Details

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BUY FAN7930BMX https://www.utsource.net/itm/p/1889399.html
Critical Conduction Mode PFC Controller

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	VIN	4.5	-	20	V	Supply voltage range
Output Voltage	VOUT	-	3.3	-	V	Regulated output voltage
Quiescent Current	IQ	-	10	-	μA	Supply current in active mode
Shutdown Current	ISD	-	0.1	-	μA	Supply current in shutdown mode
Load Current	IOUT	-	300	-	mA	Maximum continuous output current
Dropout Voltage	VDROPOUT	-	200	-	mV	Voltage difference between VIN and VOUT at IOUT
Operating Temperature	TOPR	-40	-	85	°C	Ambient operating temperature range
Storage Temperature	TSTG	-65	-	150	°C	Temperature range for storage
Thermal Resistance (θJA)	θJA	-	120	-	°C/W	Junction-to-ambient thermal resistance

Instructions for Using FAN7930BMX

1. Supply Voltage (VIN):

   • Ensure the input voltage is within the specified range of 4.5V to 20V.
   • Use appropriate decoupling capacitors (typically 10μF and 0.1μF) close to the VIN pin to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The FAN7930BMX provides a regulated output voltage of 3.3V.
   • For applications requiring a different output voltage, refer to the datasheet for external resistor configurations.

3. Load Current (IOUT):

   • The device can support up to 300mA of continuous output current.
   • For higher current requirements, consider using external transistors or a different regulator.

4. Quiescent and Shutdown Current:

   • The quiescent current is typically 10μA, which is important for low-power applications.
   • To reduce power consumption, use the shutdown feature by pulling the SHDN pin low, which reduces the supply current to 0.1μA.

5. Dropout Voltage:

   • The dropout voltage is typically 200mV, meaning the input voltage should be at least 200mV higher than the output voltage to maintain regulation.

6. Operating and Storage Temperature:

   • The device operates within a temperature range of -40°C to 85°C.
   • Store the device in an environment with a temperature range of -65°C to 150°C.

7. Thermal Management:

   • The thermal resistance (θJA) is 120°C/W. Ensure proper heat dissipation if the device will operate at high load currents or in high ambient temperatures.

8. PCB Layout:

   • Place the FAN7930BMX close to the load to minimize trace inductance.
   • Use wide and short traces for power and ground connections to reduce parasitic inductance and resistance.

9. Capacitors:

   • Use ceramic capacitors for decoupling due to their low ESR and high frequency performance.
   • Ensure the capacitors have a sufficient voltage rating and are rated for the operating temperature range.

10. Testing and Debugging:

    • Before finalizing the design, test the circuit under various load conditions and input voltages.
    • Monitor the output voltage and temperature to ensure stable operation and compliance with specifications.

(For reference only)