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参数资料
| 型号： | DS2760BX-025/T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/25页 |
| 文件大小： | 0K |
| 描述： | IC BATT MON LI-ION HP FLIPCHIP |
| 标准包装： | 10,000 |
| 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： | 12-UFBGA，FCBGA |
| 供应商设备封装： | 12-覆晶 |
| 包装： | 带卷 (TR) |
DS2760
POWER MODES
The DS2760 has two power modes: Active and Sleep. While in Active Mode, the DS2760 continually
measures current, voltage and temperature to provide data to the host system and to support current
accumulation and Li+ safety monitoring. In Sleep Mode, the DS2760 ceases these activities. The
DS2760 enters Sleep Mode when any of the following conditions occurs:
§ the PMOD bit in the Status Register has been set to 1 and the DQ line is low for longer than
2 seconds (pack disconnection)
§ the voltage on VIN drops below undervoltage threshold V UV for t UVD (cell depletion)
§ the pack is disabled through the issuance of a SWAP command (SWEN bit =1)
The DS2760 returns to Active Mode when any of the following occurs:
§ the PMOD bit has been set to 1 and the SWEN bit is set to 0 and the DQ line is pulled high
(pack connection)
§
§
§
the PS pin is pulled low (power switch)
the voltage on PLS becomes greater than the voltage on VIN (charger connection) with the SWEN bit
set to 0
the pack is enabled through the issuance of a SWAP command (SWEN bit =1)
The DS2760 defaults to Sleep Mode when power is first applied.
LI+ PROTECTION CIRCUITRY
During Active Mode, the DS2760 constantly monitors cell voltage and current to protect the battery from
overcharge (overvoltage), overdischarge (undervoltage) and excessive charge and discharge currents
(overcurrent, short circuit). Conditions and DS2760 responses are described in the sections below and
summarized in Table 2 and Figure 3.
LI+ PROTECTION CONDITIONS AND DS2760 RESPONSES Table 2
Condition
Name
Activation
Threshold Delay Response
Release
Threshold
Overcurrent, Charge V IS > V OC
Overvoltage VIN > V OV
Undervoltage VIN < V UV
(2)
Overcurrent, Discharge V IS < -V OC(2)
Short Circuit V SNS > V SC
t OVD
t UVD
t OCD
t OCD
t SCD
CC high
CC , DC high,
Sleep Mode
CC , DC high
DC high
DC high
VIN < V CE
V PLS > V DD(1)
(charger connected)
V PLS < V DD – V TP(3)
V PLS > V DD – V TP(4)
V PLS > V DD – V TP(4)
V IS = V IS1 – V IS2 . Logic high = V PLS for CC and V DD for DC . All voltages are with respect to VSS. I SNS
references current delivered from pin SNS.
(1) If V DD <2.2V, release is delayed until the recovery charge current (I RC ) passed from PLS to V DD
charges the battery and allows V DD to exceed 2.2V.
(2) for the internal sense resistor configuration, the overcurrent thresholds are expressed in terms of
current: I SNS > I OC for charge direction and I SNS < -I OC for discharge direction
(3) with test current I TST current flowing from PLS to VSS (pull-down on PLS)
(4) with test current I TST current flowing from V DD to PLS (pull-up on PLS)
Overvoltage. If the voltage of the cell exceeds overvoltage threshold V OV for a period longer than
overvoltage delay t OVD , the DS2760 shuts off the external charge FET and sets the OV flag in the
Protection Register. When the cell voltage falls below charge enable threshold V CE , the DS2760 turns the
6
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