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US 12,592,629 B2Granted
Power converter
AssigneeNXP B.V.
InventorsJin Hui Lee, Jonghak Moon
Life of this patent
Estimating the term…
Abstract
One example discloses a power converter, including: a power supply input configured to receive electrical power; a controller; an inductance having a first end coupled to the power supply input; a first load channel coupled to a second end of the inductance, and having a first select switch (SEL1) coupled to the controller, and configured to present a first output voltage (Vout1) and a first charge current from the power supply input to a first load; a second load channel coupled to the second end of the inductance, and having a second select switch (SEL2) coupled to the controller, and configured to present a second output voltage (Vout2) and a second charge current from the power supply input to a second load.
Claims20
A power converter, comprising:
- a power supply input configured to receive electrical power;
- a controller;
- an inductance having a first end coupled to the power supply input;
- a first load channel coupled to a second end of the inductance, and having a first select switch (SEL1) coupled to the controller, and configured to present a first output voltage (Vout1) and a first charge current from the power supply input to a first load;
- a second load channel coupled to the second end of the inductance, and having a second select switch (SEL2) coupled to the controller, and configured to present a second output voltage (Vout2) and a second charge current from the power supply input to a second load;
- wherein the controller is configured to set a first on-time (Ton1) for the first channel using the SEL1, and to set a second on-time (Ton2) for the second channel using the SEL2;
- wherein the controller is configured to calculate a first switching frequency for the first channel by counting a number of times the first output voltage (Vout1) switches between above and below a first reference voltage (Vref1);
- and
- wherein the controller is configured to adjust the first on-time (Ton1) based on the first switching frequency;
- further comprising a first comparator (Comp1) coupled to receive the Vout1 and the and the Vref1;
- wherein the first comparator (Comp1) is configured to compare the Vout1 to the Vref1, and output a first logic state if Vout1 is below Vref1 and a second logic state if Vout1 is above Vref1;
- and
- wherein the controller is configured to calculate the first switching frequency by counting a number of times the first comparator (Comp1) switches between the first logic state and the second logic state within a predetermined time period.
10 more elements
A power converter, comprising:
- a power supply input configured to receive electrical power;
- a controller;
- an inductance having a first end coupled to the power supply input;
- a first load channel coupled to a second end of the inductance, and having a first select switch (SEL1) coupled to the controller, and configured to present a first output voltage (Vout1) and a first charge current from the power supply input to a first load;
- a second load channel coupled to the second end of the inductance, and having a second select switch (SEL2) coupled to the controller, and configured to present a second output voltage (Vout2) and a second charge current from the power supply input to a second load;
- wherein the controller is configured to set a first on-time (Ton1) for the first channel using the SEL1, and to set a second on-time (Ton2) for the second channel using the SEL2;
- wherein the controller is configured to calculate a first switching frequency for the first channel by counting a number of times the first output voltage (Vout1) switches between above and below a first reference voltage (Vref1);
- and
- wherein the controller is configured to adjust the first on-time (Ton1) based on the first switching frequency;
- further comprising a valley current sensor coupled between the inductance and the controller, and configured to measure a total current (IL) in the inductance;
- wherein the controller is configured to stop sending charge current to the first load channel and start sending charge current to the second load channel when the total current (IL) through the inductance decreases to a predetermined valley current limit.
8 more elements
A power converter, comprising:
- a power supply input configured to receive electrical power;
- a controller;
- an inductance having a first end coupled to the power supply input;
- a first load channel coupled to a second end of the inductance, and having a first select switch (SEL1) coupled to the controller, and configured to present a first output voltage (Vout1) and a first charge current from the power supply input to a first load;
- a second load channel coupled to the second end of the inductance, and having a second select switch (SEL2) coupled to the controller, and configured to present a second output voltage (Vout2) and a second charge current from the power supply input to a second load;
- wherein the controller is configured to set a first on-time (Ton1) for the first channel using the SEL1, and to set a second on-time (Ton2) for the second channel using the SEL2;
- wherein the controller is configured to calculate a first switching frequency for the first channel by counting a number of times the first output voltage (Vout1) switches between above and below a first reference voltage (Vref1);
- and
- wherein the controller is configured to adjust the first on-time (Ton1) based on the first switching frequency;
- further comprising a valley current sensor coupled between the inductance and the controller, and configured to measure a total current (IL) in the inductance;
- wherein in response to a load transient, the controller is configured to change the predetermined valley current limit from a first limit to a second limit;
- and
- wherein the controller is configured to begin counting the number of times the first output voltage (Vout1) switches between above and below a first reference voltage (Vref1) when the controller changes the first limit to the second limit, and ending after a predetermined time period.
10 more elements
Dependencies are inferred from the claim text.