LG -V909DW Service Manual page 41

3.9.3 TPS658621D for T20
The TPS658621D provides an easy to use, fully integrated solution for handheld devices, integrating
charge management, multiple regulated power supplies, system management and display functions in a
small 6x6 package. The I
2
Google Tablet : Power
registers have a complete set of status information, enabling easy diagnostics and host-controlled
handling of fault conditions.
DC 5V
Charger
1.5A
USB 5V
+
Li-Ion
(6,400mAh)
LGE Internal Use Only
C interface enables control of a wide range of subsystem parameters. Internal
TPS658621A
V_CHG_SYS
BAT
SDA
I2C
Controller
SCL
SM1_EN
SM0_EN
nRESET
nINT
CLK32K
RTC_OUT
+
BBAT
V2V2
VDD_3V3
AAT2153
MIC2238 VDD_1V8
VDD_1V2
AAT1217
VDD_5V0
LP8551
VDD_WLED
RP101K332D
VDD_3V3_ALWAYS
L/S
LP8720
AAT1270
AAT1270
Figure. AP Power Block Diagram
SM0 (1.86A)
SM1 (1.86A)
SM2 (1.86A) 3.7V (Don't use)
LDO0 (300mA)
3.3V
LDO1 (300mA)
LDO2 (300mA)
LDO3 (300mA)
LDO4 (300mA)
LDO5 (300mA)
LDO6 (300mA)
LDO7 (300mA)
LDO8 (300mA)
LDO9 (300mA)
L/S
VDD_3V3
LP8720
VDD_1V8
- 41 - Copyright © 2011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
Tegra 2 (T250)
1.0~1.2V (CORE)
0.9~1.0V (CPU VDD)
VDDIO_PEX_CLK
1.1V (AVDD_PLL)
1.0~1.2V (RTC)
3.3V (AVDD_USB)
1.8V (AVDD_OSC, VDDIO_SYS )
2.85V (VPP_FUSE)
3.3V (AVDD_HDMI)
1.8V (AVDD_HDMI_PLL)
2.85V (VDD_DDR_RX)
3.3V (VDD_SDIO,LCD)
1.2V (VDDIO_HSIC, AVDD_CSI_DSI)
1.8V (VDDIO_AUDIO, OSC, NAND,
BT, UART, VI)
2.85V (VCC) eMMC
32GB
1.8V (VCCQ)
1.2V
LPDDR2 (1GB)
1.8V
HDMI
White LED (4 7)
8.9" LCD (LGD)
3.3V
Thermal sensor
Touch Panel IO Voltage
Touch Panel Main Voltage
1.8V (VDD), LDO2
CODEC(WM8894)
SPKVDD, LDO1
CAMERA, VGA
Flash
BT/WiFi
Only for training and service purposes
VDD0_3V3
VBAT
VDD_3V3_ALWAYS
VDD_GPS_1V8