Pin description – Diodes AP3616 User Manual

Page 3

SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616

Data Sheet

BCD Semiconductor Manufacturing Limited

Jul. 2012 Rev. 1. 2

Pin Number

Pin Name

Function

SOIC-28

HSOP-28

1 to 8

28 to 21

1 to 8

9 to 15 & 28

CH1 to CH8

CH9 to CH16

White LED cathode connection pins. If not used, leave them uncon-
nected

FLAG

Error flag pin. When LED load goes to error (short or open ), the flag
open drain output will close

Feedback pin. This pin is an interface terminal, which samples the
voltage of each channel, and outputs the lowest voltage of the string
to DC/DC converter

FBX

This pin is an interface terminal. Connect it to FB pin can achieve
parallel application. If not used, leave it unconnected

Enable pin. Logic high enables the IC and logic low disables the IC

VIN

Input voltage pin

GND

Ground pin

ISET

LED current setting pin. An external resistor is connected to this pin.
Current on each channel can be expressed by I

CHAN-

NEL

=1.194*1560/R

ISET

DIM

Dimming control pin. Adding a PWM signal or DC signal to this pin
to control LED dimming. Connect it to high voltage level if not used

SYNF

Synchronous PWM frequency setting pin. A nF level of capacitor
should be connected to this pin to set PWM frequency at about 80Hz
to 25kHz

SYN

PWM dimming synchronous pin, this pin outputs DC transformed
PWM signal to synchronize parallel AP3616 and power converter, if
not used, leave it unconnected

SCP

LED short trigger voltage setting pin. This pin is used to set the LED
short circuit protection voltage level

OVP

This pin is used to trigger OVP condition. OVP triggering voltage
should be lower than the OVP voltage of its cascade chip, such as ,
AP3039A in Figure 19

Pin Description