A Product Line of Diodes Incorporated AP3776 LOW POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER Description Pin Assignments NEW PRODUCT The AP3776 is a high performance AC/DC power supply controller for battery charger and adapter applications. It can meet less than 10mW standby power for "Super Star" charger criteria. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. (Top View) The AP3776 provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability. IS 1 8 FB EM 2 7 CPC VCC 3 6 VCS OUT 4 5 GND The AP3776 achieves excellent regulation and high average efficiency, less than 10mW no-load power consumption and less than 1s startup time. When AP3776 is used with AP4341, APR343 or APR3415, good under-shoot performance and higher conversion efficiency can be achieved. SO-8 This IC is available SO-8 package. Features Applications Primary Side Control for Eliminating Opto-coupler 10mW No-load Input Power Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus Compensation for External Component Temperature Variations Standby and Auxiliary Power Supplies Flyback Topology in DCM Operation Random Frequency Adjustment to Reduce System EMI Semi-valley Turn on for the Higher Efficiency Built-in Soft Start Over Voltage Protection Over Temperature Protection Short Circuit Protection AP4341, APR343 or APR3415 Awaking Signal Detection Audio Noise Reduction Internal Cable Compensation SO-8 Package Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. "Green" Device (Note 3) 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 Halogen- 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. AP3776 Document number: DS36707 Rev. 4 - 2 1 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Typical Applications Circuit FR1 TR1 L1 D1 C4 NTC NEW PRODUCT D2,D4, D5,D6 R8 R13 C11 + C12 R24 R26 + D7 + R15 OUT VCC GND R12 + C22 C21 IC2 AP4341 VO L2 D8 C3 R9 Q1 IC1 AP3776 VCS R10 R4 OUT CPC R7 D3 VCC FB C9 GND EM IS R5 R1 R3 R2 R6 Typical Application of AP3776 with AP4341 (VOUT=5V/1A or 2A) L1 T1 C4 NTC D2,D4, D5,D6 R8 R13 C11 + C12 C24 C20 C23 Q2 R21 D8 C3 C22 R9 VDET R4 OUT CPC R20 APR343 DRISR D3 GND R10 VCC AREF IC2 Q1 IC1 AP3776 R7 + R12 L2 VCS + R23 D7 + R15 VCC FR1 R22 FB C9 GND R5 EM IS C21 R1 R2 R3 R6 CY1 Typical Application of AP3776 with APR343 (VOUT=5V/2A or 2.4A) AP3776 Document number: DS36707 Rev. 4 - 2 2 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Typical Applications Circuit (Cont.) FR1 L1 T1 C4 NTC R8 R13 D2,D4, D5,D6 NEW PRODUCT C11 + C12 C21 + C23 D7 + R15 C22 + R21 R12 IC2 APR3415 L2 D8 R9 C3 R23 Q1 IC1 AP3776 VCS R10 VDET VCC DRISR AREF R24 C24 R22 R4 OUT CPC R7 GND GND C25 D3 VCC DRAIN DRAIN FB C9 GND R5 EM IS R1 R2 R3 R6 CY1 Typical Application of AP3776 with APR3415 (VOUT=5V/2A or 2.4A) Pin Descriptions Pin Number Pin Name 1 IS Primary current sensing 2 EM Connected to the source of external power MOSFET 3 VCC Power supply 4 OUT Driving the gate of external power MOSFET 5 GND Ground 6 VCS Current sensing voltage 7 CPC Connecting a capacitor for output cable compensation 8 FB AP3776 Document number: DS36707 Rev. 4 - 2 Function Voltage feedback 3 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Functional Block Diagram VCC 3 Auto-restart Hiccup Regulator & Bias NEW PRODUCT UVLO FB OVP/OCKP/OTP/Rcs_ short_protection 8 PRO UVLO 0.05V COMP Tonsec Detector PFM TONS Dynamic Response 4 VFB Constant Voltage Control EA Pro Tdelay Dyn R Q PFM Driver CV_ctrl CC_ctrl 1 S Line Compensation VCS 6 TONS Peak Current Control & LEB VREF1 VREF2 VREF3 2 OUT EM IS Shutdown Pre_Shutdown Constant Current Control R Q Audio noise Suppression CC_ctrl S 5 GND Tdelay Cable Compensation Light Load Detection LL 7 CPC AP3776 Document number: DS36707 Rev. 4 - 2 4 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Absolute Maximum Ratings (Note 4) Symbol Rating Unit Voltage at VCC to GND Parameter -0.3 to 28 V - Voltage at OUT, EM to GND -0.3 to 23 V - Voltage at IS, VCS, CPC to GND -0.3 to 7 V - FB Input -40 to 10 V - Output Current at OUT Internally limited A TJ Operating Junction Temperature +150 C -65 to +150 C NEW PRODUCT VCC TSTG Storage Temperature TLEAD Lead Temperature (Soldering, 10 Sec) +300 C Thermal Resistance Junction-to-Ambient +190 C/W Human Body Model 6000 V Charged Device Model 2500 V Machine Model 200 V JA Electrostatic Discharge Capability ESD Note 4: Stresses greater than those listed under "Absolute Maximum Ratings" may 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 may affect device reliability. Electrical Characteristics Symbol (@TA=+25C, VCC=15V, unless otherwise specified.) Parameter Conditions Min Typ Max Unit UVLO SECTION VTH(ST) VOPR(Min) Start-up Threshold - 11 13 14 Minimal Operating Voltage After turning on 5.3 6.1 7.0 0 0.2 0.6 60 100 130 160 280 330 V STANDBY CURRENT SECTION IST VCC=VTH(ST)-1V, Before turning on No load at OUT pin, Standby Mode No load at OUT pin, Normal Mode Start-up Current ICC(STB) Standby Mode Quiescent Current ICC(QST) Normal Mode Quiescent Current A CURRENT SENSE SECTION VCS Current Sense Threshold (Note 5) - 425 450 465 mV tLEB Leading Edge Blanking (Note 6) - 300 500 700 ns FEEDBACK INPUT SECTION RFB Input Resistance of FB Pin VFB=4V 0.5 0.7 0.9 M VFB Feedback Threshold Voltage - 3.64 3.7 3.76 V - 0.55 0.7 0.85 S - 6 7 8 % LINE COMPENSATION SECTION gm Line Compensation Transconductance (Note 7) CABLE COMPENSATION SECTION VFB _CABLE/VFB % Cable Compensation Voltage AP3776 Document number: DS36707 Rev. 4 - 2 5 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Electrical Characteristics (Cont.) (@TA=+25C, VCC=15V, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit DRIVE OUTPUT SECTION Gate Clamp Voltage VCC=20V, CL=1nF - 14 16 V Source Current - 55 67 80 mA Sink Current - 400 500 600 mA Maximum Off Time - 15 19 30 ms Delay Time for Dynamic Function - 100 140 220 s Trigger Voltage for Dynamic Function - 60 100 120 mV tonp(MAX) Maximum On Time of Primary Side - 16 25 40 s VFB(OVP) Over Voltage Protection - 6.5 7.5 8.5 V VFB(SCP) Short Circuit Protection - 2.38 2.50 2.62 V - Over Temperature Protection (Note 8) Junction Temperature +110 +130 +150 C - Temperature Hysteresis (Note 8) - - +20 - C VGATE_CLAMP ISOURCE NEW PRODUCT ISINK tOFF(MAX) DYNAMIC FUNCTION SECTION tD VTRIGGER PROTECTION SECTION Notes: 5, VCS is an equivalent parameter tested in closed loop to ensure the precise constant current. 6. The minimum power switch turn on time. 7. Line compensation voltage on CS pin: VCS VIN _ DC 8. Guaranteed by design. AP3776 Document number: DS36707 Rev. 4 - 2 N AUX R 17 gm R5 N PRI R 16 R 17 6 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Performance Characteristics Start-up Threshold vs. Temperature Start-up Current vs. Temperature 0.40 16.0 15.5 0.35 Start-up Current (A) Start-up Threshold (V) 14.5 14.0 13.5 13.0 12.5 12.0 0.30 0.25 0.20 0.15 0.10 11.5 11.0 0.05 10.5 10.0 -40 -20 0 20 40 60 80 100 0.00 -40 120 -20 0 Minimum Operating Voltage vs. Temperature 60 80 100 120 Standby Mode Quiescent Current vs. Temperature 8.0 Standby Mode Quiescent Current (A) 120 7.5 Minimal Operating Voltage (V) 40 o Temperature ( C) 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 -40 20 Temperature ( C) o -20 0 20 40 60 80 100 110 100 90 80 70 60 50 -40 120 o Temperature ( C) -20 0 20 40 60 80 100 120 o Temperature ( C) Normal Mode Quiescent Current vs. Temperature 320 Normal Mode Quiescent Current (A) NEW PRODUCT 15.0 310 300 290 280 270 260 250 240 -40 -20 0 20 40 60 80 100 120 o Temperature ( C) AP3776 Document number: DS36707 Rev. 4 - 2 7 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Function Description Operation Description 1. Start-up Circuit VBULK VBULK R13 R13 R15 R15 NEW PRODUCT C3 D8 R9 C3 D8 Q1 VCC Q1 VCC I SOURCE OUT OUT OUT OUT EM VDD R9 EM IS IS (a) (b) Figure 1. The AP3776 Start-up Circuit Figure1 (a) shows the Startup Phase * Before VCC reaches VTH(ST), VDD is zero and EM to IS pin is open. * C3 is charged by ISOURCE. * The resistance of R13 and R15 should be big enough to reduce the power dissipation. Figure1 (b) shows the Normal Operation Phase * When VCC reaches VTH(ST), VDD is high and EM to IS pin is short. * * The voltage of EM pin is lower than 1V so that the four diodes in chip are open. C3 is supplied by Aux. winding of transformer. 2. Operation Mode The typical application circuit of AP3776 is a conventional Flyback converter with a 3-winding transformer---primary winding (NP), secondary winding (NS) and auxiliary winding (NAUX), as shown in typical application of AP3776 with AP4341. The auxiliary winding is used for providing VCC supply voltage for IC and sensing the output voltage feedback signal to FB pin. Figure 2 shows the typical waveforms which demonstrate the basic operating principle of AP3776 application. And the parameters are defined as following. * IP---The primary side current * IS ---The secondary side current * IPK---Peak value of primary side current * IPKS---Peak value of secondary side current * VSEC---The transient voltage at secondary winding * VS---The stable voltage at secondary winding when rectification diode is in conducting status, which equals the sum of output voltage * * VOUT and the forward voltage drop of diode VAUX---The transient voltage at auxiliary winding VA--- The stable voltage at auxiliary winding when rectification diode is in conducting status, which equals the sum of voltage V CC and * * * * the forward voltage drop of auxiliary diode tSW ---The period of switching frequency tONP ---The conduction time when primary side switch is "ON" tONS ---The conduction time when secondary side diode is "ON" tOFF ---The dead time when neither primary side switch nor secondary side diode is "ON" * tOFFS --- The time when secondary side diode is "OFF" AP3776 Document number: DS36707 Rev. 4 - 2 8 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Function Description (Cont.) IPK IP IPKS tOFFS NEW PRODUCT IS VA VAUX VS VSEC tONP tONS tOFF Figure 2. The Operation Waveform of Flyback PSR System For primary-side regulation, the primary current ip(t) is sensed by a current sense resistor RCS (R5,R6 as shown in Typical Application of AP3776).The current rises up linearly at a rate of: dip (t ) Vin (t ) dt LM (1) As illustrated in Figure 2, when the current ip(t) rises up to IPK, the switch Q1 turns off. The constant peak current is given by: I PK VCS RCS (2) The energy stored in the magnetizing inductance LM each cycle is therefore: Eg 1 2 LM I PK 2 (3) So the power transferring from the input to the output is given by: P 1 2 LM I PK f SW 2 (4) Where, the fSW is the switching frequency. When the peak current IPK is constant, the output power depends on the switching frequency f SW. The maximum frequency for AP3776 system is about 84kHz. Constant Voltage Operation As to constant-voltage (CV) operation mode, the AP3776 detects the auxiliary winding voltage at FB pin to regulate the output voltage. The auxiliary winding voltage is coupled with secondary side winding voltage, so the auxiliary winding voltage at secondary rectification diode D1 conduction time is: V AUX N AUX VOUT Vd NS (5) Where the Vd is the diode forward voltage drop. AP3776 Document number: DS36707 Rev. 4 - 2 9 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 NEW PRODUCT Function Description (Cont.) 0V Tsample Tons Figure 3. Auxiliary Voltage Waveform The voltage detection point is at 2/3 of the D1 on-time. The voltage detection point is changed with the different primary peak current. The CV loop control function of AP3776 then generates a D1 off-time to regulate the output voltage. Constant Current Operation The AP3776 can work in constant-current (CC) mode. Figure 2 shows the secondary current waveforms. In CC operation mode, the CC control loop of AP3776 will keep a fixed proportion between D1 on-time Tons and D1 off-time Toffs. The fixed proportion is Tons 4 Toffs 4 (6) The relationship between the output current and secondary peak current I PKS is given by: 1 Tons I OUT I PKS 2 Tons Toffs (7) As to tight coupled primary and secondary winding, the secondary peak current is I PKS NP I PK NS (8) Thus the output constant-current is given by: I OUT 1 NP Tons 2 N I PK P I PK 2 NS Tons Toffs 8 N S (9) Therefore, AP3776 can realize CC mode operation by constant primary peak current and fixed diode conduction duty cycle. Multiple Segment Constant Peak Current As to the original PFM PSR system, the switching frequency decreases with output current decreasing, which will encounter audible noise issue since switching frequency decrease to audio frequency range, about less than 20kHz. In order to avoid audible noise issue, AP3776 uses 3-segment constant primary peak current control method. At constant voltage mode, the current sense threshold voltage is multiple segments with different loading, as shown in Figure 4, which are VCS_H for high load, VCS_M for medium load and VCS_L for light load. At constant current mode, the peak current is still V CS_H. As to no load and ultra light load condition (LL mode), the current reference is also VCS_L. But the LL mode operating is different, which will be described in next section. It can be seen from the following Figure 4 that with multiple segment peak current control, AP3776 power system can keep switching frequency above 24kHz from light load to heavy load and guarantee the audible noise free performance. AP3776 Document number: DS36707 Rev. 4 - 2 10 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Function Description (Cont.) VCSREF VCS_H =0.45V VCS_M =2/3*0.45V NEW PRODUCT VCS_L =4/9*0.45V fSW 60kHz 56.7 kHz IOMAX 24kHz 20kHz 5 kHz 1.8%*IO 17.8%*IO 42%*IO 100%*IO IOMAX Figure 4. Multiple Segment Peak Current at CV Mode 3. The LL Mode Operating (Typical Application with APR343) At no load and light load, the AP3776 works in Low Light mode (LL mode) and the output voltage is detected by APR343. In order to achieve ultra low standby power in LL mode, the static current (ICC_NL) of the AP3776 is reduced from 280A to 100A. * The conditions of exiting LL mode---VCPC>65mV or tOFF<tDELAY+30s * The conditions of entering LL mode---VCPC<33mV and tOFFtDELAY+30s In LL mode, when the APR343 detects the output voltage is lower than its trigger voltage, the APR343 VDET pin emits a periodical pulse current. This pulse current will generate a pulse voltage on feedback winding through the transformer coupling. When the AP3776 detects this VPULSE (>100mV is valid), primary switch immediately turns on to provide one energy pulse to supply output terminal and primary VCC. To achieve low standby power, the lower switching frequency is necessary. But if the off time is too long, the VCC voltage will reduce to very low level. To avoid VCC being lower than VOPR(Min), a minimum switching frequency is specified by the APR343 (tDIS). If VOUT does not fall below trigger voltage during tDIS, APR343 VDET pin will emit the periodical pulse current and let the primary switch turn on. 4. Leading Edge Blanking When the power switch is turned on, a turn-on spike will occur on the sense-resistor. To avoid false-termination of the switching pulse, a 500ns leading-edge blanking (from power MOSFET on) is built in. During this blanking period, the current sense comparator is disabled and the gate driver can't be switched off. 5. Adjustable Line Compensation Since there is a constant delay time from the CS pin voltage reaching the given VCS reference to the power MOSFET turning off, the real primary peak current value always has a gap with the ideal value. The gap value changes with different input line voltage, which is caused by different current rising slope, results in different system constant current value. In order to eliminate the constant current deviation due to line voltage, the adjustable line compensation is introduced to AP3776 design. By sensing the negative voltage of FB pin which is linear to the line voltage, a current (ILINE) proportional to line voltage flows out from the CS pin to the resistor RLINE, and create an adjustable compensation voltage to clear up the primary current gap, so that the excellent line regulation of output current will be achieved. VCS _ LINE RLINE 0.4 N RFB 2 1 aux Vindc 700k RFB1 RFB 2 N p AP3776 Document number: DS36707 Rev. 4 - 2 11 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Function Description (Cont.) VAUX Tonp K=0.4 NEW PRODUCT OUT RFB1 S1 FB RFB2 RLINE ILINE 700k RCS VCS Figure 5. Adjustable Line Compensation Circuit 6. Fixed Cable Compensation As we know, CPC voltage reflects the power system loading percentage. By introducing a rising voltage, which is linear to CPC voltage, to the FB reference voltage, AP3776 can realize the fixed cable compensation to match the voltage drop at output cable. The cable compensation is 7% (typ). Protection 1. FB Over Voltage Protection (OVP) When the voltage of FB pin exceeds VFB(OVP) at Tons period, AP3776 immediately shuts down for tOFF(MAX) and then detects the FB voltage again to see if VFB(OVP) condition is removed. The VCC voltage will drop during the tOFF(MAX). When VCC is still higher than VOPR(Min) after tOFF(MAX), and VFB(OVP) condition is removed, the IC will enter normal operating mode; but if VFB(OVP) condition is not removed, AP3776 will remain shut down and wait for another tOFF(MAX). When VCC drops to VOPR(Min) during the tOFF(MAX), AP3776 will enter the restart mode, and VCC voltage changes between VTH(ST) and VOPR(Min) until VFB(OVP) condition is removed. 2. Open Circuit Protection (OCKP) If the down resistance of FB pin short or up resistance open, there will be no voltage on FB pin, so the sample signal can't be monitored, and the OCKP protection will be triggered. The protection operating process is the same as over voltage protection process. 3. Short Circuit Protection (SCP) Short Circuit Protection (SCP) detection principle is similar to the normal output voltage feedback detection by sensing FB pin voltage. When the detected FB pin voltage is below VFB(SCP) for a duration of about tOFF(MAX), the SCP is triggered. Then the AP3776 enters hiccup mode that the IC immediately shuts down and then restarts, so that the VCC voltage changes between VTH(ST) and VOPR(Min) until VFB(SCP) condition is removed. As to the normal system startup, the time duration of FB pin voltage below VFB(SCP) should be less than tOFF(MAX) to avoid entering SCP mode. But for the output short condition or the output voltage below a certain level, the SCP mode should happen. Figure 6 shows the AP3776 normal start-up waveform. If the voltage of FB pin reaches above VFB(SCP) during tOFF(MAX) after VCC gets to the VTH(ST), the IC doesn't enter the SCP mode. Figure 7 shows that VOUT is short and the voltage of FB pin is lower than VFB(SCP) during tOFF(MAX), then the AP3776 triggers the SCP and enters the hiccup mode. AP3776 Document number: DS36707 Rev. 4 - 2 12 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Function Description (Cont.) tOFF(MAX) VTH(ST) VCC VFB(SCP) NEW PRODUCT VFB 5V VOUT(SCP) VOUT Figure 6. Normal Start-up tOFF(MAX) VTH(ST) VCC VOPR(MIN) VFB(SCP) VFB VOUT 0V Figure 7. Short Circuit Protection (SCP) and Hiccup Mode 4. RCS Short Protection When the primary side current sense resistance is shorted, the primary side current rapidly increases, and the transformer saturates, which leads to some components' damage. The AP3776 draws in the RCS short protection to avoid the damage. If the voltage of CS pin is smaller than 0.15V at the primary side maximum on time tonp(MAX), the RCS short protection is triggered, and the AP3776 immediately shuts down, and then restarts. 5. Over Temperature Protection (OTP) When the IC junction temperature exceeds the thermal shutdown temperature threshold of +130C, the device shuts down immediately. Retry is allowed if junction temperature reduces by hysteresis temperature value. AP3776 Document number: DS36707 Rev. 4 - 2 13 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Ordering Information AP3776 X XX - G1 NEW PRODUCT Product Name Package Packing RoHS/Green M : SO-8 TR : Tape & Reel G1 : Green Package Temperature Range SO-8 -40 to +85C Part Number AP3776MTR-G1 Marking ID 3776M-G1 Packing 4000/Tape & Reel Marking Information (Top View) 3776M -G1 YWWAXX - AP3776 Document number: DS36707 Rev. 4 - 2 3776M-G1: 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. 14 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SO-8 4.700(0.185) 5.100(0. 201) 7 ~ 9 0.320(0. 013) TYP 1.350(0. 053) 1.750(0. 069) NEW PRODUCT 8 8 ~ 9 7 0.600(0. 024) 0.725(0. 029) D 5.800(0. 228) 6.200(0. 244) 1.270(0. 050) TYP D 20:1 0.300(0. 012) R0.150(0.006) 0.100(0. 004) 1.000(0. 039) TYP 3.800(0. 150) Option 1 4.000(0. 157) 0.300(0. 012) 0.150(0. 006) 0.250(0. 010) Option 1 0 8 1 7 0.510(0. 020) R0.150(0.006) 0.450(0. 017) 0.820(0. 032) Option 2 0.350(0. 014) TYP Note: Eject hole , oriented hole and mold mark is optional . AP3776 Document number: DS36707 Rev. 4 - 2 15 of 17 www.diodes.com February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 Suggested Pad Layout (1) Package Type: SO-8 NEW PRODUCT Grid placement courtyard G Z Y E Dimensions Value Z (mm)/(inch) 6.900/0.272 AP3776 Document number: DS36707 Rev. 4 - 2 G (mm)/(inch) 3.900/0.154 X X (mm)/(inch) 0.650/0.026 16 of 17 www.diodes.com Y (mm)/(inch) 1.500/0.059 E (mm)/(inch) 1.270/0.050 February 2015 (c) Diodes Incorporated A Product Line of Diodes Incorporated AP3776 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). 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Copyright (c) 2015, Diodes Incorporated www.diodes.com AP3776 Document number: DS36707 Rev. 4 - 2 17 of 17 www.diodes.com February 2015 (c) Diodes Incorporated Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Diodes Incorporated: AP3776MTR-G1