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參數(shù)資料
| 型號： | P95020NQG |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 |
| 封裝： | 10 X 10 MM, 0.85 MM HEIGHT, QFN-132 |
| 文件頁數(shù)： | 124/169頁 |
| 文件大?。?/td> | 4297K |
| 代理商： | P95020NQG |
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IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
58
2011 Integrated Device Technology, Inc.
Charger – Pin Definitions
Table 90. Charger Module Pin Definitions
PIN #
PIN_ID
DESCRIPTION
A60
CHRG_GND1
Power GND Pins for the Switching Regulator in the Charger.
B50
CHRG_GND2
A61
CHRG_SW1
Switching node for the inductor of the switch-mode step-down regulator for the
Battery Charger.
B51
CHRG_SW2
A62
CHRG_INPUT1
5V Input Power from USB or an external AC adaptor supply. (VBUS)
B52
CHRG_INPUT2
A63
CHRG_SYSVCC1
System VCC Output. (VSYS)
B53
CHRG_SYSVCC2
A64
CHRG_BAT1
Positive battery lead connection to a single cell Li-Ion/Li-Poly battery. (VBAT)
B54
CHRG_BAT2
A65
CHRG_CLSEN
Input Current Limit Sense/filtering pin for current limit detection
B55
CHRG_ICHRG
Current setting. Connect to a current sense resistor
A66
CHRG_GATE
Gate Drive for (Optional) External Ideal Diode
B56
CHRG_NTC
Thermal Sense, Connect to a battery’s thermistor. (NTC)
A67
CHRG_VNTC
NTC Power output provides power to the NTC resistor string.
This output is automatically CHRG_SYSVCC level but only enabled when NTC
measurement is necessary to save power. (VNTC).
B57
GND_BAT/ADCGND
GND_BAT and ADCGND: Shared analog ground pin for battery charger and
ADC.
Charger – Overview
The Charger operation is hardware autonomous with
software redundancy and configuration. On power-up, it is
configured for a generic Li-Ion battery charging algorithm
by default, however this is mask defined. Also, the input
current limiting selection is set by the current limit
configuration register. After power-up, the current limit can
be set by GPIO4/CHRG_ILIM (write INT_ILIM of Current
Limit Configuration Register to 0, see Table 92), low sets
a 500mA current limit while high sets a 1.5A current limit.
The GPIO pin configuration is defined in the GPIO_TSC
Module and the Current Limit Configuration is defined in
the CHARGER MODULE. Both Charger and GPIO_TSC
settings must be consistent to ensure that the IDTP95020
works properly. For example, if the charger registers are
programmed such that current limiting is set via an
external pin then that GPIO must also be properly set in
the GPIO_TSC registers to prevent it from being assigned
to other functions.
Charger – Sub-blocks
The CHARGER block includes the following sub- blocks:
-
Switching Pre-Regulator to regulate/power the
system power (VSYS) when an AC adapter input is
present
-
Low-headroom Linear Charger which charges the
Li-Ion/Li-Poly battery when an AC adapter input is
present and the battery is not fully charged.
Optionally discharges the battery for safety when
the battery temperature is too high and the battery
is fully charged.
-
Die-Temperature Sensor which monitors the die
temperature so hardware autonomous actions can
be taken to lower the charging current when the
die-temperature is too high.
-
Battery Temperature Monitor which monitors the
battery pack temperature through the NTC pin,
charging is paused when the battery’s temperature
is out of range (higher than 40°C or lower than
0°C).
-
Precision Bandgap for a reference for the charging
voltage control.
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