Augmented multi-stage boost converter
A technology for boost converters and inductors, which is applied to transformers, output power conversion devices, instruments, etc., and can solve problems such as inability to satisfy the 100 saturation constraint of inductors
Active Publication Date: 2021-10-01
CIRRUS LOGIC INT SEMICON
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Problems solved by technology
Therefore, when the control signal P1 is active, the inductor 100 of the second stage 401b may experience a larger voltage drop, and this may cause Figure 5B shows the large current difference I1-STAGE2–I2-STAGE2
[0021] Therefore, neither the single-stage boost converter 200 nor the two-stage boost converter 400 can satisfy the saturation constraint of the inductor 100 for the desired application
Method used
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[0051] Image 6 An example personal mobile device 1 is shown according to an embodiment of the present disclosure. Image 6 A personal mobile device 1 with a speaker 7 is depicted. Speaker 7 is merely an example, and it should be understood that personal mobility device 1 may be used in conjunction with various transducers, including magnetic coil speakers, piezoelectric speakers, tactile feedback transducers, and the like. Additionally or alternatively, the personal mobile device 1 may be coupled to headphones 3 in the form of a pair of earbud speakers 8A and 8B. Image 6 The headset 3 depicted in is an example only, and it should be understood that the personal mobile device 1 can be used in conjunction with a variety of audio transducers, including but not limited to headphones, earbuds, earphones, and external speakers. The plug 4 may provide the connection of the earphone 3 to the electrical terminals of the personal mobile device 1 . The personal mobile device 1 can p...
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A boost converter may include a first stage comprising a first dual anti-wound inductor constructed such that its windings generate opposing magnetic fields in its magnetic core, and a second stage comprising a second dual anti-wound inductor constructed such that its windings generate opposing magnetic fields in its magnetic core. The boost converter may also include control circuitry for controlling the first stage and the second stage to have a plurality of phases comprising a first phase wherein a first coil of the first dual anti-wound inductor and a second coil of the second dual anti-wound inductor are coupled in parallel between a power supply and a ground voltage and a second phase wherein the first coil of the first dual anti-wound inductor and the second coil of the second dual anti-wound inductor are coupled in series between the power supply and the ground voltage.
Description
technical field [0001] The present disclosure relates generally to circuits for audio devices, piezoelectric devices, haptic feedback devices, and / or other devices, including but not limited to personal audio devices such as wireless phones and media players, and more particularly, to a Enhanced multilevel boost converters that can be used in such devices. Background technique [0002] Personal audio devices including wireless phones (such as mobile / cellular phones, cordless phones), mp3 players and other consumer audio devices are in widespread use. Such personal audio devices may include circuitry for driving a pair of earphones, one or more speakers, piezoelectric transducers, haptic feedback transducers, and / or other transducers. Such circuitry typically includes a driver including a power amplifier for driving the transducer output signal to the transducer. Typically, a power converter may be used to provide a supply voltage to a power amplifier for amplifying signals...
Claims
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IPC IPC(8): H02M3/158
CPCH02M3/1584H01F38/023H01F2038/026H02M1/44H02M1/15H02M1/40H02M1/0064H02M1/007H01F27/28H02M3/1582H02M3/158
Inventor 约翰·L·梅兰森埃里克·J·金杰森·W·劳伦斯
Owner CIRRUS LOGIC INT SEMICON