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UC3844BD1R2 from MOTOR0LA

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UC3844BD1R2

Manufacturer: MOTOR0LA

High Performance Current Mode Controller

Partnumber Manufacturer Quantity Availability
UC3844BD1R2 MOTOR0LA 100 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3844BD1R2 is a high-performance current-mode PWM controller manufactured by Motorola (now part of ON Semiconductor). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage (VCC):** 8V to 30V  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 50% (adjustable)  
- **Reference Voltage (VREF):** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
- The UC3844BD1R2 is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and power supply applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Includes an under-voltage lockout (UVLO) feature to ensure proper startup and shutdown.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop stabilization.  
- **Precision Reference:** Internal 5V bandgap reference with ±1% accuracy.  
- **Adjustable Oscillator:** External RC components set switching frequency.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the input voltage range.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Totem Pole Output:** High-current gate drive for power MOSFETs.  

This information is based on the official datasheet from Motorola (now ON Semiconductor).

Partnumber Manufacturer Quantity Availability
UC3844BD1R2 ON 1899 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3844BD1R2 is a current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** Adjustable up to 50%  
- **Output Current (Source/Sink):** 1A (peak)  
- **Reference Voltage:** 5V (±1%)  
- **Error Amplifier Bandwidth:** 1MHz  
- **Undervoltage Lockout (UVLO):** 8.4V (on) / 7.6V (off)  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3844BD1R2 is designed for DC-DC converter applications, providing precise control for switching power supplies. It features a fixed-frequency oscillator, cycle-by-cycle current limiting, and a totem-pole output stage for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Internal Trimmed Reference:** 5V with ±1% accuracy.  
- **High-Current Totem-Pole Output:** Directly drives MOSFETs.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Low Start-Up Current:** Typically <1mA.  

This device is commonly used in offline and DC-DC converters, power supplies, and battery chargers.

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