Datasheet > A5936GLKTR-T

A5936GLKTR-T

更新时间： 2022-02-26 11:59:44

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描述
Three Phase Sensorless Sinusoidal Fan Driver

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A5936GLKTR-T 数据手册

A5936

Three Phase Sensorless Sinusoidal Fan Driver

Startup Adjustment

Various permutations of startup parameters are chosen via lookup

table with A/D conversion.

VREF

DMD

Parameter

Look Up

Table

Mux

Select

Control

Logic

Sixteen choices of startup parameters are selected by applying

voltage at pin ACC.

Choose resistor divider ratio from the table below. The circuit

compensates for minor variation of V_REF. It is recommended to

select R1+R2 in range 10 to 200 kΩ. ACC must be connected to

a voltage between VREF and GND and should not be left open

circuit.

VREF

0...15

ACC

A/D

The parameters are loaded at power-on. When testing, V_BBmust

be powercycled to check new values.

Figure 4

V_INIT(V)

Max.

Electrical

Resistor

Ratio

Standard

Values (kΩ)

Standard

Values (kΩ)

Acceleration

(Hz/s)

During Open During Open

Loop

(DMD = HI)

ACC

Code

Loop

(DMD = LO)

Frequency

(Hz)

(R2/R1+R2)

GND

0.322

0.644

0.966

1.288

1.610

1.932

2.254

V_REF

n/a

90.9

34.8

102

9.09

11.5

2.8

n/a

11.5

3.1

5.1

500

1000

0.112

0.223

0.335

0.446

0.558

0.669

0.781

n/a

51.1

11.5

23.2

10.9

14.8

18.8

26.6

n/a

Note: ACC Target voltages based on V_REFof 2.885 V

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

1...4 5 678 9 10...12

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