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12V constant voltage charger of CW117/CW217/CW317 circuit

Published:2011/6/16 0:45:00 Author:chopper | Keyword: 12V, constant voltage, charger

12V constant voltage charger of CW117/CW217/CW317 circuit
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TA7215P dual track audio power amplifition integrated circuit

Published:2011/6/16 21:53:00 Author:chopper | Keyword: dual track, audio power, amplifition, integrated circuit

TA7215P dual track audio power amplifition integrated circuit

TA7215P is a dual track audio power amplifition integrated circuit,and it is applied to home-use audios and other tape recording players.1.inner circuit and typical application circuitThe inner circuit and typical application circuit of TA7215P integratedcircuit are shown as picture 1.This IC adopts dual inline 20 pinned package.Its function and data of pins of the integrated circuit are shown as chart 1. 2.the main electrical parameter of TA7215PThe scope of working power supply of TA7215P integrated circuit is 4.5-16V.When the load resistance RL=4Ω,THD=10%,f=1KHz,the output power of dual trackis 2.2W if Vcc=9V. (View)

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TA212lF servo driving integrated circuit

Published:2011/6/16 22:06:00 Author:chopper | Keyword: servo, driving, integrated circuit

TA212lF servo driving integrated circuit

TA2121F is a monolighic servo driving integrated circuit produced by Company TOSHIBA,and it is applied to TOSHIBA DVD players widely.1. The inner circuitTA2121F integrated circuit includes 4 channels BTL driving circuit which can receive DWM control signal output by digital servo IC.And the signal will be amplified by inner wave filtering and drive to drive the corresponding executive components.Its inner circuit of integrated package are shown as picture 1. 2.function of pins TA2121F integrated circuit adopts dual inline 36 pinned package.This chip is of cooling fin.Its function pins of the integrated circuit are shown as chart 1. (View)

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TA1343N surround processing integrated circuit

Published:2011/6/16 1:17:00 Author:chopper | Keyword: surround processing, integrated circuit

TA1343N surround processing integrated circuit
TA1343N is a surround processing integrated circuit produced by Company TOSHIBA,and it is applied to homemade and import large-screen color TV,such as Haier large-screen color TV and so on.TA1343N integrated circuit adopts dual inline 24 pinned package,and it is applied to Body strong 34F9B-TD large-screen color TV of Haier.Its function and data of integrated circuitare shown as chart 1. (View)

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TAl218N video,audio converting switch integrated circuit

Published:2011/6/16 22:45:00 Author:chopper | Keyword: video,audio, converting, switch integrated circuit

TAl218N video,audio converting switch integrated circuit

TAl218N is a video/audio converting switch circuit,and it is applied to homemade and import large-screen colour TVs widely.1.function characteristicsTAl218N integrated circuit includes I2C bus interface circuit,main/sprite video signal switching circuit,TV/AV audio switching circuit,Y/C separation signal switching circuit,TV video/audio switching circuit,sub-audio,flare,luminance signal switching circuit,L/H,U/V frequency band switching circuit,and other miscellaneous function circuits. (View)

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STV9306 field scanning output integrated circuit

Published:2011/6/14 8:50:00 Author:chopper | Keyword: field scanning, output, integrated

STV9306 field scanning output integrated circuit
STV9306 integrated circuit is a field scanning output integrated circuit and it is applied to Changhong large-screen color TV widely.1.function characteristicsSTV9306 integrated circuit includes I2C bus interface circuit,field sawtooth wave shaping circuit,field output amplifition circuit,field blanking signal shaping circuit,horizontal pincushion processing circuit and so on.2.function and data of pinsThe function and data of pins of STV3906 integrated circuit are shown as chart 1. (View)

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STVO117A digital video coding integrated circuit

Published:2011/6/14 9:16:00 Author:chopper | Keyword: digital video, coding, integrated circuit

STVO117A digital video coding integrated circuit
STVO117A is a digital video coding integrated circuit produced by French Company SGS-THOMSON and it is applied to various homemade and import DVD players.1.function characteristicsSTVO117A integrated circuit adopts I2C bus-mastering,and it can code input 8bit or 16bit video data stream into analog composite video signal or S video Y/C signal.It includes multipath output selector,matrixing circuit,modulator,caption generator,color sub-carrier combiner circuit and clock sync generator,three 9bit DAC circuit and IC2 bus interface circuit.2.function and data of pinsSTV0117A integrated circuit adopts single inline package.The function and data of pins of integrated circuit are shown as chart 1. (View)

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Three-phase power supply phase-lack protection circuit

Published:2011/6/24 21:34:00 Author:TaoXi | Keyword: Three-phase, power supply, phase-lack, protection circuit

The three-phase power supply phase-lack protection circuit is as shown in the figure. If any phase of the A, B, C is lacking, the optical coupler output level is lower than the reference voltage of the comparator's reverse phase input port, the comparator outputs the low level to blockade the PWM drive signal and turn off the power. If you change the comparator's input polarity, it can be used as the high level PWM blockading signal. This kind of phase-lack protection circuit uses the opto-isolated strong electric, it is safe and reliable, the RP1 and RP2 can be used to adjust the phase-lack protection movement threshold. (View)

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STRZ4302 switch power supply thick film integrated circuit

Published:2011/6/14 9:28:00 Author:chopper | Keyword: switch power supply, thick film, integrated circuit

STRZ4302 switch power supply thick film integrated circuit
STRZ4302 is a switch power supply thick film integrated circuit produced by Company Samco,and it is applied to Changhong NEC cassette mechanism,such as G2967,PF29488,G2898 large-screen colour TV.1.function characteristicsSTRZ4302 integrated circuit includes oscillation circuit,soft start circuit,timing control circuit,pulse driving circuit,over-current protection circuit,driving circuit,and other miscellaneous function circuit.2.function and data of pinsSTRZ4302 adopts 15 pins package,and its function and data of pins of the integrated circuit are shown as the chart 1. (View)

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Over-voltage protection circuit with the automatic reset function

Published:2011/6/24 21:51:00 Author:TaoXi | Keyword: Over-voltage, protection circuit, automatic, reset function

Over-voltage protection circuit with the automatic reset function
This circuit is composed of the power supply circuit, the trigger starting circuit and the control circuit, it controls the load RL to turn on and off the power through the two-way thyristor ZN*6. Once the voltage of the AC power supply is too high, the A point voltage of the current stabilization component 1N5314 will increase to conduct the unidirectional thyristor 2N5060 and cut off the transistor 2N6239, so the main two-way thyristor cuts off to make the load away from the overvoltage damage. (View)

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STR-Z4267 switch power supply thick film integrated circuit

Published:2011/6/15 7:55:00 Author:chopper | Keyword: switch power supply, thick film, integrated circuit

STR-Z4267 switch power supply thick film integrated circuit
STRZ4267 is a switch power supply thick film integrated circuit produced by J (View)

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STR-Z3302 power supply thick film integrated circuit

Published:2011/6/15 7:54:00 Author:chopper | Keyword: power supply, thick film, integrated circuit

STR-Z3302 power supply thick film integrated circuit

STRZ3302 is a voltage change power supply thick film integrated circuit of se (View)

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demodulator circuit

Published:2011/6/14 9:30:00 Author:chopper | Keyword: demodulator

demodulator circuit
I.The operating principle of demodulatorDemodulator is a important part of modulation DC amplifier circuit.It can restore the AC voltage which has been amplified to the DC voltage,and its size and polarity are according to the width and phase position of the AC voltage.The following picture is the principle of the demodulator.RL is a load,C is a filter capacitor to smooth the output DC voltage.Demodulation switch K　is of the same frequency with input AC singal,Vi. (View)

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Filter circuit can be used in the IF amplifier

Published:2011/6/23 21:41:00 Author:TaoXi | Keyword: Filter circuit, IF amplifier

Filter circuit can be used in the IF amplifier
The function of the IF amplifier is to supply the gain and the selectivity for the receiver, the selectivity part is realized by different filters. The filters that can be used in the IF amplifier are as shown in the figure. The typical application circuit is as shown in figure (a), the transformer of the figure has the tapping, but the non-tapping transformer also can be used. The tapping can supply the low impedance connection and keep the advantage of the high-impedance tuning circuit. You should notice that the capacitance is usually in the transformer isolation cover. Most of the specialized superheterodyne radio receiver's gain and selectivity are supplied by the intermediate frequency (IF) amplifier, so it is a high-gain narrow-bandwidth amplifier. Figure: All kinds of intermediate frequency filter circuits (View)