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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.

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.

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.

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