Product description: U3V40F5 - 5V 4A step-up converter - Pololu 4012
Pololu brand step-upconverter with an output voltage of 5 V and a capacity of 4 A. The supply voltage ranges from 1.3 V to 5 V (the starting voltage is 2.7 V). Typical inverter efficiency ranges from 90% to 95%, depending on input voltage and load. The module has temperature protection; when the temperature threshold is exceeded, it will shut down.
5 V / 4 A step-up converter pinouts.Outputs of the step-up converter module
The step-up converter has four pin-outs in the form of six 2.54 mm solder holes.
- EN - pin to disable the system when the voltage is below 0.4 V, system on by default: 30 kΩ resistor pulled up from EN to VIN.
- VIN - input voltage from 2.7 V to 9 V (after starting up the chip, the input voltage may be at least 1.3 V).
- GND - system ground (common for VIN and VOUT).
- VOUT - output voltage 9 V.
Hazardous voltage pulses
When power is applied to the module, dangerous, short-lived high amplitude eclectic impulses (so-called pins) may appear, which can permanently damage the system. Pololu's tests show that for input voltages above 11 V pins can have amplitude large enough to damage the module. To protect against this undesirable phenomenon it is recommended to solder a capacitor of at least 33 uF as close as possible to the pins supplying the converter.
System efficiency
Efficiency is defined as the ratio of output power to input power (power out)/(power in). It is a very important parameter in the case of work with portable sources of energy (batteries and accumulators), where the time of work on one charging cycle counts. The efficiency of this circuit is from 90% to 95%. The output current depends on the input voltage and the system load.
Current efficiency of the U3V40F5 step-up converter.
U3V40F5 5 V / 4 A step-up converter, including goldpin connector kit.U3V40F5 step-up converter specifications
- Input voltage: from 1.3 V to 9 V (the minimum voltage to run the circuit is 2.7 V)
- Output voltage: 5 V (with 4% accuracy)
- Typical efficiency: 90% to 95%, depending on input voltage and load
- Switching frequency: ~600 Hz at high load
- Energy-saving mode
- Typical no-load idle current less than 2 mA
- The 9.5 amp switch allows for:
- Instantaneous input current up to 9.5 A
- Up to 4.5 A input current for a few seconds
- up to 4 A input current for a longer time
- Integrated protection:
- shutdown due to over temperature
- soft-start function limits the inrush current and gradually increases the output voltage
- Output overvoltage protection (typically 16.5V)
- input current limitation cycle by cycle up to 9.5 A
- Dimensions: 15.2 x 15.2 x 5.6 mm
- Weight: 1.5 g
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