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The ADP3408(U301) controls power on sequence.
Power on sequence
If a battery is inserted, the battery powers the 6 LDOs.
Then if PWRONKEY is detected, the LDOs output turn on.
REFOUT is also enabled, Reset signal is generated and send to the AD6522.
LDO block
There are 6 LDOs in the ADP3408.
Charging Process
1.
Check charger is inserted or not.
2.
If ADP3408 detects that Charger is inserted, the CC-CV charging starts.
3.
Exception: When battery voltage is lower than 3.2V, the trickle charge (low current charge mode)
starts firstly. After the battery voltage reaches to 3.2V, the CC-CV charging starts.
Battery charging block
It can be used to charge Lithium Ion and/or Nickel Metal Hydride batteries. The phones use Li-Ion
battery only. Charger initialization, trickle charging, and constant current charging are implemented in
hardware.
Pins used for charging
CHGDET : Interrupt to AD6522 when charger is plugged.
CHGEN : Control signal from AD6522 to charge Li+ battery.
EOC : Interrupt to AD6522 when battery is fully charged.
GATEIN : Control signal from AD6522 to charge NiMH battery. But, not used.
MVBAT : Battery voltage divider. Divide ratio is 1:2.3 and it is sensed in AD6521 AUX_ADC4.
TA (Travel Adaptor)
Input voltage : AC 110V ~ 240V, 50~60Hz
Output voltage : DC 5.2V(
±
0.2 V)
Output current : Max 800mA
Battery
Li-ion battery : Max 4.2V, Nom 3.7V
Standard battery : Capacity - 850mAh, Li-ion
3. TECHNICAL BRIEF
Содержание G3100
Страница 32: ... 34 3 TECHNICAL BRIEF Figure 3 20 TX IQ Signal Figure 3 21 RX IQ Signal ...
Страница 40: ... 42 Figure 3 26 1 Voice band circuit diagram Headset Hands free kit part 1 3 TECHNICAL BRIEF ...
Страница 42: ... 44 Figure 3 27 AD6521 circuit diagram 3 TECHNICAL BRIEF ...
Страница 73: ... 75 4 3 8 Receiver RF Level Figure 4 1 Test Points of Rx Level 4 TROUBLE SHOOTING ...
Страница 74: ... 76 4 3 9 Transmitter RF Level Figure 4 2 Test Points of Tx Level 4 TROUBLE SHOOTING ...
Страница 81: ... 83 The Receiver part Circuit Diagram C203 C207 C206 4 TROUBLE SHOOTING ...
Страница 87: ... 89 R202 MIC201 R204 C204 C201 R208 R206 C208 Q203 4 TROUBLE SHOOTING ...
Страница 93: ... 95 Test SIM Connector Check J301 4 TROUBLE SHOOTING ...
Страница 97: ... 99 J201 R240 C234 L201 R241 4 TROUBLE SHOOTING U205 U203 U204 ...
Страница 101: ... 103 CN302 U203 U204 4 TROUBLE SHOOTING ...
Страница 102: ... 104 U205 4 TROUBLE SHOOTING ...
Страница 104: ...5 DISASSEMBLY INSTRUCTION 106 3 Detach the rest components as shown below Figure 5 3 Detaching the rest components ...
Страница 108: ...3 Press Start and Wait until Erase is completed 110 1 Press Start 2 Confirm completion 6 SOFTWARE DOWNLOAD ...
Страница 117: ... 119 9 PCB LAYOUT 9 1 Rear Part ...
Страница 118: ...9 2 Front Part 120 ...
Страница 124: ... 126 11 2 Standalone Test Equipment Setup GSM Test Equipment Power Supply PC JIG RS 232 Cable Phone 11 STAN ALONE TEST ...
Страница 134: ... 137 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...