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BD8924G 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BD8924G은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 BD8924G 기능
기능 Silicon monolithic integrated circuit
제조업체 ROHM Semiconductor
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BD8924G 데이터시트, 핀배열, 회로
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● Structure
● Product name
● Type
● Package outline
● Block Diagram
Silicon monolithic integrated circuit
Boost DCDC converter for TV tuner
BD8924G
Fig. 1
Fig. 2
● Features
1) For varactor voltage in the TV tuner.
2) Over current Protection circuit
3) SSOP-5 small size
This chip is not designed to protect itself against radioactive rays.
Absolute maximum ratings(Ta=25℃)
Parameter
Symbol
Ratings
Unit
Condition
Maximum applied voltage1
Vmax1
7.0
V It applies to VIN terminal
Maximum applied voltage 2 Vmax2
36
V It applies to SW, VOUT terminals
Power dissipation
Pd1
674.9 (Note1)
mW At single unit
Operating temperature range Topr
-30 ~ +85
oC
Storage temperature range
Tstr
-55 ~ +150
oC
(Note1) Pd derated at 5.4mW/℃ for temperature above Ta=25℃,
mounted on 70mm×70mm×1.6mm glass-epoxy PCB.
Operation condition(Ta=25℃)
Parameter
Power supply voltage range
Symbol
VCC
Ratings
4.5~5.5
Unit Condition
V VIN terminal voltage
REV. A




BD8924G pdf, 반도체, 판매, 대치품
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Caution on use
(1)Absolute Maximum Ratings
An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can break down devices,
thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute
maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc.
(2)The power supply and the GND lines
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. Please take care about interference by
common impedance of the wiring pattern when there are two or more power supply and GND line. For the GND line, please note the
separation of the large current route and the small signal route including the external circuit. Furthermore, for all power supply terminals to ICs,
mount a capacitor between the power supply and the GND terminal. At the same time, in order to use an electrolytic capacitor, thoroughly check to
be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus
determining the constant.
(3)GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
(4)Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs.
Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND
terminal, the ICs can break down.
(5)Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(6)Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause
interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to
handle the input terminals, such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will
operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power
supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical
characteristics.
(7)External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the
nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(8)Thermal design
Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in actual states of use.
Moreover, please use it within the range where output Tr doesn't exceed the rated voltage and ASO.
(9)Rush current
In CMOS IC, when the power supply is turned on rush current might flow momentarily in logical internal irregular state. Therefore, note
drawing the capacity of the power supply coupling, the power supply, and width and drawing the GND pattern wiring, please.
(10)Test terminal and unused terminal processing
Please process a test terminal and unused terminal according to explanations of the function manual and the application note, etc. to be
unquestionable while real used. Moreover, please inquire of the person in charge of our company about the terminal without the explanation
especially.
(11)Content of material
The application notes etc. are the design material to design the application, and no one of the content securing it. Please decide the
application after it examines enough and it evaluates it including external parts.
REV. A

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관련 데이터시트

부품번호상세설명 및 기능제조사
BD8924G

Silicon monolithic integrated circuit

ROHM Semiconductor
ROHM Semiconductor

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