参数资料
型号: LTC4155IUFD#TRPBF
厂商: Linear Technology
文件页数: 37/52页
文件大小: 0K
描述: IC I2C POWER MANAGER DUAL 28QFN
标准包装: 2,500
系列: PowerPath™
功能: 充电管理,电源管理
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4.35 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-QFN(4x5)
包装: 带卷 (TR)
LTC4155
OPERATION
Table 15. USB On-The-Go ID Pin Detection
Table 19. External Power (Wall or USB) Available
USB On-The-Go ID PIN DETECTION
REG3
EXTERNAL POWER (WALL OR USB) AVAILABLE
REG4
SUB ADDRESS
DIRECTION
0x03
ID_PIN_DETECT
Read
SUB ADDRESS
DIRECTION
0x04
EXT_PWR_GOOD
Read
ID PIN STATUS
D7
D6
D5
D4
D3
D2
D1
D0
POWER AVAILABLE
No Detection
0
STATUS
D7
D6
D5
D4
D3
D2
D1
D0
ID Pin Shorted to
GND*
1
Battery Power
Only
0
*LOCKOUT_ID_PIN has no effect on pin detection.
External Power
Available*
1
*Never true when On-The-Go step-up converter is active.
Table 16. USB On-The-Go Enabled Status
USB On-The-Go ENABLED STATUS
REG3
Table 20. USB Input Voltage Valid
SUB ADDRESS
0x03
OTG_ENABLED
USB INPUT VOLTAGE VALID
REG4
DIRECTION
Read
SUB ADDRESS
0x04
USBSNS_GOOD
STEP-UP REGULATOR
STATUS
D7
D6
D5
D4
D3
D2
D1
D0
DIRECTION
Read
Step-Up Switching
Regulator Inactive
Step-Up Switching
Regulator Active
0
1
USBSNS STATUS
USBSNS Voltage
Invalid
USBSNS Voltage
Valid*
D7
D6
0
1
D5
D4
D3
D2
D1
D0
*Will be true with applied input voltage within valid range or On-The-Go
Table 17. NTC Thermistor Status Report
NTC THERMISTOR STATUS REPORT
REG3
in regulation.
SUB ADDRESS
0x03
NTCSTAT[1:0]
Table 21. WALL Input Voltage Valid
DIRECTION
Read
WALL INPUT VOLTAGE VALID
REG4
NTC THERMISTOR
STATUS
D7
D6
D5
D4
D3
D2
D1
D0
SUB ADDRESS
0x04
WALLSNS_GOOD
NTC Normal
0
0
DIRECTION
Read
NTC_TOO_COLD
0
1
WALLSNS STATUS
D7
D6
D5
D4
D3
D2
D1
D0
NTC_TOO_WARM
NTC_HOT_FAULT
1
1
0
1
WALLSNS Voltage
Invalid
WALLSNS Voltage
Valid
0
1
Table 18. Low Battery Detection
LOW BATTERY DETECTION
REG3
Table 22. Input Current Limit Status
SUB ADDRESS
0x03
LOWBAT
INPUT CURRENT LIMIT STATUS
REG4
DIRECTION
Read
SUB ADDRESS
0x04
AT_INPUT_ILIM
BATTERY VOLTAGE
STATUS
Normal
D7
D6
D5
D4
D3
D2
D1
D0
0
DIRECTION
INPUT CURRENT
LIMIT STATUS
D7
D6 D5
Read
D4 D3
D2
D1
D0
Low Cell Voltage*
1
Input Current Limit Inactive
0
*Low cell voltage is only meaningful when input (WALL or USB) power
is available and the battery charger is enabled, or when automatic or
Input Current Limit Active
1
manual enable of the step-up regulator has been requested.
4155fc
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