CN220754653U - Anti-static module power supply - Google Patents

Abstract

The utility model discloses an anti-static module power supply, which relates to the field of direct current power supplies, and comprises a push-pull type transformer driver U2, wherein the model of the push-pull type transformer driver U2 is JT25X, the VD1 end of the push-pull type transformer driver U2 is connected with the first end of a transformer W, the VIN end of the push-pull type transformer driver U2 is connected with the second end of the transformer W and a power supply voltage VIN1, the VD2 end of the push-pull type transformer driver U2 is connected with the third end of the transformer W, and the GND end of the push-pull type transformer driver U2 is grounded, and the anti-static module power supply has the beneficial effects that: by setting a JT25X as a variable-voltage driving device, the volume is small, and the final power integration level of the generated module is high; the whole circuit has simple structure, simple production process, high production efficiency and consistency of products; and JTE8KV is additionally arranged, so that the module power supply has extremely high antistatic capability and surge voltage control capability.

Description

Anti-static module power supply

Technical Field

The utility model relates to the field of direct current power supplies, in particular to an anti-static module power supply.

Background

The current DC-DC modules mostly adopt self-excited push-pull circuits, as shown in figure 1, and all adopt separation devices to generate self-excited oscillation.

The circuit has the following defects: the number of components is large, the transformer needs an auxiliary winding Nf, and the PCB space of the module power supply is extremely small, so that the PCB design difficulty is high, the production process is complex, the production efficiency is low, and improvement is needed.

Disclosure of Invention

The present utility model is directed to an antistatic module power supply, which solves the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an antistatic module power, includes push-pull type transformer driver U2, push-pull type transformer driver U2's model is JT25X, push-pull type transformer driver U2's VD1 end connects transformer W's first end, push-pull type transformer driver U2's VIN end connects transformer W's second end, supply voltage VIN1, push-pull type transformer driver U2's VD2 end connects transformer W's third end, push-pull type transformer driver U2's GND ground connection.

As still further aspects of the utility model: the anti-static module power supply further comprises an anti-static module, the anti-static module comprises a protector U1, the model of the protector U1 is JTE8KV, one end of the protector U1 is connected with a power supply voltage VIN1, and the other end of the protector U1 is grounded.

As still further aspects of the utility model: the anti-static module power supply further comprises an input filter module, the input filter module comprises a capacitor C1, one end of the capacitor C1 is connected with a power supply voltage VIN1, and the other end of the capacitor C1 is grounded.

As still further aspects of the utility model: the anti-static module power supply further comprises an output rectifying and filtering module, the output rectifying and filtering module comprises a diode D1, a diode D2, a capacitor C2 and a resistor R1, the positive electrode of the diode D1 is connected with the fourth end of the transformer W, the positive electrode of the diode D2 is connected with the sixth end of the transformer W, the negative electrode of the diode D1 is connected with the negative electrode of the diode D2, one end of the capacitor C2, one end of the resistor R1 and the output voltage VOUT, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, and the fifth end of the transformer W is grounded.

As still further aspects of the utility model: the output rectifying and filtering module is provided with a plurality of output rectifying and filtering modules.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, by setting one JT25X as a variable-voltage driving device, the volume is small, and the final generation module has high power integration level; the whole circuit has simple structure, simple production process, high production efficiency and consistency of products; and JTE8KV is additionally arranged, so that the module power supply has extremely high antistatic capability and surge voltage control capability.

Drawings

Fig. 1 is a circuit diagram of a conventional module power supply.

Fig. 2 is a circuit diagram of an antistatic module power supply.

Fig. 3 is a schematic diagram of the internal structure of JT 25X.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.

Referring to fig. 2, an anti-static module power supply includes a push-pull transformer driver U2, wherein the type of the push-pull transformer driver U2 is JT25X, the VD1 end of the push-pull transformer driver U2 is connected to the first end of the transformer W, the VIN end of the push-pull transformer driver U2 is connected to the second end of the transformer W, the supply voltage VIN1, the VD2 end of the push-pull transformer driver U2 is connected to the third end of the transformer W, and the GND end of the push-pull transformer driver U2 is grounded.

In a specific embodiment, referring to fig. 2 and 3, jt25x controls whether VD1 and VD2 are conducted or not, so that a current flow direction from the second end to the first end and from the second end to the third end of the transformer W is formed at the transformer W to form an alternating current.

JT25X is a push-pull transformer driver specially designed for small-volume low-standby power consumption micropower isolation power supply, and the periphery of the driver can realize 3.3V or 5V input, 3.3V-24V output and 1-3W output power by only matching with a simple input-output filter capacitor, an isolation transformer and a rectifying circuit.

The JT25X chip internally integrates an oscillator, providing a pair of high precision complementary signals to drive the two N-channel MOSFETs. The chip is designed according to a symmetrical structure, so that the high symmetry of the two power MOSFETs can be effectively ensured, and the circuit is prevented from generating magnetic bias in the working process.

JT25X is suitable for a DC-DC isolation type switch power supply integrated controller with a push-pull topological structure, the internal resistance of the built-in power tube is as low as 0.1 omega, and the application of various powers of 2.8V-6V is satisfied. When the current is too large, the clamp limits the current of the power tube, so that the chip can work in a safety area, and peripheral devices can be prevented from being impacted by large current.

The chip has an enabling function, two different working frequencies can be selected through suspending or grounding of the CLK pin, dead time tBBM is designed between two paths of driving, common phenomenon is avoided, drain-source voltage when the power tube is turned on can be reduced, and switching loss is reduced.

The on or off of the chip can be controlled through the EN pin. When EN is pulled to high potential (when suspended, the EN is pulled to high potential by itself), the chip normally operates; and when EN is pulled to be low potential, the chip stops working, so that ultra-low standby power consumption is realized.

The JT25X is integrated with most circuits and devices on one silicon wafer, so that the space utilization rate is greatly improved, and the space waste is greatly reduced. Meanwhile, JT25X integrates a plurality of functions, so that the peripheral structure is very simple, the waste of devices is reduced, and the cost is reduced.

Due to the use of JT25X, the previous 6 separate devices (R1, R2, rb1, rb2, T1, T2 in FIG. 1) are now changed to one integrated chip JT25X, saving PCB space by 50%, and improving product consistency and reliability.

In this embodiment: referring to fig. 2, the anti-static module power supply further includes an anti-static module, the anti-static module includes a protector U1, the type of the protector U1 is JTE8KV, one end of the protector U1 is connected to a supply voltage VIN1, and the other end of the protector U1 is grounded.

JTE8KV is a very small low capacitance TVS ESD ARRAYS protection device. It can trigger and clamp a voltage typical polymer electrostatic discharge device, thereby improving the protection capability of electronic components. The pre-positioned JTE8KV as shown in FIG. 2 can effectively protect the post-stage circuit device from 30KV ESD Voltage (Air/contact) breakdown. And JTE8KV has good temperature resistance and can work at-55to 150 ℃.

In this embodiment: referring to fig. 2, the anti-static module power supply further includes an input filter module, the input filter module includes a capacitor C1, one end of the capacitor C1 is connected to the supply voltage VIN1, and the other end of the capacitor C1 is grounded.

And setting a capacitor C1 to perform filtering treatment, so as to ensure the stability of the power supply voltage VIN 1.

In this embodiment: referring to fig. 2, the anti-static module power supply further includes an output rectifying and filtering module, the output rectifying and filtering module includes a diode D1, a diode D2, a capacitor C2, and a resistor R1, wherein an anode of the diode D1 is connected to a fourth end of the transformer W, an anode of the diode D2 is connected to a sixth end of the transformer W, a cathode of the diode D1 is connected to a cathode of the diode D2, one end of the capacitor C2, one end of the resistor R1, an output voltage VOUT, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, and a fifth end of the transformer W is grounded.

The alternating current output by the transformer W is rectified into direct current by the diodes D1 and D2, the direct current is filtered by the capacitor C2 to become stable direct current, and the output voltage VOUT is supplied to an electric load.

In this embodiment: referring to fig. 2, a plurality of output rectifying and filtering modules are provided.

Only one output rectifying and filtering module shown in fig. 2 is provided, and a plurality of output rectifying and filtering modules can be arranged in actual use.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. An antistatic module power supply, characterized in that: the anti-static module power supply comprises a push-pull type transformer driver U2, wherein the model of the push-pull type transformer driver U2 is JT25X, the VD1 end of the push-pull type transformer driver U2 is connected with the first end of a transformer W, the VIN end of the push-pull type transformer driver U2 is connected with the second end of the transformer W and the power supply voltage VIN1, the VD2 end of the push-pull type transformer driver U2 is connected with the third end of the transformer W, and the GND end of the push-pull type transformer driver U2 is grounded.

2. The anti-static module power supply according to claim 1, further comprising an anti-static module, wherein the anti-static module comprises a protector U1, the type of the protector U1 is JTE8KV, one end of the protector U1 is connected to a supply voltage VIN1, and the other end of the protector U1 is grounded.

3. The anti-static module power supply according to claim 1, further comprising an input filter module, wherein the input filter module comprises a capacitor C1, one end of the capacitor C1 is connected to the supply voltage VIN1, and the other end of the capacitor C1 is grounded.

4. The anti-static module power supply according to claim 1, further comprising an output rectifying and filtering module, wherein the output rectifying and filtering module comprises a diode D1, a diode D2, a capacitor C2 and a resistor R1, the positive electrode of the diode D1 is connected to the fourth end of the transformer W, the positive electrode of the diode D2 is connected to the sixth end of the transformer W, the negative electrode of the diode D1 is connected to the negative electrode of the diode D2, one end of the capacitor C2, one end of the resistor R1 and the output voltage VOUT, the other end of the capacitor C2 is grounded, the other end of the resistor R1 is grounded, and the fifth end of the transformer W is grounded.

5. The antistatic module power supply according to claim 4, wherein the output rectifying and filtering module is provided in plurality.