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Diodes Pericom: A product line of Diodes Incorporated

Description

The AH9485 is a single chip solution for driving a single phase (coil) brushless DC motors. It integrates the motor driver and the high sensitivity Hall effect sensor to simplify the system circuit and PCB design for simpler solutions.

Rotor lock-detect, shutdown and auto-restart functions help to prevent the motor from over-heating when rotor is locked and restarts the motor after the lock is removed.

The AH9485 has built-in open drain tachometer frequency generator (FG) and rotation detection (RD) outputs to allow external interface to monitor motor rotation, speed or rotor locks conditions easily. The FG provides magnetic change frequency while the RD provides the rotor status.

The full bridge output stage uses “soft-switching” technique to minimize the audible switching noise (vibration and acoustic noise) and electromagnetic interference (EMI) providing a low noise solutions

Over-temperature shutdown provides thermal protection for the device. An external DC voltage or a PWM (pulse-width modulation) signals on the PWM pin can be used to control the motor speed.

The AH9485 is packaged in TSOT26F.

Application

  • 5V Low Noise BLDC Cooling Fans
  • Low Voltage / Low Power BLDC Motors
  • Notebook / VGA DC Fans / Blowers
  • Micro-Motors

Features

  • Internal Full Bridge Driver
  • High Sensitivity Integrated Hall Sensor
  • Low and Wide Supply Voltage Range of 2.0V to 6V
  • Soft Switching for Low Noise
  • Rotor Lock Protection and Auto-restart
  • DC Voltage or PWM Signal Speed Control
  • Thermal Protection
  • Operating Temperature range of -40ºC to 105ºC
  • Flat pin TSOT26F Package
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Product Specifications

Product Parameters

Operating Voltage 2 to 6 V
Supply Current 1.8 mA
Average Output Drive Current 300 mA
Peak Output Current 500 mA
Typical Total RDS(ON) (NMOS and PMOS Combined) - Ω
Operating Point Bop Gauss (Min) -
Operating Point Bop Gauss (Typ) 25
Operating Point Bop Gauss (Max) 50
Release Point Brp Gauss (Min) -50
Release Point Brp Gauss (Typ) -25
Release Point Brp Gauss (Max) -
Soft-Switch -
Speed Control -
Lock Detect, Shut-Down and Auto Start -
Frequency Generator (FG) and Rotation Detect FG RD
Operating Ambient Temperature -40 to 85 °C

Related Content

Packages
TSOT26F

Applications

Quality & Reliability

Technical Documents

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH9485-WUF-7 Digi-Key Electronics 2958 7/22/2019 Buy Now Americas
AH9485-WUF-7 Mouser Electronics Inc. 2991 7/22/2019 Buy Now Americas

FAQs

Related Application FAQs