DE3402342C2 - Preload switching - Google Patents
Preload switchingInfo
- Publication number
- DE3402342C2 DE3402342C2 DE19843402342 DE3402342A DE3402342C2 DE 3402342 C2 DE3402342 C2 DE 3402342C2 DE 19843402342 DE19843402342 DE 19843402342 DE 3402342 A DE3402342 A DE 3402342A DE 3402342 C2 DE3402342 C2 DE 3402342C2
- Authority
- DE
- Germany
- Prior art keywords
- power supply
- output
- preload
- transistor
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Die Erfindung bezieht sich auf ein geregeltes Stromversorgungsgerät. Bei derartigen Geräten ist es aus regelungstechnischen Gründen erforderlich, die sekundäre Ausgangsspannung mit einer Vorlast zu versehen, die in Form eines Vorlastwiderstandes realisiert werden kann. Dadurch wird jedoch der Wirkungsgrad verringert. Zur Verbesserung des Wirkungsgrades sieht die Erfindung vor, daß parallel zum Ausgang des Stromversorgungsgerätes ein Spannungsteiler (R2, R3) angeordnet ist, dessen Abgriff an die Steuerelektrode (S) eines Transistors (Q1) führt, dessen Eingangselektrode (E) mit der einen Ausgangsklemme des Stromversorgungsgerätes über einen Ohmschen Widerstand (R1) und dessen Ausgangselektrode (A) mit der anderen Ausgangsklemme des Stromversorgungsgerätes verbunden ist. Parallel zu den Ein- und Ausgangselektroden (E, A) des Transistors (Q1) ist die Last (RL) angeschaltet.The invention relates to a regulated power supply device. In devices of this type, for control reasons, it is necessary to provide the secondary output voltage with a preload, which can be implemented in the form of a preload resistor. However, this reduces the efficiency. To improve efficiency, the invention provides that a voltage divider (R2, R3) is arranged parallel to the output of the power supply device, the tap of which leads to the control electrode (S) of a transistor (Q1), the input electrode (E) of which with one output terminal of the Power supply device is connected to the other output terminal of the power supply device via an ohmic resistor (R1) and its output electrode (A). The load (RL) is connected in parallel to the input and output electrodes (E, A) of the transistor (Q1).
Description
Eine konkrete Verwirklichung einer derartigen Schal- Mit zunehmendem Ausgangsstrom / 2 wird der Tran-A concrete implementation of such a switch- With increasing output current / 2, the tran-
tung ist jedoch diesem Artikel nicht zu entnehmen. 45 sistor Qi wegen des zunehmenden SpannungsanfallesHowever, this article does not contain any information. 45 sistor Qi because of the increasing voltage build-up
Aus der US-Patentschrift 37 42 338 ist außerdem ein über den Ohmschen Widerstand R 1 zurückgeregelt.
Gleichstromspannungsregler beschrieben, der eine Der Vorlaststrom U nimmt mit zunehmendem Aus-Schaltung
enthält, in welcher die von einer Referenzdi- gangsstrom /2 ab und erreicht bei
ode oder Siliziumzenerdiode erhaltene Spannung mittels eines Emitterfolgers auf die Basis eines Transistors 50 . _ t/2 ~ Übe
zurückgekoppelt ist und der konstante Strom, der durch 2 ~j[\
den Emitterkollektorstromkreis des Transistors fließt,
wirkt wiederum auf die Referenzdiode so ein, daß eine den Wert 0.From US Pat. No. 3,742,338, one is also regulated back via the ohmic resistor R 1. DC voltage regulator described, which contains a The preload current U increases with increasing switching off, in which the of a reference output current / 2 from and reaches at
ode or silicon zener diode is applied to the base of a transistor 50 by means of an emitter follower. _ T / 2 ~ Practice
is fed back and the constant current flowing through 2 ~ j [\
the emitter-collector circuit of the transistor flows,
in turn acts on the reference diode in such a way that one has the value 0.
stabilisierte Ausgangsspannung, wie sie durch die Ze- Um die Basisvorspannung und damit den Temperanerdiode allein nicht erreichbar wäre, erhalten wird. Die 55 turgang des Transistors Ql zu stabilisieren, kann der bekannte Schaltungsanordnung ist jedoch als Serien- Teilwiderstand R 2 des Ohmschen Spannungsteilers regler eingesetzt. durch eine Zenerdiode ersetzt werden.stabilized output voltage, as it would be obtained by the Ze- To the base bias voltage and thus the Temperaner diode alone. The known circuit arrangement can, however, be used as a series partial resistance R 2 of the ohmic voltage divider regulator. be replaced by a zener diode.
Aufgabe der vorliegenden Erfindung ist es, die be- The object of the present invention is to
kannte Vorlastautomatik mit einfachen Mitteln und zu- Hierzu 1 Blatt ZeichnungenKnown preload automatic with simple means and additional 1 sheet of drawings
verlässig zu realisieren. 60 to be implemented reliably. 60
Zur Lösung dieser Aufgabe wird die Vorlastschaltung
gemäß der Erfindung derart ausgebildet, daß ein Spannungsteiler angeordnet ist, dessen Abgriff an die Steuerelektrode
eines Transistors führt, dessen Emitter mit derThe preload circuit is used to solve this problem
designed according to the invention such that a voltage divider is arranged whose tap leads to the control electrode of a transistor whose emitter with the
einen Ausgangsklemme des Stromversorgungsgerätes 65
über einen Ohmschen Widerstand und dessen Kollektor
mit der anderen Ausgangsklemme des Stromversorgungsgerätes verbunden ist, und daß parallel zum Emit-an output terminal of the power supply 65
via an ohmic resistor and its collector
is connected to the other output terminal of the power supply, and that parallel to the emitter
Claims (2)
Abgriff an die Steuerelektrode (S) eines Transistors Anhand der Ausführungsbeispiele wird die Erfindung (Ql) führt, dessen Emitter (E) mit der einen Aus- näher erläutert Es zeigt1. Preload circuit, which is connected in parallel to the output ei- stungsbereich the power supply by the amount of the nes regulated power supply device 5 preload current increased The heat generation is characterized in that a voltage divider (R 2, R 3) is arranged due to the reduced losses at the base load is, its reduced and thus the efficiency increased
Tapping at the control electrode (S) of a transistor The invention (Q1) is based on the exemplary embodiments, the emitter (E) of which is explained in more detail with the one output
noch besser wäre.lower preload resistance simulated than at high, R 1 vo
would be even better.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843402342 DE3402342C2 (en) | 1984-01-24 | 1984-01-24 | Preload switching |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843402342 DE3402342C2 (en) | 1984-01-24 | 1984-01-24 | Preload switching |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3402342A1 DE3402342A1 (en) | 1985-08-01 |
DE3402342C2 true DE3402342C2 (en) | 1986-05-22 |
Family
ID=6225763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19843402342 Expired DE3402342C2 (en) | 1984-01-24 | 1984-01-24 | Preload switching |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3402342C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20021056U1 (en) | 2000-12-12 | 2001-06-28 | Yang, Tai Her, Si-Hu, Dzan Hwa | Output circuit automatically controlled by a secondary circuit with a stored voltage or an opposite electromotive force as a load |
DE102005029110A1 (en) * | 2005-06-23 | 2006-12-28 | Infineon Technologies Ag | Digital circuit unit for e.g. voltage stabilizer, has power consumption unit which drains current additionally, when change in power consumption of circuit block arranged on chip occurs during load change event |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1343251A (en) * | 1971-03-15 | 1974-01-10 | Matsushita Electronics Corp | Dc voltage regulator circuit |
-
1984
- 1984-01-24 DE DE19843402342 patent/DE3402342C2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20021056U1 (en) | 2000-12-12 | 2001-06-28 | Yang, Tai Her, Si-Hu, Dzan Hwa | Output circuit automatically controlled by a secondary circuit with a stored voltage or an opposite electromotive force as a load |
DE102005029110A1 (en) * | 2005-06-23 | 2006-12-28 | Infineon Technologies Ag | Digital circuit unit for e.g. voltage stabilizer, has power consumption unit which drains current additionally, when change in power consumption of circuit block arranged on chip occurs during load change event |
US7603572B2 (en) | 2005-06-23 | 2009-10-13 | Infineon Technologies Ag | Voltage stabilizer stabilizing the voltage of a power line wherein power consumption elements are individually activated based on a quantity of currents to be drained |
Also Published As
Publication number | Publication date |
---|---|
DE3402342A1 (en) | 1985-08-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |