Product description: S18V20F5 - step-up/step-down converter - 5V 2A
The S18V20F family of inverters featuresa wide input voltageof 3 to 30 V. The output voltage is adjustable to5 Vor 9 V,6 V,12V depending on the model selected. The efficiency of 80 - 90 % and the high current capacity of up to2 Amake the systems suitable for many circuits supplying electronic projects and devices.
Included: module, 2.54 mm goldpin connectors and ARK connectors for self soldering.
Battery power supply
The ability to raise or lower the input voltage to a fixed value makes the modules well suited forbattery-powered devices. The voltage of portable power sources, such as accumulators and batteries, depends on their level of charge. The converter circuit allows you to stabilize the voltage at a selected level. Therefore, it can be useful in situations where it is necessary:
- to maintain a stable voltage of 5 V in systems powered from a basket with four NiMh batteries (sticks), which when fully charged give a voltage of about 6 V, partiallydischargedbelow 3.3 V,
- 5 V power supply from a single Li-Po cell during the entire battery discharge cycle,
- 5V power supply from a 9V battery, which may be partiallydischargedand may give a voltage below the required one.
Downloads
The module has four outputs:
- VIN-Input voltage from 3 V - 30 V. If a lower voltage is applied, the module will not switch on, higher voltage may damage the system.
- GND- Mass potential. The system has two GND outputs, which are connected to each other.
- VOUT- Adjustable output voltage: 5 V.
- ENABLE- switching on the system. By default, the module is switched on - the ENABLE pin is pulled to the power supply through a100 kresistor. In order to switch the inverter into the sleep state (low current consumption), the low state must be given, voltage below 0.7 V. The current in the sleep state is determined by the pull-up resistor of the ENABLE pin, it is from 10 to 20 uF for each Volt of the supply voltage. (for example, for 3 V supply it will be 30 uA, 30 V - about 500 uF).If the sleep function is not used, the ENABLE pin can be left disconnected.
Step-up/step-down converter.
The connectors are properly signed on the board. The kit includes 2.54 mm goldpin raster connectors and larger ARK connectors, which allow the cables to be mounted with a screwdriver.
Dimensions of the step-up/step-down converter.
The module can be plugged intoa contact board, connected withwires or solderedinto a dedicated printed circuit board. Mounting is possible with four 2.2 mm diameter holes, matching the ratio of M2 threaded screws - the holes are not threaded.
Efficiency of the system
Efficiency is defined as the ratio of input power to output power (Pout/Pin). This parameter is particularly important for battery operation when it is important to keep the system running as long as possible on a single charge. The efficiency of the inverter depends on the flowing current and the input voltage (graph below). On average, it is between 80 - 90 %, which allows the maximum use of battery power.
The efficiency of the system as a function of the current drawn for different input voltages.
Output current
The maximum current that the system can deliverdependson: input voltage and operating temperature. The dependence of the maximum current consumption on the input voltage is shown in the figure below. If the operating temperature reaches too high a value, the module will automatically disconnect the power supply.
The output current depends on the input voltage for different output voltages.
Inverter specifications
- Input voltage: 3 V to 30 V
- Output voltage: 5 V
- Accuracy of output voltage: 4 %
- Maximum output current: 2 A
- Efficiency of 80 - 90 %
- System current consumption (quiescent current): 5 mA
- Possibility to switch the system to standby mode
- Integrated reverse connection protection against reverse connection of supply voltage
- Four mounting holes for M2 screws
- Outlets: 2.54 mm goldpin or ARK type connectors (self-soldering kit)
- Dimensions: 43.5 x 21 x 9.7 mm
- Weight (without connectors): 7.5 g
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