Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
ECEN-E5: ADVANCED POWER SUPPLY SYSTEMS
LEARNING TASK 2
LEADER:
DUMANGON, HYACINTH V. (4-3)
MEMBERS:
BALLINAN, JANE NICOLE (4-1)
PASTOR, HILARIE MAE (4-1)
OLAYON, CRISJOHN (4-3)
CONVERTER STAGE – PART 1
DESIGN THE LINEAR CONVERTER STAGE OF A POWER SUPPLY WITH SPECIFICATION SHOWN
ON THE TABLE BELOW:
PARAMETER VALUE UNIT
INPUT VOLTAGE (RMS) 120 VRMS
INPUT FREQUENCY 50 Hz
OUTPUT VOLTAGE (AVE) 5 VAVE
OUTPUT VOLTAGE RIPPLE (PK-PK) 2 VPP
OUPUT LOAD (MAX) 1 A
STEP 1: PASS TRANSISTORS – THE CONTROLLING INSTRUMENTS
PARAMETER EQUATION WHERE VALUE
Q1 EMITTER
(I E (Q 1) ) – Q1 Emitter Current
CURRENT
I E (Q 1)=I L 1A
(I E (Q 1) ) I L – Load Current
Q1 BASE CURRENT
Refer to Simulation (I B ( Q 1)) – Q1 Base Current 20.414 mA
(I B ( Q 1))
Q1 CURRENT I E (Q 1) (I B ( Q 1)) – Q1 Base Current 47.99
GAIN I B (Q 1)=
βQ 1+1
(β Q 1 ) – Q1 Current Gain
Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
I E (Q 1)
(β Q 1 ) β Q 1= −1
I B (Q 1 )
Q2 BASE
CURRENT
Refer to Simulation (I B ( Q 2) ) – Q2 Base Current 0.292 mA
(I B ( Q 2) )
I E (Q 1)
Q2 CURRENT I B (Q 2)=
βQ 2+1 (I B ( Q 2) ) – Q2 Base Current
GAIN
68.91
(β Q 2 ) I E (Q 1) ( β Q 2 ) – Q2 Current Gain
β Q 2= −1
I B (Q 2 )
STEP 2: OPERATIONAL AMPLIFIER – THE CONTROLLER
PARAMETER EQUATION WHERE VALUE
( AV ( X 1 )) – Q1 Emitter
Current
X1 VOLTAGE
GAIN V omax( X 1) V omax ( X 1) – X1 Maximum
AV ( X 1) = 1.51
V imax(x 1) Output Voltage
( AV ( X 1 ) )
V imax (X 1) – X1 Maximum
Voltage
X1 SOURCE
CURRENT
I S (X 1)=I B (Q 2) (I S ( X 1) ) – Source Current 0.29 mA
(I S ( X 1) )
STEP 3: FEEDBACK RESISTORS – THE MEASURING INSTRUMENTS
PARAMETER EQUATION WHERE VALUE
FEEDBACK R3 1.683 kΩ
AV ( X 1) =1+
RESISTORS R4 R3, R4 – Feedback Resistors 3.3 kΩ
(R3, R4) R3=R 4 ( A¿ ¿V ( X 1)−1)¿
Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
RESULT
PARAMETER EQUATION WHERE VALUE
NO LOAD ¿ ¿ Refer to Simulation 5.03 V
AND FULL LOAD ¿ ¿ ¿ ¿ – average output voltage 5.5 V
OUTPUT at no load
VOLTAGES
¿ ¿ – average output voltage
at full load
LOAD REGULATION % 𝐿R = ¿
(% LR)
% LR - % Load Regulation 9.3 %
INPUT POWER
Refer to Simulation Pi – Input Power 8.5 W
(P¿¿ i)¿
η - Efficiency
Po
EFFICIENCY (η) η= x 100 % Po – Output Power 58.82 %
Pi
Pi – Input Power
Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
Q1 and Q2
FULL LOAD
Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
NO LOAD
POWER
Republic of Philippines
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
COLLEGE OF ENGINEERING
Electronics Engineering (ECE) Department
PARAMETER EQUATION WHERE VALUE
𝑁𝑃 - No. of turns of transformer’s
TURNS RATIO 𝑁𝑃 𝑉𝑃 primary winding.
= 𝑁𝑆 - No. of turns of transformer’s
secondary winding.
𝑁𝑆 𝑉𝑆
(𝑅𝑀𝑆) -
RMS voltage on transformer’s 21.606:1
primary winding.
22:1
(𝑅𝑀𝑆) -
RMS voltage on transformer’s
secondary winding.
𝐍𝐏
- Turns ratio
