ES2223280A1 - System for handling high side driver part of device in e.g. semi bridge, of electronic circuit of commutation, has control circuit connected with high side driver by condenser - Google Patents

Abstract

The system has a control circuit (1) connected with a high side driver (HSD) (2) by a condenser (3).

Description

Upper part management system (HSD) of a semipuente device or bridge for an electronic circuit of commutation.

Object of the invention

The following invention, as expressed in the set forth herein, refers to a upper part management system (HSD) of a device semi-bridge or bridge for an electronic switching circuit, being of the type of electronic circuits called HSD (High Side Driver) of application in the handling of semipuente devices or high voltage switching bridge, in which a coupling means between the control circuit and the HSD, so that the coupling between the control circuit and the HSD circuit can be Perform by different means.

In the present invention a means of coupling by condenser, by which it is allowed to handle rail voltages (HVR, High Voltage Rail) of several thousand volts (even more than 10,000), allowing, in turn, to have a Perfect control of the electronic switch or electronic switch, regardless of the type of this one.

Scope

This system describes a system of handling of the upper part (HSD) of a semi-bridge or bridge device for an electronic switching circuit, which is of application in the handling of semipuente or bridge devices Full high voltage switching used in sources switching power supply, electronic ballasts, motor control, UPS's, etc.

Background of the invention

The current HSD circuits                                                          (High Side Driver - Driver of the high part) are wide and general application in the handling of configurations or devices semi-bridges or full bridges of high voltage switching, presenting a coupling means between the control circuit and the HSD circuit, in which, without exception, these means of Coupling are direct, optical or magnetic type.

We can briefly indicate that the coupling Direct materializes by means of high signal transistors differential mounting voltage. HSD direct coupling circuits they have the problem of not being able to handle rail voltages beyond 600 V ..

The optical coupling means is materialized by  optoelectronic devices (photodiodes + phototransistors), with galvanic isolation.

The magnetic coupling medium materializes by means of a transformer, generally, toroidal, with insulation galvanic, being able to present a variable number of windings. He magnetic coupling means does not allow efficient handling of the switch or electronic switch, regardless of its type (MOSFET, BIPOLAR, IGBT, etc.).

Description of the invention

This system describes a system of handling of the upper part (HSD) of a semi-bridge or bridge device for an electronic switching circuit, being of the type of electronic circuits called HSD (High Side Driver) of application in the management of semi-bridge or high bridge devices switching voltage, in which there is a coupling between the control circuit and the HSD, so that the coupling means between the control circuit and the HSD is defined by a condenser.

Thus, the HSD (High Side Driver) circuit is behaves like an investor, so when the output \ overline {HSD} of the control circuit goes high, through of the capacitor, the HSD circuit causes its output to level logic low while when the HSD output of the circuit control goes low, through the capacitor, the HSD circuit It causes your output to go to high logic level.

To complement the description below is going to be done, and in order to help a better understanding of The characteristics of the invention are accompanied by the present descriptive memory, of a set of planes, in whose figures of illustrative and non-limiting, the details are represented characteristic of the invention.

Brief description of the designs

Figure 1. Shows a configuration or device  semipuente in which the swich or upper switch is operated through the HSD circuit, being able to observe how the coupling between the control circuit and the HSD circuit is defined by a condenser.

Figure 2. Shows a practical embodiment of a HSD circuit, relative to a semipuente configuration, being defined the coupling between the control circuit and the HSD circuit by a condenser.

Description of a preferred embodiment

In view of the commented figures and agree with the numbering adopted we can observe how the present invention is based on materializing the coupling between the circuit of control 1 and the HSD 2 circuit (High Side Driver - Driver high part), by means of a capacitor 3, being able to observe in the Figure 1 of the designs, as the upper switch 4 is handled by the HSD 2 circuit. Thus, all devices or configurations semipuente or bridge incorporate a control circuit 1 that generates the two necessary control signals \ overline {HSD} (High Side Driver - Driver of the high part) and LSD               (Low Side Driver - Part Handler lower).

In this way, the coupling between the circuit of control 1 and the HSD circuit 2 is defined by a capacitor 3 in negative logic (inversion), that is, the output \ overline {HSD} of control circuit 1 goes to low logic level (zero volts) causing the output 5 of the HSD 2 circuit to go to the logical level high (+ Vc Volts over the electronic switch source); Yet the inverse, when the output \ overline {HSD} of the control circuit 1 goes to high level (+ Vc Volts), through the capacitor 3, the HSD 2 circuit causes its output 5 to go low logic level (zero volts above the source of switch 6, that is, the HSD 2 circuit It behaves like an investor.

On the other hand, diode 7 functions as BOOTSTRAP in the supply of the HSD 2 circuit.

In figure 2 of the designs a practical execution of an HSD circuit, so that when the circuit output HSD 2 goes to ground voltage 8 (zero volts), the point 5 goes to voltage of + Vc over point 6, causing the closure of switch 4.

Also, the circuit power is using a classic BOOTSTRAP 7 with a diode.

When the output of control circuit 1 goes to voltage + Vc on ground 8, output 5 goes to zero voltage of point 6 causing the switch 4 to open.

The circuit related to figure 2 of the designs It is designed to operate up to 1,000 HVR rail tension V. DC., Being able to design to operate at 10,000 V or more.

Claims (1)

1. High part management system (HSD) of a semi-bridge or bridge device for an electronic switching circuit, being of the type of electronic circuits called HSD (High Side Driver) applicable in the management of semi-bridge or high bridge devices switching voltage, in which there is an coupling between the control circuit and the HSD, characterized in that the coupling means between the control circuit (1) and the HSD circuit (2) is defined by a capacitor (3).