input is 12V, output for the globe was between 13-14V, with other loads output can be set up to 50V.
So with any output voltage the input current increases far beyond of what the load needs.
That is not the way it should work! If the input current for 12 V input is greater than 15 A (causing the fuse to blow) something is seriously wrong. Perhaps the MOSFET switches are shorted. Perhaps the circuit isn't oscillating. Did you accidentally connect power with reverse polarity? This device has no reverse polarity protection. Considering that it costs less than six bux, you might be better off just purchasing another one instead of trying to repair the one you have, which is clearly defective.
I found the below description at
this website. If accurate, the device should work just fine with 12 V input to produce 13 to 14 V output, driving your 12 V, 60 W, car globe lamp load with slightly more than about 5 A of current (60/12 = 5). With reasonably high efficiency (more than 90%), the load current should be roughly the same as the supply current, and certainly nowhere near 15 A.
400W DC-DC Step-up Boost Converter Constant Current Power Supply Module
Description:
- 100% brand new and high quality.
- Features:
This is a great 400W DC to DC step-up power supply module for electric equipment, digital products, laptop, etc.
Input and output are designed with screw terminals for convenient wire connection and disconnection.
High efficiency, the maximum conversion efficiency can be 96% and efficiency is related to input/output voltage, current and voltage difference.
There are 2 heat sinks that would ensure a better heat dissipation.
It can also be used as a driver for high power LED lights or voltage regulator for solar panels.
Output Voltage/Current Adjustment:
1, Adjust "CV-ADJ" potentiometer clockwise to reduce voltage, counterclockwise to increase voltage.
2, Adjust "CC-ADJ" potentiometer counterclockwise about 30 circles to minimize the output current before connecting to load(clockwise to increase current, counterclockwise to reduce current). Then adjust "CC-ADJ" clockwise to the current value you need. If you use the module for battery charging, connect to output after battery is fully discharged. Because if the more energy is left in battery, the less charging current will be.
Specifications:
Type: Non-isolated boost module
Input Voltage: DC 8.5V to 50V
Output Voltage: DC 10V to 60V (continuously adjustable, default 19V)
Max. Input Current: 15A (please enhance heat dissipation if more than 8A)
Max. Output Current: 12A (related to the input and output voltage difference, the greater voltage difference is, the smaller output current will be. please enhance heat dissipation when current is over 7A)
Quiescent Current: 10mA(will increase when convert 12V to 20V)
Constant Current Range: 0.2A to 12A
Output Power = Input Voltage*Current
Operating Temperature: -40° to 85°(if temperature is too high, please enhance heat dissipation)
Frequency: 150KHz
Max. Conversion Efficiency: 96% (Efficiency is related to input/output voltage, current and voltage difference)
Over Current Protection: Yes (if input current is more than 15A, it will automatic reduce output voltage)
Reverse Input Protection: No
Size: 6.7x4.7x2.7cm/2.64x1.85x1.06inch
Quantity: 1 Pc