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HUAWEI MU739 HSPA+ LGA Module
Hardware Guide
3.3 Power Interface
3.3.1 Overview
The power supply part of the MU739 module contains:
Table 3-2 lists the definitions of the pins on the power supply interface.
Table 3-2 Definitions of the pins on the power supply interface
Pin No.
49
51, 52
20
32
38
40
62~64,
66~68,70,
71, 73,74,
79~114
3.3.2 VBAT Interface
When the MU739 module works normally, power is supplied through the VBAT_PMU
and VBAT_PA pins and the voltage ranges from 3.3 V to 4.2 V (typical value is 3.8 V).
The 114-pin LGA module provides one VBAT_PMU pin, two VBAT_PA pins and
forty-six GND pins. To ensure that the MU739 module works normally, all the pins
must be connected.
When the MU739 module is used for different applications, special attention should be
paid to the design of the power supply. When the MU739 module transmits at the
maximum power, the transient peak current may reach 2.0 A. In this case, the
Issue 01 (2011-08-24)
VBAT PIN for the power supply
SIM_VCC PIN for USIM card power output
USB_VBUS PIN for USB power supply
VCC_EXT1 PIN for 1.8 V power output
VCC _IN PIN for 41~46 PIN voltage supply
Signal
Name
VBAT_PMU
VBAT_PA
SIM_VCC
USB_VBUS
VCC_EXT1
VCC _IN
GND
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
I/O
Description
Battery supply,
P
power supply for
Baseband and
Transceiver
P
Battery supply,
power supply for PA
P
Power supply for
USIM card
P
Power supply for
USB
P
1.8 V power output
P
1.8 V power input
-
Ground
DC Characteristics (V)
Min
Typical
Max
3.3
3.8
4.2
3.3
3.8
4.2
-
1.8/2.9
-
-
3.3/5
-
1.7
1.8
1.9
-
1.8
-
-
0
-
20
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