AH5771 Datasheet | Diodes Incorporated

Features SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER General Description - Support single-phase full wave min fan driver - Built-in Hall sensor input amplifier - Low voltage startup ( Vdd=2.5V ) - Lock detection and automatic self-restart - Without external timing capacitor, Reduces the numbers of external ponent required - Low profile package : SIP-4L - SIP-4L: Available in “Green” Molding pound (No Br, Sb) - Lead Free Finish / Ro HS pliant (Note 1) AH5771 is the integrated Hall sensor with output drivers designed for electrical mutation of brush-less DC motor application. The device is as follows: one-chip Hall voltage generator for magnetic sensing; the error amplifier that amplifies the Hall voltage; a parator is to provide switching hysteresis for noise rejection; the full bridge driver for sinking and driving current load. Internal band gap regulator is used to provide temperature pensated bias for internal circuits and allows a wide operating supply voltage range. 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 blocked. AH5771 is rated for operation over-temperature range from -40℃ to 100℃ and voltage range from 2.5V to 15V. The device is available in low profile package SIP-4L. Typical Application Circuit POWER D1 V dd O1 O2 D2 V SS Note: D2 (Zenor Diode) and Capacitor C are for power stabilization, D2 is remended to be 18Vz (option), C is remended to 0.1u F ~1u F (E-Cap). D1 (reverse Diode) is for reverse voltage protection. AH5771 Rev. 3 DS31656 1 of 6 .diodes. JUNE 2009 © Diodes Incorporated Ordering Information SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER A H 5 771 - P G - B Package P : SIP-4L Green G : Green Packing B : Bulk Device AH5771-PG-B Package Code P Packaging (Note 2) SIP-4L Quantity 1000 Bulk Part Number Suffix -B Notes: 1. EU Directive 2002/95/EC (Ro HS). All...