LB1854 データシートの表示（PDF） - SANYO -> Panasonic

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LB1854

Three-Phase Brushless Motor Driver IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No. Symbol

Pin voltage

7

UOUT

8

VOUT

9

WOUT

10

Rf

11

VCC2 4.3 to 6.5 V

0 V min

12

CL

VCC2 max

LB1854M

Equivalent circuit

Function

Unit (resistance: Ω)

Output pins

Output transistor ground

Feedback can be applied to the control amplifier by

inserting resistor between this pin and GND and detecting

the output current as a voltage. The overcurrent

protection circuit (current limiter) operates by detecting

the voltage on this pin.

Power supply provided to all blocks other than the output

block

This voltage must be stabilized so that no ripple or other

noise is present.

The current limiter operates when the Rf pin reaches the

same potential as pin 12. The pin 12 potential is set up

externally.

0 V min

13

GC

VCC2 max

18

FGOUT2

Control input to output gain switching pin

High level (4 to 5 V): 34 dB

Middle level (2 to 3 V) or open: 40 dB (low speed):

34 dB (high speed)

Low level (0 to 1 V): 40 dB

However, note that this applies when VCC2 is 5 V.

FG Schmitt amplifier output

19

FGOUT1

FG amplifier output

Continued on next page.

No. 4476-5/6

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