Product parameters

• Module model: 1200W20A adjustable vehicle charging power module
• Module nature: non-isolated boost module
• Power protection: input overcurrent protection (input over 25A, automatic protection, power supply does not boost)
• Short-circuit protection (input 30A fuse) Double short-circuit protection, use more secure input reverse connection protection (150A power MOS tube anti-reverse. Can be reversed for a long time)
• Input voltage: DC10-60V (directly input 10-60V without jumper cap to select voltage)
• Output voltage: 12-80V continuously adjustable
• Input current: 20A (MAX) more than 15A, please add a fan for cooling (the input current can reach 25A when the input voltage with fan cooling is 12-24V)
• Output current: If 18AMAX exceeds 10A, please strengthen heat dissipation (related to the input and output voltage difference, the larger the voltage difference, the smaller the output current)
• Static working current: 15mA (when 12V rises to 20V, the higher the output voltage, the higher the static current will increase)
• Constant current range: 0.5-18A (+/-0.3A)
• Input anti-reverse connection: yes (150A power MOS tube anti-reverse. It can be reversed for a long time)
• Low voltage protection: yes (9-50V adjustable)
• Working frequency: 150KHz
• Working temperature: -40~+85 degrees (please strengthen the heat dissipation when the ambient temperature is too high)
• Conversion efficiency: 92% (efficiency is related to input, output voltage, current, pressure difference, small pressure difference, high efficiency)
• Installation method: 4 pieces of 3mm copper pillars
• Wiring method: terminal block
• Module size: length 130mm width 52mm height 53mm

Features

Output voltage/output current regulation/input low battery protection regulation (adjustable)

Voltage adjustment: use a flat-blade screwdriver to adjust the output terminal "V-ADJ" potentiometer (marked in the figure above) when the power is turned on and no load. When the output voltage is adjusted from high voltage to low voltage, the response will be slower. The built-in adjustment range is smaller.

Current adjustment: adjust the "A-ADJ" potentiometer counterclockwise about 30 turns, set the output current to small, connect the LED, and adjust the "A-ADJ" potentiometer clockwise to the current you need. For battery charging, after the battery is fully discharged, connect it to the output and adjust RV2 to the current you need. When charging, be sure to use the discharged battery to adjust it, because the more battery power is left. , the smaller the charging current.

Special attention is: Do not adjust the current by short-circuit output, and the circuit structure of the boost module cannot be adjusted by short-circuit.

Input low battery protection adjustment: The low battery protection is mainly aimed at preventing battery over-discharge when the input power is battery, and the battery voltage is too low to damage the power module and battery. For example, set 12V battery low battery protection. Connect a 10V voltage to the input terminal of the power module and adjust RV1 with a flat-blade screwdriver (clockwise to increase the protection voltage, and counterclockwise to lower the protection voltage) until the UVLO light is on. At this time, the low battery protection voltage is 10V. When the voltage drops to 10 V, the power module does not rise (the input voltage is equal to the output voltage). When using a boost power supply, the following points should be noted:

1. The voltage of the input power supply must be above 10V.

2. When using a switching power supply as the input power supply, first connect the input power supply and adjust the voltage under no-load condition. Then pick up the load. (It must be ensured that the switching power supply is always working), or adjust the voltage at no-load, and then disconnect the switching power supply before connecting to the load. Turn on the switching power supply and the power module when the switching power supply is turned on. (Because the switching power supply has a climb time when it is turned on. When the voltage is lower than 10V, the chip has not yet worked. It is easy to break down the MOS tube.

3. When used for constant voltage in constant current mode, make sure that the constant voltage must be higher than the input voltage. (For example, the input voltage of the power supply is 12V and the no-load output voltage is 15V. Then connect a 32V LED light. This situation is not allowed. It is necessary to connect 4 LED lights in series)

Scope of application

1. DIY a regulated power supply, the input is 12V, and the output can be adjusted from 12-80V.

2. Power supply for your electronic equipment, you can set the output value according to your system voltage.

3. As a car power supply, power supply for your notebook computer, PDA or various digital products.

4. DIY a high-power notebook mobile power supply: equipped with a large-capacity 12V lithium battery pack, so that your notebooks can be illuminated wherever you go.

5. Solar panel voltage stabilization.

6. Charge batteries, lithium batteries, etc.

7. Drive high-power LED lights.

Tips

1. During use, please power on the module first, and then connect the load, which is especially important in high-power loads.

2. The input voltage should be guaranteed to be stable, especially when some low-voltage (12V) input power supplies are connected to the load, the voltage will drop below 10V, and it is easy to break down the power tube at this time.

3. The input voltage should avoid the upper and lower limit voltages as much as possible, which can avoid damage to the module caused by voltage fluctuations.

4. Do not connect the fuse for power-on test after the fuse is burned. The reason must be eliminated before power-on. Generally, the fuse is burnt due to the breakdown of the power tube.

5. It is strictly forbidden to short-circuit the load to adjust the current.

6. Two or more modules cannot be used in parallel with input and output at the same time, otherwise the current limiting function will fail.

7. It is not suitable for the voltage difference between the input and output to be small, otherwise the constant current function will not be guaranteed. For example, some friends use the 12v battery to boost the voltage to 14v to charge the 12V battery. If this current is too high, it will burn the insurance.

8. The normal voltage of the module is normal. Some laptops cannot be charged and used. This is a non-quality problem, because the current computer has an identification function and may refuse to use the power supply of the non-original charger.