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參數(shù)資料
| 型號： | DS2770 |
| 英文描述： | Battery Monitor and Charge Controller |
| 中文描述： | 電池充電控制器監(jiān)控 |
| 文件頁數(shù)： | 8/27頁 |
| 文件大?。?/td> | 272K |
| 代理商： | DS2770 |
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DS2770
8 of 27
RECHARGEABLE LITHIUM PULSE CHARGING
Figure 3
NiMH CHARGER OPERATION
During NiMH charging, charge current from a constant current or current-limited supply is gated to the
battery under control of UV and CC pins. Since the transition from trickle charge to fast charge occurs
when the battery reaches 3.0V, a three-cell NiMH battery will begin fast charge at 1.0V per cell. A
voltage divider can be used to adjust the transition point to a higher per cell voltage, though values in the
Voltage Measurement Register would be affected by the divider ratio.
At the start of fast charge, the DS2770 uses the most recent temperature measurement to determine the
appropriate dT/dt termination rate for the ambient conditions from Table 2 below. During the first 5
minutes, temperature rate termination is blanked to avoid false dT/dt detection due to I
2
R heating. After
the blanking period, dT/dt detection begins using one of the initial rates from Table 2 and requires that the
rate of temperature rise continue at or above the selected rate for 2.8 minutes. Internally, values from the
Temperature Measurement Register are averaged in determining the sustained rate of temperature rise.
The effective rate shown in Table 2 is based on NiMH charge data and represents the predicted
instantaneous dT/dt rate at termination.
NiMH CHARGE TERMINATION THRESHOLDS
Table 2
dT/dt THRESHOLD
INITIAL
( C/MIN)
0.30
0.45
0.60
AMBIENT
TEMPERATURE ( C)
EFFECTIVE
( C/MIN)
1.0
1.0
1.0
0 to +5
+5 to +15
+15 to +40
t
CD
Complete
Charge
Pulse Charge
Charge
Trickle
VIN
t
VCV
CC
UV
LB
CV
V
V
Pulse
Region
Bulk
Region
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2770AE | Battery Monitor and Charge Controller |
| DS2770AE-025 | Battery Monitor and Charge Controller |
| DS2770BE | Battery Monitor and Charge Controller |
| DS28E04-100 | 4096-Bit Addressable 1-Wire EEPROM with PIO |
| DS28E04S-100 | 4096-Bit Addressable 1-Wire EEPROM with PIO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2770AE | 制造商:Maxim Integrated Products 功能描述:BAT MONITOR CHARGE CNTRL VCV=4.1 - Rail/Tube |
| DS2770AE/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller |
| DS2770AE/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller |
| DS2770AE/T&R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller |
| DS2770AE/TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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