The MT3608 module is a DC-DC boost converter circuit board that can step up an input voltage from 2V to 24V to an output voltage ranging from 3V to 28V with 93% efficiency. It operates at a switching frequency of 1.2MHz and can provide a maximum output current of up to 2A. The output voltage can be adjusted using a multi-turn potentiometer. This module is suitable for use as an LED driver or to power battery-operated devices.
Specification
The quick technical specification of the circuit board is given below.
| Module Type | Boost Converter |
| Chip Used | MT3608 |
| Input Type | DC |
| Input Voltage Range | 2V to 24V |
| Input Terminal | +VIN, -VIN |
| Operating frequency | 1.2MHz |
| Output Type | Adjustable DC |
| Output Voltage | 3V to 28V |
| Output Terminal | +VOUT, -VOUT |
| Output Current | 1.2 Ampere Max. |
| Efficiency | 93% |
| PCB Colour | Blue |
Circuit Diagram
Schematic of mt3608 boost converter module circuit as shown below.
The components are used in the circuit boards are - U1: MT3608 IC, C1 C2: 22uF Ceramic Capacitor, L1: SMD 22uF 2A Inductor, D1: SMD SS34 Schottky Diode, PR1: 100K Multi-Turn Potentiometer, and R1: 2.2K 0608 SMD Resistor.
Circuit Working Explanation
The working principle of this boost converter module circuit is simple, where the main component is the 6-pin SOT23 package MT3608 integrated circuit.
When the circuit receives a DC input voltage ranging from 2V to 24V, capacitor (C1) filters out input voltage noise. Initially, the IC (U1) operates by rapidly switching its internal transistor on and off, allowing current to flow through the inductor (L1), from the SW pin to ground, and store energy in its magnetic field during the "on" phase. The MT3608 integrates a fixed 1.2 MHz frequency peak current mode boost architecture to regulate the voltage at the feedback pin and adjust the current (up to 2A) flowing through L1.
When the transistor turns off, the stored energy in the inductor is released, boosting the voltage and pushing current through the output diode (D1) toward the noise-filtering capacitor (C2) and the load. The potentiometer (PR1) and resistor (R1) form a voltage divider that sets the IC's feedback reference and adjusts the output voltage from 3V to 28V.
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