A Product Line of
Diodes Incorporated
AP1685
OFFLINE, HIGH PF, HIGH EFFICIENCY LED DRIVER IC
Description
The AP1685 is a high performance AC/DC power factor corrector for
mains dimmable LED driver applications. The device uses Pulse
Frequency Modulation (PFM) technology to regulate output current
while achieving high power factor and low THD. It operates as a BCM
(Boundary Conduction Mode) which is good for EMI.
The AP1685 internally integrates a 500V high voltage MOSFET which
can realize a lower BOM cost. The AP1685 provides accurate
constant current (CC) regulation while removing the opto-coupler and
secondary control circuitry. It also eliminates the need of loop
compensation circuitry while maintaining stability. It can meet the
requirement of IEC6100-3-2 harmonic standard.
The AP1685 features low start-up current, low operation current. It
adopts valley on switching mode to achieve high efficiency. It also has
rich protection features including over voltage, short circuit, over
temperature protection.
The AP1685 is available in SO-7 package.
Pin Assignments
(Top View)
S
CS
RI
GND
Drain
NEW PRODUCT
VCC
FB
SO-7
Features
Boundary Conduction Mode (BCM) Operation to Achieve High-
efficiency
High PF and Low THD (PF>0.9, THD<30%)
High Efficiency
Low Start-up Current
Tight LED Current
Tight LED Open Voltage
Valley-mode Switching to Minimize the Transition Loss
Internal Integrated 2.5A/500V MOSFET can Cover up to 10W
Easy EMI
Internal Protections:
Under Voltage Lock Out (UVLO)
Leading-edge Blanking (LEB)
Output Short Protection
Output Open Protection
Over Temperature Protection
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device
(Note 3)
Applications
Non-dimmable LED drivers
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html
for more information about Diodes Incorporated’s definitions of Halogen-
and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free
"Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP1685
Document number: DS37311 Rev. 1 - 2
1 of 14
www.diodes.com
September 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP1685
Absolute Maximum Ratings
(Note 4) (@T
A
= +25°C, unless otherwise specified.)
Symbol
V
CC
V
CS
V
FB
Power Supply Voltage
Voltage at CS to GND
FB Input Voltage
Voltage on Drain
Continue Drain Current T
C
= +25
o
C
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
Power Dissipation (T
A
= +50 C)
Thermal Resistance (Junction to Ambient)
ESD (Human Body Model)
ESD (Machine Model)
Parameter
Rating
-0.3 to 35
-0.3 to 7
-40 to 10
500
2.5
-40 to +150
-65 to +150
+300
0.65
160
±2000
±200
Unit
V
V
V
V
A
°C
°C
°C
W
°C/W
V
V
NEW PRODUCT
V
Drain
I
D
T
J
T
STG
T
LEAD
P
D
θ
JA
–
–
Note 4:
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.
Recommended Operating Conditions
Symbol
V
CC
T
A
Power Supply Voltage
Ambient Temperature
Parameter
Min
8
-40
Max
25
+105
Unit
V
°C
AP1685
Document number: DS37311 Rev. 1 - 2
4 of 14
www.diodes.com
September 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP1685
Electrical Characteristics
Symbol
UVLO Section
V
TH
(ST)
V
OPR
(Min)
Start-up Threshold
Minimum Operating Voltage
VCC OVP Voltage
VCC Delatch Voltage (Note 5)
–
After turn on
–
–
13
5.5
27
3
14.5
6.5
29
4
16
7.5
31
5
V
V
V
V
(@T
A
= +25°C, unless otherwise specified.)
Parameter
Conditions
Min
Typ
Max
Unit
NEW PRODUCT
V
CC_OVP
–
Standby Current Section
I
ST
I
CC
(OPR)
Current Sense Section
V
CS_REF
V
CS_CLAMP
t
ONP_MIN
t
D(H-L)
Feedback Input Section
I
FB
V
FB_CV
V
FB_OVP
Internal MOSFET Section
R
DS(ON)
V
BR(Drain)
I
DSS
Output Current
–
Start-up Current
Operating Current
V
CC
= V
TH
(ST)-0.5V,
Before start up
Static
–
–
–
900
20
1300
μA
μA
Current Sense Reference
Current Sense Reference Clamp
Minimum t
ONP
Delay to Output (Note 5)
–
–
–
–
–
1.2
700
50
1
1.4
–
150
–
–
1000
250
V
V
ns
ns
Feedback Pin Input Leakage
Current
FB CV Threshold
FB OVP Threshold
V
FB
= 2V
–
–
–
3.8
4.5
–
4
6
4
4.2
7.5
μA
V
V
Drain-Source On-State Resistance
Drain-Source Breakdown Voltage
Drain-Source Leakage Current
V
GS
= 10V, I
D
= 1.25A
V
GS
= 0V, I
D
= 250μA
V
DS
= 500V, V
GS
= 0V
–
500
–
–
–
–
6
–
1
Ω
V
μA
System Output Current On Final
Test Board
–
–
–
±2
%
Over Temperature Protection Section
–
–
Shutdown Temperature (Note 5)
Temperature Hysteresis (Note 5)
–
–
+150
–
–
+20
–
–
°C
°C
Note 5: These parameters, although guaranteed by design, are not 100% tested in production.
.
AP1685
Document number: DS37311 Rev. 1 - 2
5 of 14
www.diodes.com
September 2014
© Diodes Incorporated
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