Product description: D24V25F9 - step-down converter - 9 V 2.5 A
A step-down (buck) converter used to power systems operating with voltages of 9 V. The advantage of the system is a wide range of input voltages from 10.5 V to as much as 38 V. The D24V25Fx module allows for current consumption of up to 2.5 A.
Kit contents.
Derivations
The connectors are appropriately signed on the board. The pinout pitch is 2.54 mm (popular goldpin connectors). The module can be plugged into a contact board , connected using wires or soldered into a dedicated printed circuit board.
| Pin | Description |
|---|---|
| VIN | Input voltage. |
| GND | Mass potential. |
| VOUT | Output voltage. |
| ENABLE | Applying a low voltage state (below 0.6 V) causes the system to enter a low power state (approx. 20 μA). The pin is pulled up to the supply voltage via a 100 kΩ resistor, which makes the system switched on by default. |
Technical specification
- Input voltage: 10.5* V to 38 V
- Output voltage: 9V
- Output voltage accuracy: ±4% (range 8.64 V - 9.36 V)
- Maximum input current: depends on input voltage and load;
for 12 V VIN and 2.5 A VOUT is approx. 2.1 A - Efficiency of 85% to 95%
- Integrated protections: against short circuit, overheating, reverse voltage connection and soft-start function
- Two 2.2mm diameter mounting holes
- Dimensions: 17.8 x 17.8 x 9 mm
- Weight (without connectors): 2.6 g
*minimum value depends on drop-out voltage
D24V25F9 - step-down converter - 9 V 2.5 A. 
Efficiency of the system.System efficiency
Efficiency is defined as the ratio of output power to input power (Power out)/(Power in). This is a very important parameter when working with portable energy sources (batteries and accumulators), where the operating time on one charge cycle counts. The efficiency of this pulse system is about 85% to 95%.
Dropout voltage
The parameter is referred to in the documentation as drop-out voltage e to necessary for the proper operation of the system, minimum difference between input and output voltage. For example, if the drop-out is 1 V and the desired output voltage is 5 V, the supply voltage should be higher than 6 V. The figures below show the drop-out voltage for D24VxFx converters.
Dropout voltage. Useful links |
