AP3988
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 12
Technical content
Features
Primary Side Control f or Eliminating Opto -coupler and Secondary CV/CC Control Circuitry Built-in NPN Transistor with 700VCBO Low Start-up Current: 0.2A (Typ.) Internal Output Cable Voltage Drop Compensation Hiccup Function to Improve Short Circuit Protection Better Over Voltage Protection Better Over Temperature Protection Low Total Cost Solution Output Power Range (Note 1): for 5.5W Adapter Totally Lead-free & Fully RoHS Compliant (Note 2 & 3) Halogen and Antimony Free. “Green” Device (Note 4) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Pin Assignments (Top View) SO-7
Applications
Adapters Set top boxes Appliances Notes: 1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient. 2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 3. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen - and Antimony-free, "Green" and Lead-free. 4. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. NOT RECOMMENDED FOR NEW DESIGN CONTACT US
Document number: DS36722 Rev. 5 - 3 2 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Typical Applications Circuit +J1 AC 90-264V D1 to D4 Rf1 +C1 FB CVCC CS CPC C11 Np Nfb C5 R6 Vo+ Vo- GND D12 + C12 R11 R12R10 R9R7 For AP3988 (5V/1A) Item Function QTY Item Function QTY C1,C2 4.7µF/400V, electrolytic 2 Rf1 10Ω/1W, fuse resistor 1 C3 4.7µF/50V, electrolytic 1 R3 3.3M/0.25W 1 C5 1nF/250V, ceramic 1 R5 3.9, 0805 1 C8 0.01µF, 0805 1 R6 150k, 1206 1 C11 1nF, 0805 1 R7 2.7, 1206 1 C12 680µ F/10V 1 R8 75k, 0805 1 D1 to D6 1N4007, rectifier diode 6 R9 43k, 0805 1 D12 APD340,Schottky diode 1 R10 200, 0805 1 L1 1mH, inductor 1 R11 27, 0805 1 L2 Bead, 0805 1 R12 1.5k, 0805 1 U1 AP3988, SO-7 1 T1 EE13 core, PC40, transformer 1
Document number: DS36722 Rev. 5 - 3 3 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Pin Descriptions Pin Number Pin Name Function
1 CPC This pin connects a capacitor to GND for output cable compensation
2 FB The voltage feedback from auxiliary winding
3 VCC This pin receives rectified voltage from the auxiliary winding of the transformer
4 CS Current sense for primary side of transformer
5, 6 C This pin is connected with an internal power BJT’s collector
7 GND This pin is the signal reference ground
CV_ctrl PFM Driver R Q S R Q S FB CS CPC VCC CS GND Constant Voltage Control Cable Compensation Constant Current Control 0.05V VFB_ref VCSN(N=1,2,3) COMP Peak Current Control LEB Frequency Dither VCSN Select Dynamic Response Pro Dyn Shutdown Pre_Shutdown Line Comp. tONS tONS, NL and LL Detector OSC UV UV Vload Vally ON Vload CC_ctrl Max Tonp Rcs Short Output Short tONS LL NL CPC tOSC Detect Pulse (LL+NL)Bar NL Vload UV CV_M DetectON DetectON LL Vload VCSN(N=1,2,3) tosc NL LL C5, 6
Document number: DS36722 Rev. 5 - 3 4 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Absolute Maximum Ratings (Note 5) Symbol Parameter Rating Unit VCC Supply Voltage -0.3 to 30 V VCS, VCPC Voltage on CS, CPC Pin -0.3 to 7 V VFB FB Input Voltage -0.3 to 8 V VCBO Collector-emitter Voltage 700 V ICDC Collector DC Current 1.5 A TJ Operating Junction Temperature +150 °C TSTG Storage Temperature -65 to +150 °C TLEAD Lead Temperature (Soldering, 10 sec) +300 °C – ESD (Machine Model) 200 V – ESD (Human Body Model) 2000 V PD Total Power Dissipation 0.7 W Note: 5. Stresses greater than those listed under Absolute Maximum Ratings can 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 can affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Supply Voltage – 25 V TOP Operating Temperature Range -40 +85 °C fS(MAX) Maximum Operating Frequency – 60 kHz Thermal Impedance (Note 6) Symbol Parameter Value Unit θJA Junction to Ambient 140 °C/W θJC Junction to Case 70 Note 6: When mounted a standard single-sided FR4 board with 300mm2 Cu (at least 35µm thick) connected to CS pin and all collectors.
Document number: DS36722 Rev. 5 - 3 5 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Electrical Characteristics (@VCC=15V, TJ=+25° C, unless otherwise specified.) Symbol Parameters Conditions Min Typ Max Unit STARTUP AND UVLO SECTION VTH_ST Turn-on Voltage – 13 15 17 V VOPR(MIN) Turn-off Voltage – 5.2 5.8 6.4 V STANDBY CURRENT SECTION IST Turn-on Current VCC=VTH_ST-1V before startup 0 0.2 0.6 μA ICC_OPR Operating Current Static current @ no load 550 650 750 OPERATING FREQUENCY SECTION (5% LOAD TO FULL LOAD) fS(MAX) Operating Frequency in Full Load Condition – – – 60 kHz Δf/f Frequency Dithering 5% to 100% of full load range 4.5 5 5.5 % OPERATING FREQUENCY SECTION (NO LOAD TO 5% OF IOUT(MAX)) fS(MIN) Output Voltage Detection Frequency – 1.8 2 2.2 kHz CURRENT SENSE SECTION VCS_H Peak Current Sense Voltage in Heavy Load 40% to 100% of full load 874 910 946 mV VCS_M Peak Current Sense Voltage in Middle Load 17% to 40% of full load 581 605 630 mV VCS_L Peak Current Sense Voltage in Light Load 5% to 17% of full load 390 405 425 mV ΔVCS/VCS VCS Modulation for Frequency Dithering – – 2.5 – % tMOD VCS Modulation Period – 225 250 275 μs RLINE Built-in Line Compensation Resistor – 260 330 400 Ω tLEB Leading Edge Blanking @ VCS_H and VCS_M 600 750 900 ns CONSTANT VOLTAGE SECTION VFB Equivalent Feedback Voltage @ 90% Load Closed loop test of VOUT 4.13 4.20 4.27 V IFB FB Pin Input Current VFB=4V 3.36 4.20 5.04 μA VCABLE Cable Compensation Drop – – 0.35 – V CONSTANT CURRENT SECTION tONS/tSW Secondary Winding Conduction Duty VFB=3V – 4/7 – – POWER TRANSISTOR SECTION VCE(SAT) Collector-emitter Saturation Voltage IC=0.5A – – 0.3 V hFE DC Current Gain – 14 17 – – ICEO Leakage Current – – – 60 μA PROTECTION FUNCTION SECTION VFB(OVP) Over Voltage Protection – – 7.5 – V VFB(SCP) Short Circuit Protection VFB @ Hiccup 2.6 3.3 3.7 V TOTP Shutdown Temperature – +125 +160 – °C THYS Temperature Hysteresis – – +40 – °C
© 2022 Copyright Diodes Incorporated. All Rights Reserved. Figure 1. Simplified Flyback Converter Controlled by AP3988
© 2022 Copyright Diodes Incorporated. All Rights Reserved. The AP3988 is designed to work in constant current (CC) mode. Figure 4 shows the secondary current waveforms. Figure 4. Secondary Current Waveform gate driver cannot be switched off. typical 10nF external capacitor connected to the CPC pin is used to smooth voltage signal for cable compensation. die temperature drops about +40°C, the IC will recover automatically to normal operation.
Document number: DS36722 Rev. 5 - 3 9 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988
Ordering Information
TR : Tape & ReelM : SO-7 G1 : Green Product Name RoHS/Green Part Number Temperature Range Package Marking ID Packing Qty. Carrier AP3988MTR-G1 -40°C to +85°C SO-7 3988M-G1 4000 Tape & Reel Marking Information (Top View) First and Second Lines: Logo and Marking ID Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch No.
Document number: DS36722 Rev. 5 - 3 10 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Package Outline Dimensions (All dimensions in mm(inch).) Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SO-7 3.800(0.150) 4.000(0.157) 1.270(0.050) TYP 4.700(0.185) 5.100(0.201) 0.330(0.013) 0.510(0.020) 0.190(0.007) 0.250(0.010) 0.100(0.004) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.450(0.017) 0.800(0.031)8° 5.800(0.228) 6.200(0.244) 2.54(0.100) TYP 1.250(0.049) 1.500(0.059) Note: Eject hole, oriented hole and mold mark is optional.
Document number: DS36722 Rev. 5 - 3 11 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SO-7 ZG E X Y Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) (mm)/(inch)
Document number: DS36722 Rev. 5 - 3 12 of 12 www.diodes.com March 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. AP3988 IMPORTANT NOTICE 1. DIODES INCORPORATED (Diodes) AND ITS SUBSIDIARIES MAKE NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO ANY INFORMATION CONTAINED IN THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON -INFRINGEMENT OF TH IRD PARTY INTELLECTUAL PROPERTY RIGHTS (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes ’ products described herein and application examples. Diodes does not assume any liability arising out of the application or use of this document or an y product described herein. This document is intended for skilled and technically trained engineering customers and users who d esign with Diodes’ products. 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