LB1857 查看數據表（PDF） - SANYO -> Panasonic

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LB1857

Three-Phase Brushless Motor Driver IC

SANYO -> Panasonic 

Pin Functions

Pin No.

4

Symbol

VS

Pin voltage

≤ VCC2

5

VCC2 4 to 14 V

6

VCC1 4 to 6 V

7

ST. BY (H): 0.1 V max

(L): 2.0 V min

(When VCC1 is 5 V)

LB1857M

Equivalent circuit

Unit (resistance: Ω)

Pin function

Power supply input that determines the output

amplitude. It must be set to a voltage equal or

lower than VCC2.

Power supply for power amplifier systems other

than motor drive transistors. Power supply pin

that provides voltage for blocks other than control

blocks supplied by VCC1.

Power supply that provides voltage for the Hall

amplifier, the forward/reverse circuit, the FG

amplifier, and the thermal shutdown circuit.

All circuits can be made inoperative either by

connecting this pin to GND, or by leaving it open.

In that state the supply current will be

approximately 100 µA. Hold at 2 V or higher

during normal operation.

8

ANGLE

Connect a resistor between this pin and GND.

Changing the value of this resistor will change the

Hall input-output gain (motor waveform slope).

10

FGIN– 0 V min

11

FGIN+ 3.5 V max

(When VCC1 is 5 V)

FG signal input pin

12

FGOUT1

FG amplifier output pin

Continued on next page

No. 3976-4/6

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