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参数资料
| 型号： | MAX6651EEE+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | Fan-Speed Regulators and Monitors with SMBus™/I<sup>2</sup>C-Compatible Interface |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.1 A, PDSO16 |
| 封装： | QSOP-16 |
| 文件页数： | 6/25页 |
| 文件大小： | 235K |
| 代理商： | MAX6651EEE+ |
MAX6650/MAX6651
Fan-Speed Regulators and Monitors
with SMBus/I2C-Compatible Interface
14
______________________________________________________________________________________
impedance of the tachometer input (150k
Ω max) or the
feedback input (150k
Ω 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 10F, but depend-
ing on the type of fan being used, a value between 1F
and 100F 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
VCC
SCL
10k
Ω
10k
Ω
10k
Ω
SDA
GPIO0
OUT
ADD
GND
FB
TACH0
TACH1
TACH2
VCC
3V TO 5.5V
VFAN 5V OR 12V
CCOMP
SMBus/I2C
INTERFACE
GPIO1
FAN
0
FAN
1
FAN
2
FULL ON
ALERT
MANUFACTURER
FAN MODEL OPTION
Comair Rotron
All DC brushless models can be
ordered with optional tachometer
output.
EBM-Papst
Tachometer output optional on some
models.
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6651EEE+ | 功能描述:马达/运动/点火控制器和驱动器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX6651EEE+T | 功能描述:马达/运动/点火控制器和驱动器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX6651EEE+TG074 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6651EEE-T | 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX6651EVCMAXQU | 功能描述:电源管理模块 MAX6651 Evaluation Kit/Evaluation System RoHS:否 制造商:ROHM Semiconductor 产品:AC-DC Converters 最大输入电压:264 VAC 开关频率: 输出电压:10 V to 28.8 V 输出电流:350mA 负载调节: 最大工作温度:+ 60 C 尺寸:100 mm x 16 mm x 17 mm |
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