參數資料
型號： MAX1667
廠商： Maxim Integrated Products, Inc.
英文描述： Chemistry-Independent, Level 2 Smart Battery Charger
中文描述： 與化學類型無關的Level 2智能電池充電器
文件頁數： 19/28頁
文件大?。?/td> 225K
代理商： MAX1667
M
Chemistry-Independent,
Level 2 Smart Battery Charger
______________________________________________________________________________________
19
ChargerStatus()
The ChargerStatus() command uses Read-Word proto-
col (Figure 8b). The command code for ChargerStatus()
is 0x13 (0b00010011). The ChargerStatus() command
returns information about thermistor impedance and the
MAX1667’s internal state. The Read-Word protocol
returns D15–D0. Table 8 describes the meaning of the
individual bits. The latched bits, THERMISTOR_HOT
and ALARM_INHIBITED, are cleared whenever BAT-
TERY_PRESENT = 0 or ChargerMode() is written with
POR_RESET = 1.
Interrupts and the
Alert-Response Address
An interrupt is triggered (
INT
goes low) whenever power
is applied to DCIN, the BATTERY_PRESENT bit changes,
or the POWER_FAIL bit changes. BATTERY_PRESENT
and POWER_FAIL have interrupt masks that can be set
or cleared via the ChargerMode() command.
INT
stays
low until the interrupt is cleared. There are two methods
for clearing the interrupt: issuing a ChargerStatus() com-
mand, and using a modified Receive Byte protocol with a
0x19 (0b0011001) Alert-Response address. The
MAX1667 responds to the Alert-Response address with
its address (0x13) left justified as the most significant bits
of the returned byte.
__________Applications Information
Negative Input Voltage Protection
In most portable equipment, the DC power to charge
batteries enters through a two-conductor cylindrical
power jack. It is easy for the end user to add an
adapter to switch the DC power’s polarity. Polarized
capacitor C6 would be destroyed if a negative voltage
were applied. Diode D4 in Figure 7 prevents this from
happening.
Figure 8. SMBus a) Write-Word and b) Read-Word Protocols
0
MSB LSB
Preset to
0b0001001
1b
7 bits
W
SLAVE
ADDRESS
S
1b
ACK
S
MSB LSB
ChargerStatus() =
0x13
1b
8 bits
ACK
COMMAND
BYTE
1b
ACK
1
MSB LSB
Preset to
0b0001001
1b
7 bits
R
SLAVE
ADDRESS
MSB LSB
D7 D0
1b
8 bits
ACK
LOW
DATA
BYTE
P
MSB LSB
D15 D8
1b
8 bits
NACK
HIGH
DATA
BYTE
Preset to
0b0001001
D7 D0
D15 D8
ChargerMode() = 0x12
ChargingCurrent() = 0x14
ChargerVoltage() = 0x15
AlarmWarning() = 0x16
1b
ACK
S
MSB LSB
1b
8 bits
ACK
COMMAND
BYTE
0
MSB LSB
1b
7 bits
W
SLAVE
ADDRESS
S
MSB LSB
1b
7 bits
ACK
LOW
DATA
BYTE
P
MSB LSB
1b
8 bits
ACK
HIGH
DATA
BYTE
a) Write-Word Format
b) Read-Word Format
Legend:
S = Start Condition or Repeated Start Condition
ACK = Acknowledge (logic low)
W
= Write Bit (logic low)
P = Stop Condition
NACK = NOT Acknowledge (logic high)
R = Read Bit (logic high)
MASTER TO SLAVE
SLAVE TO MASTER
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相關代理商/技術參數
參數描述
MAX1667EAP 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1667EAP+ 功能描述:電池管理 Level 2 Smart Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1667EAP+T 功能描述:電池管理 Level 2 Smart Battery Charger RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1667EAP-T 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX1667EVKIT 制造商:Maxim Integrated Products 功能描述:CHEMISTRY INDEPENDENT, LEVEL 2 SMART BATTERY - Bulk
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