Diodes Incorporated
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AH5775 (Not Recommended for new design)

NRND = Not Recommended for New Design

SINGLE PHASE LOW NOISE SMART MOTOR DRIVER

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Description

The AH5775 is a single chip solution for driving single-coil brushless direct current (BLDC) fans and motors. The integrated full-bridge driver output stage uses soft switching to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution.

To simplify system circuit and minimize external components, the device integrates a stable high sensitivity Hall-Effect sensor, voltage and temperature compensated internal references, amplifiers and the output H-bridge power switches with low RDSON.

To help protect the motor coil, the AH5775 provides Rotor Lock Protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. In case of over voltage, the device shuts down the output drive and enters standby mode to help prevent over voltage stress on the coil. Over temperature shutdown provides thermal protection for the device.

The AH5775 is available in TO94 package.

Feature(s)

  • Supports Single-Phase Full Wave BLDC Fan/Motor Drive
  • Built-In Hall Effect Sensor and Input Amplifier
  • Operating Voltage: 2.5V to 16V
  • Soft Switching for Low Noise DC Fan Motor Applications
  • Rotor Lock Protection (Lock detection, output shutdown and automatic re-start)
  • Overvoltage Shutdown
  • Thermal Protection
  • No External Timing Capacitor - Reduces the Numbers of External Components Required
  • Industry Standard TO94 Package
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Application(s)

  • 5V / 12V / 15V Min. BLDC Cooling Fans
  • Netbook/ Notebook and Desktop BLDC Fans
  • Instruments Cooling Fans
  • Medium Voltage/Low Power BLDC Motors

Product Specifications

Product Parameters

Average OutputDrive Current (mA) 300
Frequency Generator (FG) and Rotation Detect -
Lock Detect, Shut-Down and Auto Start Yes
Operating Ambient Temperature (°C) -40 to 105
Operating Point Bop Gauss (Max) 90
Operating Point Bop Gauss (Min) 50
Operating Point Bop Gauss (Typ) 70
Operating Voltage (V) 2.5 to 18
Peak Output Current (mA) 800
Release Point Brp Gauss (Max) -50
Release Point Brp Gauss (Min) -90
Release Point Brp Gauss (Typ) -70
Soft-Switch Yes
Speed Control VDD
SupplyCurrent (mA) 3
Typical Total RDS(ON)(NMOS and PMOS Combined) -

Related Content

Quality Documentation
Applications

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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-2654 2024-02-15 2024-04-28 Device End of Life (EOL)

FAQs

Related Application FAQs