Single Phase 12V All-In-One BLDC Fan and Motor Driver
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The AH477A is an integrated Hall sensor with Hbridged output driver designed for brushless DC motor applications. The device includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a comparator to provide switching hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load. It also includes an internal bandgap regulator to provide temperature compensated bias for internal circuits and allows a wide operating supply voltage range. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the DO is turned to sink and DOB is turned to drive. This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned to drive and DOB turned to sink.
| Operating Voltage (V) | 3.5 to 18 V |
|---|---|
| SupplyCurrent (mA) | 12.5 mA |
| Average OutputDrive Current (mA) | 250 mA |
| Peak Output Current (mA) | 600 mA |
| Typical Total RDS(ON)(NMOS and PMOS Combined) | 5.5 @ 5V Ω |
| Operating Point Bop Gauss (Min) | 5 |
| Operating Point Bop Gauss (Typ) | N/A |
| Operating Point Bop Gauss (Max) | 70, 100 |
| Release Point Brp Gauss (Min) | -70, -100 |
| Release Point Brp Gauss (Typ) | N/A |
| Release Point Brp Gauss (Max) | -5 |
| Soft-Switch | N/A |
| Speed Control | VDD |
| Lock Detect, Shut-Down and Auto Start | N/A |
| Frequency Generator (FG) and Rotation Detect | N/A RD |
| Operating Ambient Temperature (°C) | -20 to 85 °C |
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-2490 | 2020-10-22 | 2021-01-22 | Additional Wafer Source (LiteOn Semiconductor Corp.) |
