DC/DC boost converter with pulse skipping circuitry
First Claim
1. A DC to DC boost converter circuit for receiving a DC input voltage and converting it to a DC output voltage at a different voltage level than the DC input voltage, comprising:
- a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals;
a switching controller for generating the pulse control signals during a switching cycle; and
wherein the switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter, wherein a pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform.
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Accused Products
Abstract
A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. The switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter. A pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform.
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Citations
8 Claims
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1. A DC to DC boost converter circuit for receiving a DC input voltage and converting it to a DC output voltage at a different voltage level than the DC input voltage, comprising:
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a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals; a switching controller for generating the pulse control signals during a switching cycle; and wherein the switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter, wherein a pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform. - View Dependent Claims (2, 3, 4)
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5. A DC to DC boost converter circuit for receiving a DC input voltage and converting it to a DC output voltage at a different voltage level than the DC input voltage, comprising:
a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals, wherein the switching power converter further comprises; an inductor connected to receive the DC input voltage; a load capacitor connected to a regulated voltage output node; a zero volt turn-on rectifier connected between the inductor and the output voltage node, wherein the zero volt turn-on rectifier further includes a first transistor associated with the first mode of operation and a second transistor associated with the second mode of operation, the first and second transistors selected responsive to control signals provided by the switching controller; a plurality of transistor switches connected in parallel between an input of the zero volt turn-on rectifier and ground, wherein a first transistor switch of the plurality of transistor switches is a associated with the first mode of operation and a second transistor of the plurality of transistor switches is associated with the second mode of operation, the first and second transistor switches selected responsive to the control signals provided by the switching controller; and a switching controller for controlling at least one transistor switch of the plurality of transistor switches responsive to the regulated voltage, wherein the switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter, wherein a pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform. - View Dependent Claims (6, 7)
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8. A DC to DC boost converter circuit for receiving a DC input voltage and converting it to a DC output voltage at a different voltage level than the DC input voltage, comprising:
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a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals; a switching controller for generating the pulse control signals during a switching cycle; and wherein the switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter, wherein a pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform, wherein the pulse skipping circuitry further comprises; a comparator for comparing a voltage control signal associated with the output voltage of the DC to DC boost converter with a control signal associated with the control saw tooth waveform and generating an output signal responsive thereto; an SR latch having a first input connected to receive the output signal from the comparator and a second input connected to receive a reset signal, wherein the SR latch generates the pulse width modulated signal responsive to the voltage control signal and the reset signal; and circuitry for applying the control signal to an input of the comparator, the circuitry further comprises; a transistor connected between the input of the comparator and ground, a gate of the transistor connected to receive the saw tooth waveform; and a current source connected to the input of the comparator; and a capacitor connected between the input of the comparator and ground.
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Specification