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参数资料
| 型号： | DS2731E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC MANAGEMENT BACKUP 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 备份管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 10.8 V ~ 13.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
Cache-Memory Battery-Backup Management IC
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NAME
MARGIN
STMR
CTG
AUX
CBIAS
VREG
CIN
LX
SGND
AGND
REF
LO_BATT
DIV
ENS
ENC
DONE
FAULT
CHARGE
CGND2
CGND1
CHG2
CHG1
VIN
CGATE
FUNCTION
Voltage-Margining Input. Selects regulation voltage of charging circuit. Connect to the STMR pin through
a resistor-divider.
Voltage Safety-Timer Input. Sets timeout period for a charge cycle based on external resistance to AGND.
Connect To Ground. Must be connected to AGND externally.
Auxiliary. External supply input to switching supply. Connect to system 3.3V supply.
Internal Regulator Output. Internal supply for the charging circuit generated from the V IN input. Bypass
with a capacitor to AGND.
Cache Voltage-Sense Input. Feedback for regulation of the switching circuit voltage. Connect to the
positive side of the switching output load.
Holdup/Bypass Capacitor. Internal supply for the switching regulator. Bypass with a 4.7μF capacitor to
AGND.
Switching Node, Backup Supply. Output from the switching regulator. Connect to the switching
regulator ’s external coil.
Switcher Ground. Ground reference for the switching regulator. Connect to the negative side of the load.
Analog Ground. Ground reference for the charging circuit. Connect to the negative side of the battery.
Voltage Reference for Backup. 1.238V voltage reference used to set regulation voltage and low-battery-
detection threshold. Connect to AGND through a resistor network.
Low-Battery Detection. Selects the low-battery shutdown threshold of the switching regulator. Connect to
the REF pin through a resistor-divider.
Voltage Divider for Backup. Controls the voltage output level of the switching regulator. Connect to the
REF pin through a resistor-divider.
Enable Switcher. Active-low enable for the switching regulator.
Enable Charger. Active-high enable for the charging circuit.
Charge-Done Indicator. Open-drain active-low output indicating successful charge completion of the
external cell.
Charger-Fault Indicator. Open-drain active-low output indicating failure during charge of the external cell.
Charge Indicator. Open-drain active-low output indicating charge of the external cell in progress.
Charger Ground 2. Ground reference for battery-charging circuit. Connect to negative side of external cell.
Charger Ground 1. Ground reference for battery-charging circuit. Connect to negative side of external cell.
High-Current Charger Output 2. Output from the charging circuit. Connect to charging circuit ’s external coil.
High-Current Charger Output 1. Output from the charging circuit. Connect to charging circuit ’s external coil.
Charge-Supply Input. Connect to 10.8V to 13.2V system supply.
Floating Gate Drive Bypass. Internal supply for the charger gate control. Bypass with a 2.2μF capacitor to VIN.
25
SNS
Current-Sense Input. Feedback for regulator of charger current. Connect a 0.050
between SNS and BATT+.
sense resistor
26
27
BATT+
RSET
Battery Terminal Voltage. Feedback for regulation of charger voltage and supply to switching regulator
during power loss.
Charge-Setting Resistor Intput. Selects CC charge rate for external lithium cell. Connect to AGND
through an external resistor.
28
THM
Thermistor Input. Connect to 10k
NTC thermistor with good thermal contact to the external lithium cell.
—
EP
Exposed Paddle. It is recommended the exposed pad be connected to system ground.
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7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2731E+ | 功能描述:电池管理 Cache-Memory Battery-Backup 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 |
| DS2731E+T&R | 制造商:Maxim Integrated Products 功能描述:CACHEMEM BAT BCKUP MGMT TSSOP28 T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MANAGEMENT BACKUP 28-TSSOP |
| DS2731E+T&R | 功能描述:电池管理 Cache-Memory Battery-Backup 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 |
| DS2731E+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Cache-Memory Battery-Backup Management IC |
| DS2731EVKIT+ | 制造商:Maxim Integrated Products 功能描述:12V A DC/DC CONVERTER - Boxed Product (Development Kits) |
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