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參數(shù)資料
| 型號： | MAX1612EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Bridge-Battery Backup Controllers for Notebooks |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PTICH, QSOP-16 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 136K |
| 代理商： | MAX1612EEE |
Low-Battery Comparator (LBI,
LBO
)
The MAX1612/MAX1613 feature a low-battery com-
parator with a factory-preset 1.8V threshold. This com-
parator is intended to monitor the main high-voltage
battery. As the voltage falls below 1.8V, the open-drain
LBO
output sinks current. With 200mV of hysteresis, the
output will not go high until V
LBI
exceeds 2.0V.
LBO
can easily be connected to
BBON
to start the DC-DC
converter when V
LBI
< 1.8V (stand-alone application,
Figure 3). Figure 4 shows an application using a micro-
controller, where
LBO
alerts the microcontroller to the
falling voltage and pulls
BBON
low through an external
resistor to start the DC-DC converter while also pulling
DCMD
low to start the counter.
BBON
Control Input
The
BBON
input serves two functions: setting the peak
LX switch current, and enabling the DC-DC converter.
The control signal is normally applied to R
BBON
rather
than at the pin itself. The peak LX switch current is
directly proportional to and 42,000 times greater than
the current through R
BBON
(see Typical Operating
Characteristics). The
BBON
pin is internally regulated
to 2V, so that when the control input is forced low, the
voltage across R
BBON
is 2V.
When driving
BBON
from external logic, ensure the low
state has minimal noise. Otherwise, drive R
BBON
with
an N-channel FET whose source is returned directly to
GND (Figure 2).
Applic ations Information
Design Proc edure
The following section refers to the Functional Diagram
of Figure 1.
Step 1:
Select the output voltage and maximum output
current for the boost DC-DC converter. Generally,
choose an output voltage high enough to run the main
system’s buck DC-DC converters. Assuming the maxi-
mum battery capacity is 50mAh (Sanyo 1.2V N-50AAA),
the following equations can help the design process:
I
PEAK
= 2
·
I
OUT
·
(V
OUT
+ V
D
) / (V
BBATT
- V
RDSON
)
I
IN
= 0.5
·
I
PEAK
M
Bridge-Battery Bac kup Controllers
for Notebooks
_______________________________________________________________________________________
9
MAX1612
MAX1613
LX
MAIN
BATTERY
15
μ
H
20
μ
F
2.4k
250k
470k
470k
47
μ
F
1
μ
F
BRIDGE
BATTERY
V
CC
MICROCONTROLLER
I/O
I/O
I/O
I/O
I/O
I/O
750k
SYSTEM
DC-DC
(MAX1630)
35.2k
479.1k
BBATT
MBR0530
PGND
ISET
FB
LBI
GND
CD
CC
0.01
μ
F
0.1
μ
F
BBON
LRO
LBO
FULL
DCMD
CCMD
0.33
μ
F
2N7002*
*OPTIONAL, TORESET COUNTER
Figure 4. Microcontroller-Based Application
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| MAX1614EUA | High-Side, N-Channel MOSFET Switch Driver |
| MAX1615EUK-T | High-Voltage, Low-Power Linear Regulators for Notebook Computers |
| MAX1616EUK-T | High-Voltage, Low-Power Linear Regulators for Notebook Computers |
| MAX1615 | 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 |
|---|---|
| MAX1612EEE+ | 功能描述:電池管理 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 |
| MAX1612EEE+T | 功能描述:電池管理 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 |
| MAX1612EEE-T | 功能描述:電池管理 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 |
| MAX1612EVKIT | 功能描述:電源管理IC開發(fā)工具 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX16131WTNN00+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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