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STV-376-E01 bảng dữ liệu(PDF) 7 Page - STMicroelectronics

tên linh kiện STV-376-E01
Giải thích chi tiết về linh kiện  Ultra-low power laser motion sensor for laser mouse applications
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STV-376-E01 bảng dữ liệu(HTML) 7 Page - STMicroelectronics

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VT5376
Power supply options and power consumption
7/30
2
Power supply options and power consumption
The sensor includes a DCDC controller to supply the laser / LED. This allows the overall
sensor system to operate from a single AA or AAA battery supply voltage (from 1.6V down
to 1V), allowing for a simple and low power / low cost system design. Two power supply
schemes can be used.
2.1
Low cost application
The internal DCDC controller and voltage regulators are used so that the overall application
can be supplied from a single AA/AAA battery cell, without the need for an external step-up
convertor device. This approach is extremely economical.
Note:
1
DCDC efficiency from single battery cell to Vtop (typical 2.2V) is around 70%.
2
Maximum load on Vtop is 25mA
2.2
External supply application
In this instance, the internal DCDC controller and voltage regulators are turned off and
bypassed. The sensor then needs to be supplied with a single regulated 1.8V +/- 0.1V.
Table 2.
Typical power supply and power consumption
Run
IDLE1
IDLE2
SLEEP
4000 fps
2000 fps
1000 fps
Total @ ITop
(chip + Laser/LED)
5.8 mA
3.5 mA
2.4 mA
0.3 mA
0.15 mA
0.1 mA
Total chip @Vbat
0.04 mA
0.04 mA
0.04 mA
0.04 mA
0.04 mA
0.04 mA
Table 3.
Power supply and typical power consumption
Run
IDLE1
IDLE2
SLEEP
4000 fps
2000 fps
1000 fps
Total
@Vtop/Vbat/Dvdd/
Avdd (1.8V)
Chip + Laser/LED
5.8 mA
3.5 mA
2.4 mA
0.3 mA
0.15 mA
0.1 mA


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