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参数资料
| 型号： | LTC1325CN#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MANAGMNT SYSTEM 18DIP |
| 标准包装： | 20 |
| 功能： | 充电管理 |
| 电池化学： | 铅酸，锂离子，镍镉，镍氢 |
| 电源电压： | 4.5 V ~ 16 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 18-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 18-DIP |
| 包装： | 管件 |
LTC1325
APPLICATIO N S I N FOR M ATIO N
3. The MSBF bit is set depending on whether the micro-
processor clocks in serial data with MSB- or LSB-first.
4. The DS0 to DS2 bits can be anything except when
entering idle mode or when requesting for ADC read-
ings. In these cases, DS0 to DS2 are set to select the
desired reading: T BAT , V CELL or T AMB .
5. The PS bit should always be 0 so that the LTC1325
does not go into shutdown mode.
6. The DR0 to DR2 should not select any of the test modes.
It may assume different settings between Fast charge
and Top Off charge in order to alter the charging current.
7. The FSCLR bit should be set to 1 to clear any faults and
reset the timer when starting Discharge, Fast charge
or Top Off. The status bits that the LTC1325 returns
START
during the same I/O operation (that FSCLR is set to 1)
should be checked to determine if faults were indeed
cleared, i.e., discharging or charging has begun. This
is not shown in the simplified flowchart of Figure 6.
For commands other than the START commands,
FSCLR should be set to 0 so as not to reset the timer.
8. The TO0 to TO2 bits should all be set to 1 in discharge
mode to ensure discharge does not end prematurely
due to a timeout fault. During Fast charge or Top Off
charge, these bits are set to a value suitable for the
charge rate used. For example, if the charge rate is 1C,
the timeout period should be set to 80 minutes.
9. In charge mode, the C F capacitor filters the V CELL node
and sees a small ripple due to ripple at the Sense pin.
Prior to taking an ADC reading, the LTC1325 is put in
NO
CONDITIONING?
YES
START
DISCHARGE
START
WAIT
READ
STATUS
TOP OFF CHARGE
WAIT
NO
EDV = 1?
YES
RESUME
TOP OFF CHARGE
IDLE MODE
READ ADC
AND STATUS
START
FAST CHARGE
WAIT
NO
TERMINATE?
YES
IDLE MODE
RESUME
FAST CHARGE
IDLE MODE
AND WAIT
AND WAIT
READ ADC
AND STATUS
MORE
CONDITIONING?
NO
YES
NO
TERMINATE?
YES
END
LTC1325 ? F06
Figure 6. Simple Charging Algorithm
21
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