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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： | 11/25页 |
| 文件大小： | 235K |
| 代理商： | MAX6651EEE+ |
MAX6650/MAX6651
Fan-Speed Regulators and Monitors
with SMBus/I2C-Compatible Interface
______________________________________________________________________________________
19
For parallel fan control while monitoring only a single
fan, select the MAX6650.
Synchronized Fan Control (MAX6651 Only)
In systems with multiple fans, an audible beat frequency
can sometimes be detected due to fan speed mismatch.
This happens in systems where fans are connected in
parallel or in systems with a MAX6650 controlling each
fan. In parallel fan systems, speed mismatches occur
because no two fans are identical. Slight mechanical
variations or loading differences can result in enough of
a speed mismatch to cause an audible beat.
Even in systems where there is a MAX6650/MAX6651
for each fan, there can still be speed mismatches. This
is primarily due to the oscillator tolerance. The
MAX6650/MAX6651 oscillator tolerance is specified to
be ±10%. In the worst case, this could result in a 20%
(one 10% high, one 10% low) speed mismatch.
The solution is to use a single MAX6651 for each fan,
and configure the parts to use a shared clock. The
shared clock can either be an external system clock or
one of the MAX6651’s internal clocks. If an external
clock is used, its frequency can range from approxi-
mately 50kHz to 500kHz.
For synchronized fan control, select the MAX6651.
Combination
In more complex systems, a combination of some or all
of the above control types may be needed.
Choosing a Fan
Once the topology is chosen, the next step is to choose
a fan. See the appropriate section.
Enter a zero in bit 3 of the configuration register for a
5V fan and 1 for a 12V fan.
Configuring this bit also adjusts the tachometer input
threshold voltage. This optimizes operation of the
MAX6650/MAX6651 for the operating voltage of the fan
being used.
Setting the Mode of Operation
The MAX6650/MAX6651 have four modes of operation
as determined by bits 5 and 6 of the configuration reg-
ister: full on, full off, open loop, and closed loop.
Full-On
The full-on mode applies the maximum available volt-
age across the fan, guaranteeing maximum cooling.
Full-on mode can be entered through software or hard-
MAX6651
VCC
SCL
10k
Ω
SDA
GPIO0
OUT
ADD
GND
FB
TACH0
VCC
3V TO 5.5V
VFAN
5V OR 12V
CCOMP
10
μF
SMBus/I2C
INTERFACE
GPIO1
GPIO2
FULL ON
ALERT
FAN
2.2k
Ω
VID
HOT-SWAP SECTION
Figure 13. Hot-Swap Application
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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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