IC Phoenix logo

Home ›  U  › U7 > UC3844B

UC3844B from

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

0.000ms

UC3844B

HIGH PERFORMANCE CURRENT MODE CONTROLLERS

Partnumber Manufacturer Quantity Availability
UC3844B 500 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE CONTROLLERS The UC3844B is a high-performance current-mode PWM controller manufactured by Texas Instruments and other semiconductor companies. Below are the factual specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 7.6V to 30V  
- **Operating Frequency:** Up to 500 kHz  
- **Output Duty Cycle:** 0% to 50% (adjustable)  
- **Output Current (Peak):** 1A (sink/source)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Start-up Current:** <1mA  
- **Operating Temperature Range:** -40°C to +85°C (industrial)  
- **Package Options:** SOIC-8, PDIP-8  

### **Description:**  
The UC3844B is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and offline power supply applications. It operates in current-mode control, providing improved line and load regulation. The device includes an oscillator, error amplifier, current-sensing comparator, and a totem-pole output stage capable of driving a power MOSFET directly.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up with hysteresis.  
- **Programmable Oscillator:** Allows adjustable frequency and duty cycle.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Error Amplifier with Reference:** Provides precise voltage regulation.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  

This information is derived from the manufacturer's datasheet and technical documentation.

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips