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AM9789 (Obsolete)

Inactive Datasheet Archive

Datasheet

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Description

The AM9789 is a single-phase, full wave motor driver suited for DC fan motor, and its speed is controlled by PWM input signal. It is suitable for both game machine and CPU cooler which need silent drivers. It features lock protection, thermal shutdown, PWM control, low noise and so on.

Feature(s)

BTL Output Single-phase Full-wave Linear Driver
Silent Driver
Low Supply Current (Normal Operation，Less than 4mA)
Low Standby Current (PWM=0 Duty) @ Supply Current Less than 200μA
Speed Controllable by PWM Input Signal
Built-in Quick Start Function
Built-in Lock Protection and Auto Restart Function
Built-in Hall Bias Circuit
Built-in FG Output
Built-in Thermal Shutdown Circuit
Built-in Over Current Protection Circuit

Application(s)

Silent Fan Motors

Specifications & Technical Documents

Product Parameters

Average OutputDrive Current (mA)	-
Frequency Generator (FG) and Rotation Detect	FG
Hall Bias Voltage (V)	1.3
Lock Detect, Shut-Down and Auto Start	Yes
Operating Ambient Temperature (°C)	-40 to 105
Operating Voltage (V)	-
Other Protection Features	Thermal Shutdown
Peak Output Current (mA)	1000
Reference Voltage Output (V)	-
Speed Control	PWM or VDD
Speed Control Slope Adjust	-
SupplyCurrent (mA)	2

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products