A Product Line of
Diodes Incorporated
AP3125A/V/L/R
GREEN MODE PWM CONTROLLER
Description
The AP3125A/V/L/R is a current mode PWM controller which is
optimized for high performance, low standby power and cost effective
offline flyback converters.
The PWM switching frequency at normal operation is internally fixed
(about 65kHz). In middle load, the IC will enter green mode to
improve system efficiency with the help of frequency foldback. A
minimum switching frequency (about 20kHz) is set to avoid the
audible noise. In no load or light load, the IC will enter the burst mode
to minimize standby power. Furthermore, the frequency dithering
function is built-in to reduce EMI emission.
Internal slope compensation allows more stable Peak-Current Mode
control over wide range of input voltage and load conditions. Internal
line compensation ensures constant output power limit over entire
universal line voltage range.
Comprehensive protection features are included, such as cycle-by-
cycle current limit (OCP), VCC Over Voltage Protection (VOVP),
internal OTP, Over Load Protection (OLP) and pins’ fault protection.
The versatile latch functions can be implemented using a minimal
number of external components.
Pin Assignments
(Top View)
Pin 1 Mark
NEW PRODUCT
GND
1
2
3
6
5
4
GATE
FB
VCC
CTRL
SENSE
SOT26
Features
Applications
Very Low Start-up Current
Current Mode Control
Non-audible-noise Green-mode Control
Internal Slope Compensation
Soft Start During Startup Process
Frequency Fold Back for High Average Efficiency
Secondary Winding Short Protection with FOCP
Soft Switching for Reducing EMI
VCC Maintain Mode
Useful Pin Fault Protection:
SENSE Pin Floating
CTRL Pin Short to Ground
FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Load Protection (OLP)
Optional Latch Mode for VOVP, OLP and CTRL Pin Protection
Mini Size Package of SOT26
Pin to Pin Compatible with AP3105NA/NV/NL/NR
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power
Set-top Box (STB) Power Supply
Open Frame Switching Power Supply
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.
AP3125A/V/L/R
Document number: DS36660 Rev. 2 - 2
1 of 13
www.diodes.com
July 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP3125A/V/L/R
Absolute Maximum Ratings
(Note 4)
Symbol
V
CC
I
O
V
FB
, V
SENSE
, V
CTRL
Power Supply Voltage
Gate Output Current
Input Voltage to FB, SENSE, CTRL
Thermal Resistance (Junction to Ambient)
Power Dissipation at T
A
< +25°
C
Operating Junction Temperature
Storage Temperature Range
ESD (Human Body Model)
ESD (Machine Model)
Parameter
Rating
30
350
-0.3 to 7
250
500
-40 to +150
+150
3000
300
Unit
V
mA
V
°
C/W
mW
°
C
°
C
V
V
NEW PRODUCT
θ
JA
P
D
T
J
T
STG
–
–
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
Supply Voltage
Parameter
Min
10
Max
25
Unit
V
AP3125A/V/L/R
Document number: DS36660 Rev. 2 - 2
4 of 13
www.diodes.com
July 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AP3125A/V/L/R
Electrical Characteristics
Symbol
Supply Voltage (VCC Pin)
I
STARTUP
I
CC
–
Startup Current
Operating Supply Current
V
FB
=3V, C
L
=0nF
U
VLO (on)
V
CC
Maintain
U
VLO (off)
V
CC
OVP
V
CC
Clamp
I
CC
=5mA
–
–
–
–
–
V
FB
=0V, C
L
=1nF
–
0.5
0.6
14.5
8.6
7.1
27
31
1
0.7
1.2
15.8
9.1
7.6
28.5
34
10
1
mA
2.0
16.5
9.6
8.1
30
–
V
V
V
V
V
μA
(@T
A
= +25° V
CC
= 16V, unless otherwise specified.)
C,
Parameter
Conditions
Min
Typ
Max
Unit
NEW PRODUCT
–
–
–
–
PWM Section/Oscillator Section
–
–
–
–
–
–
Maximum Duty Cycle
Oscillation Frequency
Green Mode Frequency
Frequency Temperature
Stability
Frequency Voltage Stability
Frequency Dithering
–
–
–
-20° to 125° (Note 5)
C
C
V
CC
=12V to 30V
–
70
60
20
–
–
±4
75
65
–
–
–
±6
80
70
30
5
3
±8
%
kHz
kHz
%
%
%
Current Sense Section (SENSE Pin)
V
CS
–
–
–
–
Maximum SENSE Voltage
FOCP Voltage
LEB Time of SENSE
Delay to Output (Note 5)
Soft-start Time
V
FB
=4.5V
–
–
–
–
0.9
1.5
150
–
3
0.95
1.7
250
100
5
1
1.9
350
–
8
V
V
ns
ns
ms
Feedback Input Section (FB Pin)
The Ratio of Input Voltage to
–
Current Sense Voltage
–
–
–
–
Output Section (GATE Pin)
–
–
–
–
–
Output Low Level
Output High Level
Output Clamping Voltage
Rising Time (Note 5)
Falling Time (Note 5)
Input Impedance
Source Current
Green Mode Threshold
Input Voltage for Zero Duty
V
FB
=0V
–
–
2.5
12
-0.2
3
15
-0.27
2.1
1.55
3.5
18
-0.34
–
1.8
V/V
kΩ
mA
V
V
–
–
–
1.3
I
O
=20mA, V
CC
=12V
I
O
=20mA, V
CC
=12V
–
C
L
=1nF, V
CC
=13V
C
L
=1nF, V
CC
=13V
–
8
11
–
–
–
–
13
150
50
1
–
15
250
100
V
V
V
ns
ns
AP3125A/V/L/R
Document number: DS36660 Rev. 2 - 2
5 of 13
www.diodes.com
July 2014
© Diodes Incorporated
京公网安备 11010802033920号
EEWORLD
