AH5771
SINGLE PHASE HALL EFFECT LATCH SMART FAN
MOTOR CONTROLLER
Features
•
•
•
•
•
•
•
•
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)
General Description
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 -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
AH5771
D2
C
V
SS
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
AH5771
SINGLE PHASE HALL EFFECT LATCH SMART FAN
MOTOR CONTROLLER
Ordering Information
A H 5 771 - P G - B
Package
P : SIP-4L
Green
Packing
B : Bulk
G : Green
Device
AH5771-PG-B
Notes:
Package Code
P
Packaging
(Note 2)
SIP-4L
Quantity
1000
Bulk
Part Number Suffix
-B
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
1:
2:
3:
4:
1 2
3
4
Vdd
O1
O2
Vss
SIP-4L
Pin Description
Pin Name
Vdd
O1
O2
V
SS
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
AH5771
SINGLE PHASE HALL EFFECT LATCH SMART FAN
MOTOR CONTROLLER
Block Diagram
V
dd
Regulator
Full Bridge Driver
Q1
Q3
Hall
Sensor
AMP
Logic
Block
Lock
Detector
O1
Q2
Q4
O2
V
SS
Absolute Maximum Ratings
Symbol
Vdd
I
O
(peak as hold)
P
D
T
ST
Supply voltage
(Unless otherwise noted, at T
A
= 25°C)
Values
18
400
SIP-4L
550
-55 ~ 150
Unit
V
mA
mW
o
Characteristics
Output Current (Peak as hold)
Power Dissipation
Storage Temperature Range
C
Recommended Operating Conditions
Symbol
Vdd
T
A
Characteristics
Supply voltage
Operating Temperature Range
Conditions
Operating
Operating
Ratings
2.5~15
-40 to +100
Unit
V
°C
Electrical Characteristics
Symbol
Idd
V
OH
V
OL
T
ON
R
DR
(T
A
= 25°C, Vdd = 12V; unless otherwise specified)
Conditions
No Load
I
OUT
= 200mA
I
OUT
= 200mA
Vdd = 12V
T
OFF
/ T
ON
Min
-
11.4
-
-
-
Typ.
3.5
-
-
220
10
Max
5
-
0.6
-
-
Unit
mA
V
V
ms
Characteristics
Supply Current
Output Voltage High
Output Voltage Low
On Time
Duty Ratio
AH5771 Rev. 3
DS31656
3 of 6
www.diodes.com
JUNE 2009
©
Diodes Incorporated
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
