参数资料
型号: DS2778G+T&R
厂商: Maxim Integrated Products
文件页数: 13/46页
文件大小: 0K
描述: IC FUEL GAUGE LI+ 2CELL 14-TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
功能: 燃料,电量检测计/监控器
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4 V ~ 9.2 V
工作温度: -20°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-WFDFN 裸露焊盘
供应商设备封装: 14-TDFN-EP(3x5)
包装: 带卷 (TR)
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Table 1. Li+ Protection Conditions and DS2775/DS2776 Responses
CONDITION
THRESHOLD
ACTIVATION
DELAY
RESPONSE
RELEASE THRESHOLD
Both V CELL < V CE or
Overvoltage (OV) (Note 1)
V CELL > V OV
t OVD
CC Off
(V SNS
1.2mV and both
V CELL < V OV ) (Note 1)
Undervoltage (UV) (Note 1)
Overcurrent, Charge (COC)
Overcurrent, Discharge
(DOC)
Short Circuit (SC)
V CELL < V UV
V SNS < V COC
V SNS > V DOC
V SNS > V SC
t UVD
t OCD
t OCD
t SCD
CC Off, DC Off,
Sleep Mode (Note 2)
CC Off, DC Off
DC Off
DC Off
V PLS > V IN2 (charger connected)
or (both V CELL > V UV and
UVEN = 0) (Note 3)
V PLS < V DD – V TP
(charger removed) (Note 4)
V PLS > V DD – V TP
(load removed) (Note 5)
V PLS > V DD – V TP (Note 5)
Note 1: V CELL is defined as (V IN1 - V SS ) or (V IN2 - V IN1 ).
Note 2: Sleep mode is only entered if UVEN = 1.
Note 3: If V CELL < V UV when a charger connection is detected, release is delayed until V CELL ≥ V UV . The recovery charge path pro-
vides an internal current limit (I RC ) to safely charge the battery.
Note 4: With test current I PPD flowing from PLS to V SS (pulldown on PLS) enabled.
Note 5: With test current I TST flowing from V DD to PLS (pullup on PLS).
V OV
V IN
V CE
V UV
DISCHARGE
V SC
V SNS
CHARGE
V DOC
0
-V COC
V OHCC
V CP
CC
t OVD
t OVD
t OCD
t UVD
V DD
V CP
DC
t SCO
t OCD
t UVD
V PLS
POWER
MODE
*IF UVEN = 1.
Figure 3. Li+ Protection Circuitry Example Waveforms
ACTIVE
SLEEP*
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13
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