Packing list:
1 PCS 20W DC DCStep-up/Step-down Converter Positive and negative voltage Dual voltage Module
Description:
Input voltage 3.6~30V,output ±3~±30V adjustable
Maximum output power: 20W (For details, please see the description at the bottom or ask us for information.)
Conversion efficiency :69-89%
Quiescent current: 3-4mA
20W DC-DC Boost-Buck Converter working frequency 180KHZ.
Operating ambient temperature : -40~+85 Degrees Celsius
Size : 60 x 34 x 15mm
Weight : 33g(With terminal), 29g(no terminal)
High efficiency up to 89%
Built in Frequency Compensation
Built in Soft-Start Function
Built in Thermal Shutdown Function
Built in Current Limit Function
Note:
1 In order to obtain a more stable voltage, it is recommended that the output is greater than 15MA
2
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 current(As shown below)
Applications
ADC/DAC/Operational Amplifier Reference voltage
RS232 RS485 RS422 Bus
Audio equipment
Low power audio power supply
Car audio amplifier dual power board
LCD power supply
Instrumentation equipment
Instrumentation multimeter
Attention :
This is a DC-DC voltage converter module,Must be noted when using:
1 Input voltage can not be greater than the maximum input range
2 Output power can not be greater than the maximum load for a long time
3 Input power must be greater than the output power, because the power consumption of the module itself
Q & A:
Q1 : Why output voltage is less than the nominal voltage
A1: Input power supply power is too low.Test the input voltage with a multimeter,a t this time of the input voltage is very low
Q2 : Why is the negative voltage not output or the output too low?
A2 : The negative voltage cannot be used alone. When using a negative voltage, the same load must be connected at the positive voltage terminal.
