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UC3843ADR2 from ON,ON Semiconductor

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UC3843ADR2

Manufacturer: ON

High Performance Current Mode Controller

Partnumber Manufacturer Quantity Availability
UC3843ADR2 ON 8500 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3843ADR2 is a current-mode PWM controller manufactured by ON Semiconductor. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** ON Semiconductor  
- **Category:** Integrated Circuits (ICs)  
- **Family:** PMIC - Voltage Regulators - DC DC Switching Controllers  
- **Topology:** Boost, Flyback, Forward  
- **Control Mode:** Current Mode  
- **Output Type:** Transistor Driver  
- **Number of Outputs:** 1  
- **Frequency - Switching:** Up to 500kHz  
- **Duty Cycle (Max):** 100%  
- **Input Voltage (Min):** 8.4V  
- **Input Voltage (Max):** 30V  
- **Supply Voltage (Vcc/Vdd):** 8.4V to 30V  
- **Operating Temperature:** -40°C to +85°C  
- **Package / Case:** SOIC-8  
- **Mounting Type:** Surface Mount  

### **Descriptions:**
- The UC3843ADR2 is a high-performance fixed-frequency current-mode PWM controller.  
- It is designed for DC-DC converter applications, including offline and DC-to-DC power supplies.  
- The device features a trimmed oscillator for precise duty cycle control and a temperature-compensated reference.  
- It includes a high-gain error amplifier, current sensing comparator, and a totem-pole output stage.  

### **Features:**
- **Current-Mode Operation:** Provides improved line regulation and transient response.  
- **Automatic Feed-Forward Compensation:** Simplifies loop stabilization.  
- **Latching PWM:** Ensures single-pulse per period operation.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **High-Current Totem-Pole Output:** Capable of driving power MOSFETs directly.  
- **Programmable Oscillator:** Allows frequency adjustment with external components.  
- **Low Startup Current:** Typically 0.5mA.  
- **Cycle-by-Cycle Current Limiting:** Enhances system protection.  

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

Application Scenarios & Design Considerations

High Performance Current Mode Controller
Partnumber Manufacturer Quantity Availability
UC3843ADR2 MOTOROLA 1200 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3843ADR2 is a current-mode PWM controller manufactured by Motorola (now part of ON Semiconductor). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** Motorola (now ON Semiconductor)  
- **Type:** Current-Mode PWM Controller  
- **Package:** SOIC-8  
- **Operating Voltage Range:** 8.5V to 30V  
- **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  

### **Descriptions:**  
The UC3843ADR2 is a high-performance fixed-frequency current-mode PWM controller designed for DC-DC converter and offline power supply applications. It features an oscillator, high-gain error amplifier, current sensing comparator, and a totem-pole output stage capable of driving a power MOSFET directly.  

### **Features:**  
- **Current-Mode Operation:** Provides improved line and load regulation.  
- **Automatic Feed-Forward Compensation:** Simplifies loop stabilization.  
- **Latching PWM:** Ensures cycle-by-cycle current limiting.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation with thresholds of 8.5V (on) and 7.6V (off).  
- **Internal Trimmed Reference:** 5V with ±1% accuracy.  
- **High-Current Totem-Pole Output:** 1A peak drive capability.  
- **Low Start-Up Current:** Typically less than 1mA.  
- **500kHz Oscillator Frequency:** Allows for high-frequency operation.  

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

Application Scenarios & Design Considerations

High Performance Current Mode Controller
Partnumber Manufacturer Quantity Availability
UC3843ADR2 mot 177 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3843ADR2 is a high-performance current-mode PWM controller manufactured by Texas Instruments.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (Vcc):** 8.5V to 30V (operating), 7.6V (start-up), 30V (max)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3843ADR2 is designed for DC-DC converter applications, providing precise control for switching power supplies. It features an oscillator, temperature-compensated reference, high-gain error amplifier, current sensing comparator, and a totem-pole output stage.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Cycle-by-Cycle Current Limiting:** Enhances system reliability.  
- **Internal Trimmed Reference:** Reduces external component count.  
- **Low Start-Up Current:** Typically 0.5mA.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  

This IC 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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