Patent ID: 9711102
Date: 2017-07-18
CPC Classifications: G09G

Claim:
1. A DC-DC converter comprising: a temperature compensating part configured to generate a first ON voltage at a temperature equal to or greater than a predetermined threshold temperature and to generate a second ON voltage at a temperature less than the threshold temperature; and a clock generating part configured to generate a first clock signal and a first clock bar signal based on the first ON voltage and while using a first charge sharing resistor at the temperature equal to or greater than the threshold temperature and to generate a second clock signal and a second clock bar signal based on the second ON voltage and while using a second charge sharing resistor at the temperature less than the threshold temperature, wherein the first clock bar signal has a different timing than that of the first clock signal, and the second clock bar signal has a different timing than that of the second clock signal, wherein a select signal is generated and is determined by a combined resistance of a variable resistor varied according to an ambient temperature, a first resistor which is connected to the variable resistor in series and a second resistor which is connected to the variable resistor in parallel, the select signal being used to pick one or the other of the first and second ON voltages, and wherein the clock generating part comprises: a first generating circuit configured to generate the first clock signal and the second clock signal; a clock terminal connected to the first generating circuit a second generating circuit configured generate to the first clock bar signal and the second clock bar signal; a clock bar terminal connected to a first end of the second generating circuit and a second selecting part configured to connect the first charge sharing resistor and the second charge sharing resistor to a second end of the second generating circuit according to the select signal.