AP4305

A Product Line of
Diodes Incorporated
AP4305
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
Description
Pin Assignments
The AP4305 is a highly integrated solution for a constant
voltage/constant current mode SMPS application.
(Top View)
Pin 1 Mark
The AP4305 contains one 1.21V voltage reference with0.5%
accuracy, one current sensing circuit and two operational amplifiers.
Combining the voltage reference with one operational amplifier makes
AP4305 an ideal voltage controller for use in adapters and battery
chargers. The other low voltage reference combined with the other
operational amplifier makes it an ideal current limiter for output low
side current sensing.
VCTRL
1
6
VCC
GND
2
5
VSENSE
The AP4305 is available in SOT26 package.
VOUT
3
4
ICTRL
Features








SOT26
Constant Voltage and Constant Current Control
Precision Internal Voltage Reference
Few External Components
Easy Compensation
Low Supply Current: 0.5mA
Operating Temperature Range: -40 to +105oC
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
Applications


Adapters
Battery Chargers
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
VOUT+
To primary
AP4305
R4
VCC
1.210V
VOUT
+
R2
IL
R3 C1
+
VCTRL
Load
C3
GND
ICTRL
R5
VSENSE
R1
R6
500
VOUT-
Rss
VOUT  VREF 
R1  R 2 (V)
R1
CurrentLimit 
VSENSE (A)
RSS
Typical Application 1
AP4305
Document number: DS37513 Rev.2 - 2
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A Product Line of
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AP4305
Typical Applications Circuit (Cont.)
VOUT+
To primary
AP4305
1.210V
VCC
R4
VOUT
+
R3
R2
IL
C1
Loa
d
+
VCTRL
C3
GND
ICTRL
R5
VSENSE
R1
R6
500
VOUTRss
VOUT  [VREF  ( I L  RSS )] 
R1  R2
 ( I L  RSS ) (V)
R1
CurrentLimit 
VSENSE (A)
RSS
Typical Application 2
VOUT+
To primary
AP4305
1.210V
R4
VCC
VOUT
+
R3
R2
IL
C1
+
VCTRL
Loa
d
C3
GND
ICTRL
R5
VSENSE
R1
R6
500
VOUTRss
VOUT  VREF 
R1  R 2
 ( I L  RSS ) (V)
R1
CurrentLimit 
VSENSE  VREF
(A)
VSENSE  VREF  RSS
Typical Application 3
AP4305
Document number: DS37513 Rev.2 - 2
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A Product Line of
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AP4305
Pin Descriptions
Pin Number
Pin Name
Function
1
VCTRL
Input pin of the voltage control loop
2
GND
Ground
3
VOUT
Output pin. Sinking current only
4
ICTRL
Input pin of the current control loop
5
VSENSE
Input pin of the current control loop
6
VCC
Power supply
Functional Block Diagram
VCC
6
1.210V
3
1
VOUT
VCTRL
200mV
2
4
5
ICTRL
AP4305
Document number: DS37513 Rev.2 - 2
GND
VSENSE
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A Product Line of
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AP4305
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
Rating
Unit
20
V
-0.3 to VCC
V
VCC
Power Supply Voltage
VIN
Input Voltage
TJ
Junction Temperature
+150
o
TSTG
Storage Temperature
-65 to +150
o
TLEAD
Lead Temperature (Soldering, 5sec)
+260
o
JC
Package Thermal Resistance (Junction to Case)
92
C
C
C
o
C/W
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
Parameter
Min
Max
Unit
VCC
Power Supply Voltage
2.5
18
V
TA
Operating Temperature Range
-40
+105
AP4305
Document number: DS37513 Rev.2 - 2
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C
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A Product Line of
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AP4305
Electrical Characteristics
Symbol
(VCC=5V, TA=+25oC, unless otherwise specified.)
Parameter
Conditions
Min
Typ
Max
TA=+25oC
–
0.5
1
-40oCTA105oC
–
0.6
–
TA=+25oC
1
3.5
–
-40oCTA105oC
–
2.5
–
TA=+25oC
1.204
1.21
1.216
-40oCTA +105oC
1.186
–
1.234
TA=+25oC
–
50
–
-40oCTA +105oC
–
100
–
TA=+25oC
1.5
7
–
IOUT=2.5mA, TA=+25oC
198
200
202
IOUT=2.5mA, -40oCTA +105oC
192
–
208
–
25
–
-40oCTA +105oC
–
50
–
TA=+25oC
–
200
–
–
27
50
–
35
–
Unit
TOTAL CURRENT CONSUMPTION
ICC
Total Supply Current
Not Including the Output Sinking Current
mA
VOLTAGE CONTROL LOOP
Gmv
VREF
IIBV
Transconduction Gain (VCTRL).
Sink Current Only
mA/mV
Voltage Control Loop Reference
V
Input Bias Current (VCTRL)
nA
CURRENT CONTROL LOOP
Gmi
VSENSE
IIBI
Transconduction Gain (ICTRL).
Sink Current Only
mV
Current Control Loop Reference
Current Out of Pin ICTRL at 200mV
mA/mV
TA=+25oC
-40oC＜TA ＜
o
A
C
OUTPUT STAGE
VOL
TA=25oC
200
IOS
Low Output Voltage at 10mA Sinking Current
Output Short Circuit Current.
Output to VCC, Sink Current Only
AP4305
Document number: DS37513 Rev.2 - 2
TA=+25oC
-40oC＜TA ＜
-40oCTA +105oC
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C
mV
mA
September 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP4305
Performance Characteristics
VREF vs. Ambient Temperature
VSENSE vs. Ambient Temperature
203
1.220
1.215
VCC=12V
VCC=5V
VCC=2.5V
202
VSENSE (mV)
VREF (V)
1.210
1.205
201
200
1.200
199
1.195
1.190
-40
-20
0
20
40
60
80
100
198
-40
120
-20
0
o
80
100
Ambient Temperature ( C)
IIBV vs. Ambient Temperature
IIBI vs. Ambient Temperature
120
45
VCC=12V
VCC=5V
VCC=2.5V
VCC=12V
VCC=5V
VCC=2.5V
40
35
IIBI (A)
60
IIBV (nA)
60
Ambient Temperature ( C)
80
40
30
20
25
0
20
-20
0
20
40
60
80
100
15
-40
120
-20
0
20
40
60
80
100
120
o
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Output Short Circuit Current vs. Ambient Temperature
Supply Current vs. Ambient Temperature
60
1.6
1.4
50
VCC=12V
VCC=5V
VCC=2.5V
1.2
Supply Current (mA)
Output Short Circuit Current (mA)
40
o
100
-20
-40
20
40
30
20
VCC=12V
VCC=5V
VCC=2.5V
10
1.0
0.8
0.6
0.4
0.2
0
-40
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
AP4305
Document number: DS37513 Rev.2 - 2
0.0
-40
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
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A Product Line of
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AP4305
Ordering Information
AP4305 X XX - XX
Product Name
Package
Temperature Range
SOT26
-40 to +105C
Package
Packing
K: SOT26
TR: Tape & Reel
Part Number
AP4305KTR-G1
RoHS/Green
Marking ID
G2B
G1: Green
Packing
3000/Tape & Reel
Marking Information
(Top View)
: Logo
XXX: Marking ID (See Ordering Information)
AP4305
Document number: DS37513 Rev.2 - 2
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Diodes Incorporated
AP4305
Package Outline Dimensions (All dimensions in mm(inch).)
(1 )
Package Type: SOT26
0°
2.820(0.111)
8°
3.100(0.122)
0.300(0.012)
0.500(0.020)
5
4
2
3
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
2.650(0.104)
3.000(0.118)
6
0.200(0.008)
Pin 1 Mark
1
0.700(0.028)REF
0.950(0.037)TYP
0.000(0.000)
0.150(0.006)
1.800(0.071)
2.000(0.079)
0.100(0.004)
0.200(0.008)
0.900(0.035) 1.450(0.057)
MAX
1.300(0.051)
AP4305
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A Product Line of
Diodes Incorporated
AP4305
Suggested Pad Layout
(1)
Package Type: SOT26
E
E
Y
G
Z
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
AP4305
Document number: DS37513 Rev.2 - 2
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A Product Line of
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AP4305
IMPORTANT NOTICE
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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
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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
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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 © 2014, Diodes Incorporated
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AP4305
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