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参数资料
| 型号： | LTC4008EGN-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER CTRLR 4A 20SSOP |
| 标准包装： | 55 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1341 (CN2011-ZH PDF) |
LTC4008
OPERATION
The thermistor detector performs a sample-and-hold
function. An internal clock, whose frequency is determined
by the timing resistor connected to R T , keeps switch S1
closed to sample the thermistor:
t SAMPLE = 127.5 ? 20 ? R RT ? 17.5pF = 6.7ms,
for R RT = 150k
The external RC network is driven to approximately 4.5V
and settles to a ?nal value across the thermistor of:
This voltage is stored by C7. Then the switch is opened
for a short period of time to read the voltage across the
thermistor.
t HOLD = 10 ? R RT ? 17.5pF = 26μs,
for R RT = 150k
When the t HOLD interval ends the result of the thermistor
testing is stored in the D ?ip-?op (DFF). If the voltage at
NTC is within the limits provided by the resistor divider
V RTH ( FINAL ) =
4 .5V ? R TH
R TH + R 10
CLK
(NOT TO
SCALE)
VOLTAGE ACROSS THERMISTOR
feeding the comparators, then the NOR gate output will
be low and the DFF will set T BAD to zero and charging will
continue. If the voltage at NTC is outside of the resistor
divider limits, then the DFF will set T BAD to one, the charger
will be shut down, FAULT pin is set low and the timer will
be suspended until T BAD returns to zero (see Figure 4).
t SAMPLE
t HOLD
COMPARATOR HIGH LIMIT
V NTC
COMPARATOR LOW LIMIT
4008 F04
Figure 4
4008fb
12
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| LTC4008EGNPBF | 制造商:Linear Technology 功能描述:4A, High Eff Li-Ion Charger LTC4008EGN |
| LTC4009 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage High Current Controller for Battery Charging and Power Management |
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| LTC4009CUF#PBF | 功能描述:IC CHARGER BATTERY MC 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
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