Details

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BUY UC3625QTR https://www.utsource.net/itm/p/12612249.html

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	Vcc	4.5	-	16	V
Output Voltage Range	Vout	0	-	5.5	V
Quiescent Current	Iq	-	2.5	-	mA
Shutdown Current	Isd	-	1	-	μA
Oscillator Frequency	fosc	100	-	500	kHz
Duty Cycle Range	D	0	-	100	%
Reference Voltage	Vref	1.23	-	1.27	V
Error Amplifier Gain	Aea	-	100	-	V/μV
Compensation Pin Current	Ic	-	10	-	nA
Operating Temperature	Topr	-40	-	125	°C
Storage Temperature	Tstg	-65	-	150	°C

Instructions for Using UC3625QTR

1. Supply Voltage (Vcc):

   • Ensure the supply voltage is within the range of 4.5V to 16V.
   • Connect the Vcc pin to the positive terminal of your power supply.

2. Output Voltage (Vout):

   • The output voltage can be adjusted from 0V to 5.5V using external components such as resistors and capacitors.
   • Use the feedback (FB) pin to set the desired output voltage.

3. Quiescent Current (Iq):

   • The quiescent current is typically 2.5mA. This is the current consumed by the IC when it is active but not driving any load.

4. Shutdown Current (Isd):

   • When the shutdown (SD) pin is pulled low, the IC enters a low-power mode with a typical shutdown current of 1μA.

5. Oscillator Frequency (fosc):

   • Set the oscillator frequency between 100kHz and 500kHz using an external resistor and capacitor connected to the RT/CT pins.

6. Duty Cycle Range (D):

   • The duty cycle can be adjusted from 0% to 100% using the PWM input or internal control logic.

7. Reference Voltage (Vref):

   • The reference voltage is typically 1.25V (1.23V to 1.27V). Use this voltage for setting the output voltage through the feedback network.

8. Error Amplifier Gain (Aea):

   • The error amplifier gain is typically 100V/μV. This high gain ensures precise regulation of the output voltage.

9. Compensation Pin Current (Ic):

   • The compensation pin current is typically 10nA. Use this information to design the compensation network for stability.

10. Operating Temperature (Topr):

    • The IC operates reliably over a temperature range of -40°C to 125°C.

11. Storage Temperature (Tstg):

    • Store the IC in an environment where the temperature ranges from -65°C to 150°C.

12. Layout Considerations:

    • Keep the power and ground traces short and wide to minimize noise and improve thermal performance.
    • Place bypass capacitors close to the Vcc and GND pins to filter out high-frequency noise.

13. Thermal Management:

    • If operating at high power levels, ensure adequate heat sinking to keep the IC within its operating temperature range.

14. Testing and Debugging:

    • Use an oscilloscope to monitor the output voltage and other key signals to ensure proper operation.
    • Check the supply voltage and current consumption to verify that the IC is functioning correctly.

(For reference only)