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| 型号： | DS2764AE+025 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC MON BATT LI-ION HP 16-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 功能： | 电池监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
DS2764 High-Precision Li+ Battery Monitor With 2-Wire Interface
Overcurrent, Charge Direction. The voltage difference between the IS1 pin and the IS2 pin (V IS = V IS1 - V IS2 ) is the
filtered voltage drop across the current-sense resistor. If V IS exceeds overcurrent threshold V OC for a period longer
than overcurrent delay t OCD , the DS2764 shuts off both external FETs and sets the COC flag in the protection
register. The charge current path is not re-established until the voltage on the PLS pin drops below V DD - V TP . The
DS2764 provides a test current of value I TST from PLS to V SS to pull PLS down to detect the removal of the
offending charge current source.
Overcurrent, Discharge Direction. If V IS is less than -V OC for a period longer than t OCD , the DS2764 shuts off the
external discharge FET and sets the DOC flag in the protection register. The discharge current path is not re-
established until the voltage on PLS rises above V DD - V TP . The DS2764 provides a test current of value I TST from
V DD to PLS to pull PLS up to detect the removal of the offending low-impedance load.
Short Circuit. If the voltage on the SNS pin with respect to V SS exceeds short-circuit threshold V SC for a period
longer than short-circuit delay t SCD , the DS2764 shuts off the external discharge FET and sets the DOC flag in the
protection register. The discharge current path is not re-established until the voltage on PLS rises above V DD - V TP .
The DS2764 provides a test current of value I TST from V DD to PLS to pull PLS up to detect the removal of the short
circuit.
Figure 4. Li+ Protection Circuitry Example Waveforms
V OV
V CELL
V CE
V UV
CHARGE
V IS
DISCHARGE
(NOTE 1)
V OC
0
-V OC
-V SC
CC
DC
t OVD
t SCD
t OVD
t OCD
t OCD
t UVD
V PLS
V SS
V DD
V SS
MODE
ACTIVE
SLEEP
NOTE 1: TO ALLOW THE DEVICE TO REACT QUICKLY TO SHORT CIRCUITS, DETECTION OCCURS ON THE SNS PIN RATHER THAN ON THE
FILTERED IS1 AND IS2 PINS. THE ACTUAL SHORT-CIRCUIT DETECT CONDITION IS V SNS > V SC .
Summary. All of the protection conditions described above are OR’ed together to affect the CC and DC outputs.
DC = (Undervoltage) or (Overcurrent, Either Direction) or (Short Circuit) or (Protection Register Bit DE = 0)
or (Sleep Mode)
CC = (Overvoltage and V IS ≥ -2mV) or (Undervoltage) or (Overcurrent, Charge Direction) or (Protection
Register bit CE = 0) or (Sleep Mode)
Soft Startup. The discharge protection FET is turned on slowly when the DS2764 enters Active mode from Sleep.
The soft startup reduces the inrush current that normally occurs when a battery pack is inserted into an un-powered
host system. Soft Startup does not reduce inrush currents if the DS2764 is already in Active mode when the
battery pack is connected to the un-powered system.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2764AE-025/R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AE-025/T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AE-025/T&R | 制造商:Maxim Integrated Products 功能描述:LI+BATT MNTR2WIRE 4.275OV16P TSSOP - Tape and Reel |
| DS2764AE-025/T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
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