Diodes AP3616 - Manual (Page 3)

SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
Data Sheet
3
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
9 16 FLAG
Error flag pin. When LED load goes to error (short or open ), the flag
open drain output will close
10 17 FB
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
11 18 FBX
This pin is an interface terminal. Connect it to FB pin can achieve
parallel application. If not used, leave it unconnected
12 19 EN Enable pin. Logic high enables the IC and logic low disables the IC
13 20 VIN Input voltage pin
14 21 GND Ground pin
15 22 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
16 23 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
17 24 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
18 25 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
19 26 SCP
LED short trigger voltage setting pin. This pin is used to set the LED
short circuit protection voltage level
20 27 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