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參數(shù)資料
| 型號(hào)： | LB1999M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Three-Phase Brushless Motor Driver for VCR Capstan Motors |
| 中文描述： | 三相無(wú)刷電機(jī)錄像機(jī)絞盤馬達(dá)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大小： | 119K |
| 代理商： | LB1999M |
Continued from preceeding page.
Pin Assignment
Pin No.
21
Pin
V
S
Function
Equivalent circuit
No. 5975-5/8
LB1999M
Output block power supply
23
31
Rf (PWR)
Rf (SNS)
Output current detection. The control block current limiter
operates using the resistor Rf connected between these pins
and ground. Also, the lower side saturation prevention circuit
and the torque ripple correction circuit operate based on the
voltages to this pin. It is especially important to note that,
since the saturation prevention level is set using this voltage,
the lower side saturation prevention circuit will become less
effective in the large current region if the value of Rf is
lowered excessively. Also, the PWR and SENSE pins must
be connected together.
26
27
28
U
OUT
V
OUT
W
OUT
U phase output
V phase output
W phase output
(Spark killer diodes are built-in.)
32
GSENSE
Ground sensing. The influence of the common ground
impedance on Rf can be excluded by connecting this pin to
nearest ground for the Rf resistor side of the motor ground
wiring that includes Rf. (This pin must not be left open.)
33
FR
Forward/reverse selection. The voltage applied to this pin
selects the motor direction (forward or reverse).
(Vth = 2.5 V at V
CC
= 5 V (typical))
Note: Although the FRAME pins and
the GND pins are not connected
internally, the potentials of the
GND pins and the FRAME pins
externally be identical to assure
ground potential stability.
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