AP1688

A Product Line of
Diodes Incorporated
AP1688
Description
Features
The AP1688 is a high performance AC/DC PFC and constant current
controller for universal mains LED driver applications. The device is a
buck controller which operates as a boundary conduction mode
(BCM) to achieve high efficiency and easy EMI.
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An open loop algorithm is adopted in the AP1688, which will make the
system achieve excellent line and load regulations with high PF for
universal mains input.
The AP1688 features fast start-up, low start-up current, low operation
current and high efficiency. It also has rich protection features
including over voltage, short and open circuit, over current, over
temperature protection.
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The AP1688 is available in SO-8 package.
Pin Assignments
(Top View)
NC
1
8
VCC
VS
2
7
OUT
VA
3
6
GND
CS
4
5
FB
Optimized for Buck Topology
Boundary Conduction Mode (BCM) Operation to Achieve High
Efficiency
High Power Factor > 0.9
High Efficiency > 90%
System Current Accuracy: ±5%
Good Line Regulation and Load Regulation
Low Start-up Current
Tight CC Regulation Performance for Universal Input Mains
Voltage Range
Eliminates Control Loop Compensation Circuitry
Easy EMI
Open-load and Reload Detection
Over Temperature Protection
Over Current Protection
Over Voltage and Short and Open Circuit Protection
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications

Universal Mains LED lighting
(SO-8/ M Package)
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.
Typical Applications Circuit
L1
BD1
C1
VAC
+
C2
D1
TVS
T1
D2
C3
8
2
R7
C5
Document number: DS36603 Rev. 2 - 2
R6
3
C6
VS
FB
5
R3
R4
OUT
CS
VA
-
R2
VCC
R5
AP1688
VOUT
C4
R1
L2
AP1688
NEW PRODUCT
AC/DC, HIGH PF, HIGH EFFICIENCY, UNIVERSAL MAINS LED DRIVER CONTROLLER
GND
6
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Q1
7
4
R CS
February 2015
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP1688
Pin Descriptions
Pin Name
1
NC
No connection
2
VS
Detects the negative terminal voltage of output.
3
VA
Detects the average value of the negative terminal voltage of output.
4
CS
Primary current sensing
5
FB
The feedback voltage sensing from the auxiliary winding
6
GND
Ground
7
OUT
Gate driver output
8
VCC
Supply voltage of gate driver and control circuits of the IC
NEW PRODUCT
Pin Number
Function
Functional Block Diagram
VCC
8
FB
UVLO
5
0.1V
-
OVP
ZCD
Detector
COMP
+
pro
Regulator
& Bias
ZCD
+
1.75V
-
UVLO
R
EA
Q CV_CTRL
Driver
7
OUT
S
CS
VS
Peak Current Control &
LEB
4
2
Input Current
Shaping and
Constant
Current Control
R
S
Q
6
GND
3
VA
AP1688
Document number: DS36603 Rev. 2 - 2
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© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP1688
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified. Note 4)
Symbol
NEW PRODUCT
Rating
Unit
VCC
Power Supply Voltage
-0.3 to 40
V
IOUT
Driver Output Current
300
mA
Voltage at VS, VA, CS to GND
-0.3 to 7
V
FB Input Voltage
-40 to 10
V
+150
°C
-65 to +150
°C
VVS, VVA, VCS
VFB
TJ
Note 4:
Parameter
Operating Junction Temperature
TSTG
Storage Temperature
TLEAD
Lead Temperature (Soldering, 10 sec)
+300
°C
PD
Power Dissipation (TA = +50°C)
0.65
W
θJA
Thermal Resistance (Junction to Ambient)
190
°C/W
–
ESD (Human Body Model)
3000
V
–
ESD (Machine Model)
200
V
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
Parameter
Min
Max
Unit
VCC
Power Supply Voltage
12
21
V
TA
Ambient Temperature
-40
+105
°C
AP1688
Document number: DS36603 Rev. 2 - 2
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© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP1688
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
UVLO Section
VTH (ST)
NEW PRODUCT
VOPR (Min)
VCC_OVP
Start-up Threshold
–
18
19
20
V
Minimum Operating Voltage
After turn on
7
8
9
V
VCC OVP Voltage
–
28
32
36
V
–
–
20
µA
–
1000
1300
µA
10
–
–
V
–
–
1
V
Standby Current Section
IST
ICC (OPR)
VCC = VTH (ST)-0.5V,
Start-up Current
Before start up
Operating Current
Static
Drive Output Section
IGD_SOURCE = 20mA
VCC = 12V
IGD_SINK = 20mA
VCC = 12V
VOH
Output High Level Voltage
VOL
Output Low Level Voltage
tR
Output Voltage Rise Time
CL = 1nF
100
140
190
ns
tF
Output Voltage Fall Time
CL = 1nF
30
60
90
ns
12
13.5
15
V
–
–
1.1
V
VO_CLAMP
VUVLO
IGD_SOURCE = 5mA
VCC = 20V
VCC = 0 to VCC_ON
ISINK = 10mA
Output Clamp Voltage
UVLO Saturation Voltage
Current Sense Section
Minimum On Time
–
500
1000
1500
ns
Short Circuit Protection
Voltage
–
3
4
–
V
FB Pin Input Leakage Current
VFB = 4V
–
2
8
µA
VFB (CV)
CV Threshold
–
3.8
4.0
4.2
V
VFB (OVP)
Over Voltage Protection
–
4.5
6
7.5
V
VVS/VVA (Max)
Maximum Ratio
VVS = VVA = 3V
0.8
1
1.2
V
VVS/VVA (Min)
Minimum Ratio
VVS = 0V, VVA = 3V
–
–
0.2
V
tON (Min)
VSOCP
Feedback Input Section
IFB
VS Input Section
Over Temperature Protection Section
–
Shutdown Temperature
–
–
+170
–
°C
–
Temperature Hysteresis
–
–
+20
–
°C
AP1688
Document number: DS36603 Rev. 2 - 2
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A Product Line of
Diodes Incorporated
AP1688
Performance Characteristics
Supply Current vs. Supply Voltage
CV Threshold vs. Supply Voltage
4.2
1200
1100
4.1
CV Threshold (V)
Supply Current (A)
900
800
700
600
500
400
4.0
3.9
3.8
300
3.7
200
100
0
3.6
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
8
10
12
14
Output Clamp Voltage vs. Supply Voltage
18
20
22
24
26
28
30
Start-up Voltage vs. Ambient Temperature
15
19.4
14
19.2
13
Start-up Voltage (V)
Output Clamp Voltage (V)
16
Supply Voltage (V)
Supply Voltage (V)
12
11
10
9
8
19.0
18.8
18.6
18.4
7
18.2
6
5
8
10
12
14
16
18
20
22
24
26
28
18.0
-40
30
-20
0
20
40
60
80
100
120
o
Supply Voltage (V)
Ambient Temperature ( C)
Minimal Operating Voltage vs. Ambient Temperature
Start-up Current vs. Ambient Temperature
8.0
8.2
7.5
8.1
7.0
Start-up Current (A)
Minimal Operating Voltage (V)
NEW PRODUCT
1000
8.0
7.9
7.8
7.7
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
7.6
2.5
7.5
-40
-20
0
20
40
60
80
100
120
o
Document number: DS36603 Rev. 2 - 2
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
AP1688
2.0
-40
Ambient Temperature ( C)
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A Product Line of
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AP1688
Performance Characteristics
(Cont.)
Operating Current vs. Ambient Temperature
CV Threshold vs. Ambient Temperature
1250
5.0
4.8
1200
CV Threshold (V)
Operating Current (A)
1100
1050
1000
4.4
4.2
4.0
3.8
3.6
950
3.4
900
850
-40
3.2
-20
0
20
40
60
80
100
3.0
-40
120
o
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
Ambient Temperature ( C)
FB Leakage Current vs. Ambient Temperature
4.0
FB Input Leakage Current (A)
NEW PRODUCT
4.6
1150
3.5
3.0
2.5
2.0
1.5
1.0
-40
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
AP1688
Document number: DS36603 Rev. 2 - 2
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A Product Line of
Diodes Incorporated
AP1688
Ordering Information
AP1688 X XX – G1
NEW PRODUCT
Product Name
RoHS /Green
Package
Packing
M : SO-8
TR : Tape & Reel
G1 : Green
Diodes IC’s Pb-free products with "G1" suffix in the part number, are RoHS compliant and green.
Temperature
Package
Range
SO-8
-40 to +105°C
Part Number
Marking ID
Packing
AP1688MTR-G1
1688M-G1
4000/13’’Tape & Reel
Marking Information
(Top View)
1688
M-G1
YWWAXX
AP1688
Document number: DS36603 Rev. 2 - 2
First and Second Lines: Logo and Marking ID
(See Ordering Information)
Third Line: Date Code
Y: Year
WW: Work Week of Molding
A: Assembly House Code
XX: 7th and8th Digits of Batch No
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A Product Line of
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AP1688
Package Outline Dimensions (All dimensions in mm(inch).)
(1)
Package Type: SO-8
4.700(0.185)
5.100(0.201)
7°
0.320(0. 013)
TYP
1.350(0. 053)
1.750(0. 069)
NEW PRODUCT
8°
7°
0.675(0. 027)
0.725(0. 029)
8°
D
5.800(0. 228)
6.200(0. 244)
1.270(0. 050)
TYP
D
20:1
0.300(0. 012)
R0.150(0.006)
0.100(0. 004)
1.000(0.039)
TYP
Option 1
0°
8°
3.800(0.150)
4.000(0.157)
Option 1
0.300(0. 012)
0.510(0. 020)
0.150(0. 006)
0.250(0. 010)
0.900(0.035)
TYP
Option 2
1°
7°
R0.150(0.006)
0. 450(0. 017)
0. 800(0. 031)
0.350(0.014)
TYP
Note: Eject hole , oriented hole and mold mark is optional .
AP1688
Document number: DS36603 Rev. 2 - 2
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A Product Line of
Diodes Incorporated
AP1688
Suggested Pad Layout
Package Type: SO-8
NEW PRODUCT
(1)
Grid
placement
courtyard
G
Z
Y
E
X
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E
(mm)/(inch)
Value
6.900/0.272
3.900/0.154
0.650/0.026
1.500/0.059
1.270/0.050
AP1688
Document number: DS36603 Rev. 2 - 2
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© Diodes Incorporated
A Product Line of
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AP1688
IMPORTANT NOTICE
NEW PRODUCT
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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AP1688
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