7W USB DC 5V to 6V 9V 12V 15V Adjustable Output Voltage Step up Board DC-DC Boost Converter Features: . This is a DC-DC boost converter module with working frequency of 1.0 MHz. The module has high efficiency, usually can be 79-90%. Small size and light weight, it is convenient e. Widely used for 6-15V low power motors, 6-15VLED lighting, hard drive power supply, 9V 12V 15VRouters and network equipment, wireless communication equipment, 315M 433M wireless remote controller. Specification: Input voltage 3~6V, output 6-15.5V Maximum input current: 1.4A Long-term work Current:1A Conversion efficiency: 79-90% Input: USBMaleInterface,DC 3-6V Output : 2 PINXH2.54,DC 6-15.5V If input dc 5v,output 6-15.5V Adjustable Power : Maximum 7W DC-DC Boost module working frequency 1.0MHZ. Operating ambient temperature : -40~+85 Degrees Celsius. Size: 47.5*16mm / 1.9*0.6in Weight: 7g / 0.2oz (approx.) Package list: 1 * Module Note: This is a DC - DC voltage converter module, please pay attention when using: 1, The input voltage should not be higher than maximum input range; 2, The output power cannot be higher than the maximum load for a long time. 3, The input power must be higher than output power, because of the power consumption of the module itself. FAQ: Q: Why the output voltage is lower than the nominal voltage? A :Because the input power is too low.Use a multimeter to test the input voltage, the input voltage is very low at this time. Modify Parameter Description: 1.4A current limiting resistor,Remove the resistance, the maximum input current can reach 2A. But IC have "Over Temperature Protection" Function.It will turn off the power MOSFET automatically when the internal junction temperature is over 150 Degrees Celsius. The power MOSFET wake up when the junction temperature drops 30 Degrees Celsius under the OTP threshold temperature The master chip is FP6291.