Application Specific Integrated Circuit
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
Index
1.
2.
3.
4.
5.
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
Introduction
Special functions
PWM
PLL
NOS
Specifications
Block diagram
Applications
Integration
Evaluation-Board
Reliability
Summary
1. Introduction
The MICRONEL ASIC (Application
Specific Integrated Circuit) features exceptional functions and is
suitable for the control of small
motors or fans.
After three years intensive development work for a controler chip
for DC-motors and-fans, the ASIC
is now available in series.
MICRONEL has been active for already 32 years in the field of fantechnology.
Principle
Sensorless control of the 3-phase
commutation by evaluation of the
back-EMF. Due to the integrated
motor driver direct connection of
motors up to 7W is possible. Additional functions allow various
controlling combinations. The
ASIC is made of I2T-technology
and available as DICE or in a
SO28-housing.
Fig. 1: ASIC-Layout - about 5x5 mm
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
2. Special functions
-
3-phases, sensorless with BackEMF
- Wide supply voltage range
4,75-35 VDC
- Integrated driver 200mA
- Adjustable current limitation
- Interface for External-PowerDriver
- Adjustable speed regulation
- Possibility of changeable speeds
by PWM (Pulse Width Modulation)
- PLL (Phase Locked Loop) alows
a constant speed
- NOS (Non Operating Signal)
- Tacho output for external speed
control and indication
- Stop-Function
- Audio noise damping feature
PWM
Rpm Control
PWM
Speed adjustment via PWM. Selected
speed remains constant even at voltage change.
PLL
Speed remains constant even at
change of working resistance. Continuous adjustment of speed tolerances.
NOS
Information signal of motor rotations.
Vital for security applications such as
medical, aviation, respiratory systems, intrinsic safety etc..
PLL
Constant rpm at various charge
50‘000
35
rpm
rpm
VDC
500
100%
10%
5
Wide range of adjustable speed.
500 to 50'000 min¯¹
Constant speed by wide voltage range
5-35 V DC
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
3. Specifications
Symbol
Supply voltage
Power dissipation
Internal Driver current
Internal Driver current
Operating temperature
Speed oscillator
conditions
min.
4.75
typ.
12
-25
10
25
40
1.1
1.33
44
1.4
DC
Peak
360° electrical period
PWM oscillator
PWM minimal ON time
Maximum Commutation frequency
max.
35
500
200
400
85
1‘000
unit
[V]
[ mW ]
[ mA ]
[ mA ]
[ °C ]
[ Hz ]
50
2
1.66
[ kHz ]
[ ?s ]
[ kHz ]
Block diagram sensorless DCmotor with ASIC
33 phasen
phases-motor-driver
BLDC motors BLDC
speed
setting
motor
coils
Micronel ASIC
5660E - 06242
speed
control
Driver
BEMF
comparator
PWM
NOS
TACHO
DC-motor with electronic commutation
Sensorless with integrated ASIC-motor-driver
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
motor coils also
possible as triangle
4. Examples of
applications
? Low noise ultra-slim fans
(electronic noise damping)
? Explosion-proof fan for fuel
cell vehicles
? Powered air purifying respirators
(personal safety)
? Pumps with constant speed
at changeable working resistance
Integration possibilities
The DICE size of the ASIC is most
advantageous for PCB assembly
and therefore for integration into
small DC motors (min. ø, 13 mm
motor!)
Together with Power IC’c applications up to 3A are possible (for
ex. L6234)
Evaluation-Board
Customer specific applications
can be tested with the evaluation
board. A detailled manual
(Mo10X-011d) is supplied with
the EVA-Board.
Reliability
The serial productions are subject
to strict test runs at –40, 25, 85,
120°C. Longterm tests ar run at
125°C.
Fig. 2: Print with ASIC and Power IC
for DC-Motor 26mm diameter
Fig. 3: Radial fan U97 with ASIC
Fig. 4: Evaluationboard for customer applications
Micronel U.S. 1280 Liberty Way Vista Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
5. Summary
Fig. 5: Nacked ASIC chip directly on PCB (COB)
Micronel U.S. 1280 Liberty Way Vista, Ca. 92083
Tel: 760-727-7400 / Fax: 760-727-4436
Email: mus@ix.netcom.com / Web: www.micronel.com
Advantage for customers
- Optimised for a wide application range of DC-motors
- Various control possibility are
already integrated in the ASIC
- Electronic noise damping for
low noise applications
- Cheaper solutions with less
external parts
- Economy of space in ultrasmall device