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UC2847DW from UNITRODE

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UC2847DW

Manufacturer: UNITRODE

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2847DW UNITRODE 45 In Stock

Description and Introduction

Current Mode PWM Controller The UC2847DW is a PWM controller IC manufactured by UNITRODE. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** UNITRODE  
- **Package:** SOIC-16 (DW suffix)  
- **Type:** Current Mode PWM Controller  
- **Operating Frequency:** Up to 500 kHz  
- **Output Current:** ±1 A (peak)  
- **Supply Voltage (VCC):** 8.6V to 30V  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Start-Up Current:** <1 mA  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The UC2847DW is a high-performance fixed-frequency current-mode PWM controller designed for offline and DC-DC converter applications. It provides precise duty cycle control with high noise immunity and includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a programmable oscillator.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Programmable Soft-Start:** Reduces inrush current.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Trimmed Bandgap Reference:** Provides stable voltage regulation.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **500 kHz Operation:** Suitable for high-frequency designs.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Current Mode PWM Controller
Partnumber Manufacturer Quantity Availability
UC2847DW TI/BB 50 In Stock

Description and Introduction

Current Mode PWM Controller The UC2847DW is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI) and Burr-Brown (BB).  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Input Voltage Range (VCC):** 8.5V to 30V  
- **Operating Frequency:** Up to 500 kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Output Current (Peak):** ±1A  
- **Reference Voltage (VREF):** 5V ±1%  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Start-Up Current:** <1 mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-16 (DW)  

### **Descriptions:**  
The UC2847DW is designed for off-line and DC-to-DC converter applications. It provides precise duty cycle control with current-mode operation, improving loop response and simplifying compensation. The device includes features such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for accurate frequency control.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop compensation.  
- **Programmable Oscillator:** Allows flexible frequency setting with external components.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable start-up and shutdown.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Trimmed Bandgap Reference:** Provides stable 5V reference.  
- **Low Power Consumption:** Optimized for efficiency.  

The UC2847DW is commonly used in power supplies, battery chargers, and industrial applications requiring robust PWM control.

Application Scenarios & Design Considerations

Current Mode PWM Controller
Partnumber Manufacturer Quantity Availability
UC2847DW TI 1900 In Stock

Description and Introduction

Current Mode PWM Controller The UC2847DW is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range (VCC):** 8.5V to 30V (operating), up to 40V (absolute max)  
- **Output Current (Gate Drive):** ±1A peak  
- **Switching Frequency:** Up to 500kHz (adjustable with external components)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1MHz  
- **Soft-Start Capability:** Adjustable  
- **Undervoltage Lockout (UVLO):** 8.2V (on), 7.6V (off)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-16 (DW)  

### **Descriptions:**  
The UC2847DW is designed for high-efficiency power supply applications, offering precise regulation and robust protection features. It includes an integrated error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Programmable Oscillator:** Adjustable frequency with external resistor and capacitor.  
- **Error Amplifier:** High-gain, wide-bandwidth for accurate feedback control.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Sync Capability:** Allows synchronization with external clock signals.  
- **Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.  
- **Totem-Pole Output:** High-current gate drive for fast MOSFET switching.  

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

Application Scenarios & Design Considerations

Current Mode PWM Controller

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