|
|
PDF AM4964 Data sheet ( Hoja de datos )
| Número de pieza | AM4964 | |
| Descripción | SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER | |
| Fabricantes | BCD | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AM4964 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
|
No Preview Available !
A Product Line of
Diodes Incorporated
AM4964
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
Description
Pin Assignments
The AM4964 is highly integrated feature rich single phase Brushless
Direct Current (BLDC) full wave motor driver with combined PWM and
temperature speed control function for fans, blowers and extractors.
For system flexibility, the motor speed can be controlled by an
external PWM signal and temperature sensed by Thermal resister at
the same time. Based on external input PWM and temperature
signals, the AM4964 adjusts the output PWM duty cycle. If the input
PWM duty is constant, the output PWM duty varies with temperature
sensed by Thermal resister sensor between the low and high
temperature corners. If the temperature signal is constant, the output
duty varies with the external input PWM duty. The low and high
temperature corners and the output PWM duty gap between these
temperature corners are adjustable
To help protect the motor coil, the AM4964 provides a rotor lock
protection which shuts down the output if rotor lock is detected. The
device automatically re-starts when the rotor lock is removed.
AM4964 provides a tachometer output Frequency Generator
(FG). The FG output is the magnetic change frequency.
The AM4964 is available in TSSOP-20EP package.
NC 1
PGND 2
OUT2 3
VCC 4
VMIN 5
PWM 6
CF 7
FG 8
RT 9
TL 10
(Top View)
TSSOP-20EP
20 NC
19 OUT1
18 TA
17 TH
16 SGND
15 CT
14 RADJ
13 IN-
12 HB
11 IN+
Features
Flexible Speed Control Options
Combined PWM+Thermistor Speed Control
PWM Speed Control
DC Voltage Speed Control
Adjustable Low and High Temperature Corners
Full Speed When Thermal Resistor is Shorted
Adjustable Output Duty Gap between High and Low
Temperature when 100% PWM Input
Built-in oscillator – No external capacitor
Built-in Minimal Speed Setup Circuit
Alpha Slope Adjustable
Rotation Speed Indicator (FG)
Built-in Temperature Control Circuit
Built-in Thermal Shutdown Circuit
Lock Protection and Auto-restart
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
CPU Cooler Fan in PC
Brushless DC Motor Driver
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.
AM4964
Document number: DS37241 Rev. 2 - 2
1 of 21
www.diodes.com
June 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
AM4964
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
Symbol
VCC
IOUT
VOUT
VFG
IFG
PD
TSTG
JA
ESD
Parameter
Supply Voltage
Output Current
Output Voltage
FG Output Voltage
FG Output Current
Power Dissipation
Storage Temperature Range
Thermal Resistance (Junction to Ambient) (Note 5)
ESD (Human Body Model)
Rating
18
1.0
18
18
10
1.1
-55 to +150
114
3000
Unit
V
A
V
V
mA
W
°C
°C/W
V
ESD
ESD (Machine Model)
300 V
Notes:
4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability
5. TSSOP-20EP exposed pad is soldered to minimum recommended landing pads (see Package Outline Dimension section) on a 4.0mm x 3.0mm 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. See thermal de-rating
curves in the thermal performance section.
Recommended Operating Conditions
Symbol
VCC
VIN+
VIN-
TA
Parameter
Supply Voltage
Hall Input Voltage +
Hall Input Voltage -
Ambient Temperature
Min Typ Max
3.5 12
16
0.2 –
3
0.2 –
3
-30 – +90
Unit
V
V
V
°C
AM4964
Document number: DS37241 Rev. 2 - 2
5 of 21
www.diodes.com
June 2014
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
AM4964
Functional Descriptions (cont.)
CT – Locked Rotor Timing Capacitor
The CT pin will have a capacitor connected to ground. It is a multi-function pin providing timing for the lock detect and auto-restart. Different
rates of charge and discharge of CT capacitor depending on the mode of operation (fan operation status) give the lock-detect time (tLCKDET) and
lock time (tOFF) before the next auto-start retry. When the motor is running, the capacitor is discharged at every Hall signal change.
CT pin provides the timing for the Locked Rotor monitor. In normal operation, Lock Detect is enabled. If the Hall signal does not change (i.e. a
rotor lock condition) within the Lock Detect time (tLCKDET), the outputs are disabled. In this condition the motor will not be driven for a set time tOFF.
This tOFF time depends on the external CT capacitor value and its internal discharge current (IDHG). After the tOFF period device enters auto-restart
phase to re-start the motor with a new Lock Detect time. If the motor has not turned to generate a transition on the Hall inputs by the end of this
tLCKDET period, the motor re-enters motor lock tOFF period with the outputs disabled. If the Hall signal change is detected, the motor is deemed as
running and goes into lock-detection mode. The tLCKDET and tOFF are determined by the value of the external capacitor on the CT pin and the
internal charge and discharge currents during these time periods. The currents during tLCKDET and tOFF are ICHG, and IDHG respectively.
FG – Frequency Generator (Tachometer) Output Pin
This is the Frequency Generator output and is a buffered signal from the Hall sensor. This is an open collector drive giving an active pull down
with the high level being provided by an external pull up resistor.
OUT1 and OUT2 Pins
OUT1 and OUT2 pins provide H bridge driver output for fan and motor coil connection.
VCC – IC Supply voltage
This pin provides the supply for the device.
GND – Supply Return
This is the device supply ground return pin for control signal.
PGND –Power Supply Return
This is the device supply ground return pin for power output pins OUT1 and OUT2 and will generally be the most negative supply pin to the fan.
AM4964
Document number: DS37241 Rev. 2 - 2
11 of 21
www.diodes.com
June 2014
© Diodes Incorporated
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet AM4964.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AM4961 | SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER | BCD |
| AM4961A | SINGLE PHASE FULL WAVE PWM MOTOR DRIVER |  Diodes |
| AM4962 | SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER | BCD |
| AM4963 | Single Phase Full Wave Direct PWM Motor Driver | BCD |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |