Datasheet.kr   

MLX90285 데이터시트 PDF




Melexis에서 제조한 전자 부품 MLX90285은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 MLX90285 자료 제공

부품번호 MLX90285 기능
기능 24V Low Noise Two-Coil Fan Driver
제조업체 Melexis
로고 Melexis 로고


MLX90285 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 13 페이지수

미리보기를 사용할 수 없습니다

MLX90285 데이터시트, 핀배열, 회로
MLX90285
24V Low Noise Two-Coil Fan Driver
Features and Benefits
1-chip solution (Hall element + Output Drivers)
Soft Switching for low noise
Active Slope Control without external components
automatically adapts slope to rotation speed
Two-Stage Thermal Protection
Locked Rotor Protection and auto-restart
Tachometer open drain output (MLX90285-FG)
Alarm open drain output (MLX90285-RD)
Available in 4-pin through-hole VK (“No-VDD” design)
and surface mount SOIC8, all “Green” Compliant package
Pin-to-pin compatible with US90A & US91A
Application Examples
24V Two-Coil Design Cooling Fans
Office Automated Equipment (Printers)
Brown-Goods (DVD player)
Home Appliances (Rice cooker)
Automotive Climate Control Fan
Car Audio Cooling Fan
Ordering Code
Product Code Temperature Code
MLX90285
L
MLX90285
L
MLX90285
L
MLX90285
L
Package Code
VK
VK
DC
DC
Option Code
ABA-000
AAA-000
ABA-000
AAA-000
Packing Form Code
BU
BU
RE
RE
Legend:
Temperature Code:
Package Code:
Option Code:
Packing Form:
L for Temperature Range -40°C to 150°C
VK for Plastic Single in Line
DC for SOIC150
AAA-000 for Frequency Generation, ABA-000 for Rotation Detection
BU for Bulk, RE for Reel (live bug)
Ordering example:
MLX90285LVK-ABA-000-BU
1 Functional Diagram
2 General Description
OUT1
Power Output Driver
HV Clamp
Slope
Control
Level
Shifter
No-VDD system
Voltage Regulator
Crossover
Detection
Hall plate
BOP/BRP
Offset
Cancellation
COMP
Power-On Reset
Oscillator
Digital Core
Locked Rotor
Protection
Output Control
Digital Slope
Control
Register
Two-Stage
Thermal Protection
Test Control
Clock
Generator
GND
OUT2
Power Output Driver
HV Clamp
Slope
Control
Level
Shifter
DAC
Reference Bias
Supply Voltage
Track & Hold
Logic Driver
FG/RD
The MLX90285 is a one-chip solution for driving two-coil
brushless DC cooling fans.
The device features Soft Switching to lower acoustic and
electrical fan noise. This efficient solution is enhanced with an
intelligent Active Slope Control which automatically adjusts
the slope duration depending on the fan rotation speed. Thus,
the fan performance to noise ratio is always kept optimum
without the need of tuning via external component.
The device includes a novel Two-Stage Thermal Protection as
well as Locked Rotor Protection for demanding application
safety requirements.
Frequency Generator or Rotation Detection is available. The
open-drain output makes the connectivity with any external
interface for hardware monitoring easier.
These features are combined with the Melexis patented no-
VDD design to fit the IC in small 4-pin VK package.
The device is also delivered in DC package for automatic
assembly.
3901090285
Rev. 004
Page 1 of 14
DataSheet
Apr/13
Free Datasheet http://www.Datasheet4U.com




MLX90285 pdf, 반도체, 판매, 대치품
MLX90285
24V Low Noise Two-Coil Fan Driver
6 General Electrical Specifications
DC Operating Parameters TJ = 25°C, VDD = 24V (unless otherwise specified)
Parameter
Symbol Test Conditions
Fan Supply Voltage
Extended Operating Voltage (2)
Supply Current
Power-On Reset Voltage
VDD
VDD
IDD
VPOR
Recommended Operating (average)
Fully Functional
Output Driver Resistance
RDSON
Output Clamping Voltage
FG / RD Output Low Voltage
FG / RD Output Clamp Voltage
FG / RD Output Leakage Current
Typical Rotation Speed Range
with Active Slope Control
VOUT 1,2
VOL
VCLAMP
ILEAK
ASLON
Output Slope Duration To Torque
Period Ratio (3, 4)
SLRATIO
Locked Rotor Period
TON
Locked Rotor Period
Thermal Protection Level1 ON (5)
TOFF
TSD1ON
Thermal Protection Level1 OFF TSD1OFF
Thermal Protection Level2 ON
TSD2ON
Thermal Protection Level2 OFF TSD2OFF
DC Thermal Resistance
RTH-ja
RTH-jc
VK Thermal Resistance
RTH-ja
RTH-jc
Table 2: General electrical specifications
VDD = 5V
IOL = 10mA
VFG (VRD) = 18V
VDD = 12 to 24V
2-pole pair rotor magnet
VDD = 12 to 24V
VDD = 5V
One-sided PCB, zero LFPM
One-sided PCB, zero LFPM
Min
9.6 (1)
5
60
28
Typ
2
1.8
2
3
250
Max Units
30 V
30 V
4 mA
V
3 ohms
5 ohms
80 V
500 mV
V
10 µA
2300
6700 RPM
6.25 10
%
4.2 10
%
0.43 sec
2.6 sec
140 C
120 C
160 C
140 C
150
50
200
C/W
70
1 The minimal value of VDD should be determined using the following equation: VDD = 9.6V + RCOIL * IDD
2 The extended operating voltage is the range in which the device is able to start-up properly (down to 5V) with full functionality of the device (including basic
function like magnetic field sensing, FG output, Locked Rotor protection,...) with potential deviation versus normal operating conditions
3 The SLRATIO is defined as the ratio of the slope duration over the motor torque period, equal to the half of the electrical output period T of OUT1 or OUT2 :
SL
RATIO
t
SLOPE
T
M
t
2 SLOPE
T
OUT
4 Within ASLON range, slope measured from VDSon to 100% VDD
5 Output Slope Duration reduced to half its normal value
3901090285
Rev. 004
Page 4 of 14
DataSheet
Apr/13
Free Datasheet http://www.Datasheet4U.com

4페이지










MLX90285 전자부품, 판매, 대치품
MLX90285
24V Low Noise Two-Coil Fan Driver
The Slope Control provides smooth change in the coil current and allows reducing both electrical and acoustic noise.
In addition, the MLX90285 slope generation is processed upon reaching a precise magnetic threshold BOP/BRP. Unlike other
fan driver using the rotor magnetic field amplitude which might lead to difficulty in adequate rotor magnet magnetisation,
the Melexis solution provides best results with different fan size with weaker or stronger rotor magnet.
10.2 Best Performance to Noise compromise
The MLX90285 features a typical 6.25% ratio between slope duration over the torque period, proportional to the fan rotation
speed. This value is controlled to provide the best compromise between fan performance (rotation speed and current
consumption) and acoustic noise. Increasing this ratio mainly lowers the motor efficiency while decreasing this ratio removes
the low noise benefit.
SLRATIO
Performance
Low Performance
Output Slope Duration
408us
6.25%
2300
High Performance
Low Noise
Acoustic Noise
Rotation speed
(RPM)
Medium Performance
High Noise
6700
140us
2300
Picture 2 – Slope Duration to Torque Period Ratio effect
Rotation speed
6700
The device keeps this ratio constant within a large rotation speed range from 2300RPM to 6700RPM (2-pole pair fan).
Therefore, the device automatically adjusts its low noise specification to a given cooling application requirements.
10.3 Two-Stage Thermal protection
The use of soft switching through linear slope control leads to an increase of the IC junction temperature . As a result, using
long slope and high output current can result in reaching the thermal protection threshold and so shut off the device to
prevent overheating. In the application, it would stop a low noise cooling fan in an environment where cooling is a required
due to high temperature.
The MLX90285 is the first fan driver to integrate a Two-Stage Thermal Protection.
When the IC junction temperature exceeds a 1st thermal threshold TSD1 ON (140°C typical), the slope duration are
unconditionally divided to half the actual value. The immediate effect is a reduction of the average power dissipation, hence
it stabilizes or even starts reducing the IC junction temperature so the cooling fan continues rotating to provide airflow in a
system.
The slope duration is back to normal when the junction temperature decreases below TSD1OFF (120°C typical).
However, in case the reduction of the slope duration is not enough to stop the junction temperature increase, the device has
a 2nd thermal threshold TSD2ON (160°C typical) which then shuts-off the IC to prevent over-heating. All the outputs OUT1,
OUT2 and FG/RD goes to high level and stay in this state until the junction temperature decreases below TSD2OFF (140°C
typical).
3901090285
Rev. 004
Page 7 of 14
DataSheet
Apr/13
Free Datasheet http://www.Datasheet4U.com

7페이지


구       성 총 13 페이지수
다운로드[ MLX90285.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
MLX90283

BLDC Vibration Motor Driver

Melexis
Melexis
MLX90285

24V Low Noise Two-Coil Fan Driver

Melexis
Melexis

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵