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參數(shù)資料
| 型號： | LB11875 |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDSO36 |
| 封裝： | 0.275 INCH, SSOP-36 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 164K |
| 代理商： | LB11875 |
No. 7678-6/16
LB11875
Pin Functions
Pin
Pin No.
Descriptions
CLK
1
Clock Input pin
FGS
2
FG Schmitt trigger output. This is an open collector output.
LD
3
Lock detection output. This pin goes to the on state when the PLL phase is locked. This is an open collector output.
S/S
4
Start/stop command input. Low: start, high or open: stop.
CLKSEL
5
Clock divisor selection. Low: 2, high or open: 1
BRSEL
6
Brake control input. Low: short-circuit brake mode, high or open: free running
F/R
7
Forward/reverse selection. Low: forward, high or open: reverse
PD
8
Phase comparator output. Outputs the phase error converted to a pulse duty.
EI
9
Error amplifier input
EO
10
Error amplifier output
TOC
11
Torque command input. This pin is normally connected to the EO pin. When the potential on the TOC pin falls, the UH, VH, and
WH PWM duty is changed and the torque is increased.
NC
12
No connect pin. Since this pin is not connected to the chip itself, it can be used for connections in the application circuit.
PWM
13
Sets the PWM oscillator frequency. Insert a capacitor between this pin and ground.
CLD
14
Sets the phase clock signal mask time. Insert a capacitor between this pin and ground.
Leave this pin open if masking is not needed.
CSD
15
Sets the constraint protection circuit operating time as well as the initial reset pulse. Insert a capacitor between this pin and
ground.
Insert a resistor in parallel with the capacitor if the constraint protection circuit is not used.
VREG
16
5 V regulator output (used as the control circuit power supply). Insert a capacitor between this pin and ground for stabilization.
V13
17
13 V shunt regulator output
LVSD
18
Undervoltage protection circuit voltage detection. To detect a voltage of 5 V or higher, set the detection voltage by inserting a
zener diode in series.
VCC
19
Power supply (used by the outputs and the regulator circuits). Insert a capacitor between this pin and ground so that noise does
not enter the IC. Short this pin to VREG if a 5 V single-voltage power supply system is used.
GND
20
Ground
RFGND
21
Output current detection reference
RF
22
Output current detection. The maximum output current IOUT will be 0.25/Rf.
UH
27
Outputs (push-pull outputs)
VH
25
The duty is controlled by the PWM circuit.
WH
23
UL
28
VL
26
Outputs (push-pull outputs)
WL
24
IN1+, IN1–
34, 33
Hall sensor signal inputs for the three phases.
IN2+, IN2–
32, 31
The logic high state indicates the state VIN+ > VIN–.
IN3+, IN3–
30, 29
FG IN+
36
FG comparator noninverting input
FG IN–
35
FG comparator inverting input
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