LB1999M データシートの表示（PDF） - SANYO -> Panasonic

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LB1999M

Three-Phase Brushless Motor Driver for VCR Capstan Motors

SANYO -> Panasonic 

LB1999M

Control Function and Current Limiter Function

Slope: 0.50 A/V (typical)

Control Characteristics

Control Limiter Characteristics

Pin Descriptions

Pin No.

Pin

Function

Input used when the FG amplifier is used as an inverting

3

FGIN+

input. A feedback resistor must be connected between FGOUT

and this pin.

4

FGIN–

Noninverting input used when the FG amplifier is used as a

differential input amplifier. No bias is applied internally.

5

FGOUT

FG amplifier output. There is an internal resistive load.

Control reference voltage. While this pin is set to about

6

FGS

0.43 × VCC internally, this voltage can be modified by

applying a voltage from a low-impedance circuit.

(The input impedance is about 4.3 kΩ).

9

FC

Speed control loop frequency characteristics correction.

Speed control input. The control implemented is fixed current

7

CTL

drive controlled by current feedback from Rf.

Gm = 0.58/V (typical) when Rf = 0.5 Ω.

Current limiter function control. The output current can be

8

LIM

varied linearly by applying a voltage to this pin.

The slope is 0.5 A/V (typical) when Rf = 0.5 Ω.

10

UIN+

U phase Hall element inputs.

11

UIN–

Logic high is defined as states where IN+ > IN–.

12

VIN+

V phase Hall element inputs.

13

VIN–

Logic high is defined as states where IN+ > IN–.

14

WIN+

W phase Hall element inputs.

15

WIN–

Logic high is defined as states where IN+ > IN–.

Power supply for all internal blocks other than the output

16

VCC

block. This voltage must be stabilized so that noise and ripple

do not enter the IC.

Equivalent circuit

Continued on next page.

No. 5975-4/8

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