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参数资料
| 型号： | DS2703U |
| 英文描述： | SHA-1 Battery Pack Authentication IC |
| 中文描述： | SHA - 1的电池组认证IC |
| 文件页数： | 9/20页 |
| 文件大小： | 238K |
| 代理商： | DS2703U |
DS2703 SHA-1 Battery Pack Authentication IC
9 of 20
Table 5. 1-Wire Speed Control Function Commands
COMMAND
HEX
FUNCTION
Clear Overdrive
8D
Clears the Overdrive 1-Wire Speed bit to select Standard 1-Wire
timings
Sets the Overdrive 1-Wire Speed bit to select Overdrive 1-Wire
timings
Set Overdrive
8B
THERMISTOR MEASUREMENT
The DS2703’s 1-Wire interface allows a thermistor to be multiplexed on the DQ line for thermal measurements of
the cell pack without adding an additional pack connection. See the Typical Operating Circuit, Figure 5. The
thermistor is connected between the DQ and THM pins. THM is normally high impedance to prevent the thermistor
from interfering with 1-Wire communication. When an Activate THM command is received, THM is internally driven
to VSS and the DQ pin becomes high impedance allowing the thermistor resistance to be measured. See the
timing diagram in Figure 12.
Figure 2. Thermistor Mode Duration when C
VB
is .22μF
0
200
400
600
800
1000
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
The DS2703 will remain in thermistor measurement mode until the stored charge on the VB pin capacitor is
depleted causing the IC to power cycle back to standard mode of operation. While in thermistor measurement
mode, communication to the DS2703 is not possible. After measuring the thermistor, the host must wait until the
VB capacitor is depleted. Figure 2 shows the typical and worst case transition times over the full operating range
when using .22
μ
F as the VB pin capacitor. Thermistor measurements should be made within the first 100ms after
issuing the command. The host system should then wait until at least 1000ms have passed before sending the next
communication sequence to the IC.
Normal Mode of
Operation Restored
Worst Case Quickest
Transition Time
Worst Case Slowest
Transition
Typical Transition
Time
Valid Thermistor
Measurement Period
T
DQ Pullup Voltage (V)
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PDF描述 |
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| DS2703UR | SHA-1 Battery Pack Authentication IC |
| DS2703UT | SHA-1 Battery Pack Authentication IC |
| DS2715 | NiMH Battery Pack Charge Controller |
| DS2715Z | NiMH Battery Pack Charge Controller |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2703U/T&R | 制造商:Maxim Integrated Products 功能描述:BATT PACK ID W/SHA-1 8PIN USOP T&R - Tape and Reel |
| DS2703U+ | 功能描述:电池管理 SHA-1 Battery Pack Authentication RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2703U+R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Battery Pack Authentication IC |
| DS2703U+T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Battery Pack Authentication IC |
| DS2703U+T&R | 制造商:Maxim Integrated Products 功能描述:LI-ION 8PIN UMAX - Tape and Reel 制造商:Maxim Integrated Products 功能描述:BATT PACK ID W/SHA-1 8PIN USOP T&R 制造商:Maxim Integrated Products 功能描述:IC BATT AUTHENTICATE SHA-1 8UMAX |
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