3. TECHNICAL BRIEF
- 49 -
3.14. Battery charging/ USB charging circuit
The ICDL pin function is to program the cradle current during the cc mode. The cc mode current is
programmed by the following equations
I
CLD
= 16685.5 / 39K - 0.026 = 400mA
The End Of Charging current is set by IMIN That can be programmed by the as following equation:
I
EOC
= 14478 / 100K - 4 = 140mA
Charging indicator LED LD100 controlled by S-GOLD2’s GPIO that is CHG_LED_CTRL. When
TA(Travel Adaptor) is plugged in to 18pin MMI connector, SM-POWER detect charger voltage then
inform charger detecting to S-GOLD2. S-GOLD2 maintain low level of CHG_LED_CTRL until get
EOC(End Of Charging) message from SM-POWER. The LD100 controlled by S-GOLD2 both power
off and power on case. When USB cable is connected via MMI connector, indicator LED is controlled
same mechanism with TA inserted case. USB charging EOC is not indicated when the terminal is in off
status. LED just indicates charging status even though USB charging process reached EOC because
S_GOLD2 is in off status.
CHARGIING IC
100K
R315
C313
VCHG
1u
R318
100K
VBUS_USB
1u
C311
USB
2
7
USBON
_CHG
4
5
_EN
3
_PPR
R319
10K
U301
ISL6299
10
BAT
1
CRDL
GND
8
9
ICDL
IMIN
6
11
PGND
1u
C312
R312
10K
USFB13L
D301
2V72_IO
100K
R311
VBAT
R314
39K
CHG_EN
EOC
Figure 21 USB charging circuit
Содержание KE 770
Страница 1: ...Service Manual Model KE770 Service Manual KE770 Date April 2007 Issue 1 0 ...
Страница 3: ... 4 ...
Страница 5: ... 6 ...
Страница 49: ...3 TECHNICAL BRIEF 50 3 15 BLUETOOTH Figure 22 BLUETOOTH Functional block diagram ...
Страница 57: ...3 TECHNICAL BRIEF 58 RF Block Diagram III 2 RF circuit ...
Страница 76: ...Check Points 5 Trouble shooting 77 ...
Страница 78: ...5 Trouble shooting 79 ...
Страница 82: ...5 Trouble shooting 83 ...
Страница 87: ...5 Trouble shooting 88 ...
Страница 100: ... 101 6 Download S W upgrade Click on the blue text to select the COM port ...
Страница 101: ...6 Download S W upgrade 102 Will change the window as below ...
Страница 103: ...6 Download S W upgrade 104 During download the screen will look something like this ...
Страница 105: ... 106 ...
Страница 111: ... 112 8 PCB LAYOUT ...
Страница 112: ... 113 8 PCB LAYOUT ...
Страница 113: ... 114 8 PCB LAYOUT ...
Страница 114: ... 115 8 PCB LAYOUT ...
Страница 115: ... 116 8 PCB LAYOUT ...
Страница 117: ...9 RF Calibration 118 9 2 3 Click SETTING Menu 9 2 4 Setup Ezlooks menu such as the following figure ...
Страница 119: ...9 RF Calibration 120 9 2 7 Select MODEL 9 2 8 Click START for RF calibration 9 2 9 RF Calibration finishes ...
Страница 121: ...10 Stand alone Test 122 4 Click Update Info for communicating Phone and Test Program ...
Страница 125: ... 126 ...
Страница 143: ...Note ...
Страница 144: ...Note ...