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UC2844B from ST,ST Microelectronics

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15.625ms

UC2844B

Manufacturer: ST

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC2844B ST 27 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC2844B is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Specifications:**  
- **Manufacturer:** STMicroelectronics (ST)  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1 A (Peak)  
- **Supply Voltage (VCC):** 8.5 V to 30 V  
- **Start-Up Current:** < 1 mA  
- **Duty Cycle Range:** 0% to 50% (adjustable)  
- **Error Amplifier Bandwidth:** 3 MHz  
- **Reference Voltage Accuracy:** ±1% (5V)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Options:** PDIP-8, SO-8  

### **Descriptions:**  
The UC2844B is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC power supplies. It features current-mode control for improved loop response and includes built-in protections such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a latch for single-pulse metering.  

### **Features:**  
- **Current-Mode Operation:** Provides inherent line feedforward, cycle-by-cycle current limiting, and simplified loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves input voltage regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable start-up and shutdown.  
- **Trimmed Oscillator Discharge Current:** Allows precise duty cycle control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Soft-Start:** Reduces inrush current during start-up.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Latching PWM for Single-Pulse Metering:** Prevents multiple pulses during fault conditions.  

This information is based solely on the manufacturer's datasheet for the UC2844B from STMicroelectronics.

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