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參數資料
| 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™/I<sup>2</sup>C-Compatible Interface |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.1 A, PDSO10 |
| 封裝： | MICRO MAX PACKAGE-10 |
| 文件頁數： | 4/25頁 |
| 文件大小： | 235K |
| 代理商： | MAX6650EUB+ |
MAX6650/MAX6651
Fan-Speed Regulators and Monitors
with SMBus/I2C-Compatible Interface
12
______________________________________________________________________________________
Table 8. Alarm Status Register Bit Assignments
7 (MSB) to 5
GPIO1
—
BIT
GPIO2 (MAX6651 only)
0
4
NAME
1
MIN
3
0
0 (LSB)
0
POR
(DEFAULT)
STATE
MAX
0
Always 0
Minimum Output Level Alarm
GPIO1 Alarm. Set when GPIO1 is low.
GPIO2 Alarm. Set when GPIO2 is low (MAX6651 only).
FUNCTION
Maximum Output Level Alarm
Tachometer Overflow Alarm
2
TACH
0
The first 6 bits of the Tachometer Count-Time Register
are always zero, and the last 2 bits set the count time
(Table 9). The count time may be determined from the
following equation:
tCOUNT = 0.25s x 2KCOUNT
where KCOUNT is the numerical value of the two 2LSBs.
The 0.25 factor has a ±10% uncertainty.
Upon power-up, the Tachometer Count Registers reset
to 00h and the Tachometer Count-Time Register sets a
1s integration time.
Digital-to-Analog Converter
When using the open-loop mode of operation, the DAC
Register sets the voltage on the low side of the fan. An
internal operational amplifier compares the feedback
voltage (VFB) with the reference voltage set by the 8-bit
DAC, and adjusts the output voltage (VOUT) until the
two input voltages are equal. The voltage at the FB pin
may be determined by the following equation:
VFB = (10 x VREF x KDAC) / 256
and the voltage across the fan is:
where KDAC is the numerical value of the DAC Register
and VREF = 1.5V. The minimum feedback voltage is
limited by the voltage drop across the external MOS-
FET (RON x IFAN), and the maximum voltage is limited
by the fan’s supply voltage (VFAN). For linear opera-
V
k
K
V
FAN
DAC
REF
–
90
10
1
256
+
Table 9. Tachometer Count-Time Register
(Assumes two pulses per revolution)
1 = Alarm condition
REGISTER
VALUE
(KCOUNT)
COUNT
TIME
(s)
MAXIMUM
FAN SPEED
(RPS)
MINIMUM
RESOLUTION
(Hz/COUNT)
0000 0000
0.25
512
2
1
256
0.5
0000 0001
0000 0010
1.0
128
0.5
0.25
64
2.0
0000 0011
Table 7. Alarm-Enable Register Bit Masks
7 (MSB) to 5
GPIO1
—
BIT
GPIO2 (MAX6651 only)
0
4
NAME
1
MIN
3
0
0 (LSB)
0
POR
(DEFAULT)
STATE
MAX
0
2
TACH
0
Always 0
Minimum Output Level Alarm Enable/Disable
GPIO1 Alarm Enable/Disable
GPIO2 Alarm Enable/Disable (MAX6651 only)
FUNCTION
Maximum Output Level Alarm Enable/Disable
Tachometer Overflow Alarm Enable/Disable
1 = Enabled
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6650EUB+ | 功能描述:馬達/運動/點火控制器和驅動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產品: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/點火控制器和驅動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產品: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/點火控制器和驅動器 RoHS:否 制造商:STMicroelectronics 產品: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/點火控制器和驅動器 RoHS:否 制造商:STMicroelectronics 產品: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/點火控制器和驅動器 Fan-Speed Regulator & Monitor RoHS:否 制造商:STMicroelectronics 產品: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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