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參數(shù)資料
| 型號(hào)： | AMIS-70020 |
| 元件分類： | 通用總線功能 |
| 英文描述： | Power Failure Elapsed Time Counter |
| 中文描述： | 電源故障歷時(shí)計(jì)數(shù)器 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大?。?/td> | 342K |
| 代理商： | AMIS-70020 |
The AMIS-70020 is a timer IC that measures the duration of
power failures of up to five hours. The AMIS-70020 starts
and stops counting automatically as it is triggered by the
voltage of the input signal VCC. When VCC gets lower than
the reference signal VDD - VTH, a power cut-off is flagged
and the AMIS-70020 starts counting. During the counting
phase the AMIS-70020 is powered by an external capacitor
or by a primary battery and consequently operates
independently of an external power supply. Due to the low
power design of the AMIS-70020, the device can count the
full scale autonomously using the energy stored in a 10mF
capacitor.
As soon as VCC comes up again counting stops. The value
of the counter is shifted to the digital Q_OUT output pin
and is communicated to a microprocessor. After shifting the
full counted value, the internal RC-oscillator signal is put on
the Q_OUT output pin. Using this data the microcontroller
can calculate the duration of the power failure.
The internal power management circuit manages the
recharge of the external buffer capacitor.
The few external components required to build the AMIS-
70020 into its application result in a cost effective solution
and in a footprint of less than 2cm
2
. The combination of an
internal oscillator and a microcontroller software algorithm
eliminate the requirement for a space and cost consuming
external crystal.
Typical applications are those sensitive to power failures
that do not have a built-in UPS function. Examples are:
Power inverters/Motordrivers/Soft starters
Accurate I
2
t protection possible even after power loss
Thermal protection devices for electrical motors
without integrated thermistor
Motor controllers for electrical motors without
integrated thermistor
Process control
Chemical processes
Industrial mixers
Mixing reactors
1.0 General Description
Measures the time elapsed during a power failure
Measures up to five hours
1 second resolution (RC oscillator/1024)
Autonomous operation during power failure
Auto switching to backup power
Auto counter-start/stop function
Maintenance free buffer capacitor
- 6 hours back-up with 10mF
- Capacitor recharge management built in (no external
diode needed)
Li-button cell
- CR1220 (35mAh) supports up to 10 years in a typical
application
Low current consumption <1μA
Built-in 1kHz oscillator
No external oscillator required
Frequency of oscillator can be read by an external
microcontroller
Accurate time measurement possible using software
calibration algorithm
2-wire interface with standard I/O pins of a
microcontroller
Operating temperature -10~85C
150 mils SO8 package
Few external components
Easy design-in due to a user friendly application board
For sample requests contact your local sales representative
at
www.amis.com/sales.
2.0 Key Features
AMI Semiconductor
www.amis.com
1
3.0 Ordering Information
Ordering Code
Package
Temp. Range
AMIS-70020
SO8
-10°C…-85°C
Ordering Code
EVK-70020
Evaluation kit
AMIS-70020 Power Failure Elapsed Time Counter
Data Sheet
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AMIS-710200 | 200dpi CIS Module |
| AMIS-710201 | 200dpi CIS Module |
| AMIS-710205 | 200dpi CIS Modules |
| AMIS-710205-A4 | 200dpi CIS Modules |
| AMIS-710206-A4 | 200dpi CIS Modules |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AMIS-710200 | 制造商:AMI 制造商全稱:AMI 功能描述:200dpi CIS Module |
| AMIS-710201 | 制造商:AMI 制造商全稱:AMI 功能描述:200dpi CIS Module |
| AMIS-710205 | 制造商:AMI 制造商全稱:AMI 功能描述:200dpi CIS Modules |
| AMIS-710205-A4 | 制造商:AMI 制造商全稱:AMI 功能描述:200dpi CIS Modules |
| AMIS-710206-A4 | 制造商:AMI 制造商全稱:AMI 功能描述:200dpi CIS Modules |
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