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| 型号： | MAX1874ETE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC LI+ CHARGER DUAL-IN 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.35 V ~ 6.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
19-2912; Rev 1; 2/07
ATION
ILABLE
EVALU
AVA
KIT
Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
General Description
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.
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.
On-chip thermal limiting simplifies printed circuit board
(PCB) 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
Features
? 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
? Soft-Start
? Automatic Battery-to-Input Load Switch
Ordering Information
reduces charging current.
Ambient or battery temperature can be monitored with
an external thermistor. When the temperature is out of
range, charging pauses.
PART
MAX1874ETE
TEMP RANGE
-40 ° C to +85 ° C
PIN-
PACKAGE
16 Thin QFN
5mm x 5mm
PKG
CODE
T1655-2
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
DC INPUT
Typical Operating Circuit
DC
to protect the MAX1874 from overvoltage.
The MAX1874 contains no logic for communication with
MAX1874
PON
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
UOK
BATT
Li+
CELL
Applications
USB INPUT
USB
CHG
PDAs
Wireless Appliances
Cell Phones
Digital Cameras
USEL
500mA
100mA
Pin Configuration
TO REF
DCI
REGULATOR
EN
REF
TOP VIEW
16
15
14
13
THRM
DCLV
DC
1
2
12
11
USB
BYP
CHG
USEL
3
4
MAX1874
10
9
PGND
REF
BYP
PGND
GND
NTC
THERMISTOR
5
6
7
8
THIN QFN
5mm x 5mm
Functional Diagram appears at the end of the data sheet.
________________________________________________________________ Maxim Integrated Products
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.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1874EVKIT | 功能描述:电池管理 Evaluation Kit for the MAX1874 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX1875AEEG | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1875AEEG+ | 功能描述:电压模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1875AEEG+T | 功能描述:电压模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1875AEEG-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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