FSP107-2PS01 two-in-one power panel circuit analysis

Description: The main component is the LG26 one-inch screens integrated with the FSP107-2PS01 two-in-one electrical power package, which utilizes a direct drive CCFL modulator tube. This setup is compatible with screens from other manufacturers, such as Samsung and AU, but requires a balance plate for operation. The power supply has two voltage outputs: the first is 12V for integrated circuit sound accompaniment, and the second is a 5V standby voltage (5VSTB) rated at 1A, which provides power for the motherboard and signal processing sections. An anti-jamming circuit composed of various components (Fl01, RV101, TH101, C102-C105, Rl01-R103, L102, L103) enhances the electromagnetic compatibility of the television. This circuit is designed to suppress high-frequency interference that could disrupt TV operation, while also preventing interference from the switching power supply from affecting other electronic devices. L101 and L102 are common mode choke coils, wound in opposite directions on the same magnetic core to counteract magnetic flux saturation and effectively reduce common-mode interference. Capacitors C102 and C103 help mitigate interference between the live and neutral wires. The power factor correction (PFC) circuit employs the FAN6961 IC120 from Siemens, which is an 8-pin device capable of accurately adjusting the output DC voltage to improve power factor. The IC operates with a service voltage of up to 25V, a starting current under 25A, and a working current below 6mA. The circuit includes zero-current measurement and cycle current limiting functionalities. Upon startup, a high-level signal from the motherboard activates Q262, which in turn triggers a series of components, ultimately resulting in a high output voltage of approximately 15.07V to IC120. The internal circuitry of IC120 generates a driving signal for the MOSFET, enabling the power supply to function in an on-off state. A voltage of around 300V is applied to the switching tube of Q120 via inductance L120, allowing the stored energy to produce a DC voltage of approximately 400V across capacitor C610. The voltage amplifier within IC120 processes the output voltage, which is then detected through a feedback network involving resistors R120, R123, and R124. The voltage amplifier's output is integrated with capacitors C124, C123, and resistor R133 to initiate the switching power supply. The PFC circuit generates a voltage that is passed through transformer T600, which facilitates the soft start of the MOSFET U601. When the voltage across capacitor C606 reaches 8.9V, U601 is activated, allowing current to flow through T600.

The described circuit serves as an essential component in power management and electromagnetic interference suppression within electronic systems, particularly in television applications. The integration of the LG26 screens with the FSP107-2PS01 power package allows for efficient operation and compatibility with various display technologies. The dual voltage outputs cater to different operational requirements, ensuring that both audio processing and standby functions are adequately supported.

The anti-jamming circuit plays a crucial role in maintaining signal integrity by utilizing common mode choke coils, which are specifically designed to mitigate high-frequency noise. The careful arrangement of components within this circuit, including capacitors and resistors, contributes to the overall stability and reliability of the television's performance.

The implementation of the FAN6961 IC120 for power factor correction is noteworthy, as it provides advanced control over the power supply's efficiency and stability. The ability to adjust the output voltage and monitor the power factor enhances the overall performance of the device, making it suitable for modern electronic applications where energy efficiency is paramount.

In conclusion, this circuit exemplifies the integration of advanced electronic components to achieve reliable power management and effective interference suppression, ensuring optimal performance in television systems and other electronic devices.Main matched LG26 one inch of screens of FSP107-2PS01 two-in-one electrical power package, direct drive CCFL modulator tube, its material object is shown as in Fig. 1. If cooperate with other producers For instance Samsung, AU, etc. Screen at, it is only at screen use with balance plately, otherwise not can`t use. The voltage of two set of this power supply: First, 12V voltage, integrated circuit to accompanying sound, at if you can`t reject by feed circuit, etc. , supply power, and voltage doubling later for in put it is integrated R. F. head electrical supply; Second, 5VSTB 1A Voltage, await the opportune moment for the mother board some and dwarf signal treated section supply power. Antijamming circuit is made up together by Fl01, RV101, TH101, C102-C105, Rl01-R103, L102, L103, its function is to strengthen the electromagnetic compatibility of television.

This circuit is bilateral, it can inhibit high frequency interference from entering the TV on one hand, guarantee the normal operation of the television, on the other hand the high frequency interference produced in its repressible switching power supply enters electric wire netting, interfere with other electric equipment. L101, L102 are choke coils of common mode, wind in an absolute coil of the same magnetic ring seven, number of rounds the same, wind to opposite, magnetic flux that produce offset each other in magnetic ring, the magnetic core will not be saturated, mainly inhibit the common-mode interference, it is the better to the glitch depressing effect that the inductance is the greater.

Electric capacity C102, C103 mainly inhibits the interference between live wire and zero line, it is the better to the glitch depressing effect that capacitance value is the greater. Power factor correction PFC The circuit adopts the new power factor correction control device FAN6961 IC120 of production of Siemens Company, 8 pins are capsulated, can adjust the direct-current volts exported accurately, thus achieve the updated purpose of the power factor.

The service voltage of power of this IC can be up to 25V, the starting current is lower than 25 A, the working current can be lower than 6mA, can carry on zero-current measuring and cycle one by one current limiter, its pin function and surveying the voltage and is shown in Table 1. After the two-shot starting up, card CN201 one Foot STB Get a high level from the mother board, Q262 turns on, the photosensitive resister PC700 is turned on, Q700 turns on, 15.

07V voltage that its e outputs very much, add to IC120 Foot. The break in of the internal circuit after IC120 is electrified, from IC120 Foot output the intersection of MOSFET and driving signal, add grid of Q120 to after Q121 encourages, make it work in on-off state. The intersection of 300V and direct-current volts add to the intersection of gas switching tube and D of Q120 very much by the intersection of inductance and L120 by PFC, because the stored energy of L120 acts on, after the vibratory switch pulse is commutated by D120, obtain direct-current volts of about 400V on C610.

IC120 The voltage amplifier oppisite phase input end of inscribed of foot, its equal phase inputs head joint 2. 5V reference voltage. PFC output voltage passes the resistance R120 after R123 and R124 partial pressure and IC120 The foot links up, realize the detection of PFC output voltage.

1C120 The foot is the Ausgang of the internal voltage amplifier, through feedbacking the integration network electric capacity C124, C123 and resistance R133 1 Start of switching power supply, 4CXN voltage that vibration PFC circuit produces, pass the voltage transformer T600 One Coil add drain of MOS tube inside the U601 to, pass internal soft starting circuit to The foot connects the electric capacity C606 to charge, when the voltage of electric capacity C606 both ends rises to 8. 9V, U601 begins to shake, T600 one There is passing of current, T600