Hytera PD415 - 5 Circuit Descriptions; Baseband Section; Power Supply Module

VHF1 (136
‐
174 MHz)
Circuit Descriptions
9
5. Circuit Descriptions
5.1 Baseband Section
5.1.1
Power Supply Module
Diagram of Power Control
The power supply employs a single cell 7.4 V Li-ion battery. The RF section uses LDO to generate a 5 V
voltage for FGU and PLL circuits, as well as the control parts of TX circuits. The baseband section uses
LDO to generate a 3.3 V voltage for Codec, MCU and SCT3928. The core power supply of SCT3928
uses DC/DC to convert the voltage to 1.2 V.
To VCO
NTA7002N
PWR_ON
POWER_ON
7.4V
V_BAT
SW-
LDO
XC6204F502PR
LDO
XC6204F502PR
DC-DC
ADP2370ACPZ-R7
DC-DC
ADP2370ACPZ-R7
To PLL
5VFGU
To TX
5VRT
POW-KEY-DET
3V6D
LDO
RP102N331B
LDO
RP102N331B
LDO
RP102N331B
LDO
RP102N331B
1V2D
3V3A
3V3D
3V3A_RX
3V3_FGU
LDO
RP102N331B
3V3D1
To Sicomm core
CODEC
MIC
MCU
E2PROM
LED
SW_channel
KEY
RX
PLL
Sicomm
Security Key
12.288MHz
CODEC
3V3D
PWR_CTRL_SI
RST