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SIM800H bảng dữ liệu(PDF) 20 Page - SIMCom

tên linh kiện SIM800H
Giải thích chi tiết về linh kiện  Hardware Design_V2.02
PDF  73 Pages
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nhà sản xuất  SIMCOM [SIMCom]
Trang chủ  https://www.simcom.com
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SIM800H bảng dữ liệu(HTML) 20 Page - SIMCom

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4. Application Interface
4.1. Power Supply
The power supply range of SIM800H&SIM800L is from 3.4V to 4.4V.Recommended voltage is 4.0V.The
transmitting burst will cause voltage drop and the power supply must be able to provide sufficient current up to
2A. For the VBAT input, a bypass capacitor (low ESR) such as a 100 µF is strongly recommended.
Increase the 33pF and 10pF capacitors can effectively eliminate the high frequency interference. A
5.1V/500mW Zener diode is strongly recommended, the diode can prevent chip from damaging by the voltage
surge. These capacitors and Zener diode should be placed as close as possible to SIM800H&SIM800L VBAT
pins.
Figure 5: Reference circuit of the VBAT input
Table 6: Recommended zener diode
Vendor
Part number
Power(watts)
Packages
1
On semi
MMSZ5231BT1G
500mW
SOD123
2
Prisemi
PZ3D4V2H
500mW
SOD323
3
Vishay
MMSZ4689-V
500mW
SOD123
4
Crownpo
CDZ55C5V1SM
500mW
0805
The following figure is the reference design of +5V input power supply. The designed output for the power
supply is 4.1V, thus a linear regulator can be used.
Figure 6: Reference circuit of the LDO power supply
SIM800H&SIM800L_Hardware Design_V2.02
20
2015-07-27



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