PSM-230 DC-DC ADJUSTABLE 8A STEP DOWN CONVERTER
This is a versatile 8 Amp adjustable step down DC-DC converter.
Can be used as a step down converter for a regulated power supply, high current LED driver or battery charger.
Can be used in constant current or constant voltage modes.
Two potentiometers allow for control of both current and voltage output.
Red Green LED indicator indicates charging status.
Output short circuit protected.
Applications
1. High-power LED constant current driver.
2. Lithium battery (or lead accumulator) charge.
3. Vehicle-mounted power supply.
4. Low voltage system power supply.
5. 6V, 12V, 14V, 24V battery charge.
6. On-board laptop power supply.
7. Regulated power supply.
Specifications
Input voltage range: DC 7-32V
Output voltage range: (1) DC 0.8-28V continuously adjustable.
(2) Fixed output choose between 0.8v-28v
Constant current range: 0.2-8A
Max. Output Current: 8A (fan recommended if heat sink above 65 degrees)
Max. Operating Temp. -40 °C to +85 °C
Max. Output Power: ~ 200W
Min. Output Voltage: 1V
Conversion efficiency: Up to about 95%
Operating frequency: 300KHZ
For Input 24V and output 12V 5A ripple is ~50mV
Output short circuit protection: Yes (determined by constant current setting)
No-load current: Typical 20mA (24V switch 12V)
Load regulation: ± 1% (constant)
Voltage regulation: ± 1%
Dynamic response speed: 5% 200uS
Size: 65 x 47 x 22mm (L x W x H)
Notes
Potentiometer(CV) is used to regulate voltage
Potentiometer(CC) is used to regulate current
Dual color indicator, green (no load) indicates fully charged, red (load) indicates charging
Battery Charger Application
• Check the battery float voltage and charging current that the battery needs, as well as the input voltage of the module.
• With the battery not connected, adjust the constant voltage potentiometer for output voltage of about 5V.
• Use a multi-meter in 10A current scale to measure output short-circuit current and adjust the current potentiometer to the desired charging current value.
• Adjust the constant voltage potentiometer to set the output voltage to the float voltage.
• Connect the battery to start the charge.
LED Constant Current Drive Application
• Determine the operating current and voltage for the LED you need to drive.
• With the no load connected adjust the constant voltage potentiometer for output voltage of about 5V.
• Use a multi-meter in 10A current scale to measure output short-circuit current and adjust the current potentiometer to the desired LED operating current.
• Adjust the constant voltage potentiometer to set the output voltage to the LED operating voltage.
• Connect the LED to check the operation.
WARNING
