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参数资料
| 型号： | DS2731E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/20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
12V
DETECT POWER FAILURE
10V
2.93V
3.3V
ENS
DETECT 3.3V FAILURE
T1
T2
T3 T4
TIME
Figure 9. Expected Scenario for Multiplex Switchover from Aux to Battery
Actions Occurring During Time Intervals
From T1 to T2: At T1, the power-failure signal occurs
and the system must put the cache
memory into its self-refresh mode.
Then it must shut off the system cache
supply. Between the time the system
power supply is shut off and the ENS
pin is driven low, the cache memory is
powered from its local bypass capaci-
tance.
From T2 to T3: When the ENS pin goes low, the
DS2731 buck regulator turns on and
From T3 to T4: At time T3, the DS2731 detects that
the 3.3V aux supply is about to fail and
activates the multiplexer. However, to
prevent cross-connections between
the 3.3V aux and the battery, the multi-
plexer is designed as break-before-
make. The interval T3 –T4 is t BRK .
During this interval the DS2731 switch-
ing supply uses the holdup capacitor
on CIN as its power source. CIN must
be sized so that it has enough capaci-
ty to hold up the regulator for t BRK .
takes over regulation of the cache-
memory voltage. The power source for
the DS2731 ’s switcher during this
interval is the 3.3V aux voltage.
After T4:
At T4, the multiplexer connects CIN to
the battery’s positive terminal. The reg-
ulator operates from the battery.
18
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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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