UC2903DWTR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance PWM Controller
• Package: SOIC-16
• Essence: Regulates and controls power delivery in various applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 7V to 40V
• Output Voltage Range: 5V to 35V
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to +85°C
• Switching Frequency: 50kHz to 500kHz
• Output Current: Up to 1A

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. COMP: Compensation pin for loop stability
4. FB: Feedback voltage input
5. CS: Current sense input
6. RT/CT: Timing components connection
7. CT: Timing capacitor connection
8. RT: Timing resistor connection
9. OSC: Oscillator timing capacitor connection
10. SYNC: Synchronization input
11. SS/TR: Soft-start/tracking pin
12. OUT: Power switch output
13. DRV: Gate driver output
14. NC: No connection
15. NC: No connection
16. VREF: Reference voltage output

Functional Features

• High-efficiency operation
• Adjustable output voltage
• Overcurrent protection
• Undervoltage lockout
• Soft-start capability
• Synchronization capability
• Error amplifier for precise regulation
• Thermal shutdown protection

Advantages and Disadvantages

Advantages: - Wide input voltage range - High switching frequency - Compact package size - Comprehensive protection features

Disadvantages: - Limited output current capacity - Requires external timing components

Working Principles

The UC2903DWTR is a high-performance PWM controller designed for power management applications. It operates by regulating the duty cycle of the power switch to control the output voltage. The input voltage is converted into a regulated output voltage through a feedback loop that compares the actual output voltage with a reference voltage. The error amplifier adjusts the duty cycle based on this comparison, ensuring precise regulation.

Detailed Application Field Plans

The UC2903DWTR is commonly used in various power management applications, including: - DC-DC converters - Voltage regulators - Battery chargers - LED drivers - Motor control circuits

Detailed and Complete Alternative Models

1. UC3903DWTR: Similar specifications and features, but with higher output current capacity (up to 2A).
2. UC1903DWTR: Lower-cost alternative with reduced functionality and lower output current capacity (up to 500mA).
3. UC5903DWTR: Enhanced version with additional protection features and wider operating temperature range.

Note: Please refer to the manufacturer's datasheet for complete information on alternative models.

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