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TL3843 from TI,Texas Instruments

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TL3843

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
TL3843 TI 58 In Stock

Description and Introduction

Current-Mode PWM Controller The TL3843 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 8.5V to 30V (operating)  
- **Reference Voltage:** 5V (with ±1% tolerance)  
- **Switching Frequency:** Up to 500 kHz (adjustable with external components)  
- **Output Duty Cycle:** 0% to 100% (maximum)  
- **Peak Output Current:** ±1A (source/sink)  
- **Error Amplifier Bandwidth:** 1 MHz (typical)  
- **Operating Temperature Range:** -40°C to +85°C (industrial)  
- **Package Options:** 8-pin PDIP, SOIC  

### **Descriptions:**  
- The TL3843 is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Includes an undervoltage lockout (UVLO) feature to ensure reliable startup and shutdown.  
- Suitable for offline and DC-DC power supplies, including flyback, forward, and boost converters.  

### **Features:**  
- **Current-Mode Control:** Enhances line and load regulation.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Internal Trimmed Bandgap Reference:** Provides stable 5V reference.  
- **Low Startup Current:** Typically 0.5 mA for efficient power-up.  

For detailed application-specific information, refer to the official TI datasheet.

Application Scenarios & Design Considerations

Current-Mode PWM Controller
Partnumber Manufacturer Quantity Availability
TL3843 TEXAS 23 In Stock

Description and Introduction

Current-Mode PWM Controller The TL3843 is a PWM controller IC manufactured by Texas Instruments (TEXAS). Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Input Voltage Range:** 7V to 30V  
- **Operating Frequency Range:** Up to 500 kHz  
- **Output Duty Cycle Range:** 0% to 100%  
- **Output Current (Source/Sink):** 200 mA (peak)  
- **Reference Voltage:** 5V ±1%  
- **Error Amplifier Gain Bandwidth:** 1 MHz  
- **Start-Up Current:** 1 mA (typical)  
- **Operating Temperature Range:** -40°C to +85°C (Industrial)  
- **Package Options:** PDIP-8, SOIC-8  

### **Descriptions:**  
- The TL3843 is a fixed-frequency current-mode PWM controller.  
- It is designed for DC-DC converter applications, including offline and isolated power supplies.  
- The device features an oscillator, error amplifier, current sensing comparator, and a high-current totem-pole output.  
- It includes undervoltage lockout (UVLO) with hysteresis for reliable start-up.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Internal Trimmed Reference:** Provides stable 5V reference voltage.  
- **Low Start-Up and Operating Current:** Improves efficiency.  

This information is based on the manufacturer's datasheet for the TL3843.

Application Scenarios & Design Considerations

Current-Mode PWM Controller

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