Item specifics
Description
MT3608 DC-DC boost converter module, input 2-24V, output adjustable up to 28V, max 2A output current. Onboard potentiometer for voltage adjustment, power LED. Ideal for lithium battery boost to 5V/9V/12V, sensor power supply, portable devices, DIY boost circuits
MT3608 DC-DC Boost Converter Module Application features:
◆ Main Chip
MT3608 (SOT23-6 package)
◆ Input Voltage
DC 2V ~ 24V
◆ Output Voltage
DC adjustable (up to 28V)
◆ Output Current
Max 2A (input power dependent)
◆ Switching Frequency
1.2MHz
◆ Conversion Efficiency
Up to 93%
◆ Output Adjustment
Onboard 3296W potentiometer (clockwise to increase voltage)
◆ Onboard Indicator
Red power LED
◆ Module Size
Approx. 36mm × 17mm
◆ Typical Applications
Lithium battery boost to 5V/9V/12V
Sensor power supply
Portable device power
Solar system boost
DIY adjustable power supply
MCU system power
LED driver
◆ Key Advantages
Compact size
Wide input voltage range
Adjustable output
High efficiency (1.2MHz switching frequency)
Few external components
Plug-and-play
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FAQ:
1.What is the MT3608 DC-DC boost converter module and its key specifications?
The MT3608 module is a compact step‑up (boost) voltage converter built around the MT3608 chip. It raises a low DC input voltage to a higher, adjustable output voltage. Key specs: input range 2 V – 24 V, adjustable output up to 28 V (via an on‑board potentiometer), maximum output current 2 A (subject to input/output conditions), 1.2 MHz switching frequency, peak switch current 4 A, and a typical efficiency of up to 93 %. The module measures approximately 36 mm × 17 mm × 14 mm and is widely used for battery‑powered projects, LED drivers, and portable equipment.
2.How do I connect the MT3608 module to a power supply and load?
Wiring is straightforward. The module has four pins: IN+ (positive input), IN‑ (negative input), OUT+ (positive output), and OUT‑ (negative output). Connect your DC power source (e.g., battery, solar panel) to IN+ and IN‑, observing correct polarity. Connect your load to OUT+ and OUT‑. Do not reverse the input polarity, as there is no reverse‑polarity protection. Before connecting a sensitive load, adjust the output voltage to the desired level using a multimeter and the on‑board potentiometer.
3.How do I adjust the output voltage of the MT3608 boost converter?
The output voltage is set by a multi‑turn potentiometer on the module. Using a small screwdriver, turn the pot clockwise to increase the output voltage and counter‑clockwise to decrease it. Always connect a multimeter to the output terminals while adjusting. The output can be set from just above the input voltage up to about 28 V. Because the potentiometer is quite sensitive, make small adjustments and monitor the voltage closely to avoid over‑voltage damage to your load.
4.What is the maximum output current of the MT3608 module, and how does it vary with input voltage?
The module is rated for a maximum output current of 2 A, but this is only achievable under specific conditions (e.g., with a high input voltage and a small step‑up ratio). The actual maximum current depends on the input voltage, output voltage, and efficiency. Since the chip’s peak switch current is 4 A, the output current capability drops significantly at low input voltages and high output voltages. For example, boosting 3.7 V to 12 V may yield a maximum output current of around 800 mA – 1 A. Always calculate the power requirements and keep the module’s total output power under approximately 10 W for reliable operation.
5.What is the typical efficiency of the MT3608, and how can I maximize it?
The MT3608 can achieve up to 93 % efficiency under ideal conditions (moderate load, small voltage difference). Efficiency drops at very light loads or when the step‑up ratio is large. To maximize efficiency: use thick, short wires to reduce resistive losses, ensure the input power source can supply sufficient current without voltage sag, and operate the module within 50 % – 80 % of its maximum rated current. The small on‑board inductor and capacitor are optimised for the 1.2 MHz frequency, so no additional external components are normally needed.
6.Can the MT3608 module be used to charge a battery or power sensitive electronics?
The MT3608 module provides a fixed, adjustable output voltage and is not a battery charger. It does not include constant‑current limiting or charge termination. Directly connecting it to a discharged battery can damage both the module and the battery due to excessive current draw. For powering sensitive electronics (e.g., microcontrollers, sensors), the output voltage must be set precisely, and it is strongly recommended to add an external LC filter or a low‑dropout regulator (LDO) after the module to reduce the inherent output ripple of the switching converter.
7.What is the switching frequency of the MT3608, and does it cause audible noise?
The MT3608 operates at a fixed switching frequency of 1.2 MHz. This high frequency is well above the audible range (20 Hz – 20 kHz), so the converter itself does not produce an audible whine. However, under very light load conditions, the chip may enter a pulse‑frequency modulation (PFM) mode where the switching frequency drops, and the ceramic capacitors may vibrate slightly, producing a faint audible hum. This is normal behaviour and can be mitigated by adding a small load or using an output capacitor with lower acoustic noise.
8.How does the MT3608 differ from other boost converters like the MT3608L or XL6009?
The MT3608L is a lower‑current variant with a peak switch current of 2 A (vs. 4 A for the MT3608), making it suitable for smaller loads. The XL6009 is a higher‑power boost converter with a 4 A peak switch current as well, but it operates at a lower 400 kHz frequency, requiring larger inductors and capacitors, and it supports an output voltage up to 35 V. The MT3608’s high 1.2 MHz frequency enables a very compact module, while the XL6009 is better for higher‑power applications where larger external components are acceptable. The MT3608 is the most popular choice for low‑to‑medium power portable boost tasks.
9.What protection features does the MT3608 module include?
The MT3608 chip itself includes under‑voltage lockout (UVLO) and thermal shutdown. However, most low‑cost MT3608 modules do not include output over‑voltage protection, short‑circuit protection, or reverse‑input‑polarity protection. A short circuit on the output will likely destroy the module or the input power source. To improve safety, it is advisable to add an external fuse, polarity‑protection diode, or load switch, especially in permanent installations.
10.What are the most typical applications for the MT3608 boost converter module?
The MT3608 is extremely popular in battery‑powered projects that need a higher voltage rail: boosting a single Li‑Ion cell (3.7 V) to 5 V for USB devices, 9 V or 12 V for routers/Arduino boards, driving LED strips, powering small motors, and creating portable power banks. It is also widely used in solar‑powered systems, sensor nodes, and DIY test equipment where a stable, adjustable high voltage is needed from a low‑voltage source.