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PDF AH5773 Data sheet ( Hoja de datos )
| Número de pieza | AH5773 | |
| Descripción | SINGLE PHASE MOTOR DRIVER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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AH5773
SINGLE PHASE MOTOR DRIVER WITH
INTERNAL HALL EFFECT LATCH SENSOR
Description
The AH5773 is a high performance, 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.
To simplify circuit design 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. For system flexibility,
the motor speed can be controlled by changing the duty ratio of the
PWM signal at the PWM pin or adjusting the supply voltage.
To help protect the motor coil, the AH5773 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 over-voltage, the device shuts down the output drive and
enters standby mode to help prevent over-voltage stress on the coil.
Over-temperature shutdown provides thermal protection for the
device. The device enters standby mode when PWM pin is pulled low
for longer than 65ms. In standby mode, AH5773 consumes less than
100µA.
A Tachometer output is provided by open-drain Frequency Generator
(FG) Pin which allows external interface to monitor motor rotation or
speed. The FG output is the magnetic change frequency.
The AH5773 is available in space saving small low profile U-
DFN2020-6 and MSOP-8EP packages.
Pin Assignments
FG 1
PWM 2
O2 3
GND 4
(Top View)
Pad
8 NC
7 NC
6 VDD
5 O1
MSOP-8EP
(Top View)
PWM 1
6 FG
VDD 2
O2 3
5 O1
Pad 4 GND
U-DFN2020-6
Features
• Supports Single-Phase Full Wave BLDC Fan/Motor Drive
• Wide Operating Voltage Range: 2.4V to 18V
• Built-in High Sensitivity Hall Effect Sensor
• Built-in H-Bridge with Low RDSON Resistance
• PWM Input for Speed Control
• Standby Feature with IDD <100µA
• Soft Switching for Low Noise DC Fan Motor Applications
• Rotor Lock Protection with Automatic Re-Start
• tOFF Clear When PWM Is Low for Greater Than 65ms
• Over Voltage Shutdown
• Thermal Protection
• Tachometer (FG) Output
• Small Low-Profile Package: U-DFN2020-6 and MSOP-8EP with
Exposed Pads for Power Handling Capability
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Applications
• 5V/ 9V/ 12V/ 15V Min. BLDC Cooling Fans and Motors
• Netbook/ Notebook and Desktop BLDC Fans
• Instruments Cooling Fans
• Medium Voltage/ Low Power BLDC Motors
Notes:
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.
AH5773
Document number: DS35444 Rev. 2 - 2
1 of 17
www.diodes.com
January 2015
© Diodes Incorporated
1 page  
AH5773
Electrical Characteristics (continued) (Notes 13 & 14) (@TA = +25°C, VDD = 12V, unless otherwise specified.)
Symbol
RON_TOTAL
tSW
tON
RDR
ILEAK
VFGOL
VPWMH
VPWML
IPWML
fPWM
DPWM_MIN
Characteristics
Combined NMOS and PMOS RDSON
Including Bond Wire Resistance
Output Soft Switch Time
On Time - Lock Detect Time
Duty Ratio - Lock Detect to Shutdown Time
FG Output Leakage Current
FG Output Voltage Low
PWM Input H Level
PWM Input L Level
PWM Pin Current
PWM Input Frequency Range
Output Duty Ratio Range
Conditions
VDD =12V, IOUT = 500mA
VDD =12V, IOUT = 500mA
TA = -40°C to +105°C
VDD =3V, IOUT = 300mA
VDD =3V, IOUT = 300mA
TA = -40°C to +105°C
17Ω load on out1/out2
–
tOFF / tON
–
IFG = 5mA
–
–
PWM pin: VPWM = 0
–
Input PWM frequency of 25kHz,
no load (Note 14)
Min
–
–
–
–
–
–
–
–
–
2.1
–
–
0.05
10
Typ
1.26
1.26
1.37
1.37
200
420
10
0.005
–
–
–
15
–
–
Max
1.9
2.4
1.87
2.4
–
–
–
1
0.4
5.5
0.8
–
50
100
Unit
Ω
Ω
Ω
Ω
μs
ms
–
μA
V
V
V
μA
kHz
%
TJ_SDN_TH
IC Junction Temperature Thermal
Shutdown Threshold
–
–
+170
–
°C
TJ_SDN_HYST
IC Junction Temperature Thermal
Shutdown Hysteresis
–
–
+25 –
°C
Notes:
13. Typical data is measured at TA = +25°C, VDD = 12V. The maximum and minimum parameter values over operating temperature range are not tested
in production. They are guaranteed by design, characterization and process control.
14. DPWM_MIN is the device output PWM duty-range capability. The minimum PWM duty ratios need to start the motor turning or maintain the rotation of the
motor, depending on the supply voltage to the motor and the electrical and mechanical design of the motor.
Magnetic Characteristics (Notes 15, 16 & 17) (@TA = -40°C to +105°C, VDD = 2.4V to 18V, unless otherwise specified.)
(1mT = 10 G)
Symbol
Parameter
Conditions
Min Typ Max Unit
BOP (south pole to part marking side) Operate Point
(Notes 15 & 17)
5 20 35
BRP (north pole to part marking side) Release Point
(Notes 15 & 17)
-35 -20 -5 Gauss
BHY (BOP-BRP)
Hysteresis
– – 40 –
Notes:
15. Typical data is measured at TA = +25°C, VDD = 12V. The maximum and minimum parameter values over operating temperature range are not tested in
production. They are guaranteed by design, process control and characterization.
16. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
17. The peak amplitude of the rotating-motor magnetic-flux density at the sensor location should be greater than +/-70G.
Operating Characteristics
O2
VOH
RP
OFF
O1
OFF
VOH
OP
ON OP
VOL
BRP 0
BOP
Magnetic Flux Density (B) in Gauss (G)
RP ON
VOL
BRP 0
BOP
Magnetic Flux Density (B) in Gauss (G)
AH5773
Document number: DS35444 Rev. 2 - 2
5 of 17
www.diodes.com
January 2015
© Diodes Incorporated
5 Page 
AH5773
Thermal Performance
MSOP-8EP Power Dissipation De-rating Curve 1 (Note 22)
TA (C) -40 0 25 50 60 70 80 85 90 95 100 105 110 120 125 130 140 150
PD (mW) 2,180 2,180 2,180 1,744 1,570 1,395 1,221 1,134 1,046 959 872 785 698 523 436 349 174 0
2500
2250
Rthja = 57.5 oC/W
2000
1750
1500
1250
1000
750
500
250
0
-40
-20
0
20 40 60 80 100 120 140 160
Note 22:
Temperature ( C)
MMSSOOPP8--8EEPPTThheerrmmaal lDDeerraatitningg CCuurrvvee
MSOP-8EP exposed pad soldered to minimum recommended landing pads (see Package Outline Dimension section) on a 2in x 2in two-layer 2oz copper
FR4 PCB (1.6mm thickness) with four thermal vias in the exposed PAD to the copper flood on the bottom layer.
MSOP-8EP Power Dissipation De-rating Curve 2 (Note 23)
TA (C) -40 0 25 50 60 70 80 85 90 95 100 105 110 120 125 130 140 150
PD (mW) 710 710 710 568 511 454 398 369 341 312 284 256 227 170 142 114 57 0
800
Rthja = 176.2 oC/W
700
600
500
400
300
200
100
0
-40
-20
0
20 40 60 80 100 120 140 160
Note 23:
Temperature ( C)
MSOP-8EP Thermal Derating Curve
MSOP8-EP Thermal Derating Curve
MSOP-8EP exposed pad soldered to minimum recommended landing pads (see Package Outline Dimension section) on a 1in x1in 2oz copper FR4
PCB (1.6mm thickness) with no thermal vias in the exposed PAD or any copper flood connecting to the landing pattern or on the bottom layer.
AH5773
Document number: DS35444 Rev. 2 - 2
11 of 17
www.diodes.com
January 2015
© Diodes Incorporated
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AH5773.PDF ] | |
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