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UC3844AD from ST,ST Microelectronics

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UC3844AD

Manufacturer: ST

Current Mode PWMs

Partnumber Manufacturer Quantity Availability
UC3844AD ST 17 In Stock

Description and Introduction

Current Mode PWMs The UC3844AD 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  
- **Type:** Current-Mode PWM Controller  
- **Package:** SOIC-8  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Output Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Output Drive Current:** ±1A (peak)  
- **Reference Voltage:** 5V (±1%)  
- **Low Startup Current:** <1mA  
- **UVLO (Undervoltage Lockout):** 8.4V (on), 7.6V (off)  

### **Descriptions:**  
- The UC3844AD is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converters.  
- It features current-mode control for improved loop response and simplified compensation.  
- Includes a built-in oscillator, error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.  
- Designed for offline and DC-DC power supply applications.  

### **Features:**  
- **Current-Mode Operation:** Provides cycle-by-cycle current limiting.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Internal Trimmed Reference:** 5V with ±1% accuracy.  
- **High-Current Totem-Pole Output:** Suitable for driving MOSFETs directly.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Low Startup and Operating Current:** Reduces power consumption.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

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