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3. TECHNICAL BRIEF
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Trickle Charging
Trickle Charging of the main battery, enabled through SBI control and powered from VDD, is provided
by the PM6650 IC, The trickle charger is on-chip programmable current source that supplies current
from VDD to pin (VBAT). Trickle charging can be used for lithium-ion and nickel-based batteries, with
its performance specified below (3.2V). The charging current is set to 80mA.
Parameter
Min
Typ
Max
Unit
Trickle Current
0
80
mA
Battery
P-channel MOSFET
ISNS_M
handset supply
voltage (VDD)
S
D
G
Main
Battery
BAT_FET_N
VBAT
22 uF
or more
R_SNS
0.1 ohm
VDD pins
PM6650
Input Power
Management
Trickle Charger
Battery
Control
Battery
Detectors
Under-Volt
Lockout
diff
MUX
VBATDET
THLVB
PM6650 General
Housekeeping
ADC_BYP
AMUX_IN1 (MPP1)
AMUX_IN2 (MPP2)
Offset and
Scaling
MU
X
AMUX_OUT
VREF
REF_OUT
(MPP8)
Monitored
Voltage
Charging
Current
3) On-chip programmable
current source runs off VDD
5) Charging current (blue)
flows out pin 6 (VBAT)
6) Battery voltage is routed to MSM
through PM analog multiplexer
(tan); MSM HKADC measures VBAT
4) Current is set by software:
0 (off) to 80 mA; 8 states
1) Pass transistor (not
shown) is turned ON
2) Battery transistor
is turned OFF
7) Trickle charging is finished
when the battery reaches
the desired threshold
"Auto Trickle Charge" feature
When this feature is enabled
VBAT is checked as soon as a
valid external supply is detected.
If VBAT < 1V:
Faulty battery, too low to chg;
PM6650 powers up normally
If 1V < VBAT < 3V:
Battery good but depleted;
trickle charging auto-started.
Special algorithm followed.
If VBAT > 3V:
Normal PM6650 power-up
Summary of Contents for U8210
Page 22: ...3 TECHNICAL BRIEF 23 Figure 3 2 1 1 RTR6250 IC Functional Block Diagram ...
Page 37: ...3 TECHNICAL BRIEF 38 Figure 3 5 12 1 Bluetooth system architecture ...
Page 110: ...4 TROUBLE SHOOTING 111 USB_D USB_D USB_VBUS X100 48M 48MHz ...
Page 115: ...4 TROUBLE SHOOTING 116 LCD Control data flow ...
Page 117: ...4 TROUBLE SHOOTING 118 LCD Control data flow ...
Page 122: ...4 TROUBLE SHOOTING 123 TR400 ...
Page 124: ...4 TROUBLE SHOOTING 125 FLASH_ON from Main Bíd PM6650 CN1 Flash LED ...
Page 127: ...4 TROUBLE SHOOTING 128 FB503 CN500 FB502 CN2 CN1 ...
Page 129: ...4 TROUBLE SHOOTING 130 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 131: ...4 TROUBLE SHOOTING 132 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 133: ...4 TROUBLE SHOOTING 134 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 135: ...4 TROUBLE SHOOTING 136 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 137: ...4 TROUBLE SHOOTING 138 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 139: ...4 TROUBLE SHOOTING 140 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 141: ...4 TROUBLE SHOOTING 142 MIC Contact C404 C401 ...
Page 143: ...4 TROUBLE SHOOTING 144 C115 Head_Phone Input Pin 2 3 C102 CN304 R624 ...
Page 146: ...4 TROUBLE SHOOTING 147 Receptacle 4 6V 4 6V ...
Page 151: ...5 BLOCK DIAGRAM 152 Top Side ...
Page 152: ...5 BLOCK DIAGRAM 153 Bottom Side ...
Page 154: ...6 DOWNLOAD 155 It is ready for downloading ...
Page 160: ...6 DOWNLOAD 161 6 Click on Download to download ...
Page 165: ...6 DOWNLOAD 166 Downloading the Module image Finally Download has been complete ...
Page 168: ...6 DOWNLOAD 169 When you meet the NV Restore error Connect to the phone ...
Page 170: ...6 DOWNLOAD 171 Select the proper file and click on Restore Reading the NV file and restore NV ...
Page 200: ... 201 9 PCB LAYOUT ...
Page 201: ... 202 9 PCB LAYOUT ...
Page 202: ... 203 9 PCB LAYOUT U8210 KEYPAD SPEY0032001 1 1 TOP ...
Page 203: ... 204 9 PCB LAYOUT ...
Page 204: ... 205 9 PCB LAYOUT ...
Page 206: ... 207 ...
Page 207: ... 208 ...