AM9469

Document number: DS38810 Rev. 2 - 2

3 of 16

www.diodes.com

April 2018

© Diodes Incorporated

AM9469

Pin Descriptions

Pin Number

Pin Name

Description

1

OUT1

Output Drive

– Source and Sink Capable Pin

2

VDD

Power Supply Input Pin

3

REGH

High-Side Regulator Output Voltage

4

5VREG

5V Regulator Output Voltage

5

VCONT

Output duty control pin for in DC signal speed control mode. Voltage in VCONT is compared with triangular

wave on CPWM for the output duty ratio.

6

RMI

Output Minimum Duty (Minimum Speed) Control Pin for CPWM

7

FG

Frequency Generator (FG)

– The FG Output is Same as the Magnetic Change Frequency

8

RD

Rotor Lock Detect Open Drain Output

9

IN1

Hall Device Positive Input Pin

10

HB

Hall Bias Voltage

11

IN2

Hall Device Negative Input Pin

12

CPWM

Capacitor Connection Pin for PWM Oscillator and Main Clock

13

PWM

PWM signal input pin for PWM speed control mode. The PWM on this pin controls the output duty directly.

14

GND

Ground Pin

15

RF

Current Limit Set Pin

– Connect a resistor between RF pin and GND, current limit is defined by 250mV/RF

16

OUT2

Output Drive

– Source and Sink Capable Pin

Pad

Pad

Exposed Pad for Thermal Dissipation. It can be connected to GND or left open circuit.

Functional Block Diagram

1

2

3

4

5

6

7

8

15

16

14

13

12

11

10

9

GND

RF

CPWM

RMI

FG

RD

OUT1

+

+

-

-

VDD

High Side

Regulator

Low Side

Regulator

Bias

Generate

Level Shift

OUT2

OSC&

Clock

PWM

Logical Control

Centre

HB

IN1

IN2

HB

TBD

REGH

5VREG

VCONT