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UC2843AQ from UNITRODE

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UC2843AQ

Manufacturer: UNITRODE

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2843AQ UNITRODE 86 In Stock

Description and Introduction

Current Mode PWM Controller The UC2843AQ is a high-performance current-mode PWM controller manufactured by UNITRODE. Below are the specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Input Voltage Range:** 8.5V to 30V (start-up), 7.6V to 30V (operating)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions:**  
- The UC2843AQ is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC power supplies.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a programmable oscillator.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop stabilization.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable start-up and shutdown.  
- **Trimmed Oscillator Discharge Current:** Provides precise duty cycle control.  
- **High-Current Totem Pole Output:** Suitable for driving power MOSFETs directly.  
- **Internal Soft-Start:** Reduces inrush current during start-up.  
- **Low Start-Up Current:** Typically 0.5mA.  

This information is strictly based on UNITRODE's datasheet for the UC2843AQ.

Application Scenarios & Design Considerations

Current Mode PWM Controller
Partnumber Manufacturer Quantity Availability
UC2843AQ TI 2940 In Stock

Description and Introduction

Current Mode PWM Controller The UC2843AQ is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Input Voltage Range (VCC):** 8V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current (Peak):** ±1A  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V ±1%  
- **Start-Up Current:** <1mA  
- **Undervoltage Lockout (UVLO):**  
  - Turn-On: 16V (Typical)  
  - Turn-Off: 10V (Typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Description:**  
The UC2843AQ is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC power supplies. It operates in current-mode control, providing improved loop response and simplified compensation. The device includes features such as cycle-by-cycle current limiting, undervoltage lockout (UVLO), and a trimmed bandgap reference for precise regulation.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Trimmed Oscillator Discharge Current:** Ensures precise duty cycle control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Undervoltage Lockout (UVLO):** Ensures reliable start-up and shutdown.  
- **Internal Soft-Start:** Reduces inrush current during start-up.  
- **Low Power Consumption:** Suitable for energy-efficient designs.  

This information is based on TI's official datasheet for the UC2843AQ.

Application Scenarios & Design Considerations

Current Mode PWM Controller

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