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ZH6551

ZH6551

Single-Phase BLDC Fan/Pump Driver (External MOS)

H-Bridge Pre-Driver, Soft Commutation, Soft Start Control, and Protective Functions

The ZH6551 is a single-phase brushless DC motor driver chip featuring an integrated Hall sensor, H-bridge pre-driver, soft commutation and soft start control, along with protection functions including current limiting, short-circuit, overvoltage, overtemperature, and undervoltage protection. The chip supports PWM speed control (with optional speed closed-loop mode), configurable speed curves, and FG output feedback functionality.

data table ZH6551 Datasheet
Characteristics and advantages Ordering Information Product Application Documents and Resources

Characteristics and advantages

Single-phase fan driver with optional integrated or external Hall sensor

3V~28V supply voltage, integrated PNMOS pre-driver

Low-current standby mode <10μA

Configurable leading angle for optimized efficiency

Configurable speed curves

Configurable output waveforms

Optional speed closed-loop control

Optional FG/RD diagnostic outputs

PWM input frequency: 50Hz to 100kHz

Current limiting function

Short-circuit protection, overtemperature, overvoltage, undervoltage protection

Ordering Information

Product Application

Documents and Resources

2025产品选型指南

Selection Guide English version
2025-10-22

ZH6551 Datasheet

Datesheet download
2025年 10月 29日

Application Note for ZH6551

Application Note

video

The ZH6551 is a single-phase brushless DC motor driver chip featuring an integrated Hall sensor, H-bridge pre-driver, soft commutation and soft start control, along with protection functions including current limiting, short-circuit, overvoltage, overtemperature, and undervoltage protection. The chip supports PWM speed control (with optional speed closed-loop mode), configurable speed curves, and FG output feedback functionality.
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