bd9855mwv ROHM Co. Ltd., bd9855mwv Datasheet

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bd9855mwv

Manufacturer Part Number
bd9855mwv
Description
4 Channel Switching Regulator Control System For Dsc
Manufacturer
ROHM Co. Ltd.
Datasheet
1.BD9855MWV.pdf (5 pages)
STURUCTURE
Type
PRODUCUT SERIES
THYSICAL DIMENSIONS Package(Plastic Mold) Fig.1、Block Diagram Fig.2、Pin Description Fig.3
FEATURES
○Operating Conditions
※)Please connect capacitor at input/output terminal (VCC,PVCC,VREF,VREG etc.) to operate IC stabilize.
Status of this document
The Japanese language version of this document shall be the official specification.
Any translation of this document shall be for reference only.
○Absolute Maximum Ratings（Ta=25℃）
【Input Voltage】
Power Supply Voltage
【Reference Output】
VREG,VREGA terminal capacitor
VREF terminal capacitor
【Protect Circuit】
SCP terminal capacitor
【Oscillator】
Oscillator frequency
OSC timming resistor
RTSS terminal capacitor
SYNC terminal input H
SYNC terminal input L
SYNC terminal input Duty
【Driver】
BST-Lx voltage
BST-Lx capacitor
LX31terminal input voltage
CH3 output range
PVCC1,2,4 terminal input voltage
CH1,2,3output current
(*1) Without external heat sink, the power dissipation degrades by 4.2mW/℃
(*2)Power dissipation degrades by 8.0mW/℃ above 25℃, when mounted on a PCB (70mm×70mm×1.6mm).
P o w e r S u p p l y Vo l t a g e
I n p u t
P o w e r
O p e r a t i n g Te m p e r a t u r e
S t o r a g e Te m p e r a t u r e
J u n c t i o n Te m p e r a t u r e
Parameter
●Short Circuit Protection (SCP), Under Voltage Lockout Function (UVLO),
●Independent ON/OFF Function Each Channel、UQFN044V6060 Package（0.4mm pitch）
●Include step-down 2ch,Cross converter 1ch,step down/inverting 1ch.
Parameter
Include external synchronous rectification operation
D i s s i p a t i o n
Silicon Monolithic Integrated Circuit
V o l t a g e
BD9855MWV
4 Channel Switching Regulator control system for DSC
VCC,PVCC
PVCC1,2,4
Ioutch1,2,3
Symbol
VSYNCH
VSYNCL
VVOUT3
CVREF
CRTSS
VLX31
CSCP
Dsync
CVR*
Fosc
Vbst
Cbst
RT
BST1-LX1、BST2-LX2
PG,SYNC, CTL1,2,3,4
VCC,PVCC
Symbol
Vo3,LX32
Tjmax
LX31
SEL
Topr
Tstg
Pd
0.047
0.001
0.047
1000
MIN
0.47
-0.3
0.6
3.0
3.5
4.0
47
40
－
－
－
4
REV. C
Spec.
10000
TYP
1.0
0.1
1.0
0.1
82
－
50
－
－
－
－
－
6
-
-
540(*1),1000(*2)
－55～+150
－0.3～8.4
－25～+85
－0.3～15
－0.3～15
－0.3～15
－0.3～7
－0.3～7
Limits
150
above 25℃.
MAX
VCC
0.22
120
2.2
2.2
2.2
0.5
5.5
7.0
14
－
60
14
14
1.5
1
MHz
Unit
μF
μF
μF
kΩ
μF
pF
%
V
V
V
V
V
V
V
A
Units
mW
℃
℃
℃
V
V
V
V
V
V
Condition
1/4

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bd9855mwv Summary of contents

Page 1

... Silicon Monolithic Integrated Circuit Type 4 Channel Switching Regulator control system for DSC PRODUCUT SERIES BD9855MWV THYSICAL DIMENSIONS Package(Plastic Mold) Fig.1、Block Diagram Fig.2、Pin Description Fig.3 ●Include step-down 2ch,Cross converter 1ch,step down/inverting 1ch. FEATURES ●Short Circuit Protection (SCP), Under Voltage Lockout Function (UVLO), Include external synchronous rectification operation ● ...

Page 2

Electrical Characteristics Ta=25℃，VCC=PVCC=6V, RT=82kohm, CTL1～4=3V with no designation） ○ （ Parameter 【Internal Regulator】 Regulator Output voltage for Boost terminal Regulator Output Voltage for inside standard 【Under Voltage Lock Function】 Threshold Voltage１,2 Hysterisis voltage width 【Short Circuit Protection】 Timer Start Threshold ...

Page 3

Package BD9855 ○ Block Diagram FB1 BST1 INV1 ERRORAMP1 - SS1 + CH1 + Step Down (Current mode) FB2 BST2 INV2 ERRORAMP2 - SS2 + CH2 + Step Down (Current mode) FB3 PVCC4 INV3 ERRORAMP3 - CH3 SS3 + ...

Page 4

Notes 1.) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC deterioration or damage. Assumptions should not be made regarding the state ...

Page 5

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...

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