Rechargeable DC-DC step-down 27V to 25-3V adjustable power supply module

Parameters:

• Boot mode: first connect input power supply, second the output 
• Input: IN +: positive, IN-: negative 
• Output:output +: positive, output -: negative 
• Output Current: 3A(Max)
• Input Voltage :4.5-25.5V
  
• perating temperature: Industrial grade (-40 ℃ to 85 ℃) 
• Load regulation: ± 1% 
• Voltage regulation: ± 0.5% 
• Dynamic response speed: 5% 200uS 
• Short circuit protection: current limiting, recovery 
• Static power consumption is only about 6mA.
• Size: 31x17x18mm

Usage:

• Adjusting: first connect input power correctly (4.5-26.5V) then using multimeter to monitor the output voltage and adjust potentiometer (usually clockwise turn boost, inverse time step-down),
• Output voltage :3-25V continuously adjustable (no load debug) OUR default voltage is 5V when deliver. For other voltage,you can adjust yourself,or contact us.
• Input voltage 5-25.5V, output can be adjusted between 3V-24V. (OUR default delivery voltage is 5V)  (For other voltage,you can adjust yourself,or contact us.)
• Maximum output current is 3A, we recommend you under 3A current, leaving a certain margin.  Without heat sinks and ventilation, the power can be up to 48W or so, up to 93% efficiency.
• Since it is the step-down DC-DC circuit, the input voltage should be 1.5V higher than output voltage to keep the output voltage steady.
• With short circuit protection, if output is short circuit, it is OK,because it can protect iteself,Limit current protection, even if the circuit is automatically protected! Static power consumption is only about 6mA.

Notice:  Under large current working status, if the board feels very hot, heat sink should be installed, 

For other Use:

• Constant current limiting voltage. It can be used not only as adjustable step-down power,but also as the charging module:. Just limit set the output current (the buyer can change the resistance R1R2 to change the output current) 

Application:

• Vehicle power supply, connect vehicle cigarette holder to the input termination point of the module, then you can adjust the potentiometer, Output voltage can be adjust in 3-27V(because it is step-down module,the output voltage is 1.5-3V lower than the input); It can work for your phone, MP3, MP4, PSP power charging and many other devices.so easy and convenient!
• Step-down charger: As the module has a constant current limiting voltage function, it can be used as a adjustable power supply,also as a charge: Just limit set the output current (the buyer can change the resistance R1R2 to change the output current) It can charge for the lead-acid batteries, lithium batteries, the charging voltage can be adjusted by the buyer.
• Working for your electronic equipment as power supply, when your equipment needs 3-22V, and you only have 12V or 24V battery at hand, this module can be step-down directly to the 3-22V, solving your troubles. 
•  Working for System-level before as power supply, when you do a project, and the input supply voltage is lower than the voltage you need, (3-25V), our module will be your best choice.