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UC1845AJ from TI,Texas Instruments

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15.625ms

UC1845AJ

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC1845AJ TI 1921 In Stock

Description and Introduction

Current Mode PWM Controller The UC1845AJ is a pulse width modulation (PWM) controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)  
- **Type:** Current Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** 1A (peak)  
- **Supply Voltage (VCC):** 8.2V to 30V  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 3 MHz  
- **Start-Up Current:** 0.5 mA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**
The UC1845AJ is a high-performance fixed-frequency current-mode PWM controller designed for switching power supply applications. It provides precise regulation and protection features, making it suitable for a variety of power conversion topologies.  

### **Features:**
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Internal Trimmed Bandgap Reference:** Provides stable voltage regulation.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **Synchronizable Oscillator:** Allows synchronization with external clock signals.  

This information is based solely on the technical specifications of the UC1845AJ from Texas Instruments.

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