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參數(shù)資料
| 型號(hào)： | DS1260-50 |
| 英文描述： | Smart Battery |
| 中文描述： | 智能電池 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 273K |
| 代理商： | DS1260-50 |
DS1260
2 of 8
OPERATION
During normal operation V
CCI
(pins 15 and 16) is the primary energy source and power is supplied to
V
CCO
(pins 12 and 13) through an internal switch at a voltage level of V
CCI
-0.2 volts @ 250 mA. During
this time the power-fail signal (
PF
) is held high, indicating valid primary voltage (see Figure 1).
However, if the V
CCI
falls below the level of 4.25 volts, the power-fail signal is driven low. As V
CCI
falls
below the level of the lithium supply (V
BAT
= 3 volts), power is switched and the lithium energy source
supplies power to the uninterruptible output (V
CCO
) at V
BAT
-0.2 volts @ 5 mA.
On power-up, as the V
CCI
supply rises above 3 volts, the primary energy source, V
CCI
, becomes the
supply. As the V
CCI
input rises above 4.25 volts, the power-fail signal is driven back to the high level.
During normal operation, BAT (Pin 5) stays at the battery level of 3 volts, regardless of the level of V
CCI
.
BATTERY FAIL
When power is being supplied from the primary energy source,
BF
(Pin 3) is held at a high level (V
OH
),
provided that the lithium energy source is greater than 2 volts. If the lithium energy source should
decrease to below 2 volts, the
BF
signal is driven low (V
OL
), indicating an exhausted lithium battery. The
BF
signal is always low when power is being supplied by the lithium energy source.
RESET
The reset input can be used to prevent the lithium energy source from supplying power to V
CCO
and BAT
even if V
CCI
falls below 3 volts. This feature is activated by applying a pulsed input on RST to a high
level (V
IH
) for 50ns minimum while primary power is valid (see Figure 2). When primary power is
removed after pulsing RST, the V
CCO
output and BAT will go to high impedance. The next time primary
power is applied such that V
CCI
is greater than V
BAT
, normal operation resumes and V
CCO
will be supplied
by the lithium energy source when V
CCI
again falls below 3 volts. BAT will also return to the level V
BAT
.
Figure 3 shows how the SmartBattery is used in a system application.
BLOCK DIAGRAM
Figure 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1262 | Nonvolatile Controller |
| DS1262S | Nonvolatile Controller |
| DS1264 | Nonvolatile Controller |
| DS1265 | Nonvolatile Controller |
| DS1265AB-100 | NVRAM (Battery Based) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1262 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Nonvolatile Controller |
| DS1262S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Nonvolatile Controller |
| DS1264 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Nonvolatile Controller |
| DS1265 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Nonvolatile Controller |
| DS1265AB | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:8M Nonvolatile SRAM |
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