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零件编号 | DA903x | ||
描述 | (DA903x) Advanced Power Management Controllers | ||
制造商 | Intel | ||
LOGO | |||
1 Page
mwww.DataSheUDesAt4iU9n.0cgo3mDx iAaldovgaSnceemdicPoonwdeurctor*
oManagement Controllers with the
.cIntel® PXA27x Processor Family
t4UApplication Note — Revision 1.0
eMay 2004
www.DataShe www.DataSheet4U.comReference Number: 280091-001
Using Dialog Semiconductor* DA903x Advanced Power Management
Controllers with the Intel® PXA27x Processor Family
The applications processor controls all system-related peripheral functions whereas the
communication controller predominantly focuses on the radio-communication part. The inter-
processor communication occurs through the high-speed mobile serial-link interface (MSL).
The communication processor and its associated parts are optional. In this case, when only using
the application processor PXA27x, the Dialog Semiconductor PMIC derivate DA9031 may be
selected to reduce overall system cost.
2.1 System Power Connection Diagram
Connecting the Intel® PXA27x Processor Family and DA903x PMIC is shown in Figure 2.
Figure 2. Intel® PXA27x Processor Family and DA903x PMIC Interconnection
PXA27x
PWR_SCL_GPIO3
PWR_SDA_GPIO4
NBATT_FAULT
NVDD_FAULT
SYS_EN
PWR_EN
NRESET
IRQ_GPIO0
VCC_SRAM
VCC_MEM
VCC_LCD
VCC_BB
VCC_PLL
VCC_USIM
VCC_USB
VCC_CORE
VCC_IO
VCC_IO
10k
10k
2.2µF
2.2µF
2.2µF
1.0µF
1.0µF
33µF
10µH
DA903x
I2C_CLOCK
I2C_DATA
BATT_FAULT
VCC_FAULT
SYS_EN
PWR_EN
RESOUT1_N
IRQ
LDO16
LDO19/BUCK 1
LDO18
LDO15
LDO17
ONKEY
EXTON
VCHG
CH_SOURCE
CH_GATE
CHSENSEP
CHSENSN
CH_VBAT
TBATREF
TBAT
VDVCBUCK
SWDVCBUCK
WLEDSW
WLEDIPOS
WLEDINEG
DC_Batt
10k
Power-On-Switch
Battery&
Charger
IF
Block
V_Charger
USB_Charger
DC_Batt
Sense
Battery
Pack
White
LED-IF
Block
White-LEDs
VCC_BATT
FVPP
FWP
0.47µF
SUPER
- CAP
VRTC
2.2k
VDDREF
VREF
RREF
VREFEX_M
VLDO_INT
VDD_MONO
1.0µF 0.1µF
100k
1.0µF 0.1µF
The schematic diagram in Figure 1 shows how the PXA27x processor and the DA903x can be
interconnected to build an efficient power-supply system with few additional components. This
configuration is set up for dynamic-voltage management as well as for supporting sleep mode. The
white LED backlight circuit is optional.
Not all the pins of the DA903x PMIC and the PXA27x processor are shown. The diagram is
described in more detail throughout the remainder of this section and is also referred to in other
sections. Refer to the device data sheets for the use and description of the other pins.
4 Application Note
Using Dialog Semiconductor* DA903x Advanced Power Management
Controllers with the Intel® PXA27x Processor Family
3.6
4.0
• The buck converter output voltage is programmable over the I2C bus in the range 0.85V to
1.625V in 25mV steps. Additionally, the output voltage can be fixed at 1.8V for use with
memory.
• The buck converter output voltage ramp rate is programmable over the I2C bus in the range of
1.6mV/us to 25mV/us with a 4 bit register.
System Programming
System programming covers the power-related issues from a software perspective. The proposed
methods typically are part of the operating system or a basic input/output system.
The PXA27x processor registers and the DA903x PMIC registers are being read and written at
power up, when the system enters/exits sleep mode, or when the core voltage changes dynamically.
Using the I2C link, the PXA27x processor has full control to the DA903x registers.
Battery Charger Control
The battery-charger control block controls the charging of the battery and allows a startup
independent of the battery voltage. The charging block contains the following:
• An internal regulator, which is active when the battery voltage is too low to allow normal
operation; this regulator is supplied from the VCHG pin
• Current regulation, which is needed for constant current charging
• Voltage regulation, which is needed for constant voltage charging
• Current monitoring, which is always active when the charger is on
• Over voltage monitoring, which is always active when the charger is on
• Temperature monitoring, which is needed to turn off charging when the battery temperature is
too high or too low.
The battery charger supports the following battery chemistries:
• Single-cell Li-Ion at 4.1V
• Single-cell Li-Ion at 4.2V
• Li-Polymer pack
Charging is separated into three different modes. One is the standalone pre-charge mode; the
second is the fast-linear charge mode, which is controlled by the control processor. A third fast-
pulse charge mode can also be used, where the charging current is limited by the “wall-cube”
power supply rather than the external FET. In this mode, the external FET acts solely as a switch,
allowing high current charging of the battery.
Refer to the DA903x documentation for more information on battery charging capabilities and
functionality.
12 Application Note
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页数 | 17 页 | ||
下载 | [ DA903x.PDF 数据手册 ] |
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