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MAN4940A from QT

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MAN4940A

Manufacturer: QT, Fairchild/

0.400-INCH SEVEN SEGMENT DISPLAYS

Partnumber Manufacturer Quantity Availability
MAN4940A QT, Fairchild/ 483 In Stock

Description and Introduction

0.400-INCH SEVEN SEGMENT DISPLAYS The MAN4940A is a monolithic integrated circuit manufactured by Fairchild Semiconductor. Below are the specifications, descriptions, and features based on the available knowledge base:

### **Specifications:**  
- **Manufacturer:** Fairchild Semiconductor  
- **Type:** PWM (Pulse Width Modulation) Controller  
- **Operating Voltage Range:** Typically 5V to 40V  
- **Output Current:** Capable of driving external power transistors (exact current handling depends on external components)  
- **Frequency Range:** Adjustable via external components (typical range in kHz)  
- **Duty Cycle Range:** Adjustable (typically 0% to 100%)  
- **Package Type:** Likely available in DIP (Dual In-line Package) or SOIC (Small Outline IC)  

### **Descriptions:**  
The MAN4940A is a PWM controller IC designed for power supply and motor control applications. It provides precise control over pulse width modulation signals, making it suitable for switching regulators, DC-DC converters, and other power management systems. The device includes internal error amplifiers, a sawtooth oscillator, and output drivers to facilitate efficient power control.  

### **Features:**  
- Adjustable PWM frequency via external resistor and capacitor  
- Internal error amplifier for feedback control  
- Soft-start capability to reduce inrush current  
- Under-voltage lockout (UVLO) protection  
- High output drive capability for external power transistors  
- Thermal shutdown protection  

For exact electrical characteristics and application details, refer to the official Fairchild datasheet.

Application Scenarios & Design Considerations

0.400-INCH SEVEN SEGMENT DISPLAYS

Alternative Part Number

  • LTS-4940A --: Same 0.4-inch single-digit seven-segment display format with common cathode, pin-compatible and widely available.
  • HDSP-5501 --: Equivalent 0.4-inch red seven-segment display with similar electrical ratings and pinout.
  • SA40-19SRWA --: 0.4-inch single-digit seven-segment display with comparable forward voltage and brightness, suitable drop-in replacement.
  • HDSP-3900 --: Common-cathode 7-segment LED display in the same 0.4-inch class, widely available and electrically similar to the original MAN4940A.
  • LTS-4801JR --: 0.4-inch single-digit 7-segment LED display with comparable forward voltage and current ratings, suitable drop-in replacement.

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