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UC3843AD8TRG4 from TI,Texas Instruments

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UC3843AD8TRG4

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3843AD8TRG4 TI 5000 In Stock

Description and Introduction

Current Mode PWM Controller The UC3843AD8TRG4 is a current-mode PWM controller manufactured by Texas Instruments (TI). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** Texas Instruments (TI)  
- **Part Number:** UC3843AD8TRG4  
- **Package:** SOIC-8  
- **Type:** Current-Mode PWM Controller  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Output Voltage:** Adjustable via external components  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Output Current (Gate Drive):** ±1A (peak)  
- **Reference Voltage (VREF):** 5V ±1%  
- **UVLO (Undervoltage Lockout):** On: 8.4V (typ), Off: 7.6V (typ)  
- **Current Sense Input Voltage:** -0.3V to +1V  

### **Descriptions:**  
The UC3843AD8TRG4 is a high-performance fixed-frequency current-mode PWM controller designed for DC-DC converter and offline power supply applications. It provides precise duty cycle control with low startup current and features an integrated oscillator, error amplifier, and current-sensing comparator.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Latching PWM:** Ensures cycle-by-cycle current limiting.  
- **Undervoltage Lockout (UVLO):** Ensures reliable startup and shutdown.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Trimmed Bandgap Reference:** Provides stable 5V reference.  
- **Low Startup Current (≤ 1mA):** Reduces power consumption.  
- **Programmable Oscillator Frequency:** Adjustable via external resistor and capacitor.  
- **Error Amplifier with High Gain-Bandwidth Product:** Ensures stable feedback control.  

These details are based solely on the manufacturer's specifications.

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