FAN8420D3 Ver la hoja de datos (PDF) - Fairchild Semiconductor

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componentes Descripción

Fabricante

FAN8420D3

3-Phase BLDC Motor Driver

Fairchild Semiconductor 

Electrical Characteristics (Continued)

1. Calculation Of Gain & Torque Limit Current

FAN8420D3

VM

EC

ECR

+

Gm

−

Current / Voltage

Convertor

−

Vin

+

Absolute

Values

Negative

Feedback loop

R1

−

+ Driver

+

+

Vmax

−

VM

Max. output current limiting

0.355 is GM times R1 and is a fixed value within IC.

Gain

=

0----.--3---5---5--

RS

[

A

⁄

V

]

VM

IO

RS

−

VS

Output

Current sense

+

CS1 (Pin 28)

Power

Transistors

U IO

V

W

Commutation

Distributor

H1 H2 H3

Vmax (see above block diagram) is set at 350mV.

Itl = -V----m-----a----x- = -3---5---0----[--m------V----]

RS

RS

Rev. 1.0.1

7

Oct. 2000.

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