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24V CRT high voltage power supply circuit diagram

Published:2011/4/14 2:42:00 Author:Ecco | Keyword: 24V, CRT, high voltage, power supply

24V CRT high voltage power supply circuit diagram
Some cameras use 11.4cm (4.5 inches) pure flat CRT as the display component, the anode voltage of high-voltage components is +20 kV, focus electrode voltage is +3.2 kV, accelerating voltage is +1000 V, the power supply of high voltage components is DC in 24V. It's as the chart shown: Basic principles: NE555 constitutes pulse generator, to adjust potentiometer VR2 can generate a pulse with the frequency in about 20kHz, potentiometer VR1 adjusts the pulse width. TR1 is driver stage, the pulse transformer T1 adopts reverse polarity excitation, that is TR1 being on while TR2 being off, TR2 being on while TR1 being off, D3, C9, VR3, R7 and D4, R6, TR3 form a high-voltage protection circuit. VR2 is used for adjusting the frequency, and VR2 is used for adjusting the size of high voltage. VR2 uses precision adjustable resistors. T2 can adopt colour TV line output transformer. The writer uses the Toyo SE-1438G Series of 35cm (14 inch) color TV line output transformer, with the anode voltage up to 20kV, and then choose the resistance of R8 to make acceleration voltage be +1000 V, the resistance of R9 make the focus electrode voltage be +3.2 kV. The whole part is packaged with aluminum box, aluminum jacket is connected to the earth to reduce the interference on the circuit. (View)

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Using large capacitor C to instead back up battery circuit

Published:2011/4/13 3:09:00 Author:Nicole | Keyword: large capacitor C, back up battery

Using large capacitor C to instead back up battery circuit
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PIC16C72 and X9241 interface circuit

Published:2011/4/13 3:47:00 Author:Nicole | Keyword: interface

PIC16C72 and X9241 interface circuit
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MAXl898 single node Li + battery linear charger

Published:2011/4/13 3:57:00 Author:Nicole | Keyword: single node Li, battery linear charger

MAXl898 single node Li + battery linear charger
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MAX846A most typical application circuit charging circuit

Published:2011/4/13 4:01:00 Author:Nicole | Keyword: charging

MAX846A most typical application circuit charging circuit
In figure, MAX846A is as a free limit voltage current source to charge to lithium ion battery. (View)

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DUM23-48／300Ⅱ DC distribution unit electrical schematic diagram

Published:2011/3/23 1:38:00 Author:muriel | Keyword: DUM23-48／300Ⅱ, DC distribution unit , electrical schematic diagram

DUM23-48／300Ⅱ DC distribution unit electrical schematic diagram
As shown in the figure:B2(13) and B3(14) are hall current sensors; FU9(9) and FU10(10) are fuses; AP646 is fusing alarm signal board;X24、X26 and X29 are terminals of the user interface board; XT is socket. (View)

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BQ2057 package

Published:2011/4/2 2:12:00 Author:may | Keyword: package

BQ2057 package
BQ2057 is advanced lithium ion battery charging IC. It is produced by America TI company. It can satisfy the charging need of simple link (4.1V or 4.2V) or two link (8.2V or 8.4V) lithium ion battery and polymer lithium ion battery. Meanwhile it offerd package choose of MSOP, TSSOP and SOIC, etc according to different application. The charger peripheral circuit designed by BQ2057 is simple. It is well suited to compact design need of portable type electronic product. (View)

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1000V High-pressure output DC regulated voltage power supply circuit

Published:2011/3/22 22:52:00 Author:muriel | Keyword: 1000V, High-pressure output, DC , regulated voltage power supply circuit

1000V High-pressure output DC regulated voltage power supply circuit
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1000W Automatic voltage regulating AC regulated voltage power supply

Published:2011/3/22 22:51:00 Author:muriel | Keyword: 1000W , Automatic, voltage regulating , AC , regulated voltage power supply

1000W Automatic voltage regulating AC regulated voltage power supply
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High input voltage integrated regulated voltage power supply circuit with CW200 No.1

Published:2011/3/30 2:19:00 Author:muriel | Keyword: High input voltage, integrated , regulated voltage power supply

High input voltage integrated regulated voltage power supply circuit with CW200 No.1
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High input voltage integrated regulated voltage power supply circuit with CW200 No.2

Published:2011/3/30 2:20:00 Author:muriel | Keyword: High input voltage, integrated , regulated voltage power supply

High input voltage integrated regulated voltage power supply circuit with CW200 No.2
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50V suspension regulated voltage power supply with CA723C

Published:2011/3/30 2:20:00 Author:muriel | Keyword: 50V , suspension, regulated voltage power supply

50V suspension regulated voltage power supply with CA723C
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CATV amplifier power circuit

Published:2011/3/21 22:43:00 Author:muriel | Keyword: CATV amplifier, power circuit, UC2842AN

CATV amplifier power circuit
The IC is pulse width modulation regulated IC 2 pin is output voltage adjustable regulator feet3 pin is over-current protection feet4 pin is output voltage control feet6 pin is driver output feet7 pin is power and over-voltage protection feet8 pin is regulated control input feet (View)