AP3302 DIODES | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 17
Technical content
Features
Very Low Start-Up Current Quasi-Resonant Operation with Valley Lock under All Line and Load Condition Non-Audible-Noise Quasi-Resonant Control Soft Start During Startup Process Frequency Fold Back for High Average Efficiency Constant Over Current Protection Secondary Winding Short Protection with FOCP Frequency Dithering for Reducing EMI VCC Maintain Mode Useful Pin Fault Protection: SENSE Pin Floating FB/Opto-Coupler Open/Short Comprehensive System Protection Feature: VCC Over Voltage Protection (VOVP) Over Load Protection (OLP) Brown Out Protection (BNO) Secondary Side OVP (SOVP) and UVP (SUVP) Mini Size Package of SOT26 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) 3 4 Pin 1 Mark GND GATE VCC SENSE FB DEM SOT26
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 Hal ogen- 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.
Document number:DS38882 Rev. 4 - 2 2 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Typical Applications Circuit AC R 1 R 9 R 7C7 C32 C 6 T 1 D 5 R R31 C29 CY1 GND GATE FB SENSEVCC AP3302 Q 1 NTC 1 R 2 R 6 R12 DEM D 4 D 3 Vout GND USB Connector R 24 R C21 R 26 DRAIN VCC GND CCM AREF VDET 5&Pad 7,8 R33 R32 R34 C30 R37 R3D 6 R23 D 1 D 2 C 5 APR34509 R13 C31 U 2 ICTRL VSENSE VCTRL VCC VOUT GND C25R28 R25 C23 AP433X C 22 C 26 C 27 C24 R29 R10 R38 R27 R 8 TVS2 TVS3 TVS4 DRISR Pin Descriptions Pin Number Pin Name Function 1 GND Signal ground. Current return for driver and control circuits 2 FB Feedback. Directly connected to the opto-coupler
3 DEM Valley detection for QR control, AC line voltage detection for Brown-in/Brown-out, Sample output
voltage for SOVP and SUVP, Set OCP line compensation current.
4 SENSE Current Sense
5 VCC Supply voltage of driver and control circuits
6 GATE Gate driver output
Document number:DS38882 Rev. 4 - 2 3 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Functional Block Diagram FB SENSE 6.4R DEM GATE GND VCC VDD Line Voltage Detector Valley Switching SOVP4V IL_OPP BNO Valley OSC tB1 tB2 Burst0.6V/0.7V 1.3V 65ms OLP Soft Start LEB Jitter D CLK Q OPP QR Law tB1 tB2 Valley QR_ON ON Logic IL_OPP ON Power & Fault Management VCC 16V/7.6V Bias VDD 28V VCC_OVP VCC_OVP OLP OTP SOVP 1.8V FOCP FOCP BNO tB1 tB2 Burst FOCP VDD SUVP1V
Document number:DS38882 Rev. 4 - 2 4 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage 35 V IO Gate Output Current 350 mA VFB, VSENSE, VDEM Input Voltage to FB, SENSE,DEM -0.3 to 7 V θJA Thermal Resistance (Junction to Ambient) 250 °C/W PD Power Dissipation at TA < +25°C 500 mW TJ Operating Junction Temperature -40 to +150 °C TSTG Storage Temperature Range +150 °C – ESD (Human Body Model) 3000 V – ESD (Machine Model) 200 V Note: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Condi tions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Supply Voltage 10 28 V TA Ambient Temperature -40 +85 °C
Document number:DS38882 Rev. 4 - 2 5 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Electrical Characteristics (@TA = -40 to +85° C, VCC = 18V, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit Supply Voltage (VCC Pin) IST Startup Current – – 1 5 μA ICC Operating Supply Current VFB = 4V, CL = 1nF (Note 5) 1.2 1.8 2 mA ICC-FAULT Operating Current If Fault Occurs VFB = 4V, VCS = 0V (Note 5) 0.25 0.4 0.55 VST Startup Voltage – 14.5 15.8 16.5 V VM VCC Maintain – 8.4 8.9 9.4 V VUVLO Shutdown Voltage – 7.1 7.6 8.1 V VCC-OVP VCC OVP – 31 32 33 V PWM Section/Oscillator Section fOSC-MAX Maximum Clamp Frequency – 105 120 135 kHz fOSC-MIN Minimum Clamp Frequency – 18 22 25 kHz Current Sense Section (SENSE Pin) VCS-MAX Maximum SENSE Voltage For Valley One IDEM_SOURCE = 150µA 0.89 0.96 1.04 V VTH-FOCP FOCP Voltage – 1.6 1.8 2.0 V tDELAY-FOCP FOCP Debounce Time (Note 6) – – 6 – Cycles tLEB LEB Time of SENSE – 150 250 350 ns tDELAY-CS Delay to Output (Note 6) – – 150 – ns Feedback Input Section (FB Pin) KFB-CS The Ratio of Input Voltage to Current Sense Voltage – – 3 – V/V RFB Input Impedance – 15 20 25 kΩ IFB-SOURCE Source Current VFB = 0V 0.15 0.25 0.35 mA GQR QR Mode Frequency Modulation Slope Versus VFB – – 94 – kHz/V VBURST Threshold for Entering Burst Mode – 1.35 1.55 1.75 V VFB-OLP Over Load Protection – – 4.5 – V tON-MAX Maximum on Time – 17 20 24 μs tSOFT-ST Soft-Start Time (Note 6) – – 5 – ms tDELAY-OLP Delay of Over Load Protection – – 70 – ms
Document number:DS38882 Rev. 4 - 2 6 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Electrical Characteristics (Cont.) (@TA = -40 to +85° C, VCC = 18V, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit Output Section (GATE Pin) VGATE-L Output Low Level IO = 20mA, VCC = 12V – – 1 V VGATE-H Output High Level IO = 20mA, VCC = 12V 8 – – V VGATE-CLP Output Clamping Voltage – 11 13 15 V tGATE-RISE Rising Time (Note 6) CL = 1nF, VCC = 13V – 140 230 ns tGATE-FALL Falling Time (Note 6) CL = 1nF, VCC = 13V – 50 120 ns Demagnetization Section (DEM Pin) VTH-DEM De-Magnetization Voltage(Note 6) – – 75 – mV IBNI Brown In Reference – 70 78 86 μA IBNO Brown Out Reference – 72 79 84 μA VTH-SOVP SOVP Threshold – 4.05 4.2 4.35 V VTH-SUVP SUVP Threshold (Note 6) – – 1 – V tSAMPLE Sample Delay Time (Note – – 1.85 – µs Delay Time Section tDELAY-BNO Brown Out Debounce Time – – 50 – ms tDELAY-HICCUP Delay of Hiccup Protection (Note 6) SOVP, SUVP, Vcc OVP – 6 – Cycles tBLANK-SUVP SUVP Blank Time After Startup – – 30 – ms Internal OTP Section OTP OTP Threshold (Note 6) – – +150 – °C THYS OTP Recovery Hysteresis Notes: 5. Data measured in IC test mode. 6. Guaranteed by design.
Document number:DS38882 Rev. 4 - 2 7 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Performance Characteristics Startup Voltage vs. Ambient Temperature Shutdown Voltage vs. Ambient Temperature Startup Current vs. Ambient Temperature Operating Current vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Startup Current (A) Ambient Temperature ( o VCC OVP vs. Ambient Temperature Green Mode Frequency vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 Startup Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 6.6 6.8 7.0 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 8.8 9.0 Shutdown Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Operating Current (mA) Ambient Temperature ( o VFB=3V, CL=0nF -40 -20 0 20 40 60 80 100 120 31.0 31.2 31.4 31.6 31.8 32.0 32.2 32.4 32.6 32.8 33.0 VCC OVP (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 31.0 31.2 31.4 31.6 31.8 32.0 32.2 32.4 32.6 32.8 33.0 VCC OVP (V) Ambient Temperature ( o
Document number:DS38882 Rev. 4 - 2 8 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Performance Characteristics (Cont.) Maximum Clamp Frequency vs. Ambient Temperature FB Pin Input Impedance vs. Ambient Temperature VBURST vs. Ambient Temperature IBNI vs. Ambient Temperature SOVP Threshold vs. Ambient Temperature VM vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 100 105 110 115 120 125 130 135 140 145 150 Maximum Clamp Frequency (kHz) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 VBURST (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 100 IBNI (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 VM (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 FB Pin Input Impedance (k) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 4.0 4.1 4.2 4.3 4.4 VTH-SOVP (V) Ambient Temperature ( o
Document number:DS38882 Rev. 4 - 2 11 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Operation Description (Cont.) Start-Up Current and UVLO The start-up current of the AP3302 is optimized to realize ultra low current (1A typical) so that VCC capacitor can be charged more quickly. The direct benefit of low start-up current is the availability of using large start-up resistor, which minimizes the resistor power loss for high voltage AC input. An UVLO comparator is included in AP330 2 to detect the voltage on VCC pin. It ensures that AP330 2 can draw adequate energy from VCC capacitor during power-on. VCC Maintain Mode During some transient load condition, V FB will drop below 1.55V, thus the PWM drive signal will be stopped, and there is no more energy transferring to the output side and auxiliary winding VCC supply. Therefore, the IC VCC voltage may reduce to the UVLO threshold voltage which will results in unexpected system restart. To avoid this failure condition, the AP3302 has a so-called VCC maintain mode to maintain VCC voltage above UVLO. Whenever VCC decreases to a setting threshold as V M, the VCC maintain mode will be awaked and AP3302 will output a driving pulse to turn on primary switch for providing enough energy to VCC capacitor. Leading-Edge Blanking Time A narrow spike on the leading edge of the current waveform can usually be observed when the power MOSFET is turn ing on. A 250ns leading - edge blank is built -in to prevent the false -trigger caused by the turn -on spike. During this period, the current limit comparator and the PWM comparator are disabled and the gate driver cannot be switched off. At the time of turning -off the MOSFET, a negative undershoot (maybe larger than -0.3V) can occur on the SENSE pin. So it is strongly recommended to add a small RC filter or at least connect a resistor “R” on this pin to protect the IC (Shown as Figure 4). SENSE GATE 6 Large undershoot (more than -0.3V) may damage the SENSE pin R C Necessary Figure 4 Protections Brown In and Brown Out The AP3302 can easily achieve brown in and brown out protection with the help of an external setting resistor. To determine the brown in voltage, according to the formula: mainly determines the brown in voltage, it’s the upper resistor connected to the DEM Pin as shown in figure 5. Vindc is the peak value of targeted brown-in AC voltage, Np is the primary winding turns and the Naux is the auxiliary winding turns. When the system is plugged in, the AP3302 will output 4 switching pulses to identify the AC voltage value, when the primary MOSFET turns on, the DEM Pin is clamped to GND and a current will flow out of the DEM pin, pas sing through and the auxiliary winding. The smaller , the larger . If the IC controller detects that is larger than for the continuous 4 cycles, the IC will start outputting driving signal normally. Otherwise, whenever the is lower than for a period of tDELAY-BNO, it will trigger the brown out protection and the IC will stop outputting driving signal.
Document number:DS38882 Rev. 4 - 2 12 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Operation Description (Cont.) DEM
3 Line Voltage
IL_OPP IL_BNO Auxiliary RDEM RSOVP RBNO ROPP OCPVREF1 BNO VREF_H VREF_L 1 1: HV Gate Rs RF CF SENSE Inside AP3302 SOVP4.2V SUVP1V IDEM Vs Figure 5 Constant Over Current Protection Cycle-by-cycle current limit is a popular method to achieve output over current protection. Actually, the turn -off delay of the MOSFET and the higher switching frequency always result in the higher OCP current at high line voltage. To obtain a constant OCP current value with universal input voltage, AP3302 adopts an effective line compensation circuitry. The function block is illustrated in figure 5. The current which reflects line voltage is scaled down and inversed to within AP3302, this flows through the inner compensation resistor and an external compensation resistor , and then the final line compensation voltage is formed as As above formula indicate s, changing the compensation voltage at different line voltage is a good way to balance the OCP current. In a real system, usually keep the value fixed when the BNO voltage is set up, to change the line compensation voltage, a good solution is to change . Whenever the is changed, adjust the at the same time to offer an enough RC time to filter the spike on SENSE pin. Secondary OVP and UVP The AP3302 provides output OVP and UVP protection function. The auxiliary winding voltage during secondary rectifier conducting period reflects the output voltage. R efer to figure 5,a voltage divider network containing and is connected to the auxiliary wi nding and DEM Pin, the DEM Pin will detect the equivalent output voltage with a delay of t SAMPLE from the falling edge of GATE driver signal, as shown in figure 6. The detected voltage will be compared to the SOVP and SUVP threshold voltage V TH-SOVP and VTH-SUVP. If the SOVP or SUVP threshold is reached continuously by 6 switching cycles, the SOVP or SUVP protection will be triggered, the AP3302 will shut down and the system will restart when the VCC voltage falls below the UVLO voltage. To prevent from false-trigger of SUVP during start up consequence, a blank time of tBLANK-SUVP is set during which the SUVP protection function is ignored.
Document number:DS38882 Rev. 4 - 2 13 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Operation Description (Cont.) VAUX VDEM Gate tSAMPLE Figure 6 Internal OTP Protection Function The AP3302 integrates an internal temperature sensor. It has a trigger window of +150° C enter and +125° C exit. The internal OTP protecti on mode is auto-recovery mode. Other Protections: FOCP, SSCP, VCC OVP and Pin Fault The AP3302 provides versatile protection to ensure the reliability of the power system. FOCP protection is an ultra fast short -current protection which is helpful to avoid catastrophic damage of the system when the secondary rectifier is short. The primary peak current w ill be monitored by SENSE pin through a primary sense resistor, whenever the sampled voltage reaches the threshold of VTH-FOCP for 6 switching cycles continuously, the FOCP protection will be active to shut down the switching pulse. SSCP might be triggered at ultra low l ine voltage condition or other failure condition that short the SENSE pin to ground. The SSCP module senses the voltage across the primary sense resistor with a del ay of 3 s after the rising edge of primary GATE signal, this sensed signal is compared with VTH-SSCP, if it is lower than VTH-SSCP for 6 switching cycles, the SSCP protection will be triggered and the drive signal will be disabled. All these protections described above will restart the sy stem when the V CC voltage falls below UVLO. The AP3302 also has pin fault connection protection including floating and short connection. The floating pin protection incl udes the SENSE, FB, etc. The short pin protection includes the DEM pin short protection. When these pins are floated or DEM pin is shorted to ground, PWM switching will be disabled, thus protecting the power system.
Document number:DS38882 Rev. 4 - 2 14 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302
Ordering Information
TR : Tape & Reel G1 : Green Product Name RoHS/GreenPackage K6 : SOT26 Package Part Number Marking ID Packing SOT26 AP3302K6TR-G1 GTE 3000 / Tape & Reel Marking Information (Top View) : Logo XXX: Marking ID (See Ordering Information)
Document number:DS38882 Rev. 4 - 2 15 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SOT26 2.820(0.111) 3.100(0.122) 2.650(0.104) 3.000(0.118) 1.500(0.059) 1.700(0.067) 0.950(0.037)TYP 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.500(0.020) 0.700(0.028)REF 0.100(0.004) 0.200(0.008) 0.200(0.008) 0.300(0.012) 0.600(0.024) 0.000(0.000) 0.150(0.006) 0.900(0.035) 1.300(0.051) 1.450(0.057) MAX 1 2 3 456 Pin 1 Mark
Document number:DS38882 Rev. 4 - 2 16 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 Suggested Pad Layout (1) Package Type: SOT26 E E G Z Y X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number:DS38882 Rev. 4 - 2 17 of 17 www.diodes.com March 2017 © Diodes Incorporated AP3302 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other c hanges without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license unde r its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diod es Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product nam es and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this do cument is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Cus tomers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2017, Diodes Incorporated www.diodes.com