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IC manufacturers Diodes Incorporated

Diodes Incorporated AP3125A | Demoboard EV1 Board User Guide

GREEN MODE PWM CONTROLLER

Overview

TopologyFlyback Converter
Input voltage90-265 V
Switching frequency60-70 kHz
IC revision2-2

Description

The AP3125X is a current mode PWM controller which is optimized for high performance, low standby power and cost effective offline fly-back converters. It is available in SOT26 package.The PWM switching frequency at normal operation is internally fixed (about 65kHz/100kHz). In middle load, IC will enter green mode to improve system efficiency with the help of frequency fold-back. 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/auto functions can be implemented using a minimal number of external components by CTRL pin.

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
  • Useful Pin Fault Protection:SENSE Pin FloatingCTRL Pin Short to GroundFB/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)

Typical applications

  • Set-top Box (STB) Power Supply
  • Switching AC-DC Adapter/Charger
  • ATX/BTX Auxiliary Power
  • Open Frame Switching Power Supply

Products

Order Code Data­sheet Downloads Product seriesCEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
Technical ReferenceTol. CSizeRISOCeramic TypeW
(mm)
H
(mm)
Fl
(mm)
IR
(A)
L
(mH)
RDC max.
(mΩ)
VR
(V (DC))
VT
(V (AC))
Samples
885012207081SPEC
7 files WCAP-CSGP MLCCs 50 V(DC)150 pF 2.5 2 X7R0805151K050DFCT10000 ±10% 080510 GΩ X7R Class II 1.25 0.8 0.5 50
885012207088SPEC
7 files WCAP-CSGP MLCCs 50 V(DC)2.2 nF 2.5 2 X7R0805222K050DFCT10000 ±10% 080510 GΩ X7R Class II 1.25 0.8 0.5 50
885012207098SPEC
7 files WCAP-CSGP MLCCs 50 V(DC)100 nF 2.5 2 X7R0805104K050DFCT10000 ±10% 08055 GΩ X7R Class II 1.25 0.8 0.5 50
860160672009SPEC
7 files WCAP-ATLL Aluminum Electrolytic Capacitors10 µF 4000 -55 °C up to +105 °C 120 5 10 2 5 11 ATEC110100M050DSPA3D000 ±20% 50
860021380017SPEC
7 files WCAP-ATG5 Aluminum Electrolytic Capacitors68 µF 2000 -25 °C up to +105 °C 410 816 15 7.5 16 25 ATJK250680M400DSPAEB000 ±20% 400
860160374017SPEC
7 files WCAP-ATLL Aluminum Electrolytic Capacitors220 µF 7000 -55 °C up to +105 °C 540 35.2 16 3.5 8 11.5 ATEE115221M016DSPA7G000 ±20% 16
860010374014SPEC
7 files WCAP-ATG8 Aluminum Electrolytic Capacitors680 µF 2000 -40 °C up to +85 °C 640 108.8 16 3.5 8 16 ATBE160681M016DSPA7B000 ±20% 16
7448010911SPEC
9 files WE-CMBNC Common Mode Power Line Choke Nanocrystalline 14 XS 7.5 16 0.9 11 430 250 1500
Samples
Order Code Data­sheet Downloads Product seriesCEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
Technical ReferenceTol. CSizeRISOCeramic TypeW
(mm)
H
(mm)
Fl
(mm)
IR
(A)
L
(mH)
RDC max.
(mΩ)
VR
(V (DC))
VT
(V (AC))
Samples