Page 1
AP4320
Document number: DS36786 Rev. 2 - 2
1 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
Description
The AP4320 is a highly integrated solution for a constant
voltage/constant current mode SMPS application.
The AP4320 contains one 2.5V voltage reference and two operational
amplifiers. The 2.5V voltage reference, combined with one
operational amplifier, makes of an ideal voltage controller for use in
adapters and battery chargers. The low voltage reference, combined
with another operational amplifier, makes of an ideal current limiter for
output low side current sensing.
The AP4320 is available in SOT26 package.
Features
Constant Voltage and Constant Current Control
Low External Component Count
Easy Compensation
Low Supply Current: 190A
Precision Internal Voltage Reference: 2.5V
Operating Supply Voltage: 3.5V to 36V
Low Current Sense Threshold: 30mV/50mV
Totally Lead-free & Fully RoHS Compliant (Note 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
1
2
3 4
5
Pin 1 Mark
6
V
SENSE
GND
V
CTRL
I
CTRL
V
OUT
V
CC
SOT26 (K6 Package)
Applications
AC/DC Adapters
Battery Chargers
LED Drivers
V
CC
V
OUT
GND
V
SENSE
I
CTRL
R
SS
R4
To
primary
R2
R1
V
OUT
+
V
OUT
-
Load
C1
R3
C3
R5
R6
V
CTRL
AP4320
+
+
I
L
2.5V
C2
(Optional)
OP1
OP2
1
2
3
4
5
6
121R
RR
VV
REFOUT
SS
SENSE
R
V
itCurrentLim
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
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
Typical Application 1
Page 2
AP4320
Document number: DS36786 Rev. 2 - 2
2 of 11
www.diodes.com
December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
V
CC
V
OUT
GND
V
SENSE
I
CTRL
R
SS
R4
To
primary
R2
R1
V
OUT
+
V
OUT
-
Load
C1
R3
C3
R5
R6
V
CTRL
AP4320
+
+
I
L
2.5V
C2
(Optional)
OP1
OP2
1
2
3
4
5
6
)(
1
21
)]([
SSLSSLREF
UT
O
RI
R
RR
RIVV
SS
SENSE
R
V
itCurrentLim
V
CC
V
OUT
GND
V
SENSE
I
CTRL
R
SS
R4
To
primary
R2
R1
V
OUT
+
V
OUT
-
Load
C1
R3
C3
R5
R6
V
CTRL
AP4320
+
+
I
L
2.5V
C2
(Optional)
OP2
OP1
1
2
3
4
5
6
)(
1
21
SSLREFOUT
RI
R
RR
VV
SSREFSENSE
REFSENSE
RVV
VV
itCurrentLim
Typical Applications Circuit (Cont.)
Typical Application 2
Typical Application 3
Page 3
AP4320
Document number: DS36786 Rev. 2 - 2
3 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
Pin Number
Pin Name
Function
1
V
SENSE
Input pin of the current control loop
2
GND
Ground
3
V
CTRL
Input pin of the voltage control loop
4
I
CTRL
Input pin of the current control loop
5
V
OUT
Output pin. Sinking current only
6
VCC
Power Supply
4
1
2
3
6
V
CC
V
OUT
V
CTRL
5
GND
V
SENSE
I
CTRL
2.5V
OP1
OP2
Pin Descriptions
Functional Block Diagram
Page 4
AP4320
Document number: DS36786 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
Symbol
Parameter
Rating
Unit
VCC
Power Supply Voltage
-0.3 to 38
V
V
OUT
Input Voltage (V
OUT
Pin)
-0.3 to VCC
V
V
ICTRL
Input Voltage (I
CTRL
Pin)
-0.3 to 18
V
V
SENSE
Input Voltage (V
SENSE
Pin)
-0.3 to 18
V
V
VCTRL
Input Voltage (V
CTRL
Pin)
-0.3 to 18
V
TJ
Junction Temperature
+150
C
T
STG
Storage Temperature
-55 to +150
C
T
LEAD
Lead Temperature (Soldering, 5sec)
+260
C
θ
JA
Thermal Resistance (Junction to Ambient)
250
C/W
Symbol
Parameter
Min
Max
Unit
VCC
Power Supply Voltage
3.5
36
V
Absolute Maximum Ratings (Note 4)
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
Page 5
AP4320
Document number: DS36786 Rev. 2 - 2
5 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
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Symbol
Parameters
Conditions
Min
Typ
Max
Unit
TOTAL CURRENT CONSUMPTION
I
CC
Total Supply Current Not Including the
Output Sinking Current
V
ICTRL=VSENSE
=0V, V
OUT
=Open
–
190 – μA
VOLTAGE CONTROL LOOP
Gmv
Transconduction Gain (V
CTRL
). Sink
Current Only
– 1 3.5 – mA/mV
V
REF
Voltage Control Loop Reference
TA=+25oC
2.488
2.50
2.512
V
–
2.48 – 2.52
I
IBV
Input Bias Current (V
CTRL
)
– – 25 – nA
CURRENT CONTROL LOOP
Gmi
Transconduction Gain (I
CTRL
). Sink
Current Only
–
1.5 7 –
mA/mV
V
SENSE
Current Control Loop Reference
AP4320A
TA = +25°C
29
30
31
mV
–
28
30
32
AP4320B
TA = +25°C
48.5
50
51.5 – 46
50
54
I
IBI
Current Out of Pin I
CTRL
at V
SENSE
AP4320A
V
ICTRL
=-30mV
–
16
–
μA
AP4320B
V
ICTRL
=-50mV
–
16
–
OUTPUT STAGE
V
OL
Low Output Voltage at 2mA
Sinking Current
–
–
30
100
mV
I
OS
Output Short Circuit Current.
Sink Current Only
V
OUT
=4V
–
30 – mA
Electrical Characteristics (@V
=20V, -25C <TA<+125C, unless otherwise specified.)
CC
Page 6
AP4320
Document number: DS36786 Rev. 2 - 2
6 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
-40 -20 0 20 40 60 80 100 120 140
2.480
2.485
2.490
2.495
2.500
2.505
2.510
2.515
2.520
V
REF
(V)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
150
160
170
180
190
200
210
220
230
240
I
CC
(A)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
29.0
29.2
29.4
29.6
29.8
30.0
30.2
30.4
30.6
30.8
31.0
V
SENSE
(mV)
Ambient Temperature (oC)
AP4320A
-40 -20 0 20 40 60 80 100 120 140
48.0
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
V
SENSE
(mV)
Ambient Temperature (oC)
AP4320B
-40 -20 0 20 40 60 80 100 120 140
0
5
10
15
20
25
30
35
40
45
50
I
IBV
(nA)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
8
10
12
14
16
18
20
22
I
IBI
(A)
Ambient Temperature (oC)
Performance Characteristics
V
vs. Ambient Temperature ICC vs. Ambient Temperature
REF
V
vs. Ambient Temperature V
SENSE
I
vs. Ambient Temperature I
IBV
vs. Ambient Temperature
SENSE
vs. Ambient Temperature
IBI
Page 7
AP4320
Document number: DS36786 Rev. 2 - 2
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© Diodes Incorporated
AP4320
A Product Line of
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-40 -20 0 20 40 60 80 100 120 140
20
25
30
35
40
45
50
I
OS_OP1
(mA)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
20
25
30
35
40
45
50
I
OS_OP2
(mA)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Gmv (mA/mV)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
2
3
4
5
6
7
8
9
10
Gmi (mA/mV)
Ambient Temperature (oC)
-40 -20 0 20 40 60 80 100 120 140
18
20
22
24
26
28
30
32
34
36
V
OL
(mV)
Ambient Temperature (oC)
Performance Characteristics (Cont.)
I
OS_OP1
Gmv vs. Ambient Temperature Gmi vs. Ambient Temperature
VOL vs. Ambient Temperature
vs. Ambient Temperature I
vs. Ambient Temperature
OS_OP2
Page 8
AP4320
Document number: DS36786 Rev. 2 - 2
8 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
AP4320 X XX XX - XX
PackingVersion
TR : Tape & Reel
A: 30mV V
SENSE
G1 : Green
Product Name
RoHS/GreenPackage
K6 : SOT26
B: 50mV V
SENSE
Package
Version
Part Number
Marking ID
Packing
SOT26
30mV V
SENSE
AP4320AK6TR-G1
GJZ
3000/Tape and Reel
50mV V
SENSE
AP4320BK6TR-G1
GKW
: Logo
XXX: Marking ID (See details from ordering information)
Ordering Information
Diodes IC’s Pb-free products with "G1" suffix in the part number, are RoHS compliant and green.
Marking Information
Page 9
AP4320
Document number: DS36786 Rev. 2 - 2
9 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
Diodes Incorporated
2.820(0.111)
3.100(0.122)
2.650(0.104)
3.000(0.118)
1.500(0.059)
1.700(0.067)
0.950(0.037)TYP
1.800(0.071)
2.000(0.079)
0.300(0.012)
0.500(0.020)
0.700(0.028)REF
0.100(0.004)
0.200(0.008)
0°
8°
0.200(0.008)
0.300(0.012)
0.600(0.024)
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
1.450(0.057)
MAX
1 2 3
4
5
6
Pin 1 Mark
Package Outline Dimensions (All dimensions in mm(inch).)
(1) Package Type: SOT26
Page 10
AP4320
Document number: DS36786 Rev. 2 - 2
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© Diodes Incorporated
AP4320
A Product Line of
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E E
G
Z
Y
X
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E
(mm)/(inch)
Value
3.600/0.142
1.600/0.063
0.700/0.028
1.000/0.039
0.950/0.037
Suggested Pad Layout
(1) Package Type: SOT26
Page 11
AP4320
Document number: DS36786 Rev. 2 - 2
11 of 11
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December 2013
© Diodes Incorporated
AP4320
A Product Line of
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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.
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 © 2013, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
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