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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)： | 6/12頁 |
| 文件大?。?/td> | 136K |
| 代理商： | MAX1612 |
M
_______________Detailed Desc ription
The MAX1612/MAX1613 manage the bridge battery
(auxiliary battery) in portable systems. These devices
consist of a timer block that monitors the charging
process, a linear regulator for supplying IC power and
external circuitry to the MAX1612/MAX1613, and a DC-
DC step-up converter that powers the system when the
main battery is removed (Figure 1). The boost DC-DC
converter reduces the number of bridge-battery cells
required to supply the system’s DC-DC converter.
When the main supply is present, the DC-DC converter
is inactive, reducing the drain on the main battery to
only 18μA. However, if the main battery voltage falls (as
detected by the low-battery comparator), the bridge
battery becomes the input source.
The MAX1612/MAX1613 have an internal linear regula-
tor set at +5V (MAX1612) or +3.3V (MAX1613). The lin-
ear regulator can deliver a load up to 10mA, making it
capable of powering external components such as a
microcontroller (Figure 4). An undervoltage lockout fea-
ture disables the device when the input voltage falls
below the operating range, preventing the DC-DC con-
verter from inadvertently powering up.
The MAX1612/MAX1613 feature an internal counter
intended to track the charging and discharging
process. The counter tracks the charge on the bridge
battery, allowing trickle charge to terminate when the
maximum charge is achieved. The charging rate is
determined by current through the ISET switch, and
limited by the switch’s maximum current specification
as well as by the bridge cell’s charging capability. As
Bridge-Battery Bac kup Controllers
for Notebooks
6
_______________________________________________________________________________________
N-CHANNEL
PGND
V
CHARGE
V
MAIN
R
ISET
L1
ISET
LRI
BBATT
V
BBATT
LX
FB
D1
R1
R2
R3
C
OUT
LBI
DISCHARGE
OSCILLATOR
TIMER BLOCK
CHARGE/DISCHARGE
COUNTER
CHARGE
OSCILLATOR
2.0V
REFERENCE
+3.3/+5V
LINEAR REGULATOR
1.8V/2.0V
BBON
R
BBON
DCMD
CCMD
FULL
CD
CC
C
CD
C
CC
GND
LRO
TOEXTERNAL
LOADS
LBO
TOMAIN
DC-DC
MAX1612
MAX1613
PULSE-
FREQUENCY
MODULATION
CONTROL
BLOCK
Figure 1. Functional Diagram
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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)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(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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