Output Frequency: DC-DCOutput Type: DUALType: DC/DC ConvertersModel Number: DD39AJPASize: 60 x 34 x 15mmOutput Current: Less than 3000mAWeight: 29g(no terminal)terminal:no terminalOutput Voltage: DC +-3-30VInput Voltage: DC 3.6-30Vcolor:greenMaterial: plasticDescription:Maximum output power: 20WConversion efficiency :69-88%Quiescent current: 3mA20W DC-DC Boost-Buck Converter working frequency 180KHZ.Operating ambient temperature : -40~+85 Degrees CelsiusHigh efficiency up to 88%Built in Frequency CompensationBuilt in Soft-Start FunctionBuilt in Thermal Shutdown FunctionBuilt in Current Limit FunctionNote:1 In order to obtain a more stable voltage, it is recommended that the output is greater than 15MA2 V- cannot be used alone, or no voltage output.But you can just use V+3 The startup current of the module is 2.5-3 times the operating current.4 Increasing the 1UF-10UF MLCC capacitor reduces the startup currentPackage Contents:1 PCS x 20W DC DC Boost-Buck Converter Positive and negative voltage Dual voltage ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.