V90Amos tube driver chip selection , 600V95A, 600V100A, 600V110A, 600V120Amos tube driver chip selection .
mos tube models are mos tube driver chip selection : Enhanced mos tube mos tube driver chip selection : The gate source voltage of the enhanced mosfet with dual gate structure or depletion layer structure is about 8v. Schottky Barrier diode mos tube driver chip selection : Its forward drain current density can reach 100a/dtl or more. The device can withstand large inrush current when operating in the reverse breakdown region. Single-channel enhanced: It has a forward drain current density of 200a/dtAbove.
IRFU0IRFPG4IRFPF40, IRFP9240, IRFP9140, IRFP240. The FieldEffectTransistor (FET) is a field effect transistor. There are two main types (JunctionFet-JFET) and metal-oxidesemiconductor field effect tubes (metal-oxidesemiconductorFets, referred to as MOS-FETs). A majority of carriers participate in conducting electricity, also known as a unipolar transistor.
Power supply tube (MOS tube) : K787 N-MOS GDS 900V8A150W95/240nS6 K2645 N-MOS GDS 600V 9A 50W K3451 N-MOS GDS 600V 13A 80W 10N60 N-MOS GDS 600V10A BUZ91A N-FET 600V 8A 150W 0.9Ohm and many other models.
1, the selection criteria of the driver chip When selecting the driver chip, the technical parameters are decisive. The drive current should be greater than the minimum requirements shown in formula (7), the power consumption should cover the calculated power, the transmission delay consistency ensures the consistency of the dead zone time, the insulation voltage should be higher than twice the rated voltage of the MOS tube, and the common-mode transient suppression should be able to effectively withstand the dV/dt shock in the circuit.
2, the choice of the appropriate MOSFET tube is crucial to the design of the drive circuit. Should be selected with low on-resistance, low reverseMOSFET tube with repeated charge and high switching speed. In addition, the appropriate voltage and current capacity should 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, many motor drivers are integrated charge pump, it should be noted that the appropriate external capacitor should be selected to get enough short circuit current to drive the MOS tube. The 4V or 10V mentioned above is the on-voltage of the commonly used MOS tube, and of course there is a certain amount of surplus when designingAmount. And the higher the voltage, the faster the switching speed, the smaller the switching resistance.
To drive large-capacity MOSFET, it is necessary to provide a short-time instantaneous high current mos tube driver chip selection , and maintain a suitable mos tube driver chip selection gate source voltage (10 ~ 15V)
is a 100V10A pipe, there is no margin of full load work is not reliable, you can choose 50N06, it is 50A60V.
mos tube driver chip selection You seeLet's see if this chip works. IR2101 is the chip that drives the MOS tube. If you want low cost you can only use two transistors in a push-pull circuit.
How to drive the MOS tube commonly used microcontroller is generally divided into 5V microcontroller and 3V microcontroller, the high level voltage output of the IO port of the microcontroller can be close to the power supply voltage, but it will be smaller than the power supply voltage.
1, ③ switch tube selection 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 of product or a military product with a quality grade above MIL-M-385MIL-S-19500 standard B-1.
2, the exquisite design of the main circuit: limiting, filtering, rectification, inverter and output rectification, each link is indispensable, they work together, like a dancer on the stage, precisely regulate the rhythm of the voltage. Width adjustmentBy adjusting the pulse width, the tuned-width regulator is like a musician's tuner, ensuring that the output voltage is stable as silk.
3, the switch tube is opened instantaneously, the drive circuit should be able to provide enough charging current to make the MOSFET gate source voltage quickly rise to the required value, to ensure that the switch tube can be opened 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.
4, in the design of high-power switching power supply, in order to prevent the impact of high inrush current at start-up, it is often usedSoft start circuit, this design does not focus on the introduction. 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.
The first step in selecting a good MOS tube device is to decide whether to use an n-channel or P-channel MOS tube. In typical power applications, when a MOS tube is grounded and the load is connected to the main line voltage, the MOS tube is constructed as a low-voltage side switch. In the low-voltage side switch, the N-channel MOS tube should be used, which is due to the voltage required to turn off or switch on the device. When the MOS tube is connected to the bus and the load ground, the high voltage side is used to open and close.
P channel tube is not generally as good as N channel tube performance, and easy to damage, the same NPN triode than PNP triode is much better.The reason is that most of the carriers at the output end of the N channel are electrons, which are combined with the wire electrons, while most of the carriers in the P channel are holes, and there is a displacement process with the wire electrons, which increases the loss.
MOSFET tube is a kind of FET (the other is JFET), can be manufactured into enhanced or depleted type, P channel or N channel a total of 4 types, but the actual application of only enhanced N channel MOS tube and enhanced P channel MOS tube, so usually referred to NMOS, or PMOS refers to these two kinds. As for why not use a depletion MOS tube,Getting to the bottom of it is not recommended. For these two enhanced MOS tubes, the more commonly used is NMOS.
MOSFET tube A kind of FET (the other is JEFT), can be manufactured into enhanced or depleted type, P channel or N channel a total of 4 types, but the actual application of only enhanced N channel MOS tube and enhanced P channel MOS tube, so usually mentioned NMOS, or PMOS refers to these two kinds. As for why it is not suitable for the MOS tube of the depletion type, it is not recommended to ask the root of it. For these two enhanced MOS tubes, the more commonly used is NMOS.
1, the power chip test socket has a variety of optional functions. According to different test requirements, you can choose different modules, such as voltage regulation module, current limiting module, power regulation module, etc., to meet the test requirements of different power chips. In addition, you can also choose different communication interfaces, such as USB interface, RS232 interface, etc., to facilitate data transmission and control with computers or other devices.
2, TMS320VC33: TPS73HD318PWP, the specifications of the power supply chip are 5V to 3V and 8V, and the maximum current is 750mA. TMS320VC54xx: TPS73HD318PWP, the applicable power supply chip specifications are voltage 5V to 3V and 8V, the maximum current 750mA; TPS73HD301PWP, the specifications of the power supply chip that can be used are 5V to 3V and adjustable, and the maximum current is 750mA.
3, recently done in the circuit, is the input 12V, output 3V, output current 150ma, requiring low power consumption. Want to chooseChoose a power chip, please help recommend a model.
4, input voltage: Input voltage refers to the DC/DC power module can normally operate the range, generally the more common power system, usually divided into 5V, 12V, 24V, 48V.
5, according to the output power (output voltage, output current), the original peak current can be calculated, and then more than 2 times the value of the appropriate MOS, and then according to the voltage and current required by the MOS G, to select the corresponding output capability of the switch chip. Dc power load: PLC touch screen