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參數(shù)資料
| 型號： | DS2720CU/T&R |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | MICRO, SOP-8 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 264K |
| 代理商： | DS2720CU/T&R |
DS2720
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Overvoltage. If the cell voltage sensed at VDD exceeds overvoltage threshold VOV for a period longer
than overvoltage delay tOVD, the DS2720 shuts off the external charge FET and sets the OV flag in the
protection register. Discharging remains enabled during overvoltage. The charge FET is re-enabled
(unless another protection condition prevents it), when the cell voltage falls below charge enable
threshold VCE, or a discharge causes VDD - VPLS > VOC.
Undervoltage. If the cell voltage sensed at VDD drops below undervoltage threshold VUV for a period
longer than undervoltage delay tUVD, the DS2720 shuts off the charge and discharge FETs, sets the UV
flag in the protection register, and enters sleep mode. The DS2720 turns on both the charge and discharge
FETs after the cell voltage rises above VUV and a charger is present.
Short Circuit. If the cell voltage sensed at VDD drops below depletion threshold VSC for a period of tSCD,
the DS2720 shuts off the charge and discharge FETs and sets the DOC flag in the protection register. The
current path through the charge and discharge FETs is not re-established until the voltage on PLS rises
above VDD - VOC. The DS2720 provides a test current through internal resistor RTST from VDD to PLS to
pull up PLS when VDD rises above VSC. The test current allows the DS2720 to detect the removal of the
offending low-impedance load. Additionally, a recovery charge path through RTST from PLS to VDD is
enabled.
Overcurrent. If the voltage across the protection FETs (VDD - VPLS) is greater than VOC for a period
longer than tOCD, the DS2720 shuts off the external charge and discharge FETs and sets the DOC flag in
the protection register. The current path is not re-established until the voltage on PLS rises above VDD -
VOC. The DS2720 provides a test current through internal resistor RTST from VDD to PLS to detect the
removal of the offending low-impedance load.
Overtemperature. If the device temperature exceeds TMAX, the DS2720 immediately shuts off the
external discharge and charge FETs. The FETs are not turned back on until the cell temperature drops
below TMAX AND the host resets the OT bit.
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