Dragon -ZL-2801A DVD machine type switching power supply circuit

The Dragon ZL-2801A is a DVD machine that utilizes a switching power supply circuit. The circuit primarily consists of an AC input circuit, a rectifier filter wave circuit, an oscillation circuit switch, a switch transformer (Tl), a secondary rectifier, and a voltage regulator circuit.

1. AC Input Circuit: The AC input circuit includes a power switch (S), a fuse (F1), a mutual inductance filter (LF), and filter capacitors (C1, C2). Its primary function is to filter out interference and noise from the AC input signal.

2. Rectifier Filter Circuit: The 22V AC voltage is processed through a bridge rectifier circuit (D1 to D4) and a filter capacitor (C3), resulting in an output DC voltage of approximately 30V that is sent to the transformer (Tl).

The Dragon ZL-2801A DVD machine's switching power supply circuit is designed for efficiency and reliability. The AC input circuit is essential for protecting the device from voltage spikes and ensuring stable operation. The power switch (S) allows for manual control of the power supply, while the fuse (F1) serves as a safety feature, preventing damage from overcurrent conditions.

The mutual inductance filter (LF) plays a crucial role in attenuating high-frequency noise that may be present in the AC supply. The filter capacitors (C1 and C2) further smooth the input signal, ensuring that the downstream components receive a cleaner voltage.

In the rectifier filter circuit, the bridge rectifier (composed of diodes D1 to D4) converts the AC voltage to DC. This process is critical for providing the necessary power to the DVD machine's internal components. The filter capacitor (C3) stabilizes the output voltage by storing charge and releasing it as needed, resulting in a more consistent DC voltage output. The voltage regulator circuit that follows ensures that the output voltage remains within specified limits, providing reliable power to the system.

The transformer (Tl) is responsible for isolating the power supply and stepping down the voltage as required by different sections of the DVD machine. The switching operation within the circuit allows for efficient power conversion, minimizing energy loss and maximizing performance. Overall, the design and components of the Dragon ZL-2801A's switching power supply circuit are integral to its functionality and longevity.Dragon -ZL-2801A DVD machine type switching power supply circuit It shows Dragon ZL-2801A type DVD machine switching power supply circuit, which is mainly from the AC input cir cuit, a rectifier filter wave circuit, the oscillation circuit switch, switch transformer Tl, secondary rectifier and voltage regulator circuit constituted. 1. AC input circuit AC input circuit from the power switch S, fuse Fl, mutual inductance LF filter and filter capacitor Cl, C2 and the like, its function is to filter the AC input signal interference and noise.

2. Rectifier filter circuit after 22V AC voltage is filtered heap D1 ~ D4 bridge rectifier circuit filter capacitor C3 and processed by a bridge rectifier, and the output DC voltage of about 30V transformer and switch to TIs O feet.