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PDF MLX81200 Data sheet ( Hoja de datos )
| Número de pieza | MLX81200 | |
| Descripción | BLDC Motor Controller | |
| Fabricantes | Melexis | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MLX81200 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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MLX81200
BLDC Motor Controller
Features
MelexCM DUAL RISC CPU
o MLX4 communication CPU
o LIN transceiver, supporting of LIN 2.0, LIN protocol software provided by Melexis
o Software update for J2602 or GM-LAN possible
o Wake up by LIN traffic or local sources
o MLX16 application CPU
o 16bit RISC-CPU with 5MIPS
o hardware multiplication in one instruction cycle
o C-programmable
o Memories
o 2kbyte shared RAM
o 30kbyte shared Flash with EEC, programmable through LIN pins
8kbytes for communication CPU, 22kbytes for application CPU
o 128bytes emulated EEPROM
Motor Control Unit
o Support of sensor less 3-phase sine and trapezoidal motor control
o Support of sensor based motor control
o Pre-driver for 3 all N-FET half bridges (~25Ω Rdson) with several protection features
Voltage Regulator
o Direct powered from 12V board net with low voltage detection
o Operating voltage VS = 6V to 18V
o Internal voltage regulator, possibility to put an external bypass transistor for higher
temperature requirements
o Very low standby current, < 50µA in sleep mode
Periphery
o Full duplex SPI: Master/Slave, double buffered, speed programmable from 10kHz to 8MHz
o 3 independent 16bit timer modules with capture and compare
o 3 programmable 8bit PWM units with base frequency of 50Hz to 100kHz
o 10bit ADC converter (5µs conversion time)
o On chip over-temperature shut-off
o Digital watchdog on MelexCM and independent analog watchdog on analog IC
o On chip RC oscillator
o Switchable supply output for external sensors
Additional Features
o In-circuit debug and emulation
o Jump start and 40V load dump protected
MLX81200 Product Abstract
Page 1 of 15
June/2012
Rev 2.4
Free Datasheet http://www.Datasheet4U.com
1 page  
MLX81200
BLDC Motor Controller
2. Application Examples
The following sections show typical application examples1.
2.1 BLDC Motor Control
In this sample application the IC can realize the sensor less driving of a BLDC motor via three external
power N-FET half bridges. The high side N-FET driving is done with a bootstrap output stage. The motor
speed command can be sent to an SW-pin, for example as duty cycle percentage. In this case SW4 can be
configured as timer input and the motor speed is a function of the duty cycle of the speed command signal.
The rotor position can be estimated based on motor currents at stand-still and very low speeds and by
sensing the back EMF voltage during short periods of time when the current through a phase is zero. The
motor phases can be driven with sinusoidal or trapezoidal currents. In the principle application schematic of
figure 2, the motor star point is not available. Instead it is modelled with external resistors from the motor
phases and connected to T input.
Motor current is controlled with an external shunt resistor and a fast internal comparator. The comparator
threshold is programmable with an 8-bit digital-to-analogue converter. In case of over current the bridge will
be switched off. The motor current can also be measured by the 10-bit ADC converter. Reverse polarity
protection of the bridge is realized with an external power FET connected to the ground line.
1 The application examples are principal application schematics only. The details need to be worked out for
each application schematic separately, depending on the application requirements.
MLX81200 Product Abstract
Page 5 of 15
June/2012
Rev 2.4
Free Datasheet http://www.Datasheet4U.com
5 Page 
4. Mechanical Specification
4.1 QFN 7x7 (48 leads)
Top View
0.3 DIA TYP.
N
1
2
3
D
MLX81200
BLDC Motor Controller
Bottom View
NX b
(Nd-1)xe ref.
e N-1 N
PIN1 ID
R0.20
1
+2
Side View
D2/2
D2
Figure 3 - QFN48 7x7 Drawing
Symbol
A A1 A2 A3 B [4] D D1 D2 E E1 E2 e L N [3] Nd [5] Ne [5]
min 0.80 0 0.60
5.30 5.30 0.45
[1] [2]
QFN48 nom 0.85 0.02 0.65 0.20
7.00 6.70 5.40 7.00 6.70 5.40 0.50 0.50 48 12 12
max 0.90 0.05 0.70
12°
5.50 5.50 0.55
Table 4 - QFN48 7x7 Package Dimensions
[1] Dimensions and tolerances conform to ASME Y14.5M-1994
[2] All dimensions are in millimeters. All angels are in degrees
MLX81200 Product Abstract
Page 11 of 15
June/2012
Rev 2.4
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MLX81200.PDF ] | |
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