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UC3842BD

HIGH PERFORMANCE CURRENT MODE CONTROLLERS

Partnumber Manufacturer Quantity Availability
UC3842BD 202 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE CONTROLLERS The UC3842BD is a high-performance current-mode PWM controller manufactured by Texas Instruments and other semiconductor companies.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (Vcc):** 16V (typical startup), 10V (UVLO turn-off)  
- **Operating Frequency:** Up to 500 kHz  
- **Output Duty Cycle:** 0% to 100% (adjustable)  
- **Output Current (Peak):** ±1A (sink/source)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Error Amplifier Gain Bandwidth:** 1 MHz  
- **Low Startup Current:** <1 mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin SOIC (D)  

### **Descriptions:**  
The UC3842BD is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and offline power supply applications. It features high current drive, precise duty cycle control, and cycle-by-cycle current limiting for robust power management.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Trimmed Oscillator Discharge Current:** Provides accurate frequency control.  
- **Latching PWM:** Prevents multiple pulses in a single cycle.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Reference:** 5V with tight tolerance for stable regulation.  

This information is based solely on the manufacturer's datasheet specifications.

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