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Product Detailed Parameters
- Description：IC PFC CTR AVERAGE 200KHZ 16SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mode：Average Current
- Frequency - Switching：200kHz
- Voltage - Supply：14.5V ~ 30V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Current - Startup：1.5 mA
- Grade：-
- Qualification：-
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Overview
The UC3854DWTR is a high-power-factor preregulator from Texas Instruments, designed for average current mode control. It operates within a switching frequency range of 80 kHz to 120 kHz and supports a supply voltage range of 10 V to 20 V. The device features a 16-SOIC surface-mount package with an operating temperature range of -40°C to +85°C. It includes built-in soft-start functionality and utilizes pulse-width modulation for precise power factor correction.
Feature Summary
- Implements average current mode control for enhanced power factor correction
- Integrates internal soft-start circuitry to manage inrush currents
- Supports pulse-width modulation for stable operation across varying loads
Applications
- High power-factor pre-regulators
- Universal input AC-DC power supplies
- Offline switch-mode power converters
Procurement Notes
Verify the suffix 'DWTR' corresponds to the tape-and-reel packaging format rather than tube or cut-tape options. Confirm the specific temperature grade matches the required operational environment, as variants exist for different thermal ranges. Ensure compatibility with the target PCB footprint for the 16-SOIC package before finalizing procurement orders.
Selection Notes
Select this component when average current mode control is required for high-efficiency power factor correction. Compare against the UC2854 series if lower switching frequencies are acceptable. Evaluate the SOIC-16 package constraints against available board space. Consider the supply voltage range requirements relative to the system's auxiliary power architecture.
Part Context
This part belongs to the UC3854 family of power factor controllers. It serves as an enhanced version of earlier PFC designs, offering improved line regulation and transient response. The DWTR variant specifically denotes the reel-packaged form factor suitable for automated surface-mount assembly processes.
Replacement Considerations
- UC3854BDWTR
- UC3854ADWTR
FAQ
What control topology does the UC3854DWTR utilize?
It utilizes average current mode control combined with pulse-width modulation.
Does the UC3854DWTR include soft-start capability?
Yes, the device integrates an internal soft-start circuit to limit inrush current during startup.
