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US 11,808,792 B2Granted
Multi-level voltage detector
AssigneeTexas Instruments Incorporated
InventorKeliu Shu
Life of this patent
Estimating the term…
Abstract
A voltage detector comprises an input, a resistor divider circuit having resistors coupled in series with one another between the input and a reference node, and N intermediate nodes joining adjacent pairs of the resistors. The voltage detector has N switches coupled to the respective intermediate nodes, as well as a comparator with an input coupled to the switches, a state machine having an input coupled to the output of the comparator, and a decoder having N decoder outputs coupled to respective control terminals of the N switches.
Claims15
A circuit, comprising:
- a resistor divider circuit coupled between an input terminal and a ground terminal, the resistor divider circuit having divider outputs;
- a switch circuit having a switch circuit output, switch circuit inputs, and switch control terminals, the switch circuit inputs coupled to the divider outputs;
- a comparator having a first input coupled to a voltage reference, a second input coupled to the switch circuit output, and a comparator output;
- and
- a control circuit having a control input, switch control outputs, and a current control output, the control input coupled to the comparator output, the switch control outputs coupled to the switch control terminals, and the control circuit configured to, responsive to a state of the comparator output:
- set respective states of the switch control output;
- and
- provide a control signal representing a power converter reference current at the current control output responsive to a state of the comparator output.
5 more elements
A circuit, comprising:
- a power converter having a power input, a power output, and a power converter control input;
- a power converter control circuit having a voltage control input, a current control input, a power converter control output, the voltage control input coupled to the power output, and the power converter control output coupled to the power converter control input, the power converter control circuit configured to set a reference current of the power converter responsive to the current control input;
- and
- a current control circuit having a control input and a current control output, the control input coupled to the power output, and the current control circuit including:
- a resistor divider circuit coupled between the control input and a ground terminal, the resistor divider circuit having divider outputs;
- a switch circuit having a switch circuit output, switch circuit inputs, and switch control terminals, the switch circuit inputs coupled to the divider outputs;
- a comparator having a first input coupled to a voltage reference, a second input coupled to the switch circuit output, and a comparator output;
- and
- a controller circuit having a controller input, switch control outputs, and the current control output, the switch control outputs coupled to the switch control terminals, the controller input coupled to the comparator output, and the control circuit configured to set respective states of the switch control output and the current control output responsive to a state of the comparator output.
6 more elements
Dependencies are inferred from the claim text.