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MAX1874ETE

更新时间： 2024-02-10 22:01:31
品牌 Logo 应用领域
美信 - MAXIM 电池
页数 文件大小 规格书
16页 404K
描述
Dual-Input, USB/AC Adapter, 1-Cell Li+ Charger with OVP and Thermal Regulation

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MAX1874ETE 数据手册

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19-2912; Rev 0; 7/03  
Dual-Input, USB/AC Adapter, 1-Cell  
Li+ Charger with OVP and Thermal Regulation  
General Description  
Features  
The MAX1874 charges a single-cell Li+ battery from  
both USB and AC adapter sources. It also includes bat-  
tery-to-input power switchover, so the system can be  
powered directly from the power source rather than  
from the battery.  
ꢀ Charge from USB* or AC Adapter  
ꢀ Automatic Switchover to AC Adapter  
ꢀ Thermal Limiting Simplifies Board Design  
ꢀ Small, High-Power 16-Pin Thin QFN Package  
ꢀ Input Protection Up to 18V  
In its simplest application, the MAX1874 needs no  
external MOSFET or diodes, and accepts input volt-  
ages up to 6.5V; however, DC input overvoltage protec-  
tion up to 18V can be added with a single SOT PFET.  
ꢀ Soft-Start  
ꢀ Automatic Battery-to-Input Load Switch  
*Protected by U.S. Patent #6,507,172.  
On-chip thermal limiting simplifies PC board layout and  
allows optimum charging rate without the thermal limits  
imposed by worst-case battery and input voltage. When  
the MAX1874 thermal limit is reached, the charger does  
not shut down but simply reduces charging current.  
Ordering Information  
PART  
TEMP RANGE PIN-PACKAGE  
Ambient or battery temperature can be monitored with  
an external thermistor. When the temperature is out of  
range, charging pauses.  
MAX1874ETE -40 C to +85 C 16 Thin QFN 5mm x 5mm  
Typical Operating Circuit  
Other features include a CHG output to indicate when  
battery current tapers below a predetermined level. DC  
power-OK (DCOK), USB power-OK (UOK), and power-  
on (PON) outputs indicate when valid power is present.  
These outputs drive logic or power-selection MOSFETs  
to disconnect the charging sources from the load and  
to protect the MAX1874 from overvoltage.  
DC INPUT  
DC  
PON  
MAX1874  
The MAX1874 contains no logic for communication with  
the USB host. It must receive instructions from a local  
microcontroller. The MAX1874 is available in a 16-pin  
5mm ✕ 5mm thin QFN package and operates over the  
-40°C to +85°C temperature range.  
DCOK  
DCLV  
BATT  
Li+  
CELL  
UOK  
USB  
Applications  
CHG  
USEL  
EN  
USB INPUT  
TO REF  
PDAs  
Cell Phones  
500mA  
100mA  
Wireless Appliances Digital Cameras  
DCI  
Pin Configuration  
REGULATOR  
REF  
TOP VIEW  
16 15 14 13  
THRM  
GND  
DCLV  
1
2
3
4
12 USB  
11 BYP  
10 PGND  
DC  
CHG  
NTC  
THERMISTOR  
MAX1874  
USEL  
9
REF  
BYP  
PGND  
5
6
7
8
THIN QFN  
5mm x 5mm  
Functional Diagram appears at the end of the data sheet.  
________________________________________________________________ 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...16

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MAX1874ETE 替代型号

型号 品牌 替代类型 描述 数据表
MAX1874ETE+T MAXIM

完全替代

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MAX1874ETE-T MAXIM

功能相似

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