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MS1003SH Datasheet(PDF) 31 Page - Shindengen Electric Mfg.Co.Ltd

Part # MS1003SH
Description  Control IC
PDF  41 Pages
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Manufacturer  SHINDENGEN [Shindengen Electric Mfg.Co.Ltd]
Direct Link  http://www.shindengen.co.jp/
Logo SHINDENGEN - Shindengen Electric Mfg.Co.Ltd

MS1003SH Datasheet(HTML) 31 Page - Shindengen Electric Mfg.Co.Ltd

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MS1003SH･MS1004SH
Application Note Ver.2.2
SHINDENGEN ELECTRIC MFG. CO. , LTD
31/41
5.5.4 Design of VG pin
(1) Basic circuit
The VG pin outputs switching signals. It can be used when
the main switching device is a voltage-driven element.
The diagram to the right shows the basic circuit
configuration. The initial design values should be 10 Ω for
the gate resistor R102 and 33 kΩ for the resistor R101
between the gate and the source.
(2) Circuit requiring a drive circuit
The main switching device driving performance of
the MS100x series is specified under “Soft drive” of
“Electric/thermal characteristics” in the
specification. A circuit for enhancing the driving
performance is required between the VG pin and the
main SW device as shown to the right if the main
switching device cannot be driven directly by the
VG pin in the basic circuit (1).
Refer to the diagram to the right to determine
constants.
Use the gate total charge quantity Qg of the main switching device as a guide for determining whether a
driving circuit is required.
Qg of main SW device > 20 nC to 25 nC
Driving circuit required
QG of main SW device < 20 nC
No driving circuit required
(3) Handling high power
Design the drive circuit as shown below if a power supply circuit requires more than one main switching
device. The diagram illustrates an example of a circuit using two main SW devices. For configurations
involving three main SW devices, connect the devices in parallel based on the example. Use the
constants shown in the diagram as initial design values and evaluate to determine optimal constants.
3
5
R102
100Ω
R306
10kΩ
R104
6
R304
100Ω
R305
10Ω
Q302
Q303
Q101
MS1003SH
MS1004SH



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