Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Aug., 2016

www.anpec.com.tw

7

APW8707B

Pin Descriptions

PIN

NUMBER

NAME

FUNCTION

1

OCB

Faul t In dication Pin . Th is pin g oes lo w when a curre nt limit co ndition is detected a fter a 1ms

de glitch time.

2

EN

E nable P in. Lo gic h igh ena bles the d evi ce . Log ic low disabl es the device. The p in i s not flo ating.

3

SMO D

S kip Mod e Inp ut. Pull SMO DE h igh to e nte r d iode emul ation or skip mod e.

4 ,2 9

AGND

S ignal G round for The IC. All voltage levels are measure d with respect to this p in. Ti e this pin to the

gro und islan d/plane thro ugh the lowest impe dance connection avail able.

5

OCPCT

O CP De-b ounce Time Control pi n. Placin g a cap aci to r from OCPCT to groun d ca n set a de-b ounce

time fo r o ve r-curren t pro tection, The de -bou nce time can be calculated by fo llowing equ ation:

V

If the OCPCT is not uesd, me aning that the re is no n eed for OCP d ebou nce co ntro l, OCP CT pin

can be le ft o pen.

7 ,2 7

NC

No Conne ctio n.

6

PWM

PW M Drive Logic In put.

8 ,9 ,1 0,11,32

V IN

S upply Volta ge In put P in fo r P ower Stag e.

12,13,14 ,15 ,1 6,

17 ,1 8,1 9

PGND

P owe r g roun d.

20,21,22 ,23 ,2 4,

2 5

L X

Junction Po int of Th e Hig h-side and Lo w- sid e MO SFET. Con nect the output LC filter fo r PW M

ou tp ut voltage.

2 6

BS T

High -Side G ate Driver P owe r Inp ut P in. Conn ect a 0.1uF ca pacito r from BS T to LX .

2 8

V CC

S upply vo lta ge input pin for co ntrol ci rcu itry. De coupli ng at lea st 1uF o f a MLCC capa citor from the

V CC pin to the AGND pin.

3 0

OCSE T

O ver -Cu rrent Setting Input. Con nect a resisto r to GND to set the OCP trip level.