AP4341S

AP4341S
DYNAMIC PSR ACCELERATOR
Description
Pin Assignments
NEW PRODUCT
The AP4341S is an output voltage detector for Primary Side Control
System. It is a low power loss solution. It detects the output voltage
and provides a periodical signal when the output voltage is lower than
a certain threshold. The periodical signal can be coupled by the
transformer to the primary side and provided as an awakening signal
for the main primary side controller. By fast response to secondary
side voltage, the AP4341S can effectively improve the transient
performance of Primary Side Control System.
(Top View)
GND
3
The AP4341S will enable a discharge circuit when it detects the
output voltage is higher than a certain threshold.
The AP4341S can cooperate with some PSR ICs, such as AP3775,
GP350H and GP350BX.
1
2
VCC
OUT
SOT23
The AP4341S is available in SOT23 package.
Applications
Features






Fast Detector of Supply Voltages
33kHz Output Pulse
No External Components
Low Power Loss for Green Mode Applications
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:


Adapters/Chargers for Cell/Cordless Phones, ADSL Modems,
MP3 and Other Portable Apparatus
Standby and Auxiliary Power Supplies
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
FR1
TR1
D1
C8
R12
R3
D4 to D7
R6
C1
+
C2
R7
D2
+
OUT VCC
R4
GND
R11
L2
C5
D3
IC2
AP4341S
+
C3
+
C4
VO
R10
Q1
IC1
CS
CPC
R5
C6
VCC
R16
OUT
FB
EM
GND
IS
R17
R2
AP4341S
Document number: DS38219 Rev. 2 - 2
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AP4341S
Pin Number
Pin Name
Function
1
VCC
Power supply pin, connected with one end of the secondary winding and the output
capacitance
2
OUT
Secondary detecting pin, connected with the other end of the secondary winding
3
GND
Ground pin, connected with secondary side GND of the system
Functional Block Diagram
VCC
1
2
OUT
VREF
UVLO
+
-
OUT
COMP
VREF
UVLO
tONP
Detector
DRIVER
NEW PRODUCT
Pin Descriptions
DYNAMIC
Control
Logic
+
OSC
-
VDIS
COMP
VREF
VREF
VDISCHARGE
+
VCC
-
VCC
Discharge
OVP
OVP
VCC
Band-gap
VREF
+
3
GND
AP4341S
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AP4341S
Absolute Maximum Ratings (Note 4)
Parameter
Rating
Unit
Supply Voltage VCC
-0.3 to 7
V
Voltage at OUT
-40 to 9
V
Internally limited
A
Power Dissipation at TA= +25ºC
0.4
W
Operating Junction Temperature
+150
ºC
-65 to +150
ºC
Lead Temperature (Soldering, 10 sec)
+300
ºC
Thermal Resistance (Junction to Case)
140
ºC/W
NEW PRODUCT
Output Current at OUT
Storage Temperature
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
VCC
Supply Voltage
TA
Ambient Temperature
Electrical Characteristics
Symbol
Min
Max
Unit
2
6
V
-40
+85
ºC
(VCC =5V, TA=+25°C, unless otherwise specified.)
Parameter
Conditions
Min
Typ
Max
Unit
Supply Voltage ( VCC Pin )
VON
Power-on Voltage
–
2.1
2.5
2.9
V
IST
Startup Current
VCC=2.1V
15
30
65
μA
IOP
Operating Current
OUT pin floating,
VCC=VTRI+20mV
30
80
120
μA
VOFF
Power-off Voltage
–
1.9
2.3
2.7
V
VTRI
Internal Trigger Voltage
–
5.05
5.10
5.15
V
Duty Cycle
VCC=4.9V
1.5
5
6.5
%
tOSC
Oscillation Period
VCC=4.9V
25
30
35
μs
IOUT
Output Maximum Current
VCC=4.9V
26
31
36
mA
tDIS
Minimum Period
–
55
70
80
ms
VDIS
Discharge Voltage
–
5.10
5.15
5.20
V
IDIS
Discharge Current
–
0.5
1
1.5
mA
VOVP
Overshoot Voltage for Discharge
–
5.15
5.25
5.45
V
IOVP
Overshoot Current for Discharge
–
40
100
160
mA
Output Section/ Oscillator Section
–
Note:
5. The system output voltage is 5V.
AP4341S
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AP4341S
Operation Description
VOVP
VDIS
VDIS
VTRI
VTRI
NEW PRODUCT
VCC VON
VOFF
UVLO
Dynamic
IOVP
IDIS
IVCC
tDIS
2ms
Figure 1. Typical Waveforms of AP4341S
When VCC voltage is beyond power-on voltage (VON), the AP4341S starts up. The OUT pin asserts a periodical pulse and oscillation period is
tOSC. When VCC voltage is beyond trigger voltage (VTRI), the periodical pulse in OUT pin is discontinued. When VCC voltage is beyond discharge
voltage (VDIS), the discharge circuit will be enabled, a 1mA current will flow into VCC pin. When VCC voltage is higher than overshoot voltage
(VOVP), the AP4341S will enable a discharge circuit until the VCC voltage falls below the overshoot voltage. At the same time, the periodical pulse
in OUT pin will be disabled.
When the VCC voltage is below power-off voltage (VOFF), the AP4341S will be shut down.
AP4341S
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AP4341S
Ordering Information
AP4341S X XX - XX
Product Name
Package
NEW PRODUCT
N: SOT23
Packing
TR: Tape & Reel
RoHS/Green
G1: Green
Package
Temperature Range
Part Number
Marking ID
Packing
SOT23
-40 to +85C
AP4341SNTR-G1
GFB
3000/Tape & Reel
Marking Information
GFB
AP4341S
Document number: DS38219 Rev. 2 - 2
: Logo
GFB: Marking ID
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AP4341S
Package Outline Dimensions (All dimensions in mm(inch).)
(1)
Package Type: SOT23
3.0 °
7.0°
NEW PRODUCT
0.500(0.020)
0.700(0.028)
2.0°
1.050(0.041)REF
0.0°~10.0°
0.010(0.0004)
0.100(0.004) 0.200(0.008)MIN
Document number: DS38219 Rev. 2 - 2
7.0°
0.080(0.003)
0.180(0.007)
0.550(0.022)REF
1.200(0.047)
1.400(0.055)
2.300(0.091)
2.500(0.098)
AP4341S
R0.100(0.004)
0.900(0.035)
1.100(0.043)
2.800(0.110)
3.000(0.118)
0.890(0.035)
1.030(0.041)
0.100(0.004) GAUGE PLANE
4×R0.100(0.004)
0.300(0.012)
0.510(0.020)
1.900(0.075)REF
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AP4341S
Suggested Pad Layout
(1)
Package Type: SOT23
Grid placement courtyard
NEW PRODUCT
Y
Z
G
Y
X
E
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E
(mm)/(inch)
Value
2.900/0.114
1.100/0.043
0.800/0.031
0.900/0.035
0.950/0.037
AP4341S
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AP4341S
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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).
NEW PRODUCT
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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:
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labeling can be reasonably expected to result in significant injury to the user.
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failure of the life support device or to affect its safety or effectiveness.
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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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AP4341S
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