PAM8906

Document number: DS44739 Rev. 1 - 2

2 of 11

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December 2022

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PAM8906

Typical Application Circuits

(I) External PWM Input:

VIN

GND

2.1V to 5.5V

PAM8906

BOOT SW

10µF

0.47µH

0.1µF

1µF

VCC

DIN

1µF

VOUT

FB

1µF

1

9

8

10

3

4

5

2

OUTP

OUTN

7

6

PWM input

Option

1A 20V

(II) Self-Excitation Mode for Applications like Smoke/Gas Alarms (10V and 12V Versions Only):

VIN

GND

2.1V to 5.5V

PAM8906

BOOT SW

10µF

0.47µH

0.1µF

1µF

VCC

DIN

1µF

VOUT

OFF

ON

FB

OUTP

OUTN

M

F

G

150K

1nF

1.5M

1µF

1

9

8

10

3

4

5

7

6

2

Option

1A 20V

(III) 9V Battery Alarms (Showing the 10V Version):

GND

PAM8906

1µF

VCC

DIN

1µF

VOUT

FB

1

9

8

5

2

OUTP

OUTN

7

6

PWM input

VIN

2.1V to 5.5V

BOOT SW

1µF

10

3

4

7V to 15V

VIN

GND

2.1V to 5.5V

PAM8906

BOOT SW

1µF

VCC

DIN

1µF

VOUT

OFF

ON

FB

OUTP

OUTN

M

F

G

150K

1nF

1.5M

1µF

1

9

8

10

3

4

5

7

6

2

7V to 15V

External PWM Drive

Self-Excitation Mode with DIN as High to Enable

150k

150k