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參數(shù)資料
| 型號： | MAX6650EUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Fan-Speed Regulators and Monitors with SMBus/I2C-Compatible Interface |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.1 A, PDSO10 |
| 封裝： | MO-187CBA, MICRO, SOP-10 |
| 文件頁數(shù)： | 14/25頁 |
| 文件大?。?/td> | 315K |
| 代理商： | MAX6650EUB |
M
Fan-Speed Regulators and Monitors
with SMBus/I
2
C-Compatible Interface
14
______________________________________________________________________________________
impedance of the tachometer input (150k
max) or the
feedback input (150k
max).
Compensation Capacitor
A compensation capacitor is needed from the fan
’
s low
side to ground to stabilize the analog control loop.
Typically, this capacitor should be 10μF, but depend-
ing on the type of fan being used, a value between 1μF
and 100μF may be required. The proper value has
been selected when no ringing is present on the volt-
age at the fan
’
s low side.
Fan Selection
For closed-loop operation and fan monitoring, the
MAX6650/MAX6651 require fans with tachometer outputs.
A tachometer output is typically specified as an option on
many fan models from a variety of manufacturers. Verify
the nature of the tachometer output (open collector, totem-
pole) and the resultant levels, and configure the connec-
tion to the MAX6650/MAX6651 accordingly. Note how
many pulses per revolution are generated by the
tachometer output (this varies from model to model and
among manufacturers, though two pulses per revolution is
the most common).
Table 10 lists the representative fan manufacturers and
the models they make available with tachometer outputs.
Low-Speed Operation
Brushless DC fans increase reliability by replacing
mechanical commutation with electronic commutation. By
lowering the voltage across the fan to reduce its speed,
the MAX6650/MAX6651 are also lowering the supply volt-
age for the electronic commutation and tachometer elec-
tronics. If the voltage supplied to the fan is lowered too
far, the internal electronics may no longer function prop-
erly. Some of the following symptoms are possible:
The fan may stop spinning.
The tachometer output may stop generating a signal.
The tachometer output may generate more than two
pulses per revolution.
The problems that occur, and the supply voltages at
which they occur, depend on which fan is used. As a
Figure 7. Using the MAX6651 to Control Parallel Fans
MAX6651
V
CC
SCL
10k
10k
10k
SDA
GPIO0
OUT
ADD
GND
FB
TACH0
TACH1
TACH2
V
CC
3V TO 5.5V
V
FAN
5V OR 12V
C
COMP
SMBus/I
2
C
INTERFACE
GPIO1
FAN
0
FAN
1
FAN
2
FULL ON
ALERT
MANUFACTURER
FAN MODEL OPTION
All DC brushless models can be
ordered with optional tachometer
output.
Tachometer output optional on some
models.
Comair Rotron
EBM-Papst
NMB
All DC brushless models can be
ordered with optional tachometer
output.
Panasonic
Panaflo and flat unidirectional
miniature fans can be ordered with
tachometer output.
Sunon
Tachometer output optional on some
models.
Table 10. Fan Manufacturers
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6650EUB+ | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6650EUB+T | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6650EUB-T | 功能描述:馬達/運動/點火控制器和驅(qū)動器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6651EEE | 功能描述:馬達/運動/點火控制器和驅(qū)動器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MAX6651EEE+ | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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