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參數(shù)資料
| 型號： | MAX712EPE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Octal Buffers And Line Drivers With 3-State Outputs 20-CFP -55 to 125 |
| 中文描述： | 0.1 A BATTERY CHARGE CONTROLLER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大小： | 168K |
| 代理商： | MAX712EPE |
M
NiCd/NiMH Battery
Fast-Charge Controllers
_______________________________________________________________________________________
9
The MAX712/MAX713 can be configured so that voltage
slope and/or battery temperature detects full charge.
Figure 4 shows a charging event in which a battery is
inserted into an already powered-up MAX712/MAX713.
During time 1, the charger’s output voltage is regulated
at the number of cells times VLIMIT. Upon insertion of
the battery (time 2), the MAX712/MAX713 detect cur-
rent flow into the battery and switch to fast-charge
state. Once full charge is detected, the device reverts
to trickle charge (time 3). If the battery is removed (time
4), the MAX712/MAX713 remain in trickle charge and
the output voltage is once again regulated as in time 1.
Powering the MAX 712/MAX 713
AC-to-DC wall-cube adapters typically consist of a trans-
former, a full-wave bridge rectifier, and a capacitor.
Figures 10–12 show the characteristics of three con-
sumer product wall cubes. All three exhibit substantial
120Hz output voltage ripple. When choosing an adapter
for use with the MAX712/MAX713, make sure the lowest
wall-cube voltage level during fast charge and full load is
at least 1.5V higher (2V for switch mode) than the maxi-
mum battery voltage while being fast charged. Typically,
the voltage on the battery pack is higher during a fast-
charge cycle than while in trickle charge or while supply-
ing a load. The voltage across some battery packs may
approach 1.9V/cell.
MAX712
MAX713
2N3904
D1
Q1
V+
DRV
DC IN
R1
R2
Figure 5. DRV Pin Cascode Connection (for high DC IN voltage
or to reduce MAX712/MAX713 power dissipation in linear mode)
↑
↑
1
x
x
1
UNDER_VOLTAGE
x
IN_REGULATION
0
x
↑
↑
x
x
x
x
POWER_ON_RESET
↑
1
0
0
0
0
1
1
0
↓
0
0
1
1
0
0
↓
0
1
1
0
x
0
x
1
1
x
↑
x
0
1
1
0
x
↑
x
Table 4. MAX712/MAX713 Charge-State Transition Table
x
x
COLD
x
0
x
1
1
↓
1
1
1
↑
0
x
x
x
x
x
x
HOT
x
x
0
1
1
1
1
1
↑
1
x
0
x
x
↓
No change
No change
Result*
Set trickle
No change
No change***
Set fast
No change
No change
Set fast
Set fast
No change***
Set fast**
Trickle to fast transition inhibited
Trickle to fast transition inhibited
Set trickle
Set trickle
Set trickle
Only two states exist: fast charge and trickle charge.
*Regardless of the status of the other logic lines, a timeout or a voltage-slope detection will set trickle charge.
**If the battery is cold at power-up, the first rising edge on COLD will trigger fast charge; however, a second rising edge will
have no effect.
***Batteries that are too hot when inserted (or when circuit is powered up) will not enter fast charge until they cool and power is recycled.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX712ESE | Octal Buffers And Line Drivers With 3-State Outputs 20-CDIP -55 to 125 |
| MAX712MJE | Octal Buffers And Line Drivers With 3-State Outputs 20-LCCC -55 to 125 |
| MAX713CPE | NiCd/NiMH Battery Fast-Charge Controllers |
| MAX713CSE | NiCd/NiMH Battery Fast-Charge Controllers |
| MAX713EPE | NiCd/NiMH Battery Fast-Charge Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX712EPE+ | 功能描述:電池管理 NiCd/NiMH Battery Fast-Charge Ctlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX712ESE | 功能描述:電池管理 NiCd/NiMH Battery Fast-Charge Ctlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX712ESE+ | 功能描述:電池管理 NiCd/NiMH Battery Fast-Charge Ctlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX712ESE+T | 功能描述:電池管理 NiCd/NiMH Battery Fast-Charge Ctlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX712ESE-T | 功能描述:電池管理 NiCd/NiMH Battery Fast-Charge Ctlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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