SCT82A30DHKR

Overview

The SCT82A30DHKR is a synchronous buck controller designed for high-voltage applications with an input voltage range of 6V to 100V. It features a minimum on-time of 40ns and supports switch frequencies from 100kHz to 1MHz. The device includes an external VCC pin, allowing operation with external bias voltages between 4.6V and 14V to reduce internal power dissipation. Key electrical parameters include a feedback reference voltage of 0.8V±1%, a drive current of 2.3A sink and 3.5A source, and a minimum off-time of 140ns. It utilizes voltage mode control with input voltage feedforward for rapid transient response.

Feature Summary

• Supports external VCC supply to minimize internal LDO power loss and thermal stress during high-voltage operation
• Features ultra-short 40ns minimum on-time enabling direct conversion from high bus voltages to low output rails
• Incorporates spread spectrum modulation to facilitate electromagnetic interference compliance testing
• Provides input voltage feedforward functionality for accelerated response to input line variations

Applications

• 48V large-current distributed power supply systems
• Telecommunications and data communication power infrastructure
• Non-isolated Power over Ethernet (PoE) and IP camera modules
• Industrial motor control circuits
• High-power automotive DC-DC converters

Procurement Notes

Verify the specific suffix DHKR against manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure that design implementations account for the external VCC requirements if utilizing the low-loss biasing feature. Confirm compatibility with target switching frequencies and validate thermal management strategies given the high-voltage operating environment.

Selection Notes

Select this component when designing systems requiring input voltages up to 100V with efficient step-down conversion. The external VCC capability is critical for reducing self-heating in high-input scenarios compared to traditional internal LDO solutions. The 40ns minimum on-time allows for single-stage conversion from 48V buses to low voltages like 3.3V, simplifying architecture and reducing component count relative to multi-stage alternatives.

Part Context

The SCT82A30DHKR belongs to the SCT82A series of synchronous buck controllers from Xin Zhou Technology. This series addresses thermal challenges in high-voltage power management by offering flexible biasing options and wide input ranges. It serves as a specialized solution for industrial and telecom applications where efficiency and thermal performance under high differential voltage conditions are paramount.

Replacement Considerations

Publicly documented substitute part numbers are not available in the provided source material.