5results about How to "High output voltage accuracy" patented technology

The utility model discloses a single winding double output high -power power supply, including with the filter rectifier circuit of alternating current input connection, with the PFC circuit of filter rectifier circuit output connection, with the flyback two constant voltage output circuits of PFC circuit output connection. Flyback two constant voltage output circuit includes the integrated chip IC3 of setting between transformer TR2 primary side circuit and transformer TR2 secondary side winding, is provided with the pin 5 and pin 9 of being connected with transformer TR2 secondary side winding respectively on integrated chip IC3, pin 9 is connected through field effect transistor Q3 and with field effect transistor Q3 series connection setting's first output branch, and first output branch exports 15v voltage, pin 5 is connected through field effect transistor Q2 and with field effect transistor Q2 series connection setting's second output branch, and second output branch exports 12v voltage. The utility model discloses power supply second road output voltage power accuracy is at 3 5%, can satisfy the occasion of high output requirement.

This invention discloses a pulse output circuit and a high-voltage pulse power supply. The pulse output circuit includes: at least one output unit; each output unit includes two basic units, each basic unit including a power supply unit and a pulse network; each pulse network includes a bridge arm and an energy storage capacitor, the high-potential ends of which are connected to the positive output terminal of the corresponding power supply unit, and the low-potential ends of which are connected to the negative output terminal of the corresponding power supply unit. The midpoint of the first pulse network bridge arm is the positive output terminal of the corresponding output unit, the low-potential end of the first pulse network bridge arm is connected to the high-potential end of the second pulse network bridge arm, and the midpoint of the second pulse network bridge arm is the output terminal of the corresponding output unit; the positive output terminal of the first output unit is the positive output terminal of the pulse output circuit, the negative output terminal of the preceding output unit is connected to the positive output terminal of the following output unit, and the negative output terminal of the last output unit is the negative output terminal of the pulse output circuit. This invention can improve the accuracy of the pulse output voltage and eliminate pulse tailing.

According to the adjustable output isolation driving power supply circuit with the wide input voltage range, the first-stage DC-DC conversion circuit inputs a wide-range first voltage signal, converts the wide-range first voltage signal into a stable second DC voltage signal, and outputs the stable second DC voltage signal to the second-stage isolation DC-DC conversion circuit, so that a wider input power supply range can be realized; the second-stage isolation DC-DC conversion circuit converts the second DC voltage signal into a third DC voltage signal and outputs the third DC voltage signal to the high-precision voltage stabilizing circuit; the high-precision voltage stabilizing circuit takes an LT431 voltage reference chip as a core, and outputs stable direct-current positive voltage signals and negative voltage signals through feedback voltage regulation of the regulating circuit, so that high-precision, simple and adjustable driving output voltage can be realized.

The utility model discloses a high voltage output DCDC power supply module, which comprises a shell, a PCB and an installation epoxy board, the shell is a cavity structure with an opening at the bottom, the PCB is arranged in the shell and is fixed by pouring AB glue, four pins are arranged on the PCB, the four pins penetrate out of the installation epoxy board, and the installation epoxy board covers the bottom of the shell and is fixed with the AB glue in the shell in a contact and bonding manner. The PCB is encapsulated in the cavity of the shell through AB glue by adopting the shell and the mounting epoxy board, so that the power module can be protected and prevented from being influenced by the outside, the mounting epoxy board plays a role in stabilizing the pins and prevents the connection reliability of the PCB from being influenced, the electrical connection between the pins and the PCB is more stable, and the AB glue is encapsulated inside, so that the reliability of the power module is improved. On one hand, an elastic buffering effect is achieved, internal components are prevented from being damaged due to huge vibration, on the other hand, an effect of isolating external influence can be achieved, and the service life is prolonged.

The application discloses a band gap reference circuit and a chip, and the band gap reference circuit comprises a first MOS transistor, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, an amplifier and an adjustable resistor unit. Compared with a traditional band gap reference circuit structure, the circuit structure of the application is simple, the output voltage precision is high, the noise of a power supply and ground is well inhibited, the interference of a reference voltage caused by a large ground noise in a DCDC converter and the like can be well solved, and the application can be widely applied to a semiconductor integrated circuit as a high-performance reference circuit.