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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.

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.

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