AH5775

AH5775
SINGLE PHASE MOTOR DRIVER WITH
INTERNAL HALL EFFECT LATCH SENSOR
PRELIMINARY - CONFIDENTIAL
Description
Pin Assignments
The AH5775 is a single-chip solution for driving single-coil brushless
direct current (BLDC) fans and motors. The integrated full-bridge
driver output stage uses soft switching to minimize audible switching
noise and electromagnetic interference (EMI) providing a low-noise
solution.
(Front View)
To simplify system circuit and minimize external components, the
device integrates a stable high-sensitivity Hall effect sensor, voltage
and temperature compensated internal references, amplifiers and the
output H-bridge power switches with low RDSON.
1. VDD
2. O1
3. O2
4. GND
To help protect the motor coil, the AH5775 provides Rotor Lock
Protection which shuts down the output drive if rotor lock is detected.
The device automatically re-starts when the rotor lock is removed. In
case of overvoltage, the device shuts down the output drive and
enters standby mode to help prevent overvoltage stress on the coil.
Over-temperature shutdown provides thermal protection for the
device.
1
2
3
4
TO94
The AH5775 is available in TO94 package.
Features
Applications
•
•
•
•
•
•
•
•
•
•
Supports single-phase full wave BLDC fan/motor drive
Built-in Hall effect sensor and input amplifier
Operating voltage: 2.5V to 18V
Soft switching for low noise DC fan motor applications
Rotor Lock Protection (Lock detection, output shutdown and
automatic restart)
Overvoltage shutdown
Thermal protection
No external timing capacitor - Reduces the numbers of external
components required
Industry Standard TO94 Package
•
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
•
•
•
Notes:
5V / 12V / 15V Min. BLDC Cooling Fans
Netbook/ Notebook and Desktop BLDC fans
Instruments Cooling Fans
Medium Voltage/ Low Power BLDC Motors
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Typical Applications Circuit (Notes 4)
Optional
PRELIMINARY - CONFIDENTIAL
SYSTEM
POWER
VDD
D1
C1
O1
Dz
Motor
Coil
AH5775
O2
GND
GND
Note:
4. C1 is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 0.1µF for small motor current to 1µF or higher for
larger motor current and place capacitor as close to the VDD pin as possible. The value of C1 should be selected adequately to support the motor current.
Pin Descriptions
Pin Number
Pin Name
Description
1
VDD
Power supply input pin
2
O1
Output drive sourcing & sinking pin
3
O2
Output drive sourcing & sinking pin
4
GND
Ground pin
Functional Block Diagram
VDD
1
Lock Detect,
Shutdown and
Automatic Re-Start
Power
Management
2
Hall
Sensor
GND
Dynamic
Offset
Concellation
AMP
Control
Logic
Block
4
AH5775
Document number: DS38232 Rev. 1 - 2
Soft
Switching
Control
Full Bridge
Driver
3
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O1
O2
December 2015
© Diodes Incorporated
AH5775
Absolute Maximum Ratings (Notes 5 & 6) (@TA = +25°C, unless otherwise specified.)
PRELIMINARY - CONFIDENTIAL
Symbol
Values
Unit
VDD_MAX
Maximum Supply Voltage (Note 6)
Characteristics
24
V
VREVERSE
Reverse Supply Voltage on All Pins
-0.3
V
IO(CONT)
Maximum Continuous Output Current
300
mA
IO(HOLD)
Maximum Output Current (Hold) - Motor Lock Condition
500
mA
IO(PEAK)
Maximum Output Current (Peak)
800
mA
B
Maximum Magnetic Flux Density
Unlimited
–
PD
Power Dissipation
1,500
mW
TSTG
TJ
 JA
 JC
ESD HBM
Notes:
TO94
Storage Temperature Range
-65 to +150
°C
Maximum Junction Temperature
+150
°C
Thermal Resistance Junction-to-Ambient
86.3
°C/W
Thermal Resistance Junction-to-Case
8.25
°C/W
4
kV
Human Body Model ESD Capability
VDD, O1, O2 and GND pins
5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may
be affected by exposure to absolute maximum rating conditions for extended periods of time.
6. The absolute maximum VDD of 24V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate
the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions
Symbol
VDD
TA
Min
Max
Supply Voltage
Characteristic
Operating
2.5
18
V
Operating Temperature Range
Operating
-40
+105
°C
Electrical Characteristics
Symbol
IDD
VOV_RLTH
Characteristics
Overvoltage Protection Threshold for
shutdown to standby mode
Overvoltage Release Threshold
Conditions
Min
Typ.
Max
Unit
No Load, PWM switching or high
–
3.
4.5
mA
Voltage increasing
19
21
23
V
Voltage decreasing
18
20
22
VDD -0.35
VDD -0.25
–
V
TA = -40°C to +105°C
VDD -0.45
VDD -0.25
–
V
VDD = 3V, IOUT = 200mA
VDD -0.31
VDD -0.2
–
V
VDD -0.35
VDD -0.2
–
V
–
0.2
0.25
V
0.2
0.3
0.15
0.18
0.15
0.22
VDD = 12V , IOUT = 300mA
VDD = 12V , IOUT = 300mA
VOH
Output Voltage High
VDD = 3V, IOUT = 200mA
TA = -40°C to +105°C
VDD = 12V, IOUT = 300mA
VDD =12V , IOUT = 300mA
VOL
Output Voltage Low
TA = -40°C to +105°C
VDD = 3V, IOUT = 200mA
VDD =3V, IOUT = 200mA
TA = -40°C to +105°C
Note:
Unit
(Note 7) (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Supply Current
VOV_TH
Conditions
–
–
–
V
V
V
7. Typical data is measured at TA = +25°C, VDD = 12V. The maximum and minimum parameters values over operating temperature range are not tested in
production, they are guaranteed by design, characterization and process control.
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Electrical Characteristics (continued) (Note 8) (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Symbol
bond wire resistance
Min
–
Typ.
1.5
Max
2.41
Unit
Ω
–
1.5
2.7
Ω
–
1.75
2.45
Ω
–
1.75
2.85
Ω
TSW
Output Soft Switch Time
17Ω load on out1/out2
–
200
–
μs
TON
On Time - Lock Detect Time
–
–
420
–
ms
RDR
Duty Ratio - Lock Detect to Shutdown time
IC junction temperature thermal shutdown
threshold
IC junction temperature thermal shutdown
hysteresis
TOFF / TON
–
10
–
–
–
–
+170
–
°C
–
–
+25
–
°C
Tj_SDN_TH
Tj_SDN_HYST
Note:
Conditions
VDD =12V , IOUT = 300mA
VDD =12V , IOUT = 300mA
TA = -40C to +105C
VDD =3V, IOUT = 200mA
VDD =3V, IOUT = 200mA
TA = -40C to +105°C
Combined N- and PMOS RDSON including
8. Typical data is at TA = +25C, VDD = 12V. The maximum and minimum parameters values over operating temperature range are not tested in
production, they are guaranteed by design, characterization and process control.
Magnetic Characteristics (Notes 9, 10 & 11) (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
(1mT = 10 G)
Max
Unit
BOP (South Pole to Part Marking Side)
Operate Point
(Notes 10 & 11)
50
70
90
BRP (North Pole to Part Marking Side)
Release Point
(Notes 10 & 11)
-90
-70
-50
BHY (BOP-BRP)
Hysteresis
–
–
140
–
Notes:
Gauss
9. Typical data is measured at TA = +25C, VDD = 12V. The maximum and minimum parameters values over operating temperature range are not tested
in production, they are guaranteed by design, characterization and process control.
10. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
11. The peak amplitude of the rotating motor magnetic flux density at the sensor location should be greater than +/-150G.
Operating Characteristics
O2
O1
VOH
VOH
RP
OFF
ON
OP
Output Voltage in Volts
Output Voltage in Volts
PRELIMINARY - CONFIDENTIAL
RON_TOTAL
Characteristics
VOL
BRP
0
Document number: DS38232 Rev. 1 - 2
OP
RP
ON
VOL
BOP
BRP
Magnetic Flux Density (B) in Gauss (G)
AH5775
OFF
0
BOP
Magnetic Flux Density (B) in Gauss (G)
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AH5775
Operating Characteristics (continued) (Notes 12 & 13)
PRELIMINARY - CONFIDENTIAL
S
Part Mark
N
(TO94)
Magentic
S
N
O1
O2
tON
Normal Spinning
tOFF
Mechanical Lock
Motor Locked Detected
Re-start Spinning
Motor Locked Cleared
Truth Table
O1
O2
Magnetic Flux Density B
H
L
B < BRP
L
H
B > BOP
Notes:
12. When the motor locks with South pole at the Hall element, O2 is kept on “L” and O1 is a clock with tON/tOFF ratio. When motor locks with North pole at
the Hall element, O1 is kept on “L”, O2 is a clock with tON/tOFF ratio.
13. When “Re-start spinning” occurs, the motor speed ramps up to the “Normal Spinning” speed from zero. Speed ramp-up profile depends on motor
characteristics.
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Application Note
DC Supply Voltage Speed Control
PRELIMINARY - CONFIDENTIAL
Motor speed can be controlled by varying the VDD supply voltage. For example, with 12V nominal motor, changing supply voltage between 12V
to 2.5V, speed can be reduced from 100% to 20.8% typically.
Soft Switching
AH5775 uses soft switching of the motor coil current during commutation to minimize audible switching noise and electromagnetic interference
(EMI).
VDD
VO1
VO2
GND
200μs typ.
Overvoltage Shutdown of Output Drive
When the supply voltage reaches the overvoltage shutdown threshold, VOV_TH, the AH5775 shuts down all the output drive switches and enters
standby mode to help prevent overvoltage stress on the coil.
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Typical Operating Characteristics
PRELIMINARY - CONFIDENTIAL
Magnetic Operating Switch Points
Average Supply Current
Lock Detect Ton and Shutdown Toff Periods
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Typical Operating Characteristics (continued)
PRELIMINARY - CONFIDENTIAL
Total H-Bridge Path Resistance – Total RDSON of High Side and Low Side Switches
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Thermal Performance
TO94 Power Dissipation Derating Curve (Note 14)
TA (C)
-40
1500
0
1500
25
1500
50
1200
60
1080
1750
70
960
80
840
85
780
90
720
95
660
100
600
105
540
110
480
120
360
60
80
100
120
140
160
125
300
130
240
140
120
150
0
Rthja = 86.3 oC/W
Power Dissipation (mW)
1500
1250
1000
750
500
250
0
-40
-20
0
20
40
Temperature TA ( C)
TO94 Thermal Derating Curve
Note 14:
TO94 through-hole mounted to minimum recommended landing pads (through holes) on a 2” x 2” two-layer 2oz. copper FR4 PCB (1.6mm thickness)
with copper flood on the top but without copper flood on the bottom layer.
TO94 Power Dissipation Derating Curve for Circuit PCB with Center Hole Cut-Out (Note 15)
TA (C)
PD (mW)
-40
827
0
827
25
827
50
662
1000
Power Dissipation (mW)
PRELIMINARY - CONFIDENTIAL
PD (mW)
60
595
70
529
80
463
85
430
90
397
95
364
100
331
105
298
110
298
120
265
40
60
80
100
120
140
160
125
198
130
165
140
132
150
0
Rthja = 151 oC/W
750
500
250
0
-40
-20
0
20
Temperature TA ( C)
TO94 Thermal Derating Curve
(Custom Circular PCB with Centre Hole Cut-Out)
Note:
15.TO94 through-hole mounted in a circular PCB with center hole cutout, single-layer 2oz. copper FR4 PCB (1.6mm thickness) with partial copper flood
on the bottom layer. The circuit PCB diameter is 1.2” with the center circular cutout diameter of 0.53”, The TO94 space cut-out is 0.2” x 0.135”. See
below for details.
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
Thermal Performance (continued)
Circular PCB Dimensions
PRELIMINARY - CONFIDENTIAL
The circular PCB diameter is 1.2” with the centre circular cutout diameter of 0.53”. The TO94 space cut-out is 0.2” x 0.135”, single-layer 2oz.copper FR4 PCB (1.6mm
thickness) with partial copper flood on the bottom layer.
Custom Circular PCB – Top View
Custom Circular PCB – Bottom View
Ordering Information
AH5775 - X - B
Packing
Package
P : TO94
B : Bulk (Note 13)
Part Number
Package Code
Packaging
AH5775-P-B
P
TO94
Bulk
Quantity
Part Number Suffix
1,000
-B
Marking Information
(1)
Package Type: TO94
Y : Year : 0~9
Part Number
5775
Y WW X
WW : Week : 01 ~ 52;
52 represents 52 and 53 week
X : Internal code
1
AH5775
Document number: DS38232 Rev. 1 - 2
2
3
4
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AH5775
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: TO94
L
c
01(2x)
E
b2
A
A3
b
e e1
D
02(2x)
L
03(2x)
Min/Max
0.63/0.84
0.27/0.48
TBD
TBD
Hall Sensor
Die
PRELIMINARY - CONFIDENTIAL
0(2x)
TO94
Dim
Min
Max
Typ
A
1.46
1.66
1.56
A3
0.76
b
0.35
0.56
0.39
b2
0.46
c
0.36
0.51
0.38
D
5.12
5.32
5.22
E
3.55
3.75
3.65
e
1.27
e1
3.81
L
13.50 15.50 14.50
L1
1.42
S
0.63
0.83
0.73
θ
6°
θ1
4°
θ2
11°
θ3
6°
All Dimensions in mm
PART
MARKING
SURFACE
1
2
3
4
Sensor Location
AH5775
Document number: DS38232 Rev. 1 - 2
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AH5775
IMPORTANT NOTICE
PRELIMINARY - CONFIDENTIAL
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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AH5775
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