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參數(shù)資料
| 型號： | MAX1612 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Bridge-Battery Backup Controllers for Notebooks |
| 中文描述： | 備用橋接電池控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 136K |
| 代理商： | MAX1612 |
M
The counter block can be used to estimate the charge
remaining in the battery. For example, if the maximum
expected charge time is 14 hours (C
CC
= 60nF) and
the maximum expected discharge time is about 2 hours
(C
CD
= 8.6nF), the battery reaches full charge in 14
hours with the FULL pin going high. If the bridge bat-
tery must supply the load for 1 hour, the counter will
decrement down to about half full. Recharging the bat-
tery will now require only 7 hours to reach all 1s in the
counter, signaling with FULL going high.
If both
DCMD
and
CCMD
are pulled low simultaneous-
ly, the counter defaults to the discharge mode. When
the bridge battery is supplying the circuit, it is consid-
ered to be in discharge mode (Table 1).
Charge Current S elec tion (IS ET )
A resistor between ISET and a voltage higher than the
bridge battery sets the charging rate. The switch is
open when
CCMD
is high and is turned on when
CCMD
is pulled low (assuming
DCMD
is high). If the
voltage at ISET falls below 0.4V, the internal counter
resets to all 0s. The internal high-voltage switch has a
typical on-state voltage drop of 1V (Figure 1).
Therefore, the charge current equals:
I
ISET
= [ (V
CHARGE
- V
BBATT
) - 1V] / R
ISET
Linear-Regulator Output (LRO)
The linear-regulator output, LRO, is set at +5.0V for the
MAX1612 and at +3.3V for the MAX1613, with a toler-
ance of ±6%. For powering external circuitry such as
the microcontroller shown in Figure 4, LRO is guaran-
teed to deliver up to 10mA while maintaining regulation.
If the voltage at the linear-regulator input falls below the
operating range, an undervoltage-lockout feature shuts
down the entire device.
Bridge-Battery Bac kup Controllers
for Notebooks
8
_______________________________________________________________________________________
DCMD
CCMD
COUNTER
ISET SWITCH
0
0
Count Down
Off
0
1
Count Down
Off
1
0
Count Up
On
1
1
No Count
Off
Table 1.
CCMD
,
DCMD
Truth Table
MAX1612
MAX1613
LX
MAIN
BATTERY
22
μ
H
22
μ
F
2.2k
160k
470k
+5V/3.3V
470k
1
μ
F
0.33
μ
F
100
μ
F
ALWAYS-ON
OUTPUT
BRIDGE
BATTERY
442k
SYSTEM
DC-DC
(MAX1630)
20k
200k
BBATT
MBR0530
PGND
ISET
FB
LBI
GND
CD
CC
4.7nF
68nF
BBON
DCMD
LBO
CCMD
FULL
LRO
Figure 3. Stand-Alone Application
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1613EEE | Bridge-Battery Backup Controllers for Notebooks |
| MAX1612EEE | Bridge-Battery Backup Controllers for Notebooks |
| MAX1614 | High-Side, N-Channel MOSFET Switch Driver |
| MAX1614EUA | High-Side, N-Channel MOSFET Switch Driver |
| MAX1615EUK-T | High-Voltage, Low-Power Linear Regulators for Notebook Computers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX16120AOMA+T | 制造商:Maxim Integrated Products 功能描述:ULTRA-VERSATILE LOW-POWER DUAL/TRIPLE P SUPERVISORY CIRCUITS - Tape and Reel |
| MAX16121BHIB+T | 制造商:Maxim Integrated Products 功能描述:ULTRA-VERSATILE LOW-POWER DUAL/TRIPLE P SUPERVISORY CIRCUITS - Tape and Reel |
| MAX16125WTAN16+T | 功能描述:監(jiān)控電路 Dual Pushbutton Controller RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16125WTDB29+T | 功能描述:監(jiān)控電路 Dual Pushbutton Controller RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16125WTEJ00+T | 功能描述:監(jiān)控電路 Dual Pushbutton Controller RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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