Diodes AP3616 User Manual
Data Sheet
SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
General Description
The AP3616 is an sixteen-channel constant current
sink with current match used for LED driver. It uses an
external resistor to set the current for sixteen LED
strings with an accuracy of ±1.5%. The full scale LED
current can be adjusted from 20mA to 75mA for each
channel. The LED lightness can be adjusted by PWM
dimming function.
The device can keep working normally without any
damage when LEDs are short or open. It features under
voltage lockout protection and over temperature protection.
The AP3616 has three interface terminals (FB, SYN
and FBX pins). The FB and SYN pins allow the device
to work with a DC/DC converter to drive LED arrays
for good performance. And the FBX pin enables the
device to be connected in parallel.
The AP3616 is available in SOIC-28 and HSOP-28
packages.
Features
· Input Voltage Range: 4.2V to 27V
· Maximum Output Current: Typical 1.2A (75mA
per Channel)
· Current Match Accuracy (Typical): ±1.5%
· PWM / Linear Dimming Control
· Open LED Self-check and Protection
· Flexible Short LED Protection
· Under Voltage Lockout Protection
· Over Temperature Protection
· FBX and SYN Pins Enable Parallel Application
· Over Voltage Protection
Applications
· LCD Display Modules
· LCD Monitor
· LCD TV
SOIC-28 HSOP-28
Figure 1. Package Types of AP3616
BCD Semiconductor Manufacturing LimitedJul. 2012 Rev. 1. 2
1
Data Sheet
SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
Pin Configuration
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
FLAG
FB
FBX
EN
VIN
GND
10
11
12
13
14
M Package
(SOIC-28)
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CH9
CH10
CH11
CH12
CH13
CH14
CH15
CH16
OVP
SCP
SYN
SYNF
DIM
ISET
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
M28 Package
(HSOP-28)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CH16
OVP
SCP
SYN
SYNF
DIM
ISET
GND
VIN
EN
FBX
FB
FLAG
CH15
Figure 2. Pin Configuration of AP3616 (Top View)
BCD Semiconductor Manufacturing LimitedJul. 2012 Rev. 1. 2
2
Data Sheet
SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
Pin Description
Pin Number
Pin Name Function
SOIC-28 HSOP-28
1 to 8
28 to 21
916FLAG
10 17 FB
11 18 FBX
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
16 23 DIM
17 24 SYNF
1 to 8
9 to 15 & 28
CH1 to CH8
CH9 to CH16
White LED cathode connection pins. If not used, leave them unconnected
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
This pin is an interface terminal. Connect it to FB pin can achieve
parallel application. If not used, leave it unconnected
LED current setting pin. An external resistor is connected to this pin.
Current on each channel can be expressed by I
=1.194*1560/R
NEL
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
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
ISET
CHAN-
18 25 SYN
19 26 SCP
20 27 OVP
PWM dimming synchronous pin, this pin outputs DC transformed
PWM signal to synchronize parallel AP3616 and power converter, if
not used, leave it unconnected
LED short trigger voltage setting pin. This pin is used to set the LED
short circuit protection voltage level
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
BCD Semiconductor Manufacturing LimitedJul. 2012 Rev. 1. 2
3
Data Sheet
SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
Functional Block Diagram
CH1_I
CH1
CH16
FLAG
FB
FBX
EN
(
1
1
8
8
28
9
21
15
&
28
9(16)
10(17)
11(18)
12(19)
(
VCH 16 to 1
REF
VDD
SCP
200mV
V
DS1=VDD
Open LED
Short LED
LOW
SEL
EN
Bandgap
VDS1
x3120
AMP
x7
PGND
x1
µ
2 A
AGND
x1
AGND
COMP
Short
Detectio n
COMP
Open
Detectio n
OVP_EN
SCP
V
1.194V
REF
COMP
V
=5V
DD
_
VDD
+
COMP
0.26V
V
REF
SCP Open
Detect ion
+
_
COMP
20(27)
OVP
19(26)
SCP
18(25)
SYN
16(23)
Latch
Block
UVLO
PWM
COMP
µ
13 A
+_2.2V
_
SET
RS
Q_BAR
RESET
V
REF
VDD
Regula tor
AMP
COMP
+
0.5V
COMP
µ
13 A
x4
x1
x4
17(24)
DIM
SYNF
13(20)
VIN
14(21)
GND
A(B)
A for SOIC-28
B fro HSOP-28
CH_I
AGND
PGND
Figure 3. Functional Block Diagram of AP3616
4
1 to 16
REF
15(22)
ISET
BCD Semiconductor Manufacturing LimitedJul. 2012 Rev. 1. 2
Data Sheet
SIXTEEN-CHANNEL, 75mA CURRENT SINK WITH CURRENT MATCH AP3616
Ordering Information
AP3616 -
Circuit Type
Package
M: SOIC-28
G1: Green
Blank: Tube
M28:HSOP-28
Package Temperature Range Part Number Marking ID Packing Type
SOIC-28
HSOP-28 AP3616M28-G1 AP3616M28-G1
-40 to 85
o
C
AP3616M-G1 AP3616M-G1 Tube
Tube
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Input Voltage V
FLAG Pin Voltage V
EN Pin Voltage V
Voltage on Each Channel V
IN
FLAG
EN
CHX
Voltage on Other Seperate Pins -0.3 to 6 V
Thermal Resistance (Junction to
Ambient, No Heat Sink)
Operating Junction Temperature T
Lead Temperature (Soldering, 10sec)
SOIC-28
HSOP-28 59
T
θ
STG
JA
J
ESD (Human Body Model) 2000 V
ESD (Machine Model) 200 V
30 V
30 V
30 V
-0.3 to 60 V
72
o
o
150
-65 to 150
C/W
C/W
o
C
o
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Jul. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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