PD type voltage regulator with overcurrent protection function

A technology of voltage regulator and overcurrent protection, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of high level, overcurrent protection, etc., and improve the quality of automobile power supply and driving safety and reliability Effect

Inactive Publication Date: 2018-10-19
佛山中锦微电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a PD-type voltage regulator with overcurrent protection function to solve the problem of power tube overcurrent protection. Further, it needs to be solved. When the D line is disconnected, the inside of the regulator should have a D line failure protection function. At this time Change the voltage regulation function of the voltage regulator to be directly controlled by the regulator, and set the output voltage of the generator to the default substitute value; when the D line is at a high level for a long time due to line problems or due to hardware and software failures in the internal circuit of the computer board , the adjustment function should also be changed to be directly controlled by the regulator, and the output voltage of the generator should be set to the default substitute value; in this way, the PD voltage regulator with over-current protection function is more complete and reliable, ensuring safe and reliable driving sex

Method used

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  • PD type voltage regulator with overcurrent protection function
  • PD type voltage regulator with overcurrent protection function
  • PD type voltage regulator with overcurrent protection function

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as image 3 As shown, a PD-type voltage regulator with overcurrent protection function is applied to the automotive generator of the vehicle electronic system with PD management function, including the phase output terminal (stator) connected to the generator stator and the voltage regulator phase The current limiting resistor (R02), power tube (Q1) and freewheeling diode (D6) between the output terminals mainly include an overcurrent protection control circuit (101),

[0031] The overcurrent protection control circuit has a ground terminal, a positive terminal, an output terminal, a D signal input terminal and a power tube saturation voltage drop signal input terminal (Ud),

[0032] The ground terminal of the overcurrent protection control circuit is grounded (Gnd), the positive terminal is connected to the positive output terminal of the generator (B+), the output terminal is connected to the input terminal of the power tube, and the D signal input terminal is us...

Embodiment 2

[0035] Such as Figure 4 As shown, a PD-type voltage regulator with over-current protection function, the circuit structure is characterized by including an "over-current protection drive circuit", the "over-current protection drive circuit" mentioned here is composed of a "comparison unit (103 ), delay loop (104), energy storage unit (105), clamping unit (106) "the control circuit that these four basic units constitute, like this, PD adjuster just can be made up of following structure, comprises comparison unit ( 103), buffer (A2), power tube (Q1), delay loop (104), energy storage unit (105), clamp unit (106) and freewheeling diode D6. The noninverting input terminal of the comparison unit is used to receive a reference threshold voltage Vref, the inverting input terminal of the comparison unit is connected to the output terminal of the delay loop, the input terminal of the delay loop is connected to the output terminal of the energy storage unit, and the energy storage unit ...

Embodiment 3

[0043] Such as Figure 5 As shown, a PD-type voltage regulator with an overcurrent protection function as claimed in claim 1, its special feature is that it includes a comparison unit (103), a buffer (A2), a power transistor (Q1), a delay Loop (104), energy storage unit (105), clamping unit (106) and freewheeling diode D6; the noninverting input end of the comparison unit is used to receive a reference threshold voltage Vref, and the inverting input end of the comparison unit is connected to the delay circuit Output terminal, the input terminal of the delay circuit is connected to the output terminal of the energy storage unit, the energy storage unit is also connected to the ground (Gnd) and the output terminal of the overcurrent protection control circuit as mentioned above, and the output terminal of the overcurrent protection control circuit is connected to the input of the power tube The ground terminal of the power tube is grounded, the output terminal of the power tube ...

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Abstract

The invention provides a PD type voltage regulator with the overcurrent protection function which is applied to an automobile power generator of a vehicle electronic system with A PD management function. The voltage regulator comprises a current limiting resistor (R02) connected to the position between a power generator stator phase output end (stator) and a regulator phase output end, a power tube (Q1) and a free-wheel diode D6, the voltage regulator is characterized by further comprising an overcurrent protection control circuit (101), the grounding end of the overcurrent protection controlcircuit is connected with the ground, the positive electrode is connected with a positive electrode output end (B+) of the power generator, the output end is connected with the input end of the powertube, and D signal input end is used for receiving a D signal of the voltage regulator from an engine electronic control unit (ECU), and a saturation voltage drop signal input end (Ud) of the power tube is connected with the power tube output end; when overcurrent happens on the power tube, the saturated voltage drop of the power tube is transmitted to the overcurrent protection control circuit, the power tube is identified to be at the overcurrent state by the overcurrent protection control circuit, and meanwhile, a low level signal is output to protect the power tube.

Description

technical field [0001] The invention belongs to the technical field of automobile generator control, and relates to a PD type voltage regulator with an overcurrent protection function. Background technique [0002] PD type voltage regulator, used in automotive generators with PD management function vehicle electronic systems, such as figure 1 As shown, this type of "voltage regulator" (1001) has a current limiting resistor (R02) connected between the generator stator phase output terminal (stator) and the voltage regulator phase output terminal, power tube Q01, and power tube Q01 input Terminal current limiting resistor R01, freewheeling diode D01, the power tube receives the generator voltage regulation control pulse from the vehicle engine electronic control unit (ECU, commonly known as computer board) from the D port of the PD voltage regulator through the current limiting resistor. The adjustment method is essentially to integrate the generator output voltage detection ...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor杨明翟锁森杨超杨利
Owner佛山中锦微电科技有限公司