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TL3842P from TI,Texas Instruments

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TL3842P

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
TL3842P TI 2000 In Stock

Description and Introduction

Current-Mode PWM Controller The TL3842P is a current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features:  

### **Specifications:**  
- **Input Voltage Range (VCC):** 8V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Reference Voltage (VREF):** 5V ±1%  
- **Maximum Output Current (Gate Drive):** 1A (peak)  
- **Quiescent Current:** 15mA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
The TL3842P is a high-performance fixed-frequency current-mode PWM controller designed for DC-DC converter applications. It provides precise control for power supplies with features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for accurate frequency control.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Trimmed Oscillator:** Provides accurate frequency control with external timing components.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier:** Features wide bandwidth for improved transient response.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  

The TL3842P is commonly used in offline and DC-DC power supplies, battery chargers, and other power conversion applications.  

Would you like additional details on any specific aspect?

Application Scenarios & Design Considerations

Current-Mode PWM Controller

Alternative Part Number

  • UC3842AN --: Industry-standard current-mode PWM controller in the same family with identical pinout and function, widely available and directly interchangeable in most 3842 applications.
  • SG3842N --: Second-source 3842 controller with equivalent electrical characteristics and DIP-8 pinout, suitable as a drop-in replacement when TI parts are unavailable.
  • KA3842A --: Well-known 3842A variant offering the same current-mode control function and pin configuration, commonly used as a cross-reference for TL3842P.

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