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PDF BD9756AMWV Data sheet ( Hoja de datos )
| Número de pieza | BD9756AMWV | |
| Descripción | 7-Channel Switching Regulator Controller | |
| Fabricantes | ROHM Semiconductor | |
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STRUCTURE
PRODUCT SERIES
Silicon Monolithic Integrated Circuit
7-Channel Switching Regulator Controller for Digital Camera
TYPE BD９７５６AMWV
PIN ASSIGNMENT
BLOCK DIAGRAM
PACKAGE
Functions
Fig.1
Fig.1
Fig.2
●1.5V minimum input operating
●Supplies power for the internal circuit by using charge-pump circuit which outputs a voltage twice bigger than VBATvoltage.
or a equal voltage as VBAT + VIN.
●Contains step-up converter(1ch), step-down converter(2ch), cross converter(1ch), configurable for step-up/step-down converter(1ch),
with PWM brightness controller for step-up converter(1ch).
●Contains 4FETs for the cross converter channe.l
●3channels contain transistor for synchronous rectifying action mode.
●2channels contain FETs for the step-up converter.
●All channels contain internal compensation between inputs outputs of error amps.
●Contains sequence control circuit for ch1,2 and 4.
●Operating frequency 1.2MHz(CH1～4), 600kHz(CH5～7).
●Contains output interception circuit when over load.
●2 channels have high side switches with soft start function, one channel has PMOS back gate control circuit.
●Thermally enhanced UQFN044V6060 package.(6mm x 6mm, 0.4mm pitch)
○Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Limits
Power Supply Boltage
VBAT
－0.3～7
Power Input Voltage
VHx1～4
HS67H
VLx6～7
－0.3～7
－0.3～7
－0.3～20
Output Current
Power Dissipation
VIN
IomaxLx1
IomaxHx2
IomaxHx3～4
IomaxHS6～7
IomaxLx6～7
Pd
-0.3～7
±1.2
±1.5
±1.2
±1.2
±0.8
0.54 *1
Operating Temperature
Topr －25～+85
Storage Temperature
Tstg －55～+150
Junction Tempareture
Tjmax
+150
(*1) Without external heat sink, the power dissipation reduces by 4.32mW/℃ over 25℃。
Units
V
V
V
V
V
A
A
A
A
A
W
℃
℃
℃
○Recommended operating conditions
Parameter
Spec
Symbol
MIN
TYP
MAX
Unit
Power Supply Voltage
VBAT
1.5
-
5.5
V
VREF Pin Connecting Capacitor
VREGA Pin Connecting Capacitor
SCP Pin Connecting Capacitor
C+H to C+L connecting Capacitor
【Oscillator】
Oscillator Frequency
OSC Timing Resistor
CVREF
0.47
1.0
4.7
μF
CVREGA
0.47
1.0
4.7
μF
CSCP
-
- 0.47 μF
CF 1.0 -
- μF
fosc 0.6 1.2 1.5 MHz
RT 47 62 120 kΩ
Status of this document
The Japanese version of this document is the official specification. Please use the translation version of this document as a reference to expedite understanding of the official version.
If these are any uncertainty in translation version of this document, official version takes priority.
REV. B
1 page  
Notice
Notes
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 of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,
fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of
any of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
R0039A
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