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1. WO2015144355 - DEVICE AND METHOD FOR REDUCING SWITCHING LOSSES IN POWER TRANSISTORS

Publication Number WO/2015/144355
Publication Date 01.10.2015
International Application No. PCT/EP2015/053083
International Filing Date 13.02.2015
IPC
H03K 17/16 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
16Modifications for eliminating interference voltages or currents
H02M 1/08 2006.1
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H03K 17/13 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
13Modifications for switching at zero crossing
CPC
H02M 1/0054
H02M 1/088
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
088for the simultaneous control of series or parallel connected semiconductor devices
H02M 3/158
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
3Conversion of dc power input into dc power output
02without intermediate conversion into ac
04by static converters
10using discharge tubes with control electrode or semiconductor devices with control electrode
145using devices of a triode or transistor type requiring continuous application of a control signal
155using semiconductor devices only
156with automatic control of output voltage or current, e.g. switching regulators
158including plural semiconductor devices as final control devices for a single load
H03K 17/133
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
13Modifications for switching at zero crossing
133in field-effect transistor switches
H03K 17/166
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
16Modifications for eliminating interference voltages or currents
161in field-effect transistor switches
165by feedback from the output circuit to the control circuit
166Soft switching
H03K 2217/0036
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
2217Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
0036Means reducing energy consumption
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • FUNK, Tobias
  • WITTMANN, Juergen
  • WICHT, Bernhard
Priority Data
10 2014 205 844.928.03.2014DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) VORRICHTUNG UND VERFAHREN ZUR REDUZIERUNG VON SCHALTVERLUSTEN IN LEISTUNGSTRANSISTOREN
(EN) DEVICE AND METHOD FOR REDUCING SWITCHING LOSSES IN POWER TRANSISTORS
(FR) DISPOSITIF ET PROCÉDÉ DE RÉDUCTION DE PERTES DE COMMUTATION DANS DES TRANSISTORS DE PUISSANCE
Abstract
(DE) Vorrichtung (30) mit einem ersten Leistungstransistor (31), wobei ein Drainanschluss des ersten Leistungstransistors mit einer Versorgungsspannung (33) und ein Sourceanschluss des ersten Leistungstransistors (31) mit einem ersten Spannungspotential (34) verbunden ist und einem zweiten Leistungstransistors (32), wobei ein Drainanschluss des zweiten Leistungstransistors (31) mit dem Drainanschluss des ersten Leistungstransistors (31) und ein Sourceanschluss des zweiten Leistungstransistors (32) mit einem zweiten Spannungspotential (35) verbunden ist, wobei das erste Spannungspotential (34) mit einer ersten Überwachungseinrichtung (39) und das zweite Spannungspotential (35) mit einer zweiten Überwachungseinrichtung (40) verbunden ist, wobei die erste Überwachungseinrichtung (39) das erste Spannungspotential (34) und die zweite Überwachungseinrichtung (40) das zweite Spannungspotential (35) erfasst, wobei die Überwachungseinrichtungen (39, 40) das erste Spannungspotential (34) und das zweite Spannungspotential (35) mit dem Wert der Versorgungsspannung vergleichen und in Abhängigkeit der Vergleiche eine Steuereinheit (42) ansteuern, wobei die Steuereinheit (42) einen Schaltzeitpunkt des zweiten Leistungstransistors (32) bestimmt und ein Mittel (43) vorhanden ist, das beim Einschalten des zweiten Leistungstransistors (32) einen Strom erzeugt, wobei der Strom das erste Spannungspotential (34) verändert und die Steuereinheit (42) den ersten Leistungstransistor (31) ansteuert, wenn das erste Spannungspotential (34) den gleichen Wert aufweist wie die Versorgungsspannung (33), sodass der erste Leistungstransistor spannungslos schaltet.
(EN) The invention relates to a device (30) with a first power transistor (31). A drain connection of the first power transistor is connected to a supply voltage (33), and a source connection of the first power transistor (31) is connected to a first voltage potential (34) and a second power transistor (32). A drain connection of the second power transistor (31) is connected to the drain connection of the first power transistor (31), and a source connection of the second power transistor (32) is connected to a second voltage potential (35). The first voltage potential (34) is connected to a first monitoring device (39), and the second voltage potential (35) is connected to a second monitoring device (40), the first monitoring device (39) detecting the first voltage potential (34) and the second monitoring device (40) detecting the second voltage potential (35), wherein the monitoring devices (39, 40) compare the first voltage potential (34) and the second voltage potential (35) with the value of the supply voltage and actuate a control unit (42) depending on the comparison. The control unit (42) determines a switching time of the second power transistor (32), and means (43) are provided which generate a current when the second power transistor (32) is activated. The current changes the first voltage potential (34), and the control unit (42) actuates the first power transistor (31) when the first voltage potential (34) has the same value as the supply voltage (33) so that the first power transistor is switched without a voltage.
(FR) L'invention concerne un dispositif (30) comporte un premier transistor de puissance (31), une borne de drain du premier transistor de puissance étant reliée à une tension d'alimentation (33) et une borne de source du premier transistor de puissance (31) étant reliée à un premier potentiel de tension (34) et à un second transistor de puissance (32), une borne de drain du second transistor de puissance (31) étant reliée à la borne de drain du premier transistor de puissance (31) et une borne de source du second transistor de puissance (32) étant reliée à un second potentiel de tension (35), le premier potentiel de tension (34) étant relié à un premier moyen de surveillance (39) et le second potentiel de tension (35) étant relié à un second moyen de surveillance (40), le premier dispositif de surveillance (39) détectant le premier potentiel de tension (34) et le second moyen de surveillance (40) détectant le second potentiel de tension (35), les moyens de surveillance (39, 40) comparant le premier potentiel de tension (34) et le second potentiel de tension (35) avec la valeur de la tension d'alimentation et commandant une unité de commande (42) en fonction des comparaisons, l'unité de commande (42) déterminant un instant de commutation du second transistor de puissance (32) et un moyen (43) étant prévu pour générer un courant lors de la commutation du second transistor de puissance (32), le courant modifiant le premier potentiel de tension (34) et l'unité de commande (42) commandant le premier transistor de puissance (31) lorsque le premier potentiel de tension (34) a la même valeur que la tension d'alimentation (33) de sorte que le premier transistor de puissance commute sans tension.
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