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MAX1772EEI 参数 Datasheet PDF下载

MAX1772EEI图片预览
型号: MAX1772EEI
PDF下载: 下载PDF文件 查看货源
内容描述: 低成本,多种化学电池 - 充电积木 [Low-Cost, Multichemistry Battery- Charger Building Block]
分类和应用: 电池光电二极管信息通信管理
文件页数/大小: 20 页 / 340 K
品牌: MAXIM [ MAXIM INTEGRATED PRODUCTS ]
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Low-Cost, Multichemistry Battery-  
Charger Building Block  
Pin Description  
PIN  
NAME  
FUNCTION  
1
2
DCIN  
LDO  
CLS  
REF  
Charging Voltage Input  
Device Power Supply. Output of the 5.4V linear regulator supplied from DCIN. Bypass with a 1µF capacitor.  
Source Current-Limit Input. Voltage input for setting the current limit of the input source.  
4.096V Voltage Reference. Bypass with 1µF to GND.  
3
4
5
CCS  
CCI  
Input Current Regulation Loop Compensation Point. Use 0.01µF to GND.  
Output Current Regulation Loop Compensation Point. Connect 0.01µF to GND.  
Voltage Regulation Loop Compensation Point. Connect 1kin series with 0.1µF to GND.  
Analog Ground  
6
7
CCV  
GND  
8, 9  
ICHG is a scaled-down replica of the battery output current being sensed. It is used to monitor the  
charging current and indicates when the chip changes from voltage mode to current mode. The  
transconductance of (CSIP - CSIN) to ICHG is 1µS. Connect ICHG pin to GND if it is unused.  
10  
ICHG  
11  
12  
ACIN  
AC Detect Input. Detects when the AC adapter voltage is available for charging.  
AC Detect Output. Open-drain output is high when ACIN is less than REF/2.  
ACOK  
Reference Input. Allows the ICTL and VCTL pins to have ratiometric ranges for increased DAC  
accuracy.  
13  
14  
REFIN  
ICTL  
Input for Setting Maximum Output Current. Range is REFIN/32 to REFIN. The device shuts down if  
this pin is forced below REFIN/55 (typ).  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
VCTL  
CELLS  
BATT  
CSIN  
CSIP  
PGND  
DLO  
Input for Setting Maximum Output Voltage. Range is 0 to REFIN.  
Trilevel Input for Setting Number of Cells. GND = 2 cells, LDO/2 = 3 cells, LDO = 4 cells.  
Battery Voltage Input  
Output Current-Sense Negative Input  
Output Current-Sense Positive Input. Connect a current-sense resistor from CSIP to CSIN.  
Power Ground  
Low-Side Power MOSFET Driver Output. Connect to low-side NMOS gate.  
Low-Side Driver Supply  
DLOV  
LX  
Power Connection for the High-Side Power MOSFET Driver. Connect to source of high-side NMOS.  
High-Side Power MOSFET Driver Output. Connect to high-side NMOS gate.  
DHI  
Power Connection for the High-Side Power MOSFET Driver. Connect a 0.1µF capacitor from LX to  
BST.  
25  
26  
27  
BST  
CSSN  
CSSP  
Input Current-Sense for Charger (negative input)  
Input Current-Sense for Charger (positive input). Connect a current-sense resistor from CSSP to  
CSSN.  
IINP is a scaled-down replica of the input current being sensed. It is used to monitor the total system  
current. The transconductance of (CSSP - CSSN) to IINP is 1mS. Connect IINP pin to GND if it is unused.  
28  
IINP  
10 ______________________________________________________________________________________  
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