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參數(shù)資料
| 型號： | DS2760AX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA14 |
| 封裝： | FLIPCHIP-14 |
| 文件頁數(shù)： | 22/25頁 |
| 文件大?。?/td> | 289K |
| 代理商： | DS2760AX |
DS2760
6
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 VUV for tUVD (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
Activation
Condition
Name
Threshold
Delay
Response
Release
Threshold
Overvoltage
VIN > VOV
tOVD
CC high
VIN < VCE
Undervoltage
VIN < VUV
tUVD
CC , DC high,
Sleep Mode
VPLS > VDD
(1)
(charger connected)
Overcurrent, Charge
VIS > VOC
(2)
tOCD
CC , DC high
VPLS < VDD – VTP
(3)
Overcurrent, Discharge
VIS < -VOC
(2)
tOCD
DC high
VPLS > VDD – VTP
(4)
Short Circuit
VSNS > VSC
tSCD
DC high
VPLS > VDD – VTP
(4)
VIS = VIS1 – VIS2. Logic high = VPLS for CC and VDD for DC. All voltages are with respect to VSS. ISNS
references current delivered from pin SNS.
(1) If VDD <2.2V, release is delayed until the recovery charge current (IRC) passed from PLS to VDD
charges the battery and allows VDD to exceed 2.2V.
(2) for the internal sense resistor configuration, the overcurrent thresholds are expressed in terms of
current: ISNS > IOC for charge direction and ISNS < -IOC for discharge direction
(3) with test current ITST current flowing from PLS to VSS (pull-down on PLS)
(4) with test current ITST current flowing from VDD to PLS (pull-up on PLS)
Overvoltage. If the voltage of the cell exceeds overvoltage threshold VOV for a period longer than
overvoltage delay tOVD, 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 VCE, the DS2760 turns the
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS2760AX/T&R | 制造商:Maxim Integrated Products 功能描述:IC BATT MON LI-ION HP FLIPCHIP |
| DS2760AX/T&R | 功能描述:IC BATT MON LI-ION HP FLIPCHIP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| DS2760AX-025 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Precision Li Battery Monitor |
| DS2760BE | 功能描述:IC BATT MON LI-ION HP 16-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| DS2760BE/T&R | 制造商:Maxim Integrated Products 功能描述:IC BATT MON LI-ION HP 16-TSSOP |
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