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Sailor N420

This document provides a 3-sentence summary of a technical manual for a 24V/12V regulator: The manual describes the design and operation of a linear voltage regulator that converts 24V DC input to a 13.2V DC output, explaining that it uses transistors and resistors to regulate the output voltage based on feedback from an integrated voltage regulator chip. The document includes technical specifications, a circuit description detailing how different components work together to regulate the voltage and current levels, and a parts list for the regulator components.

Uploaded by

Juan Basilio Cob Sulub
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106 views1 page

Sailor N420

This document provides a 3-sentence summary of a technical manual for a 24V/12V regulator: The manual describes the design and operation of a linear voltage regulator that converts 24V DC input to a 13.2V DC output, explaining that it uses transistors and resistors to regulate the output voltage based on feedback from an integrated voltage regulator chip. The document includes technical specifications, a circuit description detailing how different components work together to regulate the voltage and current levels, and a parts list for the regulator components.

Uploaded by

Juan Basilio Cob Sulub
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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1 GENERAL DESCRIPTION 1.

RIPTION 1.2 PRINCIPLE OF OPERATION When the input voltage and the output current are cooling surface will increase and activate the thermal
The regulator is a general purpose 24V DC to 13.2V The regulator is a linear serial regulator where most high, T1 is nearly saturated. When the input voltage protection circuit inside IC1 and lower the output
DC regulator, e.g. to be used for supply of VHF of the loss is dissipated in resistors. It is provided is low and the output current is high, the resistors R1 voltage, even though a short-circuit of the output
radiotelephones. with a terminal for remote shut-down. If the on/off - R3 will result in saturation of both T1 and T2. The should be avoided.
The regulator is a serial regulator with excellent terminal is connected to the -terminal, the regulator combination of T1 in saturation and T2 delivering The diode D1 protects against reverse input volt-
noise performance. is on. If the on/off terminal is disconnected, the the remaining output current divides the total loss, age. A fuse will blow in case of reverse input.
regulator is off. so the main loss is in the resistors giving low loss in
the semi-conductors and a lower junction tempera-
ture, resulting in a higher reliability for the whole
1.1 TECHNICAL DATA regulator.
The regulator is controlled from the connected VHF 1.3 CIRCUIT DESCRIPTION T4 is used to switch the regulator ON and OFF. If the
unit by the on/off button. The output voltage is regulated by the integrated ON/OFF input is disconnected T4 is OFF and the
voltage regulator IC1. The output voltage is 12V DC base currents to T1 and T2 are zero and the current
plus the forward voltage over diodes D5 and D6: through IC1 will also be reduced to zero. The stand-
Input Voltage 21.6 to 31.2V DC approx. 13.2V DC in total if T4 is conducting. If the by current consumption is then less than 10 micro
output voltage drops the current through IC1 and R5 amp. If the ON/OFF input is connected to - input, T4
Output Voltage 13.2V DC
increases. An increase in voltage across R5 will goes into saturation and the regulator starts.
Output Current Max. 8A DC result in an increase in current in T1 and the resis- In case of a short-circuit over the output R5 and D3
Operation Temperature tors R10 - R23 resulting in an increase in the output limits the current through IC1 and T4 to approx. 250
15°C to +55°C
Range current. T1 delivers most of the output current and mA and R1 - R3 and D3 limits the current through T1
TECHNICAL MANUAL
Fuse 8 Amp. 5 x 20mm FC1 only a small driver current. and T2 to approx. 15 Amp. The temperature of the
FOR
If the input voltage is low and the output current is
24V/12V REGULATOR Current from on/off
Less than 15 mA DC high, the voltage across R10 -R23 results in T1
N420 Terminal
going into saturation. The voltage across R4 in-
creases and when the voltage across R4 and VBE Of 1.4 PARTS LIST
T1 is greater than approx. 1 Volt, T3 starts to
conduct base current to T1. This transistor then
shunts the remaining current to the output, bypass- REGULATOR ECI A/S 5-0-24613G 600416
ing R10 - R23.
POSITION DESCRIPTION MANUFACTOR TYPE PART NO.

C1 CAPACITOR ELECTROLYTIC 47uF -10/+50% 63V ERO EB 00 FL 247 J 14.552


COMPONENT LOCATION DIAGRAM C2 CAPACITOR MKT 0.22uF 10% 63V ERO MKT1818 11.090 DIMENSION AND DRILLING PLAN
C3 CAPACITOR MKT 0.22uF 10% 63V ERO MKT1818 11.090
C4 CAPACITOR ELECTROLYTIC 47uF -10/+50% 63V ERO EB 00 FL 247 J 14.552
C5 CAPACITOR MKT 100nF 10% 100VDC PHILIPS 2222 371 28104 11.180
D1 DIODE MOTOROLA MR750 25.219
D2 DIODE SCHOTTKY THOMSON-CSF BAT43 27.600
E-T2

E-T2

R10 R17 R10 R17


D3 DIODE ZENER PHILIPS BZX79C7V5 26.539
D5 DIODE 1N4148 HIGH SPEED PHILIPS 1N4148-143 25.131
R11 C-T1 R18 R11 C-T1 R18
D6 DIODE 1N4148 HIGH SPEED PHILIPS 1N4148-143 25.131

78mm
F1 FUSE 8AF 250V Ø5x20mm ELU 171 100 8AF 45.561
R12 R19 R12 R19
IC1 VOLTAGE REGULATOR +12V MOTOROLA MC7812CT 31.260
R1 RESISTOR POWER 1R0 OHM 10% 6.5W VITROHM 1R0 10% TYPE 296-0 05.725
E-T1
B-T1

R13
E-T1
B-T1

R20 R13 R20


R2 RESISTOR POWER 1R0 OHM 10% 6.5W VITROHM 1R0 10% TYPE 296-0 05.725
R3 RESISTOR POWER 1R0 OHM 10% 6.5W VITROHM 1R0 10% TYPE 296-0 05.725
R14 R21 R14 R21
R4 RESISTOR 47 OHM 5% 0.6W BEYSCHLAG MBB 0207-00-BX-47R 03.167
R5
R4

R5
R4

R5 RESISTOR PMF 27 OHM 5% 3W PHILIPS 2322 195 13279 04.660 7.5mm


90mm
7.5mm
105mm
R15 R22 R15 R22
R6 RESISTOR MF 1k0 OHM 5% 0.4W PHILIPS 2322 181 53102 01.200
R7 RESISTOR MF 1k0 OHM 5% 0.4W PHILIPS 2322 181 53102 01.200
R16 R23 R16 R23

7.5mm
R8 RESISTOR MF 10k OHM 5% 0.4W PHILIPS 2322 181 53103 01.225 4 pcs. ø3.5mm

IC1
R9 RESISTOR 2.2 KOHM 5% 0.6W DRALORIC SMA 0207 STK100-2K 03.208
IC1
C5 C5 R10 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
T3
E-T2

T3
E-T2
R6

R3 R7
R6

D2 R3 R7 D2 R11 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
D3
B-T2

D3 R12 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
B-T2

140mm

155mm
T4

T4

R2 R8
R9
R2 R8 R13 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
C-T2 C-T2 R9
R14 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730 UP
C3 C3
D5

R1
R15 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
D5

R1

Issue: D/0339
C2 C2
D6 D6 R16 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730

7.5mm
C1

R17 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
C4

This diagram is valid for PCB rev. 24613G


C1
D1

C4
D1

R18 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
F1 F1 R19 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730 25332A
R20 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
R21 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730

Doc. No.: M420GB


R22 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
R23 RESISTOR POWER 6R8 OHM 10% 6.5W VITROHM 6R8 10% TYPE 296-0 05.730
T1 TRANSISTOR DARLINGTON TEXAS MJ2501 29.235
T2 TRANSISTOR DARLINGTON TEXAS MJ2501 29.235
View from component side with upper side tracks. View from component side with lower side tracks. T3 TRANSISTOR AF BC547B NPN TO-92 PHILIPS BC547B 28.067 The regulator must only be mounted vertically.
PCB rev. 24613G T4 TRANSISTOR BD140-10 AEG BD140-10 29.066 Free distance must be kept to allow circulation.

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