Choosing the right mosfet tube for the mosfet driver chip is crucial to the design of the driver circuit mosfet driver chip . MOSFET tubes with low on-resistance, low reverse recovery charge, and high switching speed should be selected. In addition mosfet driver chip The appropriate voltage and current capacity should also be selected to meet the needs of practical applications. The driver circuit IC is responsible for controlling the switching state of the MOSFET tube. Choosing the right driver IC can improve the stability and efficiency of the system.
③ Switching tube MOSFET can simplify the drive circuit and reduce the loss. ④ The output rectifier tube should use a diode with soft recovery characteristics as far as possible. ⑤ should choose metal packaging, ceramic packaging, glass packaging devices. Do not use plastic encapsulated devices. The integrated circuit must be a class I product or comply with MIL-M-385MIL-S-19500 standard B-1 or above quality grade military products.
Triode current control, MOS tube belongs to voltage control, BJT amplifies the current, FET converts the gate voltage to drain current.
When the switch tube is turned on, the drive circuit should be able to provide a large enough charging current to make the MOSFET gate source voltage rise rapidly to the required value, so as to ensure that the switch tube can be turned on quickly and there is no high frequency oscillation of the rising edge. (2) During switching, the drive circuit can ensure that the MOSFET gate source electrode voltage remains stable and reliable.
inIn the design of high-power switching power supply, in order to prevent the impact of high inrush current during start-up, soft starting circuit is often used, which is not introduced in this design. The rectifier and filter circuit adopts the full-bridge rectifier circuit, as shown in Figure 6 below. The output current is required to reach a maximum of 8A, considering the power loss and a certain margin, choose 10A square bridge KBPC3510 and 10A fuse. The rectified voltage reaches 310V, and two 250V/100uF capacitors are used for filtering.
1, the drive ability of the driver is not enough. The ir2127 is a gate driver designed to drive a single MOSFET or IGBT using high voltage integrated circuit technology and latchless CMOS technology in a dual in-line package for use in systems with operating bus voltages up to 600V. The input is compatible with the standard CMOS level, and the output drive characteristics can meet the design requirements of the high-current drive output stage with the shortest cross-on-time.
2, IR2127S is a high-voltage thyristor switching device, which contains an NA channeled FET and a P-channeled FET, and a set of control inputs for controlling the output. The output voltage of this device can be adjusted according to the voltage of the control input, which has good stability and reliability. It is commonly used in power electronics for PWM modulation.
1, MOSFET driver chip. The S4427 is a MOSFET driver chip mosfet driver chip , mainly used to drive high powerRate switching circuit mosfet driver chip , because of its internal integration mosfet driver chip A large number of voltage amplifier, current amplifier and other functional modules mosfet driver chip , The input voltage is about 5V to meet the control signal of the ordinary logic level.
2, the irs4427 chip is an integrated circuit composed of a large number of transistors, which can be manufactured on the surface of the semiconductor chip for calculationAnd deal with.
3, not general. Although s4427 and ir4427 are in-line DIP-8 switching power management chips, the size used on the supporting parts is not the same, which leads to the mosfet driver chip their model and configuration are not the same, so it is not common.
4, not general. The size of the TC4427 chip is about 5-6mm, while the size of the S4427 chip is only 3mm, which is different in size and cannot be used universally. The current that the TC4427 chip can pass is0.8A, and the S4427 chip can pass the current of 0.5A, through the current is inconsistent, general words may lead to data loss, so can not.
5, is the heart, to complete the calculation, processing tasks. Is what you do, to the computer is it, the chip is actually a highly integrated circuit board can also be called IC, such as the computer CPU is actually a chip different ics have different roles, such as video coding/decoding IC and is specifically used to process video data, audio coding/decoding IC is used to process sound.