MP1495 module is a compact 500kHz synchronous DC-DC buck converter circuit board. It can deliver a maximum continuous output current of 3A with excellent load regulation and multiple output voltages (1.25V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V) at 92% efficiency across a 5V–16V input supply range.
Specification
The quick technical specification of the circuit board is given below.
| Module Type | Buck Converter |
| Chip Used | MP1495 |
| Input Type | DC |
| Input Voltage Range | +5V To +16V |
| Input Terminal | IN+, IN- |
| Output Type | Multi DC |
| Output Voltage | 1.25V (default), 1.5V, 1.8V, 2.5V, 3.3V, 5V |
| Output Terminal | OUT+, OUT- |
| Output Current | 3 Ampere Max. |
| PCB Colour | Green |
Circuit Diagram
Schematic of mp1495 multi output buck converter module circuit is shown below.
The components are used in the circuit boards are - U1: MP1495 IC, L1: 4.7uH SMD Inductor, R1 R8: 91k 0603 SMD Resistor, R2 R9: 11k 0603 SMD Resistor, R3 R12: 75k 0603 SMD Resistor, R4 R7: 51k 0603 SMD Resistor, R5 R11: 33k 0603 SMD Resistor, R6: 100R 91k 0650 SMD Resistor, R10: 20k 0603 SMD Resistor, R13: 20R 0603 SMD Resistor, C1 C6 C7: 22uF 0805 SMD Ceramic Capacitor, and C2 C3 C4 C5: 100nF 0603 SMD Ceramic Capacitor.
Circuit Working Explanation
The working principle of this buck converter circuit is simple and its main component is the MP1495 IC (U1). When a 5V–16V DC supply is applied to the input pin-2 of the IC (U1), the circuit begins switching at a frequency between 100–500kHz. The output from the SW pin-3 passes through the inductor (L1). A voltage divider resistors (R3, R4) sets the EN/Sync control pin-6 to enable the internal 5V regulator.
Another voltage divider resistors (R1, R2), is connected between the 5V regulated VCC pin-7 and ground to provide a 0.5V reference at the AMM pin-1, defining the transition point between AAM and CCM modes.
To supply sufficient voltage to the integrated MOSFET gate, the SW pin-3 output is coupled through capacitor (C5) and resistor (R6) to the BST pin-5.
A voltage divider resistors (R7, R8) between the inductor (L1) output and ground provides a reference voltage that, via resistor R5, feeds the feedback pin 8 to set the default 1.25 V output. To select one fixed output voltage (1.5V, 1.8V, 2.5V, 3.3V, or 5V), the corresponding resistor (R9–R13) is chosen by shorting the appropriate onboard pad. Capacitors C1, C2, C3, C4, C6, and C7 stabilize the DC voltage and filter switching noise.
0 Comments: