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參數(shù)資料
| 型號(hào)： | U2402B-X |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDIP18 |
| 封裝： | DIP-18 |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 294K |
| 代理商： | U2402B-X |
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U2402B
Rev. A4, 08-Nov-99
4 (18)
General Description
The integrated circuit, U2402B, is designed for charging
Nickel-Cadmium (NiCd) and Nickel-Metal-Hydride
(NiMH) batteries. Fast charging results in voltage lobes
when fully charged (figure 5). It supplies two identifica-
tions ( i. e., + d2V/dt2, and –
DV) to end the charge
operation at the proper time.
As compared to the existing charge concepts where the
charge is terminated
* after voltage lobes * according
to –
DV and temperature gradient identification, the
U2402B takes into consideration the additional changes
in positive charge curves, according to the second deriva-
tive of the voltage with respect to time (d2V/dt2). The
charge identification is the sure method of switching off
the fast charge before overcharging the battery. This helps
to give the battery a long life by hindering any marked
increase in cell pressure and temperature.
Even in critical charge applications, such as a reduced
charge current or with NiMH batteries where weaker
charge characteristics are present multiple gradient con-
trol results in very efficient switch-off.
An additional temperature control input increases not
only the performances of the charge switching character-
istics but also prevents the general charging of a battery
whose temperature is outside the specified window.
A constant charge current is necessary for continued
charge-voltage characteristic. This constant current regu-
lation is achieved with the help of internal amplifier phase
control and a simple shunt-current control technique.
All functions relating to battery management can be
achieved with DC-supply charge systems. A DC-DC-
converter or linear regulator should take over the function
of power supply. For further information please refer to
the applications.
shorted batteries ignored
check
Battery insertion
Battery
monitoring
voltage
5 V
formation
Battery
–
DV
t
) d
2V
dt2
t2
v 20 min
V10
–
DV, ) d
2V
dt2
, active
t1 = 5 min
Fast charge rate IO
Top off
charge rate
1/4 IO
Trickle
charge rate
1/256 IO
Gradient recognition
–
DV
Figure 5. Charge function diagram, fosc = 800 Hz
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| U2403B-M | 功能描述:IC TIMER/CURRENT-CHARGE 8-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| U2403B-MFP | 功能描述:IC TIMER/CURRENT-CHARGE 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
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