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UC3844D8 from TI&BB,Texas Instruments

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15.625ms

UC3844D8

Manufacturer: TI&BB

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3844D8 TI&BB 1 In Stock

Description and Introduction

Current-Mode PWM Controller The UC3844D8 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI) and Burr-Brown (BB).  

### **Specifications:**  
- **Input Voltage Range:** 8.4V to 30V  
- **Output Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Output Current (Source/Sink):** 1A (peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin SOIC (D8)  

### **Descriptions:**  
The UC3844D8 is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications. It features current-mode control for improved loop response and includes a built-in oscillator, error amplifier, and high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control** for simplified loop compensation  
- **Automatic Feed-Forward Compensation** for improved line regulation  
- **Latching PWM** for cycle-by-cycle current limiting  
- **Undervoltage Lockout (UVLO)** with hysteresis  
- **Internal Trimmed Bandgap Reference** (5V ±1%)  
- **High-Current Totem-Pole Output** (1A peak)  
- **Low Start-Up Current** (<1mA)  

This device is commonly used in switch-mode power supplies (SMPS), battery chargers, and offline converters.

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