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參數資料
| 型號： | LB1667M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Two-Phase Unipolar Drive Brushless Motor Drivers |
| 中文描述： | 兩相單極驅動無刷電動機驅動器 |
| 文件頁數： | 5/7頁 |
| 文件大?。?/td> | 128K |
| 代理商： | LB1667M |
Design Documentation (See the application circuit diagrams)
1. Power-supply voltage (V
IN
pin)
The resistor R1 (when V
CC
= 12 V R1 = 330
, and when V
CC
= 24 R1 = about 1.2 k
) is inserted between V
IN
and
the power supply V
CC
pin. When the I
CC
current is set in the range 6 to 50 mA, the V
IN
pin will be regulated to be
6.7 V. Not only does this provide stability with respect to power-supply voltage variations and motor kickback, but it
also provides adequate strength to withstand surges.
2. Output transistors (OUT1 and OUT2 pins)
A Zener diodes with the following characteristics is inserted between the collector and base of each output transistor
to absorb kickback voltages at 57 V (typical) and provide output protection.
Sustained output voltage : V
O
= 65 V minimum (design guarantee)
Output current
: I
O
= 1.5 A maximum
Output saturation voltage : V
O
sat = 1.25 V/1.0 A (typical)
Safe operating range
: I
O
= 1.0 A, V
OLM
= 57 V, t = 200 μs
3. Output circuit kickback voltage protection (Z1 and Z2 pins)
These ICs support output protection that minimizes kickback noise by changing the kickback absorption voltage and
absorption method according to the output current and power-supply voltage used.
—When the Z1 and Z2 pins are shorted
The output protection voltage will be 32 V (typical) using a V
CC
= 12 V power supply.
—When the Z1 and Z2 pins are open
The output protection voltage will be 57 V (typical) using a V
CC
= 24 V power supply.
—With a Zener diode inserted between Z1 and V
CC
or between Z1 and ground
This technique handles 120 mm H speed applications which require large output currents and involve large
amounts of heat generated in the IC by dissipating the motor coil switching loss in external Zener diodes.
4. Output protection when the motor is lock (C, RD, and FG pins)
This circuit detects motor stopping due to, for example, overloading, and cuts the coil current. It also automatically
recovers drive and motor turning from the output stopped state when the load returns to an appropriate level. The lock
detection time is set with the value of an external capacitor.
When C = 0.47 μF
Lock detection time: about 1 second
Lock protection time (output on): about 0.5 second
(output off): about 3 seconds
The RD pin (LB1668) is an open collector output and outputs a low level during drive and a high level when stopped.
The FG pin (LB1667) is an open collector output and is switched between high and low by the drive phase. It goes to
the high level when the motor is stopped.
5. Thermal shutdown
This circuit turns the output off in response to coil shorting or IC overheating.
6. In applications that use an external transistor to turn the cooling fan power on and off, connect a capacitor of about
0.47 to 10 μF between the fan power supply V
CC
and ground to provide a regenerative route for the fan motor coil
current.
No. 4944-5/7
LB1668, LB1668M, LB1667, LB1667M
相關PDF資料 |
PDF描述 |
|---|---|
| LB1669 | 2-Phase Unipolar Brushless Motor Driver |
| LB1669M | 2-Phase Unipolar Brushless Motor Driver |
| LB1670M | Driver for Brushless, Sensorless Motors |
| LB1672 | Brushless-Sensorless Motor Driver |
| LB1672NM | Brushless-Sensorless Motor Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LB1667M-TLM-E | 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 |
| LB1668 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Two-Phase Unipolar Drive Brushless Motor Drivers |
| LB1668_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Two-Phase Unipolar Drive Brushless Motor Drivers |
| LB1668-A-E | 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 |
| LB1668-E | 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 |
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