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| 型号： | LTC4110EUHF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 21/52页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY BACKUP MANAGER 38-QFN |
| 标准包装： | 2,500 |
| 功能： | 备份管理 |
| 电池化学： | 铅酸，锂离子，锂聚合物，镍镉，镍氢，超级电容器 |
| 电源电压： | 4.5 V ~ 19 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 带卷 (TR) |
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LTC4110
OPERATION
PWM
STOPPED
(BATTERY OVP)
RESET
4
ANY
CHARGE
STATE
7
8
1
2
9
ANY
RESUME
CHARGE
STATE
CHARGE
STATE
CHARGE
3
STOP
4110 F05
5
6
STOP
(OVERTEMPERATURE)
Figure 5. SLA Charge State Diagram (Does Not Include Calibration)
#
1
2
3
Logic Event (T = True, F = False) [Notes]
RES_OR = F & DCDIV pin = T & SHDN pin = F & CHARGE_INHIBITED = F &
CHG_FLT = F
V AR = T [AutoRestart]
Or
ChargingVoltage() & ChargingCurrent() ≠ 0 sent
ChargingVoltage() or ChargingCurrent() = 0 sent
Or
RESET_TO_ZERO = T [See ChargeMode()]
Or
CHARGE_INHIBIT = T [See ChargeMode()]
Notes and/or Actions (T = True, F = False)
I CHG = On & CHG = T
ALARM_INHIBITED = F
I CHG = Off & CHG = F
4
5
6
7
8
9
Or
Or
Or
Or
Or
Or
Or
DCDIV pin = F
RES_OR = T [Bat Removed, See ChargeStatus()]
SHDN pin = T
V UVD = T
POR_RESET = T [See ChargeMode()]
RES_HOT = T & RES_UR = F [See ChargeStatus()]
RES_HOT = F [See ChargeStatus()]
V BOV = T
V BOV = F
AlarmWarning() command is sent by Smart Battery over SMBus with any of
the following bits set to True:
OVER_CHARGED_ALARM
TERMINATE_CHARGE_ALARM
Reserved ALARM
OVER_TEMPERATURE_ALARM
I CHG = Off & CHG = F & CHARGE_INHIBITED = F &
ALARM_INHIBITED = F
I CHG = Off & CHG_FLT = T
I CHG = On & CHG_FLT = F
PWM stopped. Timers remain running.
PWM restarted.
I CHG = Off & CHG = F & ALARM_INHIBITED = T
(ALARM_INHIBITED bit is found in ChargeStatus())
Note: For all charge states, V CHG is always active
be set to indicate calibration in progress. Soft-start ramps
the discharge current at a rate set by the capacitor on the
I TH pin (typically 10ms with 0.1μF capacitor). A limit to
how far the battery cell voltage will be discharged during
calibration can be programmed with the V CAL pin (Li-Ion
default = 2.75V/cell, lead acid default = 1.93V/cell, Smart
NiMH/NiCd default = 0.95V/cell). When the limit is reached
calibration is terminated, the CAL_COMPLETE bit in the
BBuStatus() register is set, the CAL_ON bit in the BBuS-
tatus() register will be cleared and the charge mode is
automatically entered to begin recharging the battery. If
the GPIO3 is con?gured as a calibration complete status
output (CAL_COMPLETEb), it will be forced low until reset
by the CAL_RESET write bit. Calibration is inhibited during
backup or shutdown modes. Calibration is also inhibited
when a thermistor is sensed absent.
During calibration, user-programmable supply back-drive
protections are provided. These protections prevent a
reversal of current into the main supply and/or possibly
raising the supply voltage to unsafe levels should the
4110fb
21
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