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UC2844AD from MSC

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UC2844AD

Manufacturer: MSC

Current Mode PWMs

Partnumber Manufacturer Quantity Availability
UC2844AD MSC 345 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by MSC (Microsemi Corporation).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1 A (peak)  
- **Supply Voltage Range:** 8V to 30V  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1% accuracy)  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides cycle-by-cycle current limiting for improved transient response.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation with built-in hysteresis.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Internal Trimmed Bandgap Reference:** Ensures stable voltage regulation.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Startup and Operating Current:** Improves efficiency.  

The UC2844AD is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD ST 3505 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are its specifications, descriptions, and features:  

### **Specifications:**  
- **Manufacturer:** STMicroelectronics  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Output Configuration:** Single-Ended  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Max:** 50%  
- **Supply Voltage (Vcc):** 8.5V to 30V  
- **Start-Up Voltage:** 16V (typical)  
- **UVLO (Under-Voltage Lockout):** On Threshold: 16V (typ), Off Threshold: 10V (typ)  
- **Output Current (Source/Sink):** 1A (peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC2844AD is a fixed-frequency PWM controller optimized for high-performance DC-DC power supplies. It operates in current-mode control, providing improved loop response and simplified compensation. The device includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for precise duty cycle control.  

### **Features:**  
- **Current-Mode Control** for improved transient response  
- **Automatic Feed-Forward Compensation**  
- **Latching PWM** for cycle-by-cycle current limiting  
- **Trimmed Oscillator** for precise frequency control  
- **Undervoltage Lockout (UVLO)** with hysteresis  
- **High-Current Totem Pole Output** (1A peak)  
- **Low Start-Up and Operating Current**  
- **Internal Soft-Start**  
- **500 kHz Operation**  

This information is based on the manufacturer's datasheet for the UC2844AD from STMicroelectronics.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD TI/UNITRODE 183 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI) under the UNITRODE brand.  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Operating Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Output Current (Peak):** ±1 A  
- **Supply Voltage (VCC):** 8.5V to 30V  
- **UVLO (Undervoltage Lockout):**  
  - Startup Threshold: 16V (typical)  
  - Turn-off Threshold: 10V (typical)  
- **Reference Voltage (VREF):** 5V ±1%  
- **Current Sense Comparator:** Adjustable threshold with leading-edge blanking  
- **Error Amplifier:** High-gain bandwidth (1 MHz typical)  
- **Package:** SOIC-8 (D)  

### **Descriptions and Features:**  
- Designed for offline and DC-DC converter applications.  
- Features include precise duty cycle control, cycle-by-cycle current limiting, and automatic feed-forward compensation.  
- Includes a built-in trimmed oscillator for accurate frequency control.  
- Provides soft-start capability for controlled startup.  
- Internal thermal shutdown protection.  
- Low startup and operating current.  
- Compatible with voltage-mode and current-mode topologies.  

The UC2844AD is widely used in power supply designs, including flyback, forward, and boost converters.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD UNITRODE 4000 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by UNITRODE.  

### **Specifications:**  
- **Input Voltage Range:** Up to 30V  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Low Startup Current:** <1mA  
- **Undervoltage Lockout (UVLO):** 16V (on) / 10V (off)  
- **Package:** 8-Pin SOIC (D)  

### **Descriptions:**  
The UC2844AD is designed for offline and DC-DC converter applications, providing precise control for switching power supplies. It features current-mode operation for improved loop response and simplified compensation.  

### **Features:**  
- **Current-Mode Control:** Enhances noise immunity and simplifies feedback loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Trimmed Oscillator Discharge Current:** Ensures precise duty cycle control.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Latching PWM for Overvoltage Protection:** Ensures safe shutdown in fault conditions.  

This device is commonly used in power supply designs, including flyback, forward, and boost converters.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD UCC 428 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a current-mode PWM controller manufactured by Texas Instruments (formerly Unitrode). Below are the factual specifications, descriptions, and features of the UC2844AD:  

### **Manufacturer:**  
- **UCC (Unitrode, now part of Texas Instruments)**  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Supply Voltage (VCC):** 8.4V to 30V (start-up), 7.6V (UVLO turn-off)  
- **Output Current (Peak):** ±1A (source/sink)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Error Amp Bandwidth:** 1 MHz  
- **Current Sense Comparator Delay:** 200 ns  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8 (D)  

### **Descriptions:**  
- The UC2844AD is a fixed-frequency PWM controller optimized for high-performance DC-DC converters.  
- It features a trimmed oscillator for precise duty cycle control and includes a temperature-compensated reference.  
- The device includes a high-gain error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.  
- It has built-in under-voltage lockout (UVLO) protection with hysteresis.  

### **Features:**  
- **Current-Mode Operation:** Provides cycle-by-cycle current limiting.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Latching PWM:** Ensures single-pulse response per clock cycle.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **Low Startup Current:** Typically 0.5 mA.  

This information is based on the manufacturer's datasheet for the UC2844AD.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD LINFINITY 300 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by LINFINITY. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 8V to 30V  
- **Operating Frequency:** Up to 500 kHz  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Error Amplifier Gain Bandwidth:** 1 MHz  
- **Start-Up Current:** <1 mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**
- The UC2844AD is a fixed-frequency PWM controller optimized for DC-DC converter applications.  
- It features current-mode control for improved loop response and simplified feedback compensation.  
- Includes built-in protections such as under-voltage lockout (UVLO) and cycle-by-cycle current limiting.  

### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies loop stabilization.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown behavior.  
- **Programmable Oscillator:** Allows flexible frequency adjustment via external components.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Power Consumption:** Suitable for energy-efficient designs.  

This information is based on the manufacturer's datasheet for the UC2844AD by LINFINITY.

Application Scenarios & Design Considerations

Current Mode PWMs
Partnumber Manufacturer Quantity Availability
UC2844AD TI 1960 In Stock

Description and Introduction

Current Mode PWMs The UC2844AD is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V (operating), 7.5V (UVLO turn-on), 7V (UVLO turn-off)  
- **Output Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
- The UC2844AD is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Features include under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for precise frequency control.  

### **Features:**  
- **Current-Mode Control:** Enhances line and load regulation.  
- **Automatic Feed-Forward Compensation:** Simplifies loop design.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable startup and shutdown.  
- **Trimmed Oscillator:** Precise frequency control with external timing components.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Low Startup Current:** Typically 0.5mA.  

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

Application Scenarios & Design Considerations

Current Mode PWMs

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