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UC1843J/883B from UC

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17.578ms

UC1843J/883B

Manufacturer: UC

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC1843J/883B,UC1843J883B UC 1000 In Stock

Description and Introduction

Current Mode PWM Controller The UC1843J/883B is a high-performance current-mode PWM controller manufactured by Texas Instruments. Here are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
- **Texas Instruments (TI)**  

### **Part Number:**  
- **UC1843J/883B**  

### **Description:**  
- The UC1843J/883B is a **radiation-hardened, high-reliability** PWM controller designed for **military and aerospace applications**.  
- It is part of the **UC1842/3/4/5 family** of current-mode PWM controllers.  
- It operates in **current-mode control**, providing precise regulation and improved transient response.  

### **Key Features:**  
- **Radiation-Hardened:** Qualified for **space and high-reliability applications (883B standard)**.  
- **Current-Mode Control:** Enhances loop response and simplifies compensation.  
- **Wide Input Voltage Range:** **8V to 30V** (operational range).  
- **Adjustable Switching Frequency:** Up to **500 kHz**.  
- **Precision Reference Voltage:** **5V ±1%** (temperature-compensated).  
- **Low Startup Current:** **< 1 mA** (typical).  
- **High-Current Totem Pole Output:** **±1A peak** (suitable for driving power MOSFETs).  
- **Undervoltage Lockout (UVLO):** Ensures proper operation below minimum supply voltage.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Dual Pulse Suppression:** Prevents double-pulsing in noisy environments.  

### **Applications:**  
- **Military and Aerospace Power Supplies**  
- **Radiation-Tolerant Systems**  
- **High-Reliability DC-DC Converters**  
- **Switch-Mode Power Supplies (SMPS)**  

### **Package:**  
- **16-Pin Ceramic DIP (J package)**  

### **Temperature Range:**  
- **-55°C to +125°C** (Military-grade operating range).  

### **Certifications:**  
- **MIL-PRF-38535 Class B (883B)** qualified for high-reliability applications.  

This information is strictly factual and derived from the manufacturer's datasheet and specifications.

Partnumber Manufacturer Quantity Availability
UC1843J/883B,UC1843J883B 5 In Stock

Description and Introduction

Current Mode PWM Controller The UC1843J/883B is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Manufacturer:** Texas Instruments  
- **Part Number:** UC1843J/883B  
- **Qualification Level:** MIL-PRF-38535 Class B (high-reliability military/space)  
- **Operating Temperature Range:** -55°C to +125°C  
- **Input Voltage Range:** Up to 30V  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Package Type:** 8-Pin CERDIP (J)  

### **Descriptions:**  
- The UC1843J/883B is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance power supply applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- Designed for rugged environments, it meets military-grade reliability standards (883B).  
- Includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and soft-start capability.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop stabilization.  
- **Precision Reference:** 5V (±1%) trimmed bandgap reference.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation during power-up/down.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Military-Grade Reliability:** Qualified for high-reliability applications.  

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

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