
%
%
%
%
V
V
Ireg=1mA
Ireg=1mA
RT=82kΩ、SEL=GND
RT=82kΩ、SEL=VREGA
Vscp=0V ※
CTL1～4=0V
INV1～4, NON4=0V
CH1～3
NON4=1V, INV4=FB4
VCC=4.8～8.4V
Iref=10μA～100μA
Vref=0V
VSCP=0.1V
Vss=0.2V
ILX=50mA
ILX=-50mA
IOUT3=50mA
IOUT3=-50mA
ILX=-50mA
Vo3=6.0V, ILX=50mA
ILX=-50mA
IOUT4=50mA,INV4=1.1V
IOUT4=-50mA,INV4=0.9V
PG=1V
PG=15V
CTL1～4=0V
INV=2.5V,NON=1V
All CH ON
SEL=VREGA
FB Pin Monitor
VSCP=0.1V
VCCMonitor,VREGMonitor
VCC cancel ,VREG cancel
Conditions
circuit
Test
2/4