Details

---

BUY UC2845BDG https://www.utsource.net/itm/p/12612120.html

Parameter	Description	Value
Device Type	High Performance Current Mode PWM Controller	UC2845BDG
Package Type	SOIC-8
Operating Voltage (Vcc)	Input Supply Voltage Range	10 V to 40 V
Switching Frequency	Adjustable Switching Frequency	Up to 500 kHz
Reference Voltage	Internal Reference Voltage	5.0 V 卤 1%
Start-Up Current	Start-Up Current	1 mA
Operating Temperature	Junction Temperature Range	-40掳C to +125掳C
Supply Current	Quiescent Supply Current	7 mA
Output Current Limit	Output Current Limit	1 A
Duty Cycle Range	Maximum Duty Cycle	99%
Error Amplifier Gain	Error Amplifier Transconductance	100 渭A/V
PWM Comparator	Slope Compensation and Leading Edge Blanking	Integrated

Instructions for Use:

1. Power Supply Connection: Connect the input supply voltage (Vcc) within the specified range of 10 V to 40 V.
2. Frequency Adjustment: Use an external resistor to set the desired switching frequency up to 500 kHz.
3. Current Sensing: Implement a current sensing resistor in series with the power switch to monitor output current.
4. Thermal Management: Ensure adequate heat dissipation as per the operating temperature range (-40掳C to +125掳C).
5. Feedback Loop: Configure the feedback loop using the error amplifier to maintain regulation accuracy.
6. Protection Circuits: Utilize the internal protection features like overcurrent protection and thermal shutdown.
7. Layout Considerations: Follow good PCB layout practices to minimize noise and ensure stable operation.

For detailed design considerations and application circuits, refer to the device datasheet.

(For reference only)