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UC2847N from TI,Texas Instruments

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UC2847N

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2847N TI 26 In Stock

Description and Introduction

Current Mode PWM Controller The UC2847N is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range (VCC):** 8.4V to 30V (operating), up to 36V (absolute max)  
- **Output Current (Peak):** ±1A (source/sink)  
- **Switching Frequency:** Adjustable up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
- The UC2847N 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 undervoltage lockout (UVLO) protection with hysteresis for reliable startup.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop compensation.  
- **Programmable Oscillator:** Adjustable frequency via external resistor and capacitor.  
- **Precision Reference:** 5V (±1%) for stable regulation.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within safe voltage limits.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs with ±1A peak current.  
- **Soft-Start Capability:** Reduces startup stress on components.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  

The UC2847N is commonly used in offline and DC-DC converters, power supplies, and battery chargers.  

(Source: Texas Instruments Datasheet)

Partnumber Manufacturer Quantity Availability
UC2847N UNITRODE 28 In Stock

Description and Introduction

Current Mode PWM Controller The UC2847N is a high-performance current-mode PWM controller manufactured by UNITRODE.  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1 A (peak)  
- **Input Voltage Range:** 8.5V to 30V (start-up), 7.6V to 30V (operating)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Current Sense Comparator:** Adjustable threshold with leading-edge blanking  
- **Soft-Start:** Adjustable  
- **Error Amplifier:** High-gain bandwidth (1 MHz typical)  
- **Protection Features:** Under-voltage lockout (UVLO), cycle-by-cycle current limiting  

### **Descriptions and Features:**  
- Designed for offline and DC-DC converter applications.  
- Provides precise duty cycle control with current-mode operation for improved loop response.  
- Includes a trimmed oscillator for accurate frequency control.  
- Features a totem-pole output stage for direct MOSFET drive.  
- Integrated under-voltage lockout (UVLO) ensures reliable start-up and shutdown.  
- Leading-edge blanking improves noise immunity in current sensing.  
- Available in an 8-pin PDIP and SOIC package.  

This information is based on UNITRODE's official datasheet for the UC2847N.

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