LB1877M

No. 6199-3/7

Pin Function

Pin number Pin name

Function

20

UOUT

U-phase output

1

VOUT

V-phase output

2

WOUT

W-phase output

6

UB

U-phase base of 3-phase differential

5

VB

V-phase base of 3-phase differential

4

WB

W-phase base of 3-phase differential

18

VCC

Power supply

7

OSC

Startup oscillator pin

8

COM

Output waveform detection comparator voltage

3

P – GND

Output transistor and predriver ground

9

GND

Ground pin

11

S/S

Start/stop pin

19

DR

Forward/reverse pin

12

VREF

Reference voltage 0.9V

14

VSP

Output waveform peak detection pin

13

IN+

Error amp non-inverted pin

15

OUT

Error amp output pin

10

RI

Current feedback resistor connection pin

16

FC

Frequency response adjustment pin

17

LB

Motor start lockup prevention. Connect to GND via capacitor

Pin Assignment

20

19

18

17

16

15

14

13

12

11

RI

COM

OSC

GND

UB

VSP

VREF

IN+

S/S

OUT

FC

LB

VCC

DR

UOUT

LB1877M

VB

WB

WOUT

VOUT

PGND

1

2

3

4

5

6

7

8

9

10

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