AP3101 DIODES | Alldatasheet
Document overview
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Technical content
Features
Green Current Mode PWM Controller Adjustable Skip Level Leading Edge Blanking (LEB) Cycle by Cycle Current Limit Built-in Short Circuit Protection Built-in Synchronized Slope Compensation Low Start-up/Operating Current: 30μA/3mA Adjustable Oscillator Frequency Totem Pole Output Including Soft Driving Under-Voltage Lockout (UVLO) Accurate Over-Temperature Protection with Hysteresis Lead-Free Package: SO-8 Totally Lead-Free; RoHS Compliant (Notes 1 & 2) Lead-Free Package, Available in “Green” Molding Compound: SO-8 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) GND VIN FB RI GATE VCC SENSE ADJ SO-8
Applications
Off-line AC-DC Adapter Battery Charger Applications 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 (<1500pp m total Br + Cl) and <1000ppm antimony compounds.
Document number: DS37418 Rev. 2 - 2 2 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Typical Applications Circuit R11 2.5k C8 0.1F C3 22F R12 R10 9.5k 2nF 4.7k R4 20 NTC 6.2 R13 620 0.5 7N60 BD1 100k 12V/3A J2J1 100F U2 p521 AZ431 FR107 FR107 R8 27k 1.2M 470F 8HD3 1000F T 1000pF ADJ SENSE VIN RI GATE VCC FB GND AP3101 Pin Descriptions Pin Number Pin Name Function
1 GND Power ground
2 FB Feedback
3 VIN Start-up current in
4 RI Reference setting
5 ADJ Adjust the level of skip cycle
6 SENSE Current sense
7 VCC The positive supply of the control IC
8 GATE Driver output
Document number: DS37418 Rev. 2 - 2 3 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Functional Block Diagram ON/OFF Driver OSC LEB VCC Slope Compensation Short Circuit Protection Q D CLK RB Skip Cycle 16V/10V RI VCC VIN GND R GATE ADJ FB SENSE Internal Bias UVLO OTP PWM R Current Limit 0.85V
Document number: DS37418 Rev. 2 - 2 4 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VCC Supply Voltage 30 V IO Gate Output Current 600 mA – Input Voltage to FB -0.3 to 7 V – Input Voltage to SENSE -0.3 to 7 V – Input Voltage to RI -0.3 to 7 V – Input Voltage to ADJ -0.3 to 7 V – Operating Junction Temperature +150 oC TSTG Storage Temperature Range -65 to +150 oC – ESD (Human Body Model) 4 kV – ESD (Machine Model) 400 V PD Power Dissipation at TA<+25oC 550 mW θJA Thermal Resistance (Junction to Ambient) 186 oC/W Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These ar e stress 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 rel iability. Recommended Operating Conditions Symbol Parameter Min Max Unit TA Operating Ambient Temperature -40 +85 oC VCC Supply Voltage – 20 V
Document number: DS37418 Rev. 2 - 2 5 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Electrical Characteristics (@TA=+25° C, VCC=15V, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit UNDER-VOLTAGE LOCKOUT SECTION VTHON Start-up Voltage – 15 16 17 V VTHOFF Minimum Operating Voltage – 9 10 11 V TOTAL STANDBY CURRENT SECTION – Start-up Current VCC=14.8V – 30 45 μA ICC Operating Current VFB=VSENSE=0V, CL=1nF – 3 4 mA PWM SECTION DMAX Maximum Duty Cycle – 70 80 90 % DMIN Minimum Duty Cycle – – – 0 % OSCILLATOR SECTION fOSC Oscillation Frequency RI=26kΩ 60 65 70 kHz – Frequency Change with Voltage VCC=10V to 20V – – 2 % – Temperature Stability TA=-40oC to +85oC – – 5 % FEEDBACK INPUT SECTION – The Ratio of Input Voltage to Current Sense Voltage – 2.5 3 3.5 V/V – Input Impedance – 3 4.5 6 kΩ – Source Current – – – -2 mA – Input Voltage for Zero Duty – – – 1.2 V CURRENT SENSE SECTION VTH Threshold Voltage – 0.8 0.85 0.9 V – Delay to Output – – 150 200 ns – Delay Time of Short Circuit Protection RI=26kΩ – 23 – ms OUTPUT SECTION VOL Low Level Voltage IO=200mA, VCC=12V – – 1.5 V VOH High Level Voltage IO=50mA, VCC=12V 8 – – V tR Rise Time VCC=13V, CL=1nF 150 250 350 ns tF Fall Time VCC=13V, CL=1nF 30 50 90 ns SKIP CYCLE SECTION VSKIP Default Skip Level – – 1.2 – V – Leading Edge Blanking RI=26kΩ 200 270 350 ns OVER-TEMPERATURE PROTECTION SECTION – Shutdown Temperature – – +155 – oC – Temperature Hysteresis – – +25 – oC
Document number: DS37418 Rev. 2 - 2 6 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Performance Characteristics Oscillator Frequency vs. Ambient Temperature Start-up Current vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 Oscillator Frequency (kHz) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 Start-up Current (A) Ambient Temperature ( o Operating Current vs. Ambient Temperature Start-up Voltage vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 Operating Current (mA) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 15.3 15.4 15.5 15.6 15.7 15.8 15.9 16.0 16.1 16.2 16.3 Start-up Voltage (V) Ambient Temperature ( o Minimum Operating Voltage vs. Duty Cycle vs. Ambient Temperature Ambient Temperature -40 -20 0 20 40 60 80 100 120 Duty Cycle (%) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 9.6 9.7 9.8 9.9 10.0 10.1 10.2 Minimum Operating Voltage (V) Ambient Temperature ( o
Document number: DS37418 Rev. 2 - 2 7 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Performance Characteristics (Cont.) Skip Level vs. Ambient Temperature Oscillator Frequency vs. Timing Resistor -40 -20 0 20 40 60 80 100 120 1.14 1.16 1.18 1.20 1.22 1.24 1.26 Skip Level (V) Ambient Temperature ( o 12 15 18 21 24 27 30 33 36 39 42 105 120 135 Oscillator Frequency (kHz) Timing Resistor (k) Operation Description The AP3101 is specially designed for off-line AC-DC adapter and battery charger applications. It offers the designer a cost effective solution with minimal external components. Oscillator The oscillation frequency is programmed by the value of resistor R1 connected from pin RI to ground. The resistor will make a constant current source to determine the oscillation frequency by charging and discharging an internal capacitor. The oscillation frequency can be expressed as: )kHz()k(1R 1690f The recommended oscillation frequency is 50 to 100kHz. Start-up Current and Operating Current The typical start-up current is only 30μA. With such a low start-up current, the start -up resistor may have a very high resistance value even in 85V line voltage; however, higher resistance will cause longer start -up time. So we must select a pr oper start-up resistor and a proper VCC hold- up capacitor. Operating current is lowered to 3mA. It can reduce the requirement of VCC hold-up capacitor value and the power loss in AP3101. Under-Voltage Lockout (UVLO) An UVLO comparator is included in AP310 1 to detect the voltage on the VCC pin. It ensures AP3101 to draw adequate energy from hold -up capacitor during power on. The turn-on threshold is 16V and the turn-off threshold is 10V. Current Sense Comparator and PWM Latch AP3101 operates as a current m ode controller, the output switch conduction is initiated by every oscillator cycle and terminated when the peak inductor current reaches the threshold level established by the FB pin. The inductor current signal is converted to a voltage signal by inserting a referenced sense resistor RS in series with the source of the MOSFET. The peak inductor current under normal operating conditions is controlled by the voltage at FB pin: SFBpk R3/)9.0V(I Abnormal operating conditions occur when the power supp ly output is overloaded or the output voltage sensing is lost. Under these conditions, the current sense comparator threshold will be internally clamped to 0.85V. Therefore the maximum peak switch current is: S(m ax)PK R/85.0I
Document number: DS37418 Rev. 2 - 2 8 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Operation Description (Cont.) Leading Edge Blanking A narrow spike on the leading edge of the current waveform can usually be observed when the p ower MOSFET is turned on. A 270 ns leading- edge blank is built -in to prevent the false -triggering caused by the turn -on spike; so t he RC filter on the current sense input can be removed. During this period, the current limit comparator is disabled and the gate driver cannot be switched off. Built-in Slope Compensation It is well known that a continuous current mode SMPS may become unstable when the duty cycle exceeds 50%. The built-in slope compensation can improve the stability, so there is no need for design engineer to spend much time on that. Short Circuit Protection Built-in short circuit protection can protect a SMPS from bein g damaged when short circuit of output or over load conditions happen. The feedback voltage will keep its value above its upper limit of 4.2V as long as short circuit exists, and then gate driver will be turned off after fixed delay time of 23ms. When VCC of AP3101 dropped under the minimum operating voltage, the device will be turned off and the system will try to restart. The SMPS will not recover its normal operation until the short circuit or over load is removed. Green Mode Operation ADJ pin is the no n-inverting input of skip cycle comparator. The voltage at FB pin minus 0.9V is compared with the voltage at ADJ pin. If the voltage at ADJ pin is higher, AP3101 will start to blank its output pulse. In normal operation, AP3101 works at fixed switching frequency, and VFB is in high level. When load power becomes lighter, the VFB will decrease. When VFB drops to the threshold, AP3101 will enter the skip cycle mode and operate intermittently. The threshold is adjustable by changing the value of the resistor connected from pin ADJ to the ground.
Document number: DS37418 Rev. 2 - 2 9 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated
Ordering Information
PackingPackageProduct Name TR : Tape & Reel E1 : Lead Free AP3101 X XX – XX E1/G1 M : SO-8 Blank : Tube G1 : Green Diodes IC's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Package Temperature Range Part Number Marking ID Packing Lead Free Green Lead Free Green SO-8 -40 to +85oC AP3101M-E1 AP3101M-G1 3101M-E1 3101M-G1 100/Tube AP3101MTR-E1 AP3101MTR-G1 3101M-E1 3101M-G1 4000/Tape & Reel Marking Information (Top View) First and Second Lines: Logo and Marking ID (See Ordering Information) Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch No. Pb Lead-Free
Document number: DS37418 Rev. 2 - 2 10 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SO-8 0 ° 8 ° 1 ° 7 ° R0.150(0.006) R0.150(0.006) 1.000(0.039) 0.300(0.012) 0.510(0.020) 1.350(0.053) 1.750(0.069) 0.100(0.004) 0.300(0.012) 3.800(0.150) 4.000(0.157) 7 ° 20:1 D 1.270(0.050) TYP 0.150(0.006) 0.250(0.010) 8 ° D 5.800(0.228) 6.200(0.244) 0.600(0.024) 0.725(0.029) 0.320(0.013) 8 ° 0.450(0.017) 0.820(0.032) 4.700(0.185) 5.100(0.201) Note: Eject hole, oriented hole and mold mark is optional. Option 1 Option 1 Option 2 0.350(0.014) TYP TYP TYP 9°~ 9°~
Document number: DS37418 Rev. 2 - 2 11 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated Suggested Pad Layout (1) Package Type: SO-8 Grid placement courtyard ZG Y E X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number: DS37418 Rev. 2 - 2 12 of 12 www.diodes.com July 2014 © Diodes Incorporated AP3101 A Product Line of Diodes Incorporated 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 th e right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability a rising out of the application or use of thi s document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such appli cations 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 repre sentatives harmless against all claims, damages, expenses, and attorney fees arising out 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 names 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 docu ment 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, Custom ers 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 © 2014, Diodes Incorporated www.diodes.com