Diodes Incorporated AP3125A | Demoboard EV1 Board User Guide | Würth Elektronik Reference Design Search

Overview

Topology	Flyback Converter
Input voltage	90-265 V
Switching frequency	60-70 kHz
IC revision	2-2

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
Open Frame Switching Power Supply
ATX/BTX Auxiliary Power

More information

Products

Order Code	Datasheet	Downloads	Status	Product series	C	Tol. C	Size	Operating Temperature	DF (%)	R_ISO	Ceramic Type	Fl (mm)	Packaging	Endurance (h)	Operating Temperature	I_RIPPLE (mA)	I_Leak (µA)	Pitch (mm)	Ø D (mm)	I_R (A)	L (mH)	R_{DC max.} (mΩ)	V_R (V (DC))	V_T (V (AC))	Material	L (mm)	W (mm)	H (mm)	Mount
885012207081	SPEC	8 files EDA models: Components ZIP ALT Altium_WCAP-CSGP (rev24c).IntLib \| 904 KB ZUK Cadstar_WCAP-CSGP (rev21c).zip \| 46.5 KB CDS Cadence_WCAP-CSGP (rev24b).zip \| 685.2 KB EAG Eagle_WCAP-CSGP (rev24d).lbr \| 1.1 MB CAD files ZIP 3D 3D_WCAP-CSGP_0805_2.0x1.25x0.8x0 (rev1).pdf \| 31.7 KB IGS IGS_WCAP-CSGP_0805_ 2.0x1.25x0.8x0 (rev1).igs \| 77.4 KB STP Download_STP_8850122070xx (rev1).stp \| 29.4 KB Electric models ZIP PSP PSpice_WCAP-CSGP (rev24b).zip \| 331.9 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-CSGP MLCCs 50 V(DC)	150 pF	±10%	0805	-55 °C up to +125 °C	2.5	10 GΩ	X7R Class II	0.5	7" Tape & Reel	–	–	–	–	–	–	–	–	–	50	–	–	2	1.25	0.8	–
885012207088	SPEC	8 files EDA models: Components ZIP ALT Altium_WCAP-CSGP (rev24c).IntLib \| 904 KB ZUK Cadstar_WCAP-CSGP (rev21c).zip \| 46.5 KB CDS Cadence_WCAP-CSGP (rev24b).zip \| 685.2 KB EAG Eagle_WCAP-CSGP (rev24d).lbr \| 1.1 MB CAD files ZIP 3D 3D_WCAP-CSGP_0805_2.0x1.25x0.8x0 (rev1).pdf \| 31.7 KB IGS IGS_WCAP-CSGP_0805_ 2.0x1.25x0.8x0 (rev1).igs \| 77.4 KB STP Download_STP_8850122070xx (rev1).stp \| 29.4 KB Electric models ZIP PSP PSpice_WCAP-CSGP (rev24b).zip \| 331.9 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-CSGP MLCCs 50 V(DC)	2.2 nF	±10%	0805	-55 °C up to +125 °C	2.5	10 GΩ	X7R Class II	0.5	7" Tape & Reel	–	–	–	–	–	–	–	–	–	50	–	–	2	1.25	0.8	–
885012207098	SPEC	8 files EDA models: Components ZIP ALT Altium_WCAP-CSGP (rev24c).IntLib \| 904 KB ZUK Cadstar_WCAP-CSGP (rev21c).zip \| 46.5 KB CDS Cadence_WCAP-CSGP (rev24b).zip \| 685.2 KB EAG Eagle_WCAP-CSGP (rev24d).lbr \| 1.1 MB CAD files ZIP 3D 3D_WCAP-CSGP_0805_2.0x1.25x0.8x0 (rev1).pdf \| 31.7 KB IGS IGS_WCAP-CSGP_0805_ 2.0x1.25x0.8x0 (rev1).igs \| 77.4 KB STP Download_STP_8850122070xx (rev1).stp \| 29.4 KB Electric models ZIP PSP PSpice_WCAP-CSGP (rev24b).zip \| 331.9 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-CSGP MLCCs 50 V(DC)	100 nF	±10%	0805	-55 °C up to +125 °C	2.5	5 GΩ	X7R Class II	0.5	7" Tape & Reel	–	–	–	–	–	–	–	–	–	50	–	–	2	1.25	0.8	–
860160672009	SPEC	7 files EDA models: Components ZIP ALT Altium_WCAP-ATLL (rev22c).IntLib \| 9 MB ZUK CadStar_WCAP-ATLL (rev19a).zip \| 19.4 KB CDS Cadence_WCAP-ATLL (rev22a).zip \| 24.3 MB EAG Eagle_WCAP-ATLL (rev20a).lbr \| 246.9 KB CAD files ZIP IGS IGS_WCAP-ATLL_5x11x2x0 (rev1).igs \| 4.7 MB STP Download_STP_860160x720xx (rev1).stp \| 1.8 MB Electric models ZIP PSP PSpice_WCAP-ATLL (rev22a).zip \| 33.9 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-ATLL Aluminum Electrolytic Capacitors	10 µF	±20%	–	–	10	–	–	–	Ammopack	4000	-55 °C up to +105 °C	120	5	2	5	–	–	–	50	–	–	11	–	–	–
860021380017	SPEC	7 files EDA models: Components ZIP ALT Altium_WCAP-ATG5 (rev22d).IntLib \| 9.8 MB ZUK Cadstar_WCAP-ATG5 (rev21a).zip \| 19.7 KB CDS Cadence_WCAP-ATG5 (rev22b).zip \| 31.2 MB EAG Eagle_WCAP-ATG5 (rev22a).lbr \| 217.3 KB CAD files ZIP IGS IGS_WCAP-ATG5_16x25x7.5x0 (rev1).igs \| 5.1 MB STP Download_STP_860020x800xx (rev1).stp \| 2.1 MB Electric models ZIP PSP PSpice_WCAP-ATG5 (rev22b).zip \| 34.4 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-ATG5 Aluminum Electrolytic Capacitors	68 µF	±20%	–	–	15	–	–	–	Ammopack	2000	-25 °C up to +105 °C	410	816	7.5	16	–	–	–	400	–	–	25	–	–	–
860160374017	SPEC	7 files EDA models: Components ZIP ALT Altium_WCAP-ATLL (rev22c).IntLib \| 9 MB ZUK CadStar_WCAP-ATLL (rev19a).zip \| 19.4 KB CDS Cadence_WCAP-ATLL (rev22a).zip \| 24.3 MB EAG Eagle_WCAP-ATLL (rev20a).lbr \| 246.9 KB CAD files ZIP IGS IGS_WCAP-ATLL_8x11.5x3.5x0 (rev1).igs \| 4.8 MB STP Download_STP_860160x740xx (rev1).stp \| 1.9 MB Electric models ZIP PSP PSpice_WCAP-ATLL (rev22a).zip \| 33.9 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-ATLL Aluminum Electrolytic Capacitors	220 µF	±20%	–	–	16	–	–	–	Ammopack	7000	-55 °C up to +105 °C	540	35.2	3.5	8	–	–	–	16	–	–	11.5	–	–	–
860010374014	SPEC	7 files EDA models: Components ZIP ALT Altium_WCAP-ATG8 (rev23a).IntLib \| 7.9 MB ZUK CadStar_WCAP-ATG8 (rev19a).zip \| 18.6 KB CDS Cadence_WCAP-ATG8 (rev22a).zip \| 25.9 MB EAG Eagle_WCAP-ATG8 (rev20a).lbr \| 226.3 KB CAD files ZIP IGS IGS_WCAP-ATG8_8x16x3.5x0 (rev1).igs \| 4.7 MB STP Download_STP_860010x7401x (rev1).stp \| 1.9 MB Electric models ZIP PSP PSpice_WCAP-ATG8 (rev22a).zip \| 31 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WCAP-ATG8 Aluminum Electrolytic Capacitors	680 µF	±20%	–	–	16	–	–	–	Ammopack	2000	-40 °C up to +85 °C	640	108.8	3.5	8	–	–	–	16	–	–	16	–	–	–
7448010911	SPEC	9 files EDA models: Components ZIP ALT WE-CMBNC (rev24a).IntLib \| 33.5 MB ZUK Cadstar_WE-CMBNC (rev20a).zip \| 23.3 KB CDS Cadence_WE-CMBNC (rev24a).zip \| 143 MB EAG Eagle_WE-CMBNC (rev24a).lbr \| 150.3 KB CAD files ZIP 3D 3D_WE-CMBNC_7448010911 (rev1).pdf \| 5 MB IGS 7448010911 (rev1).igs \| 11.7 MB STP 7448010911 (rev1).stp \| 3.9 MB Electric models ZIP S S-Parameter_7448010911 (rev20a).s4p \| 312 KB PSP PSpice_WE-CMBNC (rev22a).zip \| 21.2 KB	Active i\| Production is active. Expected lifetime: >10 years.	WE-CMBNC Common Mode Power Line Choke Nanocrystalline	–	–	XS	-55 °C up to +125 °C	–	–	–	–	–	–	–	–	–	–	–	0.9	11	430	300	2100	Nanocrystalline	14	7.5	16	THT