Boost converter
A DC-DC converter controller includes a transistor driver, a flip-flop, a comparator, an integrator circuit, a switch, and a pulse generator circuit. The flip-flop includes an output coupled to an input of the transistor driver. The comparator includes an output coupled an input of the flip-flop. The integrator circuit includes an output coupled to an input of the comparator. The switch includes a first terminal coupled to the output of the integrator circuit, and a second terminal coupled to ground. The pulse generator circuit includes an input coupled to an output of the transistor driver, and an output coupled to a third terminal of the switch.
1. A DC-DC converter controller, comprising:
a transistor driver;
a flip-flop comprising an output coupled to an input of the transistor driver;
a comparator comprising an output coupled an input of the flip-flop;
an integrator circuit comprising an output coupled to an input of the comparator;
a switch comprising:
a first terminal coupled to the output of the integrator circuit; and
a second terminal coupled to ground; and
a pulse generator circuit comprising:
an input coupled to an output of the transistor driver; and
an output coupled to a third terminal of the switch.
2. The DC-DC converter controller of claim 1 , wherein:
the comparator is a first comparator;
the input of the flip-flop is a first input; and
the DC-DC converter controller further comprises a second comparator comprising an output coupled to a second input of the flip-flop.
3. The DC-DC converter controller of claim 2 , further comprising an amplifier comprising:
an output coupled to an input of the second comparator; and
an input coupled to an input of the integrator circuit.
4. The DC-DC converter controller of claim 3 , wherein:
the input of the amplifier is a first input; and
the DC-DC converter controller further comprises a sample and hold circuit comprising:
a first input coupled to the output of the integrator circuit;
a second input coupled to the output of the transistor driver; and
an output coupled to a second input of the amplifier.
5. The DC-DC converter controller of claim 4 , wherein:
the input of the second comparator is a first input; and
the sample and hold circuit further comprises:
a first switch comprising a first terminal coupled to a second input of the second comparator;
a second switch comprising:
a first terminal coupled to a second terminal of the first switch of the sample and hold circuit;
a second terminal coupled to the second input of the amplifier;
a first capacitor coupled to the first terminal of the second switch; and
a second capacitor coupled to the second terminal of the second switch.
6. The DC-DC converter controller of claim 1 , further comprising a transistor comprising:
a first terminal coupled to the output of the transistor driver; and
a second terminal coupled to an input of the integrator circuit.
7. The DC-DC converter controller of claim 1 , wherein:
the input of the comparator is a first input; and
the DC-DC converter controller further comprises an amplifier comprising:
an input coupled to an input of the integrator circuit; and
an output coupled to a second input of the comparator.
8. A DC-DC converter controller, comprising:
a transistor driver;
a flip-flop comprising an output coupled to an input of the transistor driver;
a comparator comprising an output coupled an input of the flip-flop;
an amplifier comprising an output coupled to a first input of the comparator; and
a sample and hold circuit comprising:
a first input coupled to a second input of the comparator;
a second input coupled to an output of the transistor driver; and
an output coupled to an input of the amplifier.
9. The DC-DC converter controller of claim 8 , wherein the sample and hold circuit further comprises:
a first switch comprising a first terminal coupled to the second input of the comparator;
a second switch comprising:
a first terminal coupled to a second terminal of the first switch;
a second terminal coupled to the input of the amplifier;
a first capacitor coupled to the first terminal of the second switch; and
a second capacitor coupled to the second terminal of the second switch.
10. The DC-DC converter controller of claim 8 , wherein:
the comparator is a first comparator;
the amplifier is a first amplifier;
the input of the flip-flop is a first input; and
the DC-DC converter controller further comprises a second comparator comprising an output coupled to a second input of the flip-flop.
11. The DC-DC converter controller of claim 10 , wherein:
the amplifier is a first amplifier; and
the DC-DC converter controller further comprises a second amplifier comprising an output coupled to an input of the second comparator.
12. The DC-DC converter controller of claim 8 , further comprising an integrator circuit comprising an output coupled to an input of the comparator.
13. The DC-DC converter controller of claim 12 , further comprising a transistor comprising:
a first terminal coupled to the output of the transistor driver; and
a second terminal coupled to an input of the integrator circuit.
14. The DC-DC converter controller of claim 12 , further comprising:
a switch comprising:
a first terminal coupled to the output of the integrator circuit; and
a second terminal coupled to ground; and
a pulse generator circuit comprising:
an input coupled to the output of the transistor driver; and
an output coupled to a third terminal of the switch.
15. A DC-DC converter, comprising:
an inductor;
a transistor comprising a first terminal coupled to the inductor;
a transistor driver comprising an output coupled to a second terminal of the transistor;
a flip-flop comprising an output coupled to an input of the transistor driver;
a comparator comprising an output coupled an input of the flip-flop;
an integrator circuit comprising an output coupled to an input of the comparator;
a switch comprising:
a first terminal coupled to the output of the integrator circuit; and
a second terminal coupled to ground; and
a pulse generator circuit comprising:
an input coupled to the output of the transistor driver; and
an output coupled to a third terminal of the switch.
16. The DC-DC converter of claim 15 , wherein:
the input of the comparator is a first input; and
the DC-DC converter further comprises an amplifier comprising:
an input coupled to an input of the integrator circuit; and
an output coupled to a second input of the comparator.
17. The DC-DC converter of claim 15 , wherein:
the comparator is a first comparator;
the input of the flip-flop is a first input; and
the DC-DC converter further comprises a second comparator comprising an output coupled to a second input of the flip-flop.
18. The DC-DC converter of claim 17 , further comprising an amplifier comprising:
an output coupled to an input of the second comparator; and
an input coupled to an input of the integrator circuit.
19. The DC-DC converter of claim 18 , wherein:
the input of the amplifier is a first input; and
the DC-DC converter further comprises a sample and hold circuit comprising:
a first input coupled to the output of the integrator circuit;
a second input coupled to the output of the transistor driver; and
an output coupled to a second input of the amplifier.
20. The DC-DC converter of claim 19 , wherein:
the input of the second comparator is a first input;
the sample and hold circuit further comprises:
a first switch comprising a first terminal coupled to a second input of the second comparator;
a second switch comprising:
a first terminal coupled to a second terminal of the first switch of the sample and hold circuit;
a second terminal coupled to the second input of the amplifier;
a first capacitor coupled to the first terminal of the second switch; and
a second capacitor coupled to the second terminal of the second switch.