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CN-224218378-U - Circuit for switching on or switching off DSP power supply by utilizing LDO delay

CN224218378UCN 224218378 UCN224218378 UCN 224218378UCN-224218378-U

Abstract

The utility model discloses a circuit for switching on or switching off DSP power supply by utilizing LDO delay, which comprises a low-dropout voltage regulator, wherein an access circuit, a delay switching-on circuit and a delay switching-off circuit are arranged in the low-dropout voltage regulator, the circuit overcomes the harmful pop noise generated by the DSP during startup and shutdown in the prior art, and can realize the control of the delay startup and delay shutdown circuits of the vehicle-mounted DSP by using a simple and low-cost circuit, thereby solving the pop noise caused by startup and shutdown of the current vehicle-mounted DSP due to power supply; the circuit utilizes LDO, changes the low dropout voltage regulator and shares 4 pins, is power input end, power output end, earthing end and enabling end respectively, the power input output scope of the LDO can be well adapted to the requirement of automobile voltage, in the delay starting circuit, the delay of the starting circuit is flexibly adjusted by setting the configuration values of the resistor and the capacitor.

Inventors

  • QIAN JUN
  • LI LU

Assignees

  • 武汉雅极韵科技有限公司

Dates

Publication Date
20260508
Application Date
20250610

Claims (6)

  1. 1. A circuit for switching on or switching off power supply of a DSP by utilizing LDO delay comprises a low dropout regulator (4) and is characterized in that a power input terminal connector (8), a power output terminal connector (9), a grounding terminal connector (10) and an enabling terminal connector (11) are fixedly arranged on one side of the low dropout regulator (4) from left to right in sequence, and an access circuit, a delay switching-on circuit and a delay switching-off circuit are arranged in the low dropout regulator (4).
  2. 2. The circuit for switching on or switching off DSP power supply by utilizing LDO delay as claimed in claim 1, wherein a four-pole circuit breaker P4 is arranged in the access circuit, a terminal pin 1 of the four-pole circuit breaker P4 is connected with a 12V+ power supply, a terminal pin 2 of the four-pole circuit breaker P4 is grounded, a terminal pin 3 of the four-pole circuit breaker P4 is connected with an input power supply 1K resistor, and a terminal pin 4 of the four-pole circuit breaker P4 is connected with an output power supply 1K resistor-OUT.
  3. 3. The circuit for switching on or switching off power supply of the DSP by utilizing LDO delay according to claim 1, wherein the delay switching-on circuit comprises an integrated circuit U1, a resistor R1, a capacitor C2, a fuse F1, a MOS tube Q1, a resistor R4 and a resistor R5, wherein a1 terminal pin of the integrated circuit U1 is connected with one end of the fuse F1, the other end of the fuse F1 is connected with one end of the MOS tube Q1, the other end of the MOS tube Q1 is respectively connected with one end of a resistor R4 and one end of a resistor R5, a 4 terminal pin of the integrated circuit U1 is respectively connected with one end of the resistor R1 and one end of the capacitor C2, and the other end of the resistor R5, a3 terminal pin of the integrated circuit U1, the other end of the resistor R1 and the other end of the capacitor C2 are all grounded.
  4. 4. The circuit for switching on or switching off power supply of DSP by LDO delay according to claim 1, wherein the delay switching-off circuit comprises an integrated circuit U2, a capacitor C1, a resistor R2 and a resistor R3, wherein a 4-terminal pin of the integrated circuit is respectively connected with one end of the capacitor C1, one end of the resistor R2 and one end of the resistor R3, and the 3-terminal pin of the integrated circuit U2, the other end of the capacitor C1 and the other end of the resistor R2 are grounded.
  5. 5. The circuit for switching on or switching off DSP power supply by LDO delay according to claim 1, wherein one side of the low dropout regulator (4) is provided with a field effect type pipe SI2308 (3), two ends of one side of the field effect type pipe SI2308 (3) are respectively provided with a 1K resistor (1) and a 10K resistor (2), one end of the low dropout regulator (4) is provided with a 10M ohm resistor (5), the other end of the low dropout regulator (4) is provided with a 1uf capacitor (6), one end of the 1K resistor (1) and one end of the 10K resistor (2) are connected with one end of the field effect type pipe SI2308 (3), the other end of the field effect type pipe SI2308 (3) is fixedly connected with a self-recovery fuse (7), and one end of the self-recovery fuse (7), one end of the 10M ohm resistor (5) and one end of the 1uf capacitor are connected with one end opposite to the low dropout regulator (4).
  6. 6. The circuit for switching on or switching off power supply of the DSP by utilizing LDO delay as claimed in claim 1, wherein one end of the low dropout regulator (4) is provided with an 8.06K resistor (12), the other end of the low dropout regulator (4) is provided with a 220uf capacitor (13) and a 1K resistor (1), one end of the 1K resistor (1) is connected with one end of the 220uf capacitor (13), and the other end of the 220uf capacitor (13) and one end of the 8.06K resistor (12) are connected with the opposite side of the low dropout regulator (4).

Description

Circuit for switching on or switching off DSP power supply by utilizing LDO delay Technical Field The utility model relates to the technical field of DSP power supply control circuits, in particular to a circuit for switching on or switching off DSP power supply by utilizing LDO delay. Background Along with the development of economy and the improvement of the living standard of people, the automobile sound equipment is more and more approaching to the living of people, and the control of the automobile sound equipment is accurate, so that the practical requirement is higher and higher. However, conventional DSP circuits suffer from the following disadvantages: At present, most DSPs do not have circuits for controlling the delay on or off of the equipment, and when the music starts to be played, the DSP is started too fast to easily generate starting pop sound, and when the music is finished to be played, the DSP is started too slow and too fast to be turned off, so that the pop sound is also caused, the experience of a driver for listening to the music is affected, and the normal driving of the driver is further affected. Disclosure of utility model The utility model aims to provide a circuit for starting or disconnecting power of a DSP by utilizing LDO delay, which solves the problems that at present, most of DSPs do not have circuits for controlling the delay of the device to be started or disconnected, the starting of the DSP is easy to generate a starting pop sound when music starts to be played, meanwhile, the slow and fast switching off of the DSP can also cause the pop sound when the music is finished to be played, the experience of a driver for listening to the music is influenced, and even the normal driving of the driver is influenced. The circuit for switching on or switching off the DSP power supply by utilizing the LDO delay comprises a low-dropout voltage regulator, wherein one side of the low-dropout voltage regulator is fixedly provided with a power input terminal connector, a power output terminal connector, a grounding terminal connector and an enabling terminal connector in sequence from left to right, and an access circuit, a delay switching-on circuit and a delay switching-off circuit are arranged in the low-dropout voltage regulator. Preferably, a four-pole circuit breaker P4 is arranged in the access circuit, a terminal pin 1 of the four-pole circuit breaker P4 is connected with a 12v+ power supply, a terminal pin 2 of the four-pole circuit breaker P4 is grounded, a terminal pin 3 of the four-pole circuit breaker P4 is connected with an input power supply 1K resistor, and a terminal pin 4 of the four-pole circuit breaker P4 is connected with an output power supply 1K resistor-OUT. Preferably, the delay starting circuit comprises an integrated circuit U1, a resistor R1, a capacitor C2, a fuse F1, a MOS tube Q1, a resistor R4 and a resistor R5, wherein the 1 terminal pin of the integrated circuit U1 is connected with one end of the fuse F1, the other end of the fuse F1 is connected with one end of the MOS tube Q1, the other end of the MOS tube Q1 is respectively connected with one end of the resistor R4 and one end of the resistor R5, the 4 terminal pin of the integrated circuit U1 is respectively connected with one end of the resistor R1 and one end of the capacitor C2, and the other end of the resistor R5, the 3 terminal pin of the integrated circuit U1, the other end of the resistor R1 and the other end of the capacitor C2 are grounded. Preferably, the delay turn-off circuit comprises an integrated circuit U2, a capacitor C1, a resistor R2 and a resistor R3, wherein the 4 terminal pin of the integrated circuit is respectively connected with one end of the capacitor C1, one end of the resistor R2 and one end of the resistor R3, and the 3 terminal pin of the integrated circuit U2, the other end of the capacitor C1 and the other end of the resistor R2 are grounded. Preferably, a field effect type pipe SI2308 is arranged on one side of the low dropout regulator, 1K resistor and 10K resistor are respectively arranged at two ends of one side of the field effect type pipe SI2308, 10M ohm resistor is arranged at one end of the low dropout regulator, 1uf capacitor is arranged at the other end of the low dropout regulator, one end of the 1K resistor and one end of the 10K resistor are connected with one end of the field effect type pipe SI2308, a self-recovery fuse is fixedly connected with the other end of the field effect type pipe SI2308, and one end of the self-recovery fuse, one end of the 10M ohm resistor and one end of the 1uf capacitor are connected with one end opposite to the low dropout regulator. Preferably, one end of the low dropout regulator is provided with an 8.06K resistor, the other end of the low dropout regulator is provided with a 220uf capacitor and a 1K resistor, one end of the 1K resistor is connected with one end of the 220uf capacitor, and the other end of the 220uf