Download presentation

1
**Regulated Linear Power Supply**

2
**Dual-Output Adjustable Linear Regulated Power Supply**

3
Block Diagram

4
Simple Description Transformer: “Downconvert” the AC line voltage to a smaller peak voltage Vm, usually about 2-3 Volts larger than the ultimately desired DC output. Diode Rectifier Circuit: produce a waveform with large DC component. Filter: smooth out the rectified sinusoid. Regulator: eliminate residual ripple

5
**c03f34 Half-Wave Rectifier Tin**

Cause of ripple: the capacitor is discharged for almost an entire period.

6
c03f36 inversion Ripple Reduction: Do not allow the capacitor to discharge so frequently

7
**An Inverting Half-Wave Rectifier**

If Vin >0, D1 and D2 are off. If Vin <0, D1 and D2 are on and Vout>0.

8
**An Non-Inverting Half-Wave Rectifier**

If Vin >0, D1 and D2 are on, Vout>0. If Vin <0, D1 and D2 are off.

9
Full-Wave Rectifier Inverting Non-Inverting

10
**Full-Wave Rectifier Alternative Drawing**

Full-Wave A.K.A. Bridge Rectifier Non-Inverting Inverting

11
**Using Constant Voltage Diode Model**

Vout=-Vin-2VD, on Vout=Vin-2VD, on

12
Input versus Output |Vin|<2VD,on

13
**Addition of the Smoothing Capacitor**

14
**Modification of Ripple Estimation Formula**

Turn-on voltage 1/2 to account for inversion of negative peaks.

15
**Maximum Reverse Voltage**

VB=VD,on Vp is the amplitude of Vin VA=VP VAB=VP-VD,on Maximum reverse voltage is approximately Vp

16
**Compare Maximum Reverse Bias Voltage to Half-Wave Rectifier**

A reverse diode voltage must sustain larger reverse bias voltage

17
**Currents as a function of time**

18
**Application of Bridge Rectifier**

19
Summary

20
**A Voltage Regulator Circuit**

21
Schematic

22
**Full-Wave Rectifier Alternative Drawing**

Full-Wave A.K.A. Bridge Rectifier Non-Inverting Inverting

23
Rectified Waveform

24
Smoothing Capacitor

25
LM317/LM337

27
**Without Load Resistance (CL=100 uF)**

9.36 V and V

28
**Load Assumption Assume that the load draws 0.2 A of current**

Load resistance: 9.36V/0.2A=36.5 Ohms

29
Each capacitor is 100 uF. Resistor is 37.5 Ohms

30
**Use Reload update curves**

31
**Increase capacitor from 100**

uF to 470 uF. Reduced ripples

32
Extra Slides

33
**I-V Characteristic of LED**

Similar presentations

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google