The UC3843 is a current-mode pulse-width modulation (PWM) controller designed for use in switching power supplies. It provides a complete solution for high-performance and efficient DC-DC conversion. The IC features a high-speed comparator, a precision reference, and a totem pole output stage. The UC3843 is housed in a compact SOP-14 SMD package, making it suitable for space-constrained applications.

Specifications:

• IC Type: Current-Mode PWM Controller
• Package Type: SOP-14 SMD
• Operating Voltage Range: 8 V to 20 V
• Output Voltage Range: 5 V
• Frequency Range: Up to 100 kHz
• Start-Up Current: 1.5 mA
• Quiescent Current: 5 mA
• Switching Frequency: 100 kHz typical
• Temperature Range: -40°C to +85°C
• Brand: On Semiconductors

Pin Configuration:

1. VCC: Supply Voltage
2. GND: Ground
3. CSN: Current Sense Negative
4. CSP: Current Sense Positive
5. RT: Timing Resistor
6. CT: Timing Capacitor
7. COMP: Compensation
8. DR: Drive
9. VREF: Reference Voltage
10. SW: Switch
11. SGND: Signal Ground
12. ISEN: Current Sense Input
13. INV: Inverting Input
14. NONINV: Non-Inverting Input

Features:

• Current-mode control: Provides improved performance in power conversion
• High-speed comparator: Ensures accurate pulse-width modulation
• Precision reference voltage: Maintains stable operation
• Totem pole output stage: Suitable for driving power MOSFETs
• Low start-up current: Efficient operation
• Compact SOP-14 package: Space-saving design

Applications:

• Switching power supplies
• DC-DC converters
• Power management circuits
• Battery-powered devices
• Power adapters and chargers
• Industrial power control systems

Package Includes:

1 x UC3843 Current-Mode PWM Controller 14 Pin IC (SOP-14 SMD Package)

Note: Product images are for illustrative purposes only and may differ from the actual product.