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UC3845BN from MOT,Motorola

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UC3845BN

Manufacturer: MOT

High performance current mode PWM controller

Partnumber Manufacturer Quantity Availability
UC3845BN MOT 7423 In Stock

Description and Introduction

High performance current mode PWM controller The UC3845BN is a high-performance current-mode PWM controller manufactured by Motorola (MOT).  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Operating Frequency:** Up to 500 kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Input Voltage (VCC):** 8.4V to 30V (start-up voltage ~16V)  
- **Output Current (Peak):** ±1A (source/sink)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Low Power Consumption:** Typically 11mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions & Features:**  
- **Precision Current Sensing:** Provides cycle-by-cycle current limiting.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Soft-Start Capability:** Reduces inrush current.  
- **Adjustable Oscillator Frequency:** Set via external RC components.  
- **Error Amplifier:** High-gain, internally compensated for feedback control.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Single-Ended Output:** Directly drives power MOSFETs or IGBTs.  

The UC3845BN is widely used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

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