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PDF AP3125B Data sheet ( Hoja de datos )
| Número de pieza | AP3125B | |
| Descripción | GREEN MODE PWM CONTROLLER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Description
A Product Line of
Diodes Incorporated
AP3125B
GREEN MODE PWM CONTROLLER
Pin Assignments
The AP3125B 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.
Built-in Brownout (BNO) and Line Over Voltage Protection (LOVP)
are also integrated in AP3125B.
(Top View)
Pin 1 Mark
GND 1
FB 2
BNO 3
6 GATE
5 VCC
4 SENSE
SOT26
Features
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
Brownout Protection (BNO)
Line Over Voltage Protection (LOVP)
Useful Pin Fault Protection:
SENSE Pin Floating
SENSE Pin Short to Ground
FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Load Protection (OLP)
Mini Size with Packages
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)
Applications
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.
AP3125B
Document number: DS36659 Rev. 3 - 2
1 of 12
www.diodes.com
July 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
AP3125B
Electrical Characteristics (@TA = +25°C, VCC = 16V, unless otherwise specified.)
Symbol
Supply Voltage (VCC Pin)
ISTARTUP
Parameter
Startup Current
ICC Operating Supply Current
– UVLO (on)
– VCC Maintain
– UVLO (off)
– VCC OVP
– VCC Clamp
PWM Section/Oscillator Section
– Maximum Duty Cycle
– Oscillation Frequency
– Green Mode Frequency
– Frequency Temperature
Stability
– Frequency Voltage Stability
– Frequency Dithering
Current Sense Section (SENSE Pin)
VCS Maximum SENSE Voltage
– FOCP Voltage
– SENSE Shorted Protection
Threshold
– LEB Time of SENSE
– Delay to Output (Note 5)
– Soft-start Time
Feedback Input Section (FB Pin)
–
The Ratio of Input Voltage to
Current Sense Voltage
– Input Impedance
– Source Current
– Green Mode Threshold
– Input Voltage for Zero Duty
Output Section (GATE Pin)
–
–
–
–
–
Output Low Level
Output High Level
Output Clamping Voltage
Rising Time (Note 5)
Falling Time (Note 5)
Conditions
–
VFB=0V, CL=1nF
VFB=3V, CL=0nF
–
–
–
–
ICC=5mA
–
–
–
-20°C to +125°C
(Note 5)
VCC=12V to 30V
–
VFB=4.5V
–
–
–
–
–
–
–
VFB=0V
–
–
IO=20mA, VCC=12V
IO=20mA, VCC=12V
–
CL=1nF, VCC=13V
CL=1nF, VCC=13V
Min Typ Max Unit
– 1 10
0.5 0.7
1
0.6 1.2 2.0
14.5 15.8 16.5
8.6 9.1 9.6
7.1 7.6 8.1
27 28.5 30
31 34
–
μA
mA
V
V
V
V
V
70 75 80 %
60 65 70 kHz
20 – 30 kHz
– – 5 %
– – 3 %
±4 ±6 ±8 %
0.9 0.95
1
1.5 1.7 1.9
– 0.1 –
150 250 350
– 100 –
358
V
V
V
ns
ns
ms
2.5 3 3.5 V/V
12 15 18 kΩ
-0.2
-0.27
-0.34
mA
– 2.1 –
V
1.3 1.55 1.8
V
––1V
8––V
11 13 15
V
–
150 250
ns
– 50 100 ns
AP3125B
Document number: DS36659 Rev. 3 - 2
5 of 12
www.diodes.com
July 2014
© Diodes Incorporated
5 Page 
Suggested Pad Layout
(1) Package Type: SOT26
A Product Line of
Diodes Incorporated
AP3125B
Dimensions
Value
Z
(mm)/(inch)
3.600/0.142
G
(mm)/(inch)
1.600/0.063
X
(mm)/(inch)
0.700/0.028
Y
(mm)/(inch)
1.000/0.039
E
(mm)/(inch)
0.950/0.037
AP3125B
Document number: DS36659 Rev. 3 - 2
11 of 12
www.diodes.com
July 2014
© Diodes Incorporated
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AP3125B.PDF ] | |
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