Datasheet

8/10

BD47xx series

TSZ02201-0R7R0G300020-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

22.May.2013 Rev.006

www.rohm.com

TSZ22111

・

15

・

001

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Application Information

Explanation of Operation

BD47xx series has threshold voltages namely the detection voltage and release voltage. As the voltages applied to the

input reach their respective thresholds, the output switches from “High” to “Low” and from “Low” to “High”. The release

voltage has a hysteresis that is the value of the detection voltage +50mV (Typ.), preventing chattering in the output. When

the input is greater than the release voltage, the output is in a “High” state. When the input decreases from that state, the

output switches to “Low” upon reaching the detection voltage. When the input is less than the detection voltage, the output

is in a “Low” state. When the input increases from that state, the output switches to “High” upon reaching the release

voltage. Additionally, at least 0.85V input voltage is required for the circuit to function as expected. When the input falls

below the operating limit voltage, the output becomes unstable.

1

2

Low.

3

4

5

The potential difference between the detection voltage and the release voltage is known as the Hysteresis Width

width, malfunctions due to noise are prevented.

<Precautions>

Please be aware that when there is resistance on the power supply line, the detection voltage varies with voltage drops

caused by the IC current consumption.

Fig.11 Timing Waveform

Δ

0V

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②

③

④

⑤