{"product_id":"kuaiqu-kq7901-precision-electronics-r-amp-d-power-supply-programmable-dc-power-supply-with-usb-rs232-rs485-control","title":"KUAIQU KQ7901 0-80V 0-20A 400W Precision Electronics R\u0026D Power Supply, Programmable DC Power Supply with USB RS232 RS485 Control","description":"\u003cdiv style=\"margin: 20px 0; padding: 15px; border-left: 4px solid #2c3e50; background-color: #f8f9fa; border-radius: 4px;\"\u003e\n\u003ch2 style=\"margin: 0 0 10px 0; font-size: 20px; color: #2c3e50;\"\u003e\u003ca style=\"color: #2980b9; text-decoration: underline; font-weight: bold; display: inline-flex; align-items: center;\" rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0705\/8027\/3329\/files\/KQ7901-_-20260514-1-23.pdf?v=1784628426\" target=\"_blank\"\u003e \u003csvg style=\"margin-right: 8px;\" viewbox=\"0 0 16 16\" fill=\"currentColor\" height=\"20\" width=\"20\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n        \u003cpath d=\"M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z\"\u003e\u003c\/path\u003e\n        \u003cpath d=\"M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z\"\u003e\u003c\/path\u003e\n      \u003c\/svg\u003e Download English Manual (PDF) \u003c\/a\u003e\u003c\/h2\u003e\n\u003cp style=\"margin: 0; color: #666; font-size: 14px;\"\u003eClick the link above to get the full user guide for this product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eKUAIQU KQ7901 0-80V 0-20A 400W  Precision Electronics R\u0026amp;D Power Supply, Programmable DC Power Supply with USB RS232 RS485 Control\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eDescription\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe KUAIQU KQ7901 Precision Electronics R\u0026amp;D Power Supply is designed for precision circuit development, electronic module validation, and automated functional testing. Featuring a 4.3-inch TFT color display, five-digit voltage and current readouts, real-time power monitoring, and encoder and numeric keypad control, this programmable DC power supply delivers intuitive operation and precise parameter adjustment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith 100 groups of data storage, programmable List testing, USB file import, USB\/RS232\/RS485 computer control, and remote Sense compensation, the KQ7901 is an advanced regulated DC power supply for engineers who require repeatable test conditions and efficient laboratory workflows. Additional features include battery reverse-polarity protection, OCP and OVP protection, adjustable screen brightness, bilingual interface support, and dual USB fast-charging outputs.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003e1. Five-Digit Display for Precision Electronics Development\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDesigned as a precision electronics R\u0026amp;D power supply, the KQ7901 features five-digit voltage and current displays alongside real-time power monitoring. Engineers can adjust output parameters using the rotary encoder or numeric keypad, making this programmable DC power supply suitable for detailed circuit characterization, electronic component evaluation, and repeatable engineering tests.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e2. 4.3-Inch TFT Color Display with Bilingual Interface\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe 4.3-inch TFT color screen provides a clear, intuitive interface for laboratory power supply operation. Adjustable screen brightness helps accommodate different working environments, while Chinese and English interface switching makes the instrument convenient for international engineering teams, electronics laboratories, and production test stations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e3. Real-Time Voltage, Current, and Power Curve Display\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe built-in curve interface can display two of the following parameters simultaneously: voltage, current, and power. This visual monitoring capability helps engineers observe output behavior during electronic module testing, power circuit development, and programmable DC power supply experiments.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e4. 100 Groups of Programmable Parameter Storage\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eStore and recall up to 100 groups of test parameters, including voltage, current, overcurrent protection (OCP), and overvoltage protection (OVP) settings. This programmable bench power supply helps engineers reduce repetitive setup work, maintain consistent test conditions, and improve efficiency across recurring electronics R\u0026amp;D and quality inspection tasks.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e5. Programmable List Testing with USB File Import\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe KQ7901 supports programmable List testing through both local instrument programming and USB drive file import. Engineers can prepare and execute predefined output sequences for repeatable electronic testing workflows, making this programmable DC power supply suitable for automated test benches, electronic module verification, and engineering development.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e6. USB, RS232, and RS485 Remote Computer Control\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWith USB, RS232, and RS485 programmable interfaces, the KQ7901 can connect to a computer for remote control and integration into electronic test systems. Remote Sense compensation helps reduce the effect of lead voltage drop at the load, improving voltage regulation at the point of connection when correctly wired.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThese capabilities make the KQ7901 a practical computer-controlled DC power supply for laboratory automation, production testing, and repeatable engineering experiments.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e7. Battery Reverse-Polarity Protection\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBuilt-in battery reverse-polarity protection helps protect the instrument when a battery is connected with incorrect polarity. The power supply automatically triggers a reverse-polarity protection prompt, helping engineers identify connection errors during battery electronics testing and circuit development.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e8. Dual USB and Type-C Fast-Charging Outputs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIn addition to its adjustable DC output, the KQ7901 provides USB-A and USB-C fast-charging ports with real-time output monitoring. These auxiliary outputs offer convenient power options for compatible electronic devices, development accessories, and USB-powered modules alongside the main programmable DC power supply.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e9. Forced Constant-Voltage (CV) Mode\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe forced CV mode is designed to keep the instrument operating in constant-voltage mode according to its specified operating conditions. This is useful for applications that prioritize voltage regulation during electronic circuit development and functional verification. Actual output behavior remains subject to the instrument's rated limits and protection mechanisms.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e10. OCP, OVP, and Panel Lock Protection\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOvercurrent protection (OCP) and overvoltage protection (OVP) provide additional safeguards during electronics R\u0026amp;D and automated testing. The panel lock function helps prevent unintended setting changes during experiments, repetitive testing, and operation on shared laboratory workbenches.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eElectronics R\u0026amp;D and Prototype Validation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUse the KQ7901 precision DC power supply to power prototype circuit boards, embedded electronics, control modules, and electronic components during development and functional verification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAutomated Electronic Functional Testing\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIntegrate the programmable DC power supply into computer-controlled test benches for repeatable output sequences, predefined test conditions, and electronic module validation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePower Electronics and DC-DC Converter Development\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSupport the development and functional evaluation of voltage regulation circuits, DC-DC converter modules, power management circuits, and low-voltage electronic systems. Additional measurement equipment may be required for comprehensive efficiency and dynamic-load testing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBattery Management System (BMS) and Battery Electronics Testing\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePower battery protection boards, BMS circuits, charging-control electronics, and related low-voltage modules during development. Confirm the required voltage, current, and test conditions before connecting battery cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eElectronic Manufacturing and Quality Inspection\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUse stored parameter groups and programmable List testing to help standardize recurring inspection procedures for electronic assemblies and modules.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eUniversity Engineering Laboratories\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSupport electronics experiments, circuit analysis, and engineering research with five-digit readings, graphical output monitoring, and programmable test capabilities\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eKQ7901-80-20\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Value\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n(0℃~40℃)\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e0-80V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e0-20A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e400W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Regulation\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+20 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine Regulation\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+2.5 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSetting Resolution\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReadback Resolution\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSetting Accuracy\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+20mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e≤0.05%+10mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReadback Accuracy\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+20mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e≤0.01%+15mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRipple\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n(20Hz~20MHz)\u003c\/td\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e≤ 50 mVp-p ≤ 6 mVrms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e≤ 40 mArms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRise Time (No Load)\u003c\/td\u003e\n\u003ctd\u003eTime\u003c\/td\u003e\n\u003ctd\u003e≤300mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRise Time (Full Load)\u003c\/td\u003e\n\u003ctd\u003eTime\u003c\/td\u003e\n\u003ctd\u003e≤1000mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFall Time (No Load)\u003c\/td\u003e\n\u003ctd\u003eTime\u003c\/td\u003e\n\u003ctd\u003e≤500mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFall Time (Full Load)\u003c\/td\u003e\n\u003ctd\u003eTime\u003c\/td\u003e\n\u003ctd\u003e≤100mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Shenzhen Kuaiqu Electronic Co., Ltd","offers":[{"title":"US 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