Details

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BUY BD9890F https://www.utsource.net/itm/p/12609821.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	4.5	-	28	V
Output Voltage	VOUT	Adjustable	0.8	-	18	V
Output Current	IOUT	Continuous	-	3	5	A
Switching Frequency	fSW	Fixed	-	2.2	-	MHz
Quiescent Current	IQ	No Load	-	60	-	渭A
Shutdown Current	ISD	VIN = 24V, EN = Low	-	0.1	-	渭A
Efficiency	畏	VIN = 12V, VOUT = 5V, IOUT = 1A	-	92	-	%

Instructions for BD9890F

1. Power Supply Connection:

   • Connect the input voltage (VIN) to the power supply within the operating range of 4.5V to 28V.
   • Ensure proper decoupling capacitors are placed close to the input and output pins to maintain stability.

2. Output Voltage Setting:

   • Adjust the output voltage using an external resistor network connected to the feedback pin (FB). Refer to the datasheet for specific resistor values based on desired output voltage.

3. Switching Frequency:

   • The switching frequency is fixed at 2.2 MHz. For applications requiring a different frequency, consider using a different device or consult the manufacturer.

4. Thermal Considerations:

   • Ensure adequate heat dissipation by providing a suitable heatsink if operating at high output currents or in high ambient temperatures.

5. Enable Pin (EN):

   • Use the enable pin to control the operation of the device. Applying a low signal to this pin will shut down the regulator, reducing the current consumption to approximately 0.1 渭A.

6. Protection Features:

   • The BD9890F includes overcurrent protection and thermal shutdown to safeguard against faults. Verify these features meet your application requirements.

7. Layout Recommendations:

   • Follow recommended PCB layout guidelines to minimize noise and parasitic effects, ensuring optimal performance and reliability.

For detailed specifications and further information, refer to the official datasheet provided by ROHM Semiconductor.

(For reference only)