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UC3842D8 from UNITRODE

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UC3842D8

Manufacturer: UNITRODE

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3842D8 UNITRODE 20 In Stock

Description and Introduction

Current-Mode PWM Controller The UC3842D8 is a high-performance current-mode PWM controller manufactured by UNITRODE. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Low Startup Current:** <1mA  
- **Undervoltage Lockout (UVLO):**  
  - Turn-on: 16V (typical)  
  - Turn-off: 10V (typical)  
- **Package:** SOIC-8  

### **Descriptions:**  
- The UC3842D8 is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Includes a trimmed oscillator for precise duty cycle control, a temperature-compensated reference, and high-current totem-pole output.  

### **Features:**  
- **Current-Mode Operation:** Enhances line and load regulation.  
- **Automatic Feed-Forward Compensation:** Improves input voltage response.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Latching PWM for Cycle-by-Cycle Limiting:** Prevents multiple pulses during fault conditions.  
- **Internal Trimmed Bandgap Reference:** Ensures stable 5V output.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  

This information is based on UNITRODE's official datasheet for the UC3842D8.

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