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UCC3805D from UNITRODE

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UCC3805D

Manufacturer: UNITRODE

Low-Power BiCMOS Current-Mode PWM

Partnumber Manufacturer Quantity Availability
UCC3805D UNITRODE 83 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3805D is a PWM controller manufactured by UNITRODE. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Specifications:**  
- **Manufacturer:** UNITRODE  
- **Type:** Current-Mode PWM Controller  
- **Operating Voltage Range:** 8.5V to 12V (Startup), 7.6V to 12V (Operating)  
- **Maximum Duty Cycle:** 50%  
- **Switching Frequency:** Up to 1MHz  
- **Output Drive Current:** ±1A (Peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UCC3805D is a high-performance current-mode PWM controller designed for offline and DC-DC power supplies. It features a fixed-frequency architecture with precise duty cycle control, making it suitable for flyback and forward converter topologies.  

### **Features:**  
- **Current-Mode Control:** Provides improved transient response and simplified loop compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown operation.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Internal Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **50% Duty Cycle Clamp:** Prevents transformer saturation in push-pull applications.  
- **Low Startup Current:** Typically 150µA for reduced power dissipation.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  

This information is based solely on the manufacturer's datasheet and does not include any additional recommendations.

Application Scenarios & Design Considerations

Low-Power BiCMOS Current-Mode PWM
Partnumber Manufacturer Quantity Availability
UCC3805D UCC 210 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3805D is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range (VCC):** 8.5V to 12V (start-up), 7.6V (UVLO turn-off)  
- **Operating Frequency:** Up to 1MHz  
- **Output Drive Current:** ±1A peak  
- **Duty Cycle Range:** 0% to 100%  
- **Current Sense Threshold:** 1V (typical)  
- **Propagation Delay (Turn-Off):** 50ns (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Description:**  
The UCC3805D is a low-power, current-mode PWM controller designed for offline and DC-DC power supplies. It features high-speed operation, low startup and operating currents, and precise duty cycle control. It is optimized for flyback, forward, and boost converter applications.

### **Features:**  
- **Current-Mode Control:** Provides cycle-by-cycle current limiting.  
- **Low Startup Current:** 150µA (typical) for reduced power loss.  
- **High-Speed Operation:** Supports switching frequencies up to 1MHz.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **Synchronous Operation Capability:** Allows for phase-locked loop (PLL) synchronization.  

This information is sourced from Texas Instruments' official documentation on the UCC3805D.

Application Scenarios & Design Considerations

Low-Power BiCMOS Current-Mode PWM
Partnumber Manufacturer Quantity Availability
UCC3805D UC 98 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3805D is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range:** 10V to 22V (operating)  
- **Maximum Duty Cycle:** 50% (adjustable)  
- **Switching Frequency:** Up to 1MHz  
- **Output Drive Current:** 1A (peak)  
- **Operating Temperature Range:** -40°C to 85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UCC3805D is designed for high-efficiency power supply applications, providing precise control for DC-DC converters. It features cycle-by-cycle current limiting, undervoltage lockout (UVLO), and soft-start capability.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Internal Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **Low Startup Current:** Reduces power consumption during initial operation.  
- **50% Duty Cycle Limitation:** Prevents transformer saturation in forward converters.  

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

Application Scenarios & Design Considerations

Low-Power BiCMOS Current-Mode PWM
Partnumber Manufacturer Quantity Availability
UCC3805D U 1 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3805D is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Texas Instruments  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Output Configuration:** Single-Ended  
- **Switching Frequency:** Up to 1MHz  
- **Supply Voltage (VCC):** 10V to 20V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Duty Cycle Max:** 50%  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Start-Up Current:** 0.5mA (Typical)  
- **Package:** SOIC-8  

### **Descriptions:**
- The UCC3805D is a low-power, high-speed PWM controller optimized for offline and DC-DC power supplies.  
- It features current-mode control for improved transient response and simplified loop compensation.  
- Includes an internal oscillator, error amplifier, and current-sensing comparator.  
- Designed for low standby power consumption in power supply applications.  

### **Features:**
- **Current-Mode Control:** Enhances loop stability and transient response.  
- **Low Start-Up Current:** Reduces power consumption during start-up.  
- **Precision Reference Voltage:** 5V ±1% accuracy.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within supply voltage range.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Internal Shutdown Protection:** Includes overcurrent and thermal shutdown.  

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

Application Scenarios & Design Considerations

Low-Power BiCMOS Current-Mode PWM
Partnumber Manufacturer Quantity Availability
UCC3805D TI/UNITRODE 24 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3805D is a PWM controller manufactured by Texas Instruments (TI) and originally developed by Unitrode. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Texas Instruments (TI) / Unitrode  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Supports Flyback, Forward, and Boost Converters  
- **Operating Frequency:** Up to 1MHz  
- **Supply Voltage (VCC):** 10V to 20V (with UVLO at ~9V)  
- **Output Drive Current:** ±1A (Peak)  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Error Amplifier Bandwidth:** 5MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**
- The UCC3805D is a high-performance current-mode PWM controller optimized for offline and DC-DC power supplies.  
- It includes an integrated high-speed oscillator, error amplifier, current sensing comparator, and totem-pole output driver.  
- Designed for efficiency in power conversion applications, it provides precise control for switching power supplies.  

### **Features:**
- **Current-Mode Control:** Enhances loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows flexible frequency setting via external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within safe voltage limits.  
- **Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Reduces power consumption during initial operation.  

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

Application Scenarios & Design Considerations

Low-Power BiCMOS Current-Mode PWM

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