Arrangement having a switched-mode power supply and a microprocessor
First Claim
1. Arrangement comprising a microprocessor and a switched-mode power supply having a normal mode and a low-power burst mode, said switched-mode power supply comprisinga transformer with a primary winding and a secondary winding providing a secondary side output voltage, a switching transistor coupled to said primary winding, a primary side driver stage coupled to said switching transistor for driving said switching transistor, a control loop being coupled to said secondary side output voltage, for providing a control signal to said driver stage for a regulation of said output voltage, and an output of said microprocessor being coupled to said control loop, for initiating said burst mode and controlling the duty cycle of said burst mode via a control signal of said microprocessor.
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Accused Products
Abstract
A switched-mode power supply with a control loop and a microprocessor has a normal mode and a low-power mode with a burst mode. The microprocessor is connected via an output to the control loop and uses this to control the burst mode of the switched-mode power supply directly. The control loop of the switched-mode power supply monitors, in particular, a secondary output voltage, so that the output of the microprocessor is connected to the control loop, for example via a simple resistor network or a transistor stage. The clock frequency and the duty cycle of the burst mode are permanently stored in the microprocessor and can be defined for the switched-mode power supply directly, for example using TTL logic.
86 Citations
8 Claims
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1. Arrangement comprising a microprocessor and a switched-mode power supply having a normal mode and a low-power burst mode, said switched-mode power supply comprising
a transformer with a primary winding and a secondary winding providing a secondary side output voltage, a switching transistor coupled to said primary winding, a primary side driver stage coupled to said switching transistor for driving said switching transistor, a control loop being coupled to said secondary side output voltage, for providing a control signal to said driver stage for a regulation of said output voltage, and an output of said microprocessor being coupled to said control loop, for initiating said burst mode and controlling the duty cycle of said burst mode via a control signal of said microprocessor.
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7. Arrangement comprising a microprocessor and a switched-mode power supply having a normal mode and a low-power burst mode, said switched-mode power supply comprising
a transformer with a primary winding and a secondary winding providing an output voltage, a switching transistor coupled to said primary winding, a driver stage coupled to said switching transistor for driving said switching transistor, a control loop being coupled to said output voltage, for providing a control signal to said driver stage for a regulation of said output voltage, and an output of said microprocessor being coupled to said control loop, for initiating said burst mode the duty cycle and the clock frequency of said burst mode via “ - high” and
“
low”
signals of said microprocessor.
- high” and
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8. Arrangement comprising a microprocessor and a switched-mode power supply having a normal mode and a low-power burst mode, said switched-mode power supply comprising
a transformer with a primary winding and a secondary winding providing an output voltage, a switching transistor coupled to said primary winding, a driver stage coupled to said switching transistor for driving said switching transistor, a control loop being coupled to said output voltage, for providing a control signal to said driver stage for a regulation of said output voltage, and an output of said microprocessor being coupled to said control loop, for initiating said burst mode and controlling the on-and off-phases of said burst mode via “ - high” and
“
low”
signals of said microprocessor.
- high” and
Specification
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- Resources
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Current AssigneeDeutsche Thomson-Brandt Gmbh (Vantiva SA)
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Original AssigneeThomson Licensing (Vantiva SA)
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InventorsRehm, Markus, Rodriquez-Duran, Jose Ignacio, Chan, Choon Meng, Zee, Kum Yoong, Riesle, Thomas
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Primary Examiner(s)Vu, Bao Q.
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Assistant Examiner(s)Laxton, Gary L.
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Application NumberUS09/327,064Time in Patent Office1,163 DaysField of Search363/21, 363/95, 363/97, 363/131, 363/16, 363/49, 363/21.04, 363/21.07, 363/21.08, 363/21.12, 363/21.15, 363/21.16, 363/80, 323/902, 315/411US Class Current363/97CPC Class CodesH02M 1/0032 Control circuits allowing l...H02M 3/33515 with digital controlH04N 5/63 Generation or supply of pow...Y02B 70/10 Technologies improving the ...
