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MAX745EAP-T

更新时间： 2024-11-24 20:05:15
品牌 Logo 应用领域
美信 - MAXIM 光电二极管
页数 文件大小 规格书
8页 125K
描述
Power Supply Management Circuit, 1 Channel, PDSO20, SSOP-20

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MAX745EAP-T 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SSOP
包装说明：SSOP-20针数：20
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.3
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PDSO-G20
JESD-609代码：e0长度：7.2 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：20
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP20,.3封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：245
认证状态：Not Qualified座面最大高度：1.99 mm
子类别：Power Management Circuits最大供电电压 (Vsup)：24 V
最小供电电压 (Vsup)：6 V标称供电电压 (Vsup)：18 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：5.29 mm
Base Number Matches：1

MAX745EAP-T 数据手册

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19-1182; Rev 3; 10/01  
Switch-Mode Lithium-Ion  
Battery-Charger  
General Description  
____________________________Features  
The MAX745 provides all functions necessary for  
charging lithium-ion (Li+) battery packs. It provides a  
regulated charging current of up to 4A without getting  
hot, and a regulated voltage with only ±±.75ꢀ total  
error at the battery terminals. It uses low-cost, 1ꢀ resis-  
tors to set the output voltage, and a low-cost N-channel  
MOSFET as the power switch.  
ꢀ Charges 1 to 4 Li+ Battery Cells  
ꢀ
0.75% Voltage-Regulation Accuracy  
Using 1% Resistors  
ꢀ Provides up to 4A without Excessive Heating  
ꢀ 90% Efficient  
ꢀ Uses Low-Cost Set Resistors and  
N-Channel Switch  
ꢀ Up to 24V Input  
ꢀ Up to 18V Maximum Battery Voltage  
ꢀ 300kHz Pulse-Width Modulated (PWM) Operation  
Low-Noise, Small Components  
ꢀ Stand-Alone Operation—No Microcontroller  
The MAX745 regulates the voltage set point and charg-  
ing current using two loops that work together to transi-  
tion smoothly between voltage and current regulation.  
The per-cell battery voltage regulation limit is set  
between 4V and 4.4V using standard 1ꢀ resistors, and  
then the number of cells is set from 1 to 4 by pin-strap-  
ping. Total output voltage error is less than ±±.75ꢀ.  
Needed  
For a similar device with an SMBus™ microcontroller  
interface and the ability to charge NiCd and NiMH cells,  
refer to the MAX1647 and MAX1648. For a low-cost Li+  
charger using a linear-regulator control scheme, refer  
to the MAX846A.  
Ordering Information  
PART  
MAX745C/D  
MAX745EAP  
TEMP RANGE  
±°C to +7±°C  
4±°C to +85°C  
PIN-PACKAGE  
Dice*  
________________________Applications  
2± SSOP  
Li+ Battery Packs  
Desktop Cradle Chargers  
Cellular Phones  
*Dice are tested at T = +25°C.  
A
Pin Configuration appears at end of data sheet.  
Notebook Computers  
Hand-Held Instruments  
Typical Operating Circuit  
V
IN  
(UP TO 24V)  
DCIN  
VL  
BST  
DHI  
CELL  
COUNT  
SELECT  
CELL0  
CELL1  
N
N
ON  
LX  
OFF  
THM/SHDN  
REF  
MAX745  
DLO  
I
CHARGE  
SETI  
CS  
VADJ  
R
SENSE  
SET PER  
CELL VOLTAGE  
WITH 1% RESISTORS  
STATUS  
BATT  
CCV  
CCI GND IBAT PGND  
VOUT  
1–4 Li+ CELLS  
(UP TO 18V)  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ 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.  
12345678

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