Overview

The LA6538T is optimal for use as a fan motor driver in equipment, such as notebook personal computers and electronic game units, that requires miniaturization and low noise levels. This device achieves highly efficient single-phase bipolar fan motor drive by providing a low saturation voltage BTL output.

Functions and Features

• BTL output single-phase full-wave linear drive (gain resistance: 180 to 500 kΩ, 360×)

— Since this device generates no switching noise, it is optimal for fan drive in audio equipment, electronic games, and notebook personal computers.

• Supports low-voltage operation and features a wide usable voltage range (VCC = 2.5 to 9.5 V).

• Low saturation voltage output (Upper side + lower side saturation voltage: VOsat(total) = 0.2 V (typ), IO = 100 mA)

— This device achieves a high coil efficiency for low current drain, and generates minimal heat in the IC itself.

• Constant-voltage Hall bias output.

— The Hall element is regulated at 2.1 V, and the device provides a stable Hall output with excellent temperature characteristics.

• FG output

— The LA6538T provides a speed detection output (an open-collector output).

• Built-in thermal protection circuit

— This circuit limits the drive current to prevent damage to or destruction of the IC when the IC chip temperature exceeds 180°C due to excessive output current caused by load shorting or other problem.

• Ultraminiature package (MSOP-8: 3.0 × 4.9 × 0.93 mm3)

— Allows the circuit board to be miniaturized and a large heat sink to be used.