DC-DC 7-40V to 1,2-35V 300W 8A Step-down Voltage Regulator Power Modul with LED

Features:

1. Use a dedicated benchmark IC, and high-precision current sensing resistor, make more stable constant current, (when 20°C to 60°C constant current 5A, temperature drift less than 5%). suitable for LED driver.
2. Fixed turn lamp current is 0.1 times the current value (When charging, used to identify whether the battery is fully charged);
3. High output current, the max output current can reach 8A.
4. Low output ripple , high frequency capacitor reduces output ripple.

Module parameters:

• Module Properties: non-isolated step-down module, constant current and constant voltage module (CC CV), charging module
• Input voltage: 7-40V
• Output voltage: 1.2-35V (continuously adjustable)
• Output Current: 8A Max ( power tube temperature exceeds 65°C please add cooling fan )
• Constant current range :0.2-8A ( adjustable )
• Dropout voltage: 1V
• Output Power: <300W
• Conversion efficiency : <95% 
• Operating frequency: 180KHZ 
• Output ripple : 20M bandwidth ( for reference only )
• Input 24V Output 12V 5A ripple around 50mV ( excluding noise )
• Operating temperature : Industrial grade (-40 °C to +85 °C)
• No-load current : Typical 20mA (24V step down to 12V)
• Load regulation : ± 1% ( constant voltage)
• Voltage regulation : ± 1%
• Dynamic response speed : 5% 200uS
• Output short circuit protection : Yes , constant current ( constant current value you set)
• Input Reverse Polarity Protection: None
• Output prevent backflow : None.
• Wiring: Terminal
• Size:65(L)*47(W)*23.5(H) mm

Applications:

1. High-power LED constant current drive ,
2. Lithium battery(or Iron battery) charge,
3. 6V, 12V, 14V, 24V battery charge ,
4. Nickel-cadmium nickel-metal hydride battery ( battery pack ) charge ,
5. Solar panels and wind turbines

Potentiometer adjustment:

clockwise ( increase ) , counterclockwise ( decrease ). The potentiometer close to the input port is for voltage adjust (CV), the potentiometer close to the output port is for current adjust(CC).
Indicator : double color indicator. When charging the indicator is RED, fully charged is GREEN( No load is green ).

Battery charge:

1. Make sure of the battery float voltage and charging current that you need, the input voltage of the module.
2. Adjust the constant voltage potentiometer, adjust the output voltage to about 5V.
3. Use the multimeter in 10A current scale to measure output short-circuit current, and adjust the current potentiometer to make sure the output current to the expected charging current value.
4. Adjust the constant voltage potentiometer make the output voltage reaches the float voltage;
5. Connected to the battery, try to charge.

• (1,2,3,4 steps to connect the power module input, output no-load does not connect battery.)

LED constant current drive:

1. Make sure operating current and Max operating Voltage of the LED you need to drive.
2. Adjust the constant voltage potentiometer, adjust the output voltage to about 5V.
3. Use the multimeter in 10A current scale to measure output short-circuit current, and adjust the current potentiometer to make sure the output current to the expected LED operating current.
4. Adjust constant voltage potentiometer make the output voltage reach the maximum LED operating voltage.
5. Connect LED, test.

• (1,2,3,4 steps to connect the power module input, output No-load does not connect LED.)

Package List:

1x 300W 8A Adjustable Power Modul Step-down Voltage