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UCC38C43D from TI,Texas Instruments

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UCC38C43D

Manufacturer: TI

BiCMOS Low-Power Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UCC38C43D TI 100 In Stock

Description and Introduction

BiCMOS Low-Power Current Mode PWM Controller The UCC38C43D is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are the specifications, descriptions, and features based on the available knowledge:

### **Specifications:**  
- **Manufacturer:** Texas Instruments (TI)  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 1 MHz  
- **Supply Voltage (VCC):** 8.4V to 12V (Start-up), 7.6V to 12V (Operating)  
- **Output Drive Current:** ±1A (Peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5 MHz  
- **Propagation Delay:** 50 ns  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UCC38C43D is a high-speed PWM controller designed for switching power supplies. It features current-mode control for improved loop response and line/load regulation. The device includes an onboard oscillator, error amplifier, and high-current totem-pole output driver. It is suitable for a wide range of power supply applications, including DC-DC converters and offline power supplies.  

### **Features:**  
- **High-Speed Operation:** Supports switching frequencies up to 1 MHz.  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Wide Input Voltage Range:** Operates from 8.4V to 12V (start-up) and 7.6V to 12V (operating).  
- **High-Current Output Driver:** Capable of driving power MOSFETs directly (±1A peak).  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **Low Propagation Delay:** 50 ns for fast response to load transients.  
- **Error Amplifier with High Bandwidth:** 5 MHz for precise regulation.  
- **Thermal Shutdown Protection:** Prevents damage due to overheating.  

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

Partnumber Manufacturer Quantity Availability
UCC38C43D TI/UNITRODE 98 In Stock

Description and Introduction

BiCMOS Low-Power Current Mode PWM Controller The UCC38C43D is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI)/Unitrode.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range:** 8.4V to 35V (start-up voltage: 8.4V typical)  
- **Operating Frequency:** Up to 1MHz  
- **Output Drive Current:** 1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5MHz  
- **Soft-Start Capability:** Adjustable  
- **Undervoltage Lockout (UVLO):** 8.4V (on), 7.6V (off)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions and Features:**  
- Designed for high-frequency switching power supplies.  
- Includes a precision reference voltage (5V ±1%).  
- Features cycle-by-cycle current limiting.  
- Adjustable soft-start for controlled startup.  
- Internal leading-edge blanking for noise immunity.  
- Low startup and operating current.  
- Suitable for flyback, forward, and boost converters.  

This PWM controller is commonly used in AC/DC and DC/DC power supplies, telecom, and industrial applications.

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