Справочник Пользователя для Shanghai SIMCom Wireless Solutions Limited 201802
Smart Machine Smart Decision
SIM7600V-H_User Manual_V1.00
2018-02-24
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In addition, in order to guard over voltage protection, it is suggested to use a zener diode with 5.1V
reverse zener voltage and more than 500mW power dissipation.
reverse zener voltage and more than 500mW power dissipation.
Table 7: Recommended zener diode list
No.
Manufacturer Part Number
power dissipation
Package
1
On semi
MMSZ5231BT1G
500mW
SOD123
2
Prisemi
PZ3D4V2H
500mW
SOD323
3
Vishay
MMSZ4689-V
500mW
SOD123
4
Crownpo
CDZ55C5V1SM
500mW
0805
3.1.2
Recommended Power Supply Circuit
It is recommended that a switching modepower supply or linear regulator power supply is used. It
is important to make sure that all the components used in the power supply circuit can resist a peak
current up to 2A.
The following figure shows the linear regulatorreference circuit with 5V input and 3.8V output.
is important to make sure that all the components used in the power supply circuit can resist a peak
current up to 2A.
The following figure shows the linear regulatorreference circuit with 5V input and 3.8V output.
Figure 6: Linear regulator reference circuit
If there is a big voltage difference between input and output for VBAT power supply, orthe
efficiency is extremely important,then a switching mode power supply will be preferable. The
following figure shows theswitching mode power supply reference circuit.
efficiency is extremely important,then a switching mode power supply will be preferable. The
following figure shows theswitching mode power supply reference circuit.
Figure 7: Switching modepower supply reference circuit
Note: The Switching Mode power supply solution for VBAT must be chosen carefully against
Electro Magnetic Interference and ripple current from depraving RF performance.
Electro Magnetic Interference and ripple current from depraving RF performance.