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參數(shù)資料
| 型號： | LB1876 |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2.5 A, PDSO36 |
| 封裝： | 0.375 INCH, HSOP-36 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 163K |
| 代理商： | LB1876 |
LB1876
No.6201-6/12
Pin Function
Pin No.
Pin name
Function
Equivalent curcuit
2
1
36
OUT1
OUT2
OUT3
Motor drive output pins.
PWM controls duty cycle ratio by lower transistors.
Connect Schottky diodes between the outputs and VCC.
34
GND3
Output block ground.
28
29
VM1
VM2
Output block power supply and output current detection.
VM1 and VM2 are short-circuited and used.
Connect low-resistance resistors Rf between these pins and
VCC.
The output current is limited to the current value set by IOUT
= VREF/Rf.
1 2 36
34
28
VM1
29
VM2
VCC
300
3
35
NC
Since these are not connected internally, they can be used
for wiring.
8
9
6
7
4
5
IN1+
IN1
IN2+
IN2
IN3+
IN3
Hall device input pins.
These inputs return a high level when IN+ > IN and a low
level when IN > IN+.
A Hall signal amplitude of at least 100mVp-p (differential) is
desirable. Insert a capacitor between IN+ and IN if noise on
the Hall signal is a problem.
5 7 9
VREG
300
300
4 6 8
10
11
FGIN+
FGIN
FG comparator input pins.
If noise on the FG signal is a problem, insert either a
capacitor or a filter consisting of a capacitor and a resistor.
11
VREG
300
300
10
12
GND1
Control circuit block ground.
13
GND2
Sub-ground.
14
PWM
PWM oscillation frequency setting pin.
Connect a capacitor between this pin and ground.
A capacitance of 1800pF for C sets the frequency to
approximately 37kHz.
14
VREG
200
2k
15
FC
Current control circuit frequency characteristics
compensation pin.
Insert a capacitor (on the order of 0.01 to 0.1
F) between
this pin and ground.
The output duty is determined by the ratio of the voltage on
this pin and the PWM oscillator waveform.
15
VREG
300
Continued on next page.
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