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UC2843BN from STM,ST Microelectronics

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UC2843BN

Manufacturer: STM

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC2843BN STM 23950 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC2843BN is a high-performance current-mode PWM controller manufactured by STMicroelectronics (STM).  

### **Specifications:**  
- **Input Voltage Range:** 7.6V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Output Current (Source/Sink):** 1A (peak)  
- **Reference Voltage:** 5V (±1%)  
- **Error Amplifier Gain Bandwidth:** 1MHz  
- **Start-Up Current:** <1mA  
- **Undervoltage Lockout (UVLO):** On threshold: 8.4V (typ), Off threshold: 7.6V (typ)  
- **Package:** PDIP-8  

### **Descriptions:**  
The UC2843BN is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converters. It features current-mode control for improved loop stability and transient response. The device includes a precision voltage reference, error amplifier, oscillator, PWM comparator, and high-current totem-pole output.  

### **Features:**  
- **Current-Mode Operation:** Provides inherent line feedforward, cycle-by-cycle current limiting, and simplified loop compensation.  
- **Automatic Feedforward Compensation:** Ensures consistent response over varying input voltages.  
- **Latching PWM:** Prevents multiple pulses during fault conditions.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation only within the specified voltage range.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs with minimal external components.  

This information is based on the manufacturer's datasheet for the UC2843BN.

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