Diode - Basic Applications
-
Upload
yong-heui-cho -
Category
Technology
-
view
2.627 -
download
1
Transcript of Diode - Basic Applications
![Page 1: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/1.jpg)
Diode – Basic Applications
Yong Heui Cho @ Mokwon University
Some of slides are referred to:[1] A. S. Sedra & K. C. Smith, Microelectronic Circuits.
![Page 2: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/2.jpg)
2
Electronic Circuits
4. Diode – Operational Princi-ple5. Diode – V/I
6. Diode – Basic Applica-tions7. Diode – Advanced Applica-tions
![Page 3: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/3.jpg)
3
Half-wave Rectifier• Rectifier converts an AC into a DC by allowing a
current to flow through it in one direction only.
vO = 0, vS < VD0
RR + rD
vS - VD0R
R + rD
vO = vS ≥ VD0
≈ vS – VD0 , for rD ≪ R
![Page 4: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/4.jpg)
4
Full-wave Rectifier
PIV = 2VS – VD0
![Page 5: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/5.jpg)
5
Bridge Rectifier
vD3(reverse) = vO + vD2(forward)
PIV = Vs -2VD + VD = Vs - VD
![Page 6: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/6.jpg)
6
Voltage Regulator• VR automatically maintains a constant
voltage level– Zener diode or IC
![Page 7: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/7.jpg)
7
Ideal Peak Detector
Ideal case
![Page 8: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/8.jpg)
8
Real Peak Detectort1 < t < t2
Vr = VP – vO(T-ΔT) =
iDmax = IL(1 + 2π√2Vp/Vr)iDav = IL(1 + π√2Vp/Vr)
![Page 9: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/9.jpg)
9
DC Power Supply
V1 / V2 = N1 / N2
transformer
![Page 10: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/10.jpg)
10
Simple Power Supply• No transformer• Bridge rectifier, Zener diode, voltage di-
vider with C, peak detector
![Page 11: Diode - Basic Applications](https://reader036.fdocuments.in/reader036/viewer/2022062400/587184f01a28ab2c198b4b23/html5/thumbnails/11.jpg)
11
IC-based Power Supply• Transformer, bridge rectifier, peak
detector, regulator IC