Low Ripple Step-Up/Step-Down Converter
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Accused Products
Abstract
There is described a device for converting an input signal having a given input voltage (Vbat) value (Vbat) into an output signal having an output voltage (Vout) (Vout) different from the input voltage (Vbat). The device comprises a main module (56), arranged between an input terminal (54) and a first circuit node (N1), The device is adapted to output at the first circuit node (N1) a pulse-width-modulated (PWM) signal switching between a first voltage value and a second voltage value, defining a switching range (SR(i)), by switching successively between a first mode of operation and a second mode of operation. The switching range (SR(i)) of the pulse width modulation (PWM) has an amplitude, calculated as the absolute difference between the first and the second voltage value, inferior or equal to Vout half the input voltage (Vbat).
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Citations
29 Claims
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1-15. -15. (canceled)
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16. A device for converting an input signal having a given input voltage into an output signal having an output voltage different from the input voltage, the device comprising:
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an input terminal adapted to receive the input signal; an output terminal coupled to a first circuit node and adapted to output the output signal converted from the input signal; a main module disposed operatively between the input terminal and the first circuit node, the main module adapted to output, at the first circuit node, a pulse-width-modulated (PWM) signal by operating in at least two modes of operation with a given duty cycle, the PWM signal switching with a switching frequency between at least a first voltage value and at least a second voltage value, the first and second voltage values defining at least one switching range of the PWM signal; wherein the main module, in a first mode of operation is; coupled to the input terminal so as to store power from the input signal; configured to output the first voltage value to the first circuit node; wherein the main module, in a second mode of operation is configured to output the second voltage value different from the first voltage value to the first circuit node by using power stored during the first mode of operation; wherein the switching range of the PWM signal has an amplitude, calculated as a difference between the first and second voltage values, less than or equal to half the input voltage. - View Dependent Claims (17, 18, 19, 20, 22, 23, 24, 25, 26)
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21. The device of 20:
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wherein L is an integer greater than zero and less than or equal to N/2; wherein, in the second mode of operation, the N capacitor modules are arranged in groups of L capacitor modules, the groups being mounted in parallel with each other.
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27. A method for converting an input signal, having an input voltage, into a signal different than the input signal, the method comprising:
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a main module creating a pulse-width-modulated (PWM) signal by outputting a voltage switching between a first voltage value and a second voltage value different than the first voltage value, with a given duty cycle; wherein the first and second voltage values define a switching range; wherein the PWM signal has an amplitude, calculated as a difference between the first and second voltage values, less than or equal to half the input voltage. - View Dependent Claims (28, 29)
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Specification