ATS477 is a single-phase hall effect latch produced by Anachip Company. It integrates hall sensor and output drivers and is used for the electronic commutation of brushless DC motor. The device includes a chip-on Hall voltage generator for magnetic sensing, an error amplifier that amplifies the Hall voltage, a comparator that is to provide switching hysteresis for noise rejection, the bi-direction drivers for sinking and driving large current load, and the frequency generator (FG) that provides a signal proportional to rotation speed. Internal bandgap regulator is used to provide temperature compensated bias for internal circuits and allows a wide operating supply voltage range. Built-in protection circuits can prevent overvoltage, overcurrent and overheating.
The Anachip ATS477 is a Single Phase Hall Effect Latch designed for the electrical commutation of brush-less DC motors. It integrates an on-chip Hall sensor with bi-direction output drivers, an error amplifier, a comparator, and a frequency generator (FG). The device features an internal bandgap regulator for temperature compensation and operates over a wide voltage range of 3.5V to 20V. It is available in SIP-4L and SOP-7L packages.
| Operating voltage | 3.5V to 20V |
|---|---|
| High output sinking capability | up to 250mA |
| Operating temperature range | -20°C to 85°C |
| Continuous Output 'on' current | 250 mA |
| Peak (Start Up) Output current | 600 mA |
| Package types | SIP-4L and SOP-7L |
| Supply Current (Vec=20V, Output Open) | 18 to 30 mA |
The device is designed for single-coil Brush-less DC Fan and single-coil Brush-less DC Motor applications.
The device allows a wide operating voltage range from 3.5V to 20V.
The devices are available in low cost die forms or rugged SIP-4L and power SOP-7L packages.