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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).

Application Scenarios & Design Considerations

High Performance Current Mode Controller
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.

Application Scenarios & Design Considerations

High Performance Current Mode Controller

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