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UC2842AM from LINFINITY

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UC2842AM

Manufacturer: LINFINITY

CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC2842AM LINFINITY 250 In Stock

Description and Introduction

CURRENT MODE PWM CONTROLLER The UC2842AM is a pulse width modulation (PWM) controller IC manufactured by LINFINITY. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** LINFINITY  
- **Type:** Current Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 500 kHz  
- **Output Current:** ±1A (Peak)  
- **Supply Voltage (Vcc):** 8V to 30V  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin SOIC  

### **Descriptions:**
The UC2842AM is a high-performance current-mode PWM controller designed for offline and DC-DC converter applications. It provides precise voltage regulation with features like adjustable frequency, soft-start capability, and cycle-by-cycle current limiting.  

### **Features:**
- **Current-Mode Control:** Enhances loop response and simplifies compensation.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Programmable Oscillator:** Allows frequency adjustment via external components.  
- **Error Amplifier:** High-gain bandwidth for accurate feedback control.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Totem Pole Output:** Directly drives power MOSFETs.  

This IC is commonly used in switch-mode power supplies (SMPS), battery chargers, and industrial power systems.

Partnumber Manufacturer Quantity Availability
UC2842AM UC 26 In Stock

Description and Introduction

CURRENT MODE PWM CONTROLLER The UC2842AM is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
- **Texas Instruments**  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range (VCC):** 8.4V to 30V (start-up voltage: 16V typical)  
- **Operating Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V ±1%  
- **Error Amplifier Gain Bandwidth:** 1MHz (typical)  
- **Low Startup Current:** <1mA  
- **UVLO (Undervoltage Lockout):** On: 16V (typical), Off: 10V (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin SOIC (Small Outline Integrated Circuit)  

### **Descriptions:**  
- The UC2842AM is designed for offline and DC-DC converter applications.  
- It features a trimmed oscillator for precise duty cycle control.  
- Includes a high-gain error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.  
- Provides cycle-by-cycle current limiting for improved reliability.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Pulse-by-Pulse Current Limiting:** Prevents transformer saturation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Trimmed Oscillator Discharge Current:** Tightens frequency control.  
- **Latching PWM for Single Pulse Metering:** Improves noise immunity.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  

For detailed electrical characteristics and application notes, refer to the official Texas Instruments datasheet.

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