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AH5771

SINGLE PHASE HALL EFFECT LATCH SMART FAN


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AH5771 pdf
Features
AH5771
SINGLE PHASE HALL EFFECT LATCH SMART FAN
MOTOR CONTRwOwLwL.DEaRtaSheet4U.com
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 component required
Low profile package : SIP-4L
SIP-4L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish / RoHS Compliant (Note 1)
AH5771 is the integrated Hall sensor with output drivers designed
for electrical commutation 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 comparator 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
compensated 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 -40to 100and voltage range from 2.5V to 15V. The
device is available in low profile package SIP-4L.
Typical Application Circuit
POWER
D1
V dd
D2 C
V SS
AH5771
O1
O2
Note: D2 (Zenor Diode) and Capacitor C are for power stabilization, D2 is recommended to be 18Vz (option),
C is recommended to 0.1uF ~1uF (E-Cap). D1 (reverse Diode) is for reverse voltage protection.
AH5771 Rev. 3
DS31656
1 of 6
www.diodes.com
JUNE 2009
© Diodes Incorporated



No Preview Available !

AH5771 pdf
Ordering Information
AH5771
SINGLE PHASE HALL EFFECT LATCH SMART FAN
MOTOR CONTRwOwLwL.DEaRtaSheet4U.com
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 (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
Pin Assignment
( Top View )
5771
12 3 4
SIP-4L
1 : Vdd
2 : O1
3 : O2
4 : Vss
Pin Description
Pin Name
Vdd
O1
O2
VSS
Pin No.
1
2
3
4
Description
Power supply pin
Output driving & sinking pin
Output driving & sinking Pin
Ground pin
AH5771 Rev. 3
DS31656
2 of 6
www.diodes.com
JUNE 2009
© Diodes Incorporated



Part Number AH5771
Description SINGLE PHASE HALL EFFECT LATCH SMART FAN
Maker Diodes Incorporated - Diodes Incorporated
Total Page 6 Pages
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