LV88551RTXG

Overview

The LV88551RTXG is a pre-driver for single-phase 24 V/48 V BLDC motors, featuring a closed-loop controller for motor rotation speed. It supports low vibration and low noise operation with lead-angle adjustment capabilities. The device operates within a supply voltage range of 6 V to 20 V, with a maximum output current of 50 mA. It utilizes an SSOP-20 package measuring 5.65 x 4.4 x 1.4 mm. The typical switching frequency is 48 kHz, and it functions reliably across an operating temperature range from -40 °C to +150 °C.

Feature Summary

• Closed-loop controller for precise motor rotation speed management
• Lead-angle adjustment capability for optimized performance
• Designed for low vibration and low noise operation

Applications

• Single-phase 24 V/48 V BLDC motor control
• Fan speed regulation systems
• Low-noise motor applications

Procurement Notes

Verify the specific suffix 'RTXG' against official onsemi documentation to confirm tape-and-reel packaging and exact marking codes. Ensure compatibility with the required 24 V or 48 V system architecture. Confirm that the SSOP-20 footprint matches the design layout. Validate thermal requirements given the +150 °C maximum junction temperature rating.

Selection Notes

Select this component when a single-phase BLDC driver with integrated closed-loop speed control is required. It is suitable for applications demanding low acoustic noise and minimal vibration. Consider the 50 mA output limit and 48 kHz switching frequency for inductor and capacitor selection. Verify that the 6 V to 20 V input range aligns with the available power supply rails.

Part Context

The LV88551 belongs to the LV88551 series of pre-drivers designed for single-phase BLDC motors. This series includes variants such as LV88561, LV88562, LV88563, and LV88564, which share similar functional principles but may differ in specific electrical ratings or package options. These devices are engineered for efficient motor control in compact form factors.

Replacement Considerations

Check for direct pin-compatible alternatives within the LV8855x series, such as the LV88564, if higher current capacity or different packaging is needed. Verify that any substitute maintains the same closed-loop control functionality and lead-angle adjustment features.