CN201435214Y - Standby control circuit for DVD power boards - Google Patents
Standby control circuit for DVD power boards Download PDFInfo
- Publication number
- CN201435214Y CN201435214Y CN2009200554825U CN200920055482U CN201435214Y CN 201435214 Y CN201435214 Y CN 201435214Y CN 2009200554825 U CN2009200554825 U CN 2009200554825U CN 200920055482 U CN200920055482 U CN 200920055482U CN 201435214 Y CN201435214 Y CN 201435214Y
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- China
- Prior art keywords
- raceway groove
- circuit
- dvd
- oxide
- semiconductor
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- Expired - Fee Related
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Abstract
The utility model discloses a standby control circuit for DVD power boards, which comprises a control terminal CTL, a switching element, a P-channel MOS field effect transistor, a N-channel MOS fieldeffect transistor and a standby circuit STBY, the standby circuit STBY is connected with the drain of the N-channel MOS field effect transistor, and the control terminal CTL controls the P-channel MOSfield effect transistor, the N-channel MOS field effect transistor and the standby circuit STBY by means of the switching element; when the control terminal CTL is at a high or low level, the switching element controls the on-off of the P-channel MOS field effect transistor and the N-channel MOS field effect transistor; and when a DVD needs to stand by, the standby circuit STBY has an input voltage. Without adding another power system, the standby control circuit can ensure that a DVD power supply has a standby voltage, and moreover, the standby control circuit is characterized by high reliability, low cost, low electromagnetic interference, high efficiency and small size.
Description
Technical field
The utility model relates to a kind of improvement circuit of DVD power panel, relates in particular to a kind of readiness control circuit of DVD power panel.
Background technology
For adapt to present product energy-conservation, environmental protection, megatrend requirements such as reliability, a kind of efficient, the demand of the DVD power panel that cost performance is high is just extremely urgent, what the Opportunity awaiting control for linear of at present domestic DVD power panel adopted is that a road independent power supply is controlled, so just be equivalent to increase the another one power-supply system as idle function, this power-supply system need be used high frequency switch transformer, and the employing of the switch transformer of high frequency can increase the generation of circuit high frequency interference, and power supply product cost and power supply are unreliable.Big and stand-by circuit that we adopt can address this problem effectively, adopt the switching tube of some models to come the power supply output system is control effectively, reach the function of Opportunity awaiting control for linear, so just can reach and reduce EMI, reduce cost greatly, save the space of pcb board, improve reliability of products.
The utility model content
The utility model technical issues that need to address are not increase under the situation of another one power-supply system, can make the DVD power supply remain dynamo-electric the pressure.
The utility model technical issues that need to address realize by the following technical solutions: a kind of readiness control circuit of DVD power panel, by control end CTL, on-off element, the metal-oxide-semiconductor of P raceway groove and N raceway groove and stand-by circuit STBY form, described stand-by circuit STBY is connected the metal-oxide-semiconductor D utmost point of N raceway groove, control end CTL is by the metal-oxide-semiconductor and the stand-by circuit STBY of on-off element control P raceway groove and N raceway groove, when control end CTL is in high or low level, metal-oxide-semiconductor conducting by on-off element control P raceway groove and N raceway groove or end, DVD is when standby, and stand-by circuit STBY has input voltage.In the readiness control circuit of above-mentioned DVD power panel, when control end CTL is in high level, DVD work, from the metal-oxide-semiconductor of P raceway groove to DVD output voltage one, from the metal-oxide-semiconductor of N raceway groove to DVD output voltage two; When control end CTL is in low level, the equal no-voltage output of the metal-oxide-semiconductor of P raceway groove and N raceway groove, voltage two is input to stand-by circuit STANDBY.Described voltage one is 12 volts, and described voltage two is 5 volts.Voltage one with the original production process of voltage two is: in circuit front-end of the present utility model, alternating-current voltage source AC (90V-264V) input, through the EMI filtering circuit, after the rectification, direct current is input in the high-frequency transformer, the mode of employing pulse width modulation (PWM) is controlled the working method of high-frequency transformer, the high-frequency transformer output AC voltage, the turn ratio different according to transformer, primary side at transformer is exported two-way voltage respectively, respectively through obtaining the voltage of direct current 12V and 5V behind 12V half-wave rectification and filtering circuit and 5V half-wave rectification and the filtering circuit respectively.
Further: described on-off element is triode Q104, and the base stage of triode Q104 connects control end CTL, triode Q104 emitter/grounded collector.Described P raceway groove is connected filter element with the voltage output end of the metal-oxide-semiconductor of N raceway groove.Described filter element is an electric capacity formation in parallel with polarity free capacitor that polarity is arranged, a related termination voltage output terminal, other end ground connection.Be connected in series current-limiting resistance R223 between described control end and the on-off element.Be connected in series current-limiting resistance R108 between the metal-oxide-semiconductor of described P raceway groove and N raceway groove.
The utility model has utilized the switching characteristic of triode, and the application metal-oxide-semiconductor control effectively to circuit, come power panel is carried out accurate and reliable control by the low-and high-frequency control signal that changes the input power panel, height by control CTL signal level is controlled power work, whether is in holding state thereby effectively reached DVD.Have the reliability height by this stand-by circuit of this stand-by circuit, cost is low, and electromagnetic interference (EMI) is little, the efficient height, and volume is little, is fit to large-scale the application and production.Power panel by this stand-by circuit is formed because independent circuit useless is realized the holding state of DVD, so this DVD power panel can reach and reduce EMI, reduces cost greatly, saves the space of pcb board, improves reliability of products.
Description of drawings:
Fig. 1 realizes the circuit theory diagrams of Opportunity awaiting control for linear for the utility model.
Embodiment:
For the ease of those skilled in the art's understanding, describe in further detail below in conjunction with specific embodiment and 1 pair of the utility model structural principle of accompanying drawing:
A kind of readiness control circuit of DVD power panel, metal-oxide-semiconductor and stand-by circuit STBY by control end CTL, on-off element, P raceway groove and N raceway groove form, described stand-by circuit STBY is connected the metal-oxide-semiconductor D utmost point of N raceway groove, control end CTL is by the metal-oxide-semiconductor and the stand-by circuit STBY of on-off element control P raceway groove and N raceway groove, control end CTL is in height at ordinary times, metal-oxide-semiconductor conducting by on-off element control P raceway groove and N raceway groove or end, DVD is when standby, and stand-by circuit STBY has input voltage.Described on-off element is triode Q104, and the base stage of triode Q104 connects control end CTL, triode Q104 emitter/grounded collector.Described P channel MOS tube is Q103, and the metal-oxide-semiconductor of described N raceway groove is Q102, and Q103 is connected filter element with the voltage output end of the metal-oxide-semiconductor of Q102.The filter element that the metal-oxide-semiconductor of Q103 connects is capacitor C 113 formation in parallel with polarity free capacitor C208 that polarity is arranged, a related termination voltage output terminal, other end ground connection.The filter element that the metal-oxide-semiconductor of Q102 connects is capacitor C 106 formation in parallel with polarity free capacitor C209 that polarity is arranged, a related termination voltage output terminal, other end ground connection.Be connected in series current-limiting resistance R223 between described control end CTR and the on-off element.Be connected in series current-limiting resistance R108 between the metal-oxide-semiconductor of described Q102 and Q103.
DVD gives high level of control end CTL, Q104 base stage B is because of input high level conducting over the ground, because the collector C/ emitter E utmost point conducting over the ground of Q104, directly the metal-oxide-semiconductor Q103 G pole tension with the P raceway groove drags down, metal-oxide-semiconductor D/S conducting, 12V voltage outputs to the DVD mainboard by the metal-oxide-semiconductor Q103 of P raceway groove; When the conducting of Q103 metal-oxide-semiconductor, take out high level from 12V, through being used to control the N type MOS Q102 G base stage at Q102 place after the resistance current limliting of R1081K, metal-oxide-semiconductor Q102 G is high level very, its D/S conducting, therefore the 5V voltage that is produced by the front end power circuit outputs to the DVD mainboard, and DVD is in normal operating conditions; DVD gives low level of control end CTL, Q104 base stage B ends over the ground because of input low level, this moment, metal-oxide-semiconductor Q103 G pole tension was in high level, not conducting of metal-oxide-semiconductor D/S, at this moment, P type MOS Q103 pipe does not have voltage output, when the Q103 metal-oxide-semiconductor does not have conducting, there is not voltage output, be low level, be used to control the N type metal-oxide-semiconductor Q102 G base stage at Q102 place after the resistance current limliting through R108 1K, metal-oxide-semiconductor Q102 G is low level very, its not conducting of D/S, therefore the 5V voltage of front-end circuit does not output to the DVD mainboard, 5V voltage is input to the stand-by circuit STNBY of DVD mainboard from the Q102 D utmost point, thereby the standby power output when effectively utilizing existing power supply to realize that DVD does not work does not need the standby power of extra use special use.
The above is a preferred embodiment of the present utility model, and under the situation that does not break away from the present utility model design, any conspicuous distortion and the replacement carried out all belong within the utility model protection domain.
Claims (6)
1. the readiness control circuit of a DVD power panel, metal-oxide-semiconductor and stand-by circuit STBY by control end CTL, on-off element, P raceway groove and N raceway groove form, it is characterized in that: described stand-by circuit STBY is connected the metal-oxide-semiconductor D utmost point of N raceway groove, control end CTL is by the metal-oxide-semiconductor and the stand-by circuit STBY of on-off element control P raceway groove and N raceway groove, when control end CTL is in high or low level, metal-oxide-semiconductor conducting by on-off element control P raceway groove and N raceway groove or end, DVD is when standby, and stand-by circuit STBY has input voltage.
2, the readiness control circuit of DVD power panel according to claim 1 is characterized in that: described on-off element is triode Q104, and the base stage of triode Q104 connects control end CTL, triode Q104 emitter/grounded collector.
3, want the readiness control circuit of the DVD power panel shown in 2 according to right, it is characterized in that: described P raceway groove is connected filter element with the voltage output end of the metal-oxide-semiconductor of N raceway groove.
4, want the readiness control circuit of the DVD power panel shown in 3 according to right, it is characterized in that: described filter element is an electric capacity formation in parallel with polarity free capacitor that polarity is arranged, a related termination voltage output terminal, other end ground connection.
5, want the readiness control circuit of the DVD power panel shown in 4 according to right, it is characterized in that: be connected in series current-limiting resistance R223 between described control end and the on-off element.
6, want the readiness control circuit of the DVD power panel shown in 5 according to right, it is characterized in that: be connected in series current-limiting resistance R108 between the metal-oxide-semiconductor of described P raceway groove and N raceway groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200554825U CN201435214Y (en) | 2009-04-21 | 2009-04-21 | Standby control circuit for DVD power boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200554825U CN201435214Y (en) | 2009-04-21 | 2009-04-21 | Standby control circuit for DVD power boards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201435214Y true CN201435214Y (en) | 2010-03-31 |
Family
ID=42054029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200554825U Expired - Fee Related CN201435214Y (en) | 2009-04-21 | 2009-04-21 | Standby control circuit for DVD power boards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201435214Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867505A (en) * | 2015-05-06 | 2015-08-26 | 杰发科技（合肥）有限公司 | Vehicle-mounted terminal DVD navigation machine |
-
2009
- 2009-04-21 CN CN2009200554825U patent/CN201435214Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867505A (en) * | 2015-05-06 | 2015-08-26 | 杰发科技（合肥）有限公司 | Vehicle-mounted terminal DVD navigation machine |
| US9805758B2 (en) | 2015-05-06 | 2017-10-31 | Autochips Inc. | DVD navigator based on a vehicle-mounted terminal capable of unloading disc in the sleep state |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20110421 |