UCC35702N

DC DC Switching Controllers Overview

The UCC35702N is an advanced voltage mode pulse width modulator from Texas Instruments, designed for isolated switching power supplies using primary side control. It supports Boost and Buck topologies with a single output. The device operates at a switching frequency of 700 kHz and delivers a maximum duty cycle of 100%. It features a drive output current of 1 A, with rise and fall times of 20 ns each. The component functions within an ambient temperature range of 0°C to +70°C and is housed in a 14-pin PDIP package.

DC DC Switching Controllers Feature Summary

• Supports primary side control for isolated switching power supplies
• Enables synchronous rectification via dedicated drive outputs
• Integrates soft-start functionality for controlled startup sequences

DC DC Switching Controllers Applications

• Isolated DC-DC converter designs
• Power supply units requiring primary side regulation
• Applications utilizing synchronous rectification techniques

DC DC Switching Controllers Procurement Notes

Verify the specific package type required for your design, as the UCC35702 family includes surface mount variants like SOIC and TSSOP alongside the through-hole PDIP option. Confirm that the 700 kHz switching frequency aligns with your thermal and efficiency targets. Ensure the 1 A drive capability meets the gate charge requirements of your external MOSFETs. Check for any updated revision notes regarding pin compatibility or electrical characteristics before finalizing the bill of materials.

DC DC Switching Controllers Selection Notes

Select this component when primary side control is preferred over secondary side feedback for cost reduction or isolation simplification. The 1 A drive strength is suitable for medium-power applications where low gate resistance is needed. Consider the 700 kHz frequency for balancing component size against switching losses. The PDIP package is appropriate for prototyping or high-reliability through-hole manufacturing environments rather than dense surface mount assemblies.

DC DC Switching Controllers Part Context

The UCC35702N belongs to the UCC3570x family of advanced voltage mode PWM controllers. This series is engineered specifically for isolated converters, distinguishing itself by supporting primary side regulation architectures. Unlike standard PWM ICs, it integrates features necessary for synchronous rectification control, making it a specialized solution for efficient isolated power conversion systems.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.