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AH5792
Description
The AH5792 is a highly integrated single chip solution for driving single-phase brush-less DC fans and motors. The AH5792 has an integrated bidirectional full bridge driver output stage for single coil fan motor applications. The device includes features such as Rotor Lock Protection with rotor lock detection and automatic self-restart to avoid damage to the coil when the rotor is locked. The AH5792 provides open-drain frequency generator (Tachometer) pin, FG, which makes it easier to interface with external hardware for status and speed monitoring purposes. The FG frequency is half (1/2) the magnetic change frequency. The device is available in SOT553 and SOT89-5L packages. SOT89-5L provides thermal performance for applications such as ultra thin cooling fans and small motors, while SOT553 provides low profile small footprint for applications such as micro-vibrator in mobile phones.Features
• Support single-phase full wave min fan driver• Built-in Hall sensor input amplifier
• Low voltage startup ( Vdd=1.8V )
• Lock detection and automatic self-restart
• Without external timing capacitor, Reduces the numbers of external component required
• FG output
• Package : SOT553 and SOT89-5L Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Applications
• 3.3V / 5V Min DC Fans• Low Voltage / BLDC Motors
• Micro-Vibration Motors
Product Overview Specs
| Part Number | AH5792 |
| Output | Comp |
| Description | Mini DC Fan/Motor Full Bridge Driver |
| Operating Voltage (V) | 1.8 - 5 |
| Output Current (Ave) | 200mA (SOT553) 300mA (SOT89-5L) |
| Operating Point Bop (Gauss) | -10 - 50 |
| Release Point Brp (Gauss) | -50 - 10 |
| Operating Ambient Temp Range (°C) | -40 - 100 |
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Package Outline Information
- SOT553
- SOT89-5L
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