UCC38085DR

UCC38085DR Product Details

Product Parameters of UCC38085DR

•  Product Name: UCC38085DR

•  Manufacturer: Texas Instruments

•  Package: 8-SOIC (0.154", 3.90mm Width)

•  Category: AC/DC & Isolated DC/DC Switching Regulators

•  Description: Low Power Current Mode Push-Pull PWM with Discharge Transistor, 12.5/8.3V UVLO, -55°C to 150°C

•  Operating Temperature: -55°C to 150°C

•  Output Current: 100mA

•  Switching Frequency: 50kHz ~ 1MHz

•  Input Voltage: 8.3V to 15V

•  Output Voltage: Adjustable

•  Duty Cycle: 49%

Product Introduction of UCC38085DR 

The UCC38085DR is a low power current mode push-pull PWM controller that can be used for isolated or non-isolated power converters. It features a discharge transistor that rapidly discharges the external capacitor when the UVLO (under voltage lockout) threshold is reached, ensuring a fast turn-off of the power switch. It also has a programmable soft-start function that reduces the stress on the transformer and the power switch during start-up. The UCC38085DR operates from a wide input voltage range of 8.3V to 15V and can provide an adjustable output voltage with a 49% duty cycle. The switching frequency is fixed at 50kHz ~ 1MHz, which allows the use of small and low-cost components. The UCC38085DR is available in an 8-SOIC package and can operate from -55°C to 150°C.

Product Application Scope of UCC38085DR 

The UCC38085DR can be used for various applications that require low power, high efficiency, and high isolation, such as:

•  Telecom and datacom power supplies

•  Industrial and medical power supplies

•  Auxiliary power supplies for appliances and consumer electronics

•  Battery chargers and adapters

•  LED drivers and lighting systems

Common Questions and Answers of UCC38085DR 

•  Q: What is the difference between UCC38085DR and UCC38085DRG4?

•  A: The UCC38085DRG4 is a lead-free version of the UCC38085DR, which has the same functionality and performance. The UCC38085DRG4 is compliant with the RoHS (Restriction of Hazardous Substances) directive.

•  Q: What is the purpose of the discharge transistor of the UCC38085DR?

•  A: The discharge transistor of the UCC38085DR is a feature that enhances the UVLO (under voltage lockout) function. When the input voltage falls below the UVLO threshold, the discharge transistor turns on and quickly discharges the external capacitor connected to the VDD (supply voltage) pin. This ensures that the power switch is turned off immediately and prevents any damage or malfunction caused by a prolonged low input voltage condition.