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MAX1538

更新时间： 2024-11-26 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
22页 492K
描述
电源选择器，用于双电池系统

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中文翻译

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MAX1538 数据手册

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19-3169; Rev 0; 1/04  
Power-Source Selector for  
Dual-Battery Systems  
General Description  
Features  
The MAX1538 selector provides power-source control  
for dual-battery systems. The device selects between  
an AC adapter and dual batteries based on the pres-  
ence of the three power sources and the state of  
charge of each battery. The MAX1538 includes analog  
comparators to detect AC/airline-adapter presence and  
determine battery undervoltage. Fast analog circuitry  
allows the device to switch between power sources to  
implement a break-before-make time, which allows hot  
swapping of battery packs. The MAX1538 indepen-  
dently performs power-source monitoring and selec-  
tion, freeing the system power-management µP for  
other tasks. This simplifies the development of µP  
power-management firmware and allows the µP to enter  
standby, reducing system power consumption.  
♦ Automatically Detects and Responds to  
Low-Battery Voltage Condition  
Battery Insertion and Removal  
AC-Adapter Presence  
Airline-Adapter Presence  
♦ Step-Down and Step-Up Charger Compatibility  
♦ Fast Break-Before-Make Selection  
Allows Hot Swapping of Power Sources  
No External Schottky Diodes Needed  
♦ 50µA Maximum Battery Quiescent Current  
♦ Implements Battery Capacity Relearning  
♦ Allows Usage of Aircraft Supply  
♦ Direct Drive of P-Channel MOSFETs  
The MAX1538 supports “relearn mode,” which allows  
the system to measure and fully utilize battery capacity.  
In this state, the part allows the selected battery to be  
discharged even when an AC adapter is present. The  
MAX1538 can also be used to power the system in an  
aircraft. On detecting an airline adapter, the MAX1538  
automatically disables charging or discharging of bat-  
tery packs and only allows the system to be powered  
from the adapter.  
♦ Simplifies Power-Management µP Firmware  
♦ 4.75V to 28V AC-Adapter Input Voltage Range  
♦ Small 28-Pin Thin QFN Package (5mm x 5mm)  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX1538ETI  
-40°C to +85°C  
28 Thin QFN  
The MAX1538 is available in a space-saving 28-pin thin  
QFN package with a maximum footprint of 5mm x 5mm.  
Typical Operating Circuit  
Applications  
Notebook and Subnotebook Computers  
ACDET  
CHRG  
AIRDET  
BATSEL  
Internet Tablets  
RELRN  
ADPIN  
OUT2  
Dual-Battery Portable Equipment  
OUT1  
REVBLK  
OUT0  
EXTLD  
BATTERY  
CHARGER  
MAX1538  
ADPBLK  
V
DD  
CHG_OUT  
CHGIN  
CHGA  
MINVA  
MINVB  
Pin Configuration appears at end of data sheet.  
CHGB  
DISB  
GND  
DISA  
BATB  
BATA  
BATSUP  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...22

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MAX1538ETI MAXIM

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 		Power-Source Selector for Dual-Battery Systems
MAX1538ETI+ MAXIM

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 		Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
MAX1538ETI-T MAXIM

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 		Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
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MAX153C/D MAXIM

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 		1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP MAXIM

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 		1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP+T MAXIM

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 		ADC, Flash Method, 8-Bit, 1 Func, 1 Channel, Parallel, 8 Bits Access, CMOS, PDSO20, SSOP-2
MAX153CAP-T MAXIM

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 		ADC, Flash Method, 8-Bit, 1 Func, 2 Channel, Parallel, 8 Bits Access, CMOS, PDSO20, SSOP-2
MAX153CPP MAXIM

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 		1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CPP+ MAXIM

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 		ADC, Flash Method, 8-Bit, 1 Func, 2 Channel, Parallel, 8 Bits Access, CMOS, PDIP20, 0.300

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