3. Power Management System
3.1 Features
-Handles all GSM Baseband Power Management
-2.8V to 5.5V Input Range
-Charger Input up to 15V
-Seven LDOs Optimized for Specific GSM Subsystems
-High Operation Efficiency and Low Stand-by Current
-Li-Ion and NiMH Battery Charge function
-SIM Card Interface
-Three Open-Drain Output Switches to Control the LED, Alerter and Vibrator
-Thermal Overload Protection
-Under Voltage Lock-out Protection
-Over Voltage Protection
-Power-on Reset and Start-up Timer
-48-Pin QFN Package
3.2 Applications
-GSM/GPRS Mobile Handsets
-Basic Phone and High-end Phone
3.3 General Description
The MT6305 is a power management system chip optimized for GSM handsets, especially
those based on the MediaTek MT6120 system solution. It contains seven LDOs, one to
power each of the critical GSM sub-blocks. Sophisticated controls are available for
power-up during battery charging, keypad interface, and RTC alarm. The MT6305 is
optimized for maximum battery life, featuring a ground current of only 107µA and 187µA
when the phone is in standby and operation respectively.
The MT6305 battery charger can be used with lithium ion (Li+) and nickel metal hydride
(NiMH) batteries.
The MT6305 contains three open-drain output switches for LED, alerter and vibrator
control. The SIM interface provides the level shift between SIM card and microprocessor.
The MT6305 is available in 48-pin QFN package. The operating temperature range is
from -25°C to +85°C.
3.4 Detailed Description Overview
The MT6305 is a power management chip optimized for use with GSM baseband chipsets
in handset applications. Figure 1 shows the block diagram of the MT6305.
The MT6305 contains several blocks:
-Seven Low Dropout Regulators (Core, Digital IO, Analog, Crystal Oscillator, Real-
Time Clock,Memory, SIM)
-SIM Card Interface
-Vibrator, Alerter, and LED Drivers
-Power Sequence and Protection Logic
-Reset Generator
Содержание SP-770
Страница 1: ...SP 770 AS Manual GSM GPRS Cellular Phone SKYSPRING VITELCOM...
Страница 6: ...SECTION1 SP 770 PRODUCT OVERVIEW...
Страница 27: ...Figure4 Battery Charger Flow chart...
Страница 36: ...SECTION2 SCHEMATIC LAYOUT 1 MAIN PART SCHEMATIC LAYOUT 1 1 BASEBAND PART...
Страница 37: ...1 2 MMI PART...
Страница 38: ...1 3 RF PART...
Страница 39: ...2 MAIN KEY PART SCHEMATIC LAYOUT...
Страница 40: ...3 LCD...
Страница 41: ...SECTION3 PCB LAYOUT 1 MAIN PCB 1 1 Location Map of Main PCB Top...
Страница 42: ...1 2 Location Map of Main PCB Bottom...
Страница 43: ...2 MAIN KEY PCB 2 1 Location Map of Main KEY PCB Top...
Страница 44: ...2 2 Location Map of Main KEY PCB Bottom...
Страница 45: ...3 LCD PCB...
Страница 46: ...SECTION4 MECHANICAL ASSEMBLY...
Страница 48: ...3 LOGIC PART TROUBLESHOOTING...
Страница 50: ...3 2 Troubleshooting 2 LCD Display Backlight error...
Страница 51: ...3 3 Troubleshooting 3 Key push error...
Страница 52: ...3 4 Troubleshooting 4 Vibrator error...
Страница 53: ...3 5 Troubleshooting 5 MP3 Play error...
Страница 54: ...3 6 Troubleshooting 6 Camera Preview error...
Страница 55: ...3 7 Troubleshooting 7 FM Radio Play error...
Страница 57: ...3 9 Troubleshooting 9 Bluetooth error...
Страница 58: ...4 RF PART TROUBLESHOOTING...
Страница 59: ...4 1 Troubleshooting 10 RX path check...
Страница 60: ...4 2 Troubleshooting 11 TX path check...
Страница 64: ...4 Settings 4 1 Flash Tool setting 1 Firstly Check values of the setting in an Options menu...
Страница 66: ...5 SW Downloading 1 Connect LT cable to the PC 2 Press the Download button...
Страница 67: ...3 Connect LT cable to the target mobile phone with power off 4 Completion of downloading...
Страница 74: ...5 4 Save back up NVRAM data as a file Save back up NVRAM data from target as a file...
Страница 77: ...6 4 Download to flash Click download to flash button and then updating parameters is complete...