Fibocom H330S, Hardware User Manual

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H330S Hardware User Manual Page 22 of 44
5 Hardware Interface
5.1 Power Interface
5.1.1 Power Supply
H330S modules require 3.3V~4.2V direct current power supply, which can provide the maximum GSM
emission current of 2A.
Input power supply requirements:
Parameter Minimum Value Recommended Value Maximum Value Unit
VBAT 3.3 3.8 4.2 V
Points for attention in design:
1. Supply voltage fluctuation shall be lower than 300mV.
2. Minimum supply voltage drop shall be higher than 3.3V.
Filter capacitor of supply circuit is designed as follows:
Recommended
capacitor
Application Description
1000uF Supply capacitance
Reduce power-supply fluctuation during phone call.
The capacitance value bigger is better
10nF, 100nF Digital signal noise
Filter the interference caused by clock and digital
signals
8.2pF, 10pF 1800/1900/2100 MHz Filter RF interference
33pF, 39pF 850/900 MHz Filter RF interference
5.1.2 Power Consumption
Parameter Description Condition Typical Value Unit
I
off
RTC mode 60 uA
I
idle
Idle mode
GSM 13 mA
WCDMA 13 mA
I
sleep
Low power
mode
DRX 2 2
mA DRX 5 2
DRX 9 2