US 12,449,167 B2
Controller and control method of thermoelectric cooler-heater device
Lei Tan, Beijing (CN)
Assigned to SG MICRO CORP, Beijing (CN)
Appl. No. 18/044,229
Filed by SG MICRO CORP, Beijing (CN)
PCT Filed Aug. 18, 2021, PCT No. PCT/CN2021/113309
§ 371(c)(1), (2) Date Mar. 7, 2023,
PCT Pub. No. WO2022/048445, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 202010929394.4 (CN), filed on Sep. 7, 2020.
Prior Publication US 2023/0324090 A1, Oct. 12, 2023
Int. Cl. F25B 21/04 (2006.01)
CPC F25B 21/04 (2013.01) [F25B 2321/021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A controller of a thermoelectric cooler-heater device, wherein the controller comprises:
a driving terminal, coupled to the thermoelectric cooler-heater device;
a switching power supply, coupled to the thermoelectric cooler-heater device to provide a first driving current; and
a constant-current constant-voltage power supply, coupled to the thermoelectric cooler-heater device to provide a second driving current,
wherein, according to a temperature detection signal, one of the switching power supply and the constant-current constant-voltage power supply is configured to operate, the first driving current is a continuous driving current and flows from an anode end to a cathode end of the thermoelectric cooler-heater device, and the second driving current is a pulse driving current and flows from the cathode end to the anode end of the thermoelectric cooler-heater device,
wherein the constant-current constant-voltage power supply comprises a regulating transistor, the switching power supply comprises a first switching transistor and a second switching transistor configured to be turned on alternately when the switching power supply operates, the regulating transistor and one of the first switching transistor and the second switching transistor are connected together to the driving terminal, and when the regulating transistor provides the second driving current, both the first switching transistor and the second switching transistor are turned off.