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FAN105BM6X Offline Primary-Side-Regulation (PSR) Quasi-Resonant Valley Switch Controller FAN105B is offline Primary-Side-Regulation (PSR) PWM controller with Quasi-Resonant (QR) mode controller to achieved constant-voltage (CV) and constant-current (CC) control for Travel Adaptor (TA) requirement, and provide cost-effective, simplified circuit for energy-efficient power supplies. www.onsemi.com MARKING DIAGRAM FAN105B integrates proprietary operation of energy saving feature at no load, mWSaver Technology that combines our most energy efficient process and circuit technologies for power adapter design. FAN105B can be used in Travel Adapter design by stand-alone or co-work with secondary-side SR controller FAN6292B. When paired FAN105B with FAN6292B, both SR and USB Type-C connector are compatible to achieve higher power and advanced control applications. PXXEX - -- - Features mWSaver® Technology Provides Ultra-Low Standby Power Consumption for Energy Star’s 5-Star Level (<30 mW with HV FET) Constant-Current (CC) and Constant-Voltage(CV) with Primary-Side Regulation Eliminates Secondary-Side Feedback Component Valley Switch Operation for Highest Average Efficiency Integrated Dynamic Response Enhanceement(DRE) Function Low EMI Emissions and Common Mode Noise Cycle-by-Cycle Current Limiting = Year Code PXX = 5A0 : FAN105BM6X = 5B0 : FAN105BM6X E X = Die Run Code --- = Week Code PIN CONNECTIONS Programmable Cable Drop Compensation(CDC) with One External Resistor CS AUX GND VS GATE VDD Output Short-Circuit Protection Scondary side Rectifier Short Detection via Current Sense Protection(CSP) Integrated Constant Current Compensation for Precise CC Regulation Output Over-Voltage Protection (VSOVP) Output under-Voltage Protection (VSUVP) VDD Over-Voltage Protection (VDD OVP) Internal Thermal-Shutdown Protection (OTP) Programmable Brown-In and Brown-Out Protection Typical Applications ··· Travel Adapter for Smart Phones, Feature Phones, and Tablet PCs AC-DC Adapters for Portable Devices that Require CV/CC Control © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 1 ORDERING INFORMATION Part Number Operating Temperature Range Package Packing Method FAN105BM6X -40 ºC ~125ºC 6-Lead, SOT23 Tap & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Publication Order Number: FAN105BM6X Load Switch VBUS Bridge Lπ RSN1 + CDL1 Vac CDL2 NP CSN2 NS Co1 RStart USB Type-C Co2 GND GND TX1+ RX1+ TX1- RX1- VBUS VBUS VBUS CC1 CC1 SBU2 SR MOSFET DSN1 Fuse Depletion MOSFET DVDD RLPC1 RLPC2 MOSFET LPC GATE GND VIN Rot CVDD DR RCDC NA RVS1 AUX VDD VS RVS2 CC2 FAN105B Optocoupler RFB FAN6292B RGate Optocoupler BLD CC1 /AUX LGATE VBUS Gate CS D- D- D+ SBU1 CC2 VBUS VBUS RX2- TX2- RX2+ TX2+ GND GND CC2 VBUS CC1 Rcs GND D+ VBUS CC2 CVS Figure 1. FAN105B Typical Application Schematic VDD AUX VCS-LIM OCP S1 TDIS Internal Regulator VDD ON/OFF DRE Detection Cable Drop Compensation LEB AR Mode Protection CS OCP OTP Brown Out/In VS OVP/UVP VDD OVP Current Monitor Peak Current Detection IVS VDD VCS_CTRL VCS_PK Diode Discharge Detection TDIS VS Sample/Hold PWM Block COMI 2.5V VS DYN IO Estimator EAV GATE OSC Σ 7.5V COMV Compensator VD No-Load Control Maximum On Time GND Valley Detection Figure 2.FAN105B Function Block Diagram © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 2 Publication Order Number: FAN105BM6X PIN FUNCTION DESCRIPTION Pin # Name Description Current Sense. This pin connects to a current-sense resistor to detect the MOSFET current for Peak-Current-Mode control for output regulation. The current-sense information is also used to estimate the output current for CC regulation. 1 CS 2 GND Ground 3 GATE PWM Signal Output. This pin has an internal totem-pole output driver to drive the power MOSFET. The gate driving voltage is internally clamped at 7.5 V. 4 VDD 5 VS 6 AUX Power Supply. IC operating current and MOSFET driving current are supplied through this pin. This pin is typically connected to an external VDD capacitor. Voltage Sense. This pin detects the output voltage information and diode current discharge time based on the voltage of auxiliary winding. It also senses sink current through the auxiliary winding to detect input voltage information. Auxiliary Function. This pin generates one voltage level proportional to output current to compensate output voltage drop due to cable resistance. The pin is also used for startup with external HV FET. © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 3 Publication Order Number: FAN105BM6X ABSOLUTE MAXIMUM RATINGS (Note 1,2,3,4) Parameter Symbol Min. Max. Unit DC Supply Voltage VVDD -0.3 30 V AUX Pin Input Voltage VAUX -0.3 30 V VS Pin Input Voltage VVS -0.3 6.0 V CS Pin Input Voltage VCS -0.3 6.0 V Power Dissipation (TA=25C) PD 0.391 mW TJ -40 +150 C TSTG -60 +150 C +260 C Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 Seconds) Electrostatic Discharge Capability 1. 2. 3. 4. TL Human Body Model, ANSI/ESDA/JEDEC, JESD22_A114 Charged Device Model, JEDEC:JESD22_C101 >1.5 ESD kV >0.5 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. All voltage values, except differential voltages, are given with respect to the GND pin. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Meets JEDEC standards JS-001-2012 and JESD 22-C101. THERMAL CHARACTERISTICS (Note 5) Parameter Symbol Min. Max. Unit Junction-to-Ambient Thermal Impedance θJA 242 °C/W Junction-to-Top Thermal Impedance θJT 56 °C/W 5. TA=25°C unless otherwise specified. RECOMMENDED OPERATING RANGES (Note 6) Parameter CS Pin Input Voltage Symbol Min. Max. Unit VCS 0 0.8 V Gate Pin Input Voltage VGATE 0 8.0 V VDD Pin Input Voltage VDD 7.0 25 V VS Pin Input Voltage VVS 1.6 3.2 V AUX Pin Input Voltage VAUX 5.0 25 V 6. The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance. On Semiconductor does not recommend exceeding them or designing to Absolute Maximum Ratings. © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 4 Publication Order Number: FAN105BM6X ELECTRICAL CHARACTERISTICS VDD=12 V and TA=-40~85C unless noted Parameter Test Conditions Symbol Min Typ Max Unit Turn-On Threshold Voltage VDD-ON 16.5 17.5 18.5 V Turn-Off Threshold Voltage VDD-OFF 6.1 6.5 6.9 V VDD Over-Voltage-Protection Level VDD-OVP 26.5 28.0 29.5 V tD-VDD-OVP - 120 200 µs - 20 µA VDD Section VDD Over-Voltage-Protection Debounce Time (8) Startup Current IDD-ST Operating Current IDD-OP 1 1.4 1.7 mA IDD-DPGN 375 450 525 µA Maximum Voltage-Mode QuasiResonant Blanking Frequency fOSC-BNK-MAX 70 76 82 kHz Minimum Current-Mode Time-Out Blankig Frequency fOSC-BNK-MIN 4.5 5.0 5.5 kHz fOSC-DPGN 320 420 480 Hz fOSC-CCM-PRVENT 18 21 24 kHz Deep Green-Mode Operating Current Oscillator Section Deep Green Mode Operating (8) Frequency Minimum CCM Prevention (7) Frequency Over-Temperature Protection Section Over-Temperature Protection (7) Threshold TOTP-H 120 C Over-Temperature Protection (7) Recovery Threshold TOTP-L 100 C Continues on next page… © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 5 Publication Order Number: FAN105BM6X ELECTRICAL CHARACTERISTICS VDD=12 V and TA=-40~85C unless noted Parameter Test Conditions Symbol Min Typ Max Unit VVR 2.475 2.500 2.525 V Voltage Sampling Section Reference Voltage of Constant Voltage Feedback VS Sampling Phase-Shift Resistance (7) VS Sampling Phase-Shift (7) Capacitance VS Sampling Blanking Time of High Level Io over 100mA RVS-S/H 300 kΩ CVS-S/H 5 pF tVS_BNK-H 1.65 1.80 2.00 µs VS Sampling Blanking Time at CC Controlling tVS_BNK-CC 2.05 2.20 2.35 µs VS Discharging Time Judgment (7) Threshold Voltage VVS-Offset 150 200 250 mV ITC 9.0 10.0 11.0 μA VS Pin Source Current Threshold to Enable Brown-Out IVS-BROWN-OUT 260 310 360 μA Brown-Out De-bounce Time tD-BROWN-OUT 12 17 22 ms VS Pin Source Current Threshold to Enable Brown-In IVS-BROWN-IN 405 475 545 μA NBROWN-IN 3 4 5 cycle Output Over-Voltage-Protection of VS Sampling threshold VVS-OVP 2.70 2.80 2.90 V Output Over-Voltage-Protection Debounce Cycle Counts NVS-OVP 3 4 5 Cycle Output Low Level Under-VoltageProtection of VS Sampling threshold VVS-UVP 1.50 1.60 1.70 V Output Under-Voltage Protection Debounce Time tVS-UVP 30 40 50 ms 0.4 0.5 0.6 V 2.550 2.600 2.650 V Voltage Sense Section Temperature-Independent Bias Current Brown-In De-bounce Time No-Load Control Section Deep Green Mode Entry Threshold (7) Voltage of COMV VCOMV-CV-DPGN- Criteria to Enter Deep Green Mode VVS_EAV_Hi Deep Green Mode Band-Band Control High Threshold Voltage VVS-EAV-H 2.550 V Deep Green Mode Band-Band Control Low Threshold Voltage VVS-EAV-L 2.525 V ENTRY Criteria to Exit Deep Green Mode VVS_EAV_Lo 2.425 2.450 2.475 V Dynamic Event Trigger Threshold Voltage in Deep Green Mode VVS-EAV-DYN 2.375 2.400 2.425 V Minimum On-time at 264VAC CGATE=1nF tON-MIN-264VAC 450 500 550 ns Minimum On-time at 230VAC CGATE=1nF tON-MIN-230VAC 500 550 600 ns Minimum On-time at 115VAC CGATE=1nF tON-MIN-115VAC 1250 1350 1450 ns Minimum On-time at 90VAC CGATE=1nF tON-MIN-90VAC 1500 1650 1800 ns Continues on next page… © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 6 Publication Order Number: FAN105BM6X ELECTRICAL CHARACTERISTICS VDD=12 V and TA=-40~85C unless noted. Parameter Test Conditions Symbol Min Typ Max Unit VCCR 1.19 1.2 1.21 V Current Feedback Section Reference Voltage of Constant Current Feedback VCS Peak Value Amplifying Gain (7) Attenuator ratio of Constant Current (7) Feedback Loop APK 3.9 V/V AV-CC 1/3.5 V/V Current Sense Section Current Limit Threshold Voltage VCS-LIM 0.70 0.75 0.80 V GATE Output Turn-Off Delay (7) tPD Leading-Edge Blanking Time (7) tLEB 150 200 250 ns Maximum On-Time tON-MAX 15 17 20 μs Gate Output Voltage Low VGATE-L 0 1.5 V Internal Gate PMOS Driver ON VDD-PMOS-ON 7.0 7.5 8.0 V Internal Gate PMOS Driver OFF VDD-PMOS-OFF 9.0 9.5 10.0 V VGATE-CLAMP 7.0 7.5 8.0 V IDRE-DET 110 140 170 μA 100 ns GATE Section Gate Output Clamping Voltage VDD level higher than 9V AUX Section Dynamic Response Enhancement (DRE) function trigger threshold current at AUX CDC compensation voltage at internal reference RCDC is 330kΩ VVS-CDC4 0.298 0.320 0.343 V RCDC is 560kΩ VVS-CDC3 0.223 0.240 0.257 V RCDC is 920kΩ VVS-CDC2 0.149 0.160 0.171 V RCDC is 1.3MΩ VVS-CDC1 0.074 0.080 0.086 V Notes: 7. Guaranteed by Design. 8. TA guaranteed range at 25C © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 7 Publication Order Number: FAN105BM6X 1.06 1.009 1.04 1.006 VDD-OFF , Normalized VDD-ON , Normalized Typical Performance Characteristics 1.02 1.00 0.98 0.96 0.94 1.003 1.000 0.997 0.994 0.991 -40 -30 -15 0 25 50 75 85 100 125 -40 -30 -15 0 Tempeature (°C) Figure 4.Turn-Off Threshold Voltage (VDD-OFF) vs. Temperature 1.06 1.3 1.04 1.2 IDD-DPGN , Normalized IDD-OP , Normalized Figure 3.Turn-On Threshold Voltage (VDD-ON) vs. Temperature 1.02 1.00 0.98 0.96 1.1 1.0 0.9 0.8 0.7 0.94 -40 -30 -15 0 -40 -30 -15 0 25 50 75 85 100 125 Figure 5.Operating Supply Current (IDD-OP) vs. Temperature Figure 6.Deep Green Mode Operation Current (IDDDPGN) vs. Temperature 1.06 1.04 1.04 f OSC-DPGN , Normalized 1.06 1.02 1.00 0.98 0.96 25 50 75 85 100 125 Tempeature (°C) Tempeature (°C) f OSC-BNK-MAX , Normalized 25 50 75 85 100 125 Tempeature (°C) 1.02 1.00 0.98 0.96 0.94 0.94 -40 -30 -15 0 25 50 75 85 100 125 -40 -30 -15 0 Tempeature (°C) Figure 7.Maximum Operation Frequency of QR Blanking Time (fOSC-BNK-MAX) vs. Temperature © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 25 50 75 85 100 125 Tempeature (°C) Figure 8. Deep Green Mode Operation Frequency (fOSC-DPGN) vs. Temperature 8 Publication Order Number: FAN105BM6X 1.009 1.009 1.006 1.006 tVS-BNK-H , Normalized VDD-OFF , Normalized Typical Performance Characteristics 1.003 1.000 0.997 0.994 1.003 1.000 0.997 0.994 0.991 0.991 -40 -30 -15 0 -40 -30 -15 0 25 50 75 85 100 125 Figure 10.Vs Sampling Blanking Time (tVS-BNK-H) vs. Temperature 1.009 1.060 1.006 1.040 VVS-UVP , Normalized VVS-OVP , Normalized Figure 9.Reference Voltage of CV Feedback (VVR) vs. Temperature 1.003 1.000 0.997 0.994 1.020 1.000 0.980 0.960 0.940 0.991 -40 -30 -15 0 -40 -30 -15 0 25 50 75 85 100 125 Figure 11.Output Over-Voltage Protection of Vs sampling Threshold(VVS-OVP) vs. Temperature Figure 12.Output Under-Voltage of Vs sampling Threshold(VVS-UVP) vs. Temperature 1.06 1.006 1.04 tON-MIN-264VAC , Normalized 1.009 1.003 1.000 0.997 0.994 0.991 -40 -30 -15 0 1.02 1.00 0.98 0.96 0.94 25 50 75 85 100 125 -40 -30 -15 0 Tempeature (°C) Figure 13.Current Limit Threshold Voltage(VCS-LIM) vs. Temperature © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 25 50 75 85 100 125 Tempeature (°C) Tempeature (°C) VCS-LIM , Normalized 25 50 75 85 100 125 Tempeature (°C) Tempeature (°C) 25 50 75 85 100 125 Tempeature (°C) Figure 14.Minmum Gate Turn On time(tON-MIN-264VAC) vs. Temperature 9 Publication Order Number: FAN105BM6X FAN105BM6X 1.06 1.009 1.04 1.006 IZTC , Normalized tON-MAX , Normalized Typical Performance Characteristics 1.02 1.00 0.98 0.96 1.003 1.000 0.997 0.994 0.94 0.991 -40 -30 -15 0 25 50 75 85 100 125 -40 -30 -15 Tempeature (°C) 1.009 1.04 1.006 1.00 0.98 0.96 0.94 -40 -30 -15 0 0.997 0.994 0.991 -40 -30 -15 0 1.04 1.04 IVS-BROWN-OUT, Normalized VGATE-CLAMP , Normalized Figure 18.Brown In Threshold Current (IVS-BROWN-IN) vs. Temperature 1.06 0.98 0.96 0.94 -40 -30 -15 0 25 50 75 85 100 125 © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 1.02 1.00 0.98 0.96 0.94 -40 -30 -15 Tempeature (°C) Figure 19.Clamp Voltage (VGATE-CLAMP) vs. Temperature 25 50 75 85 100 125 Tempeature (°C) 1.06 1.00 85 100 125 1.000 Tempeature (°C) 1.02 75 1.003 25 50 75 85 100 125 Figure 17.Cable Compensation Level 4 Reference Voltage(VVS-CDC4) vs. Temperature 50 Figure 16.Dynamic trigger current threshold (IZTC) vs. Temperature 1.06 1.02 25 Tempeature (°C) IVS-BROWN-IN , Normalized VVSCDC4 , Normalized Figure 15.Maximum Gate Turn On Time (tON-MAX) vs. Temperature 0 0 25 50 75 85 100 125 Tempeature (°C) Figure 20.Brown Out Threshold Current (IVS-BROWN-OUT) vs. Temperature 10 Publication Order Number: FAN105BM6X FAN105BM6X 1.060 1.06 1.040 1.04 VDD-OVP , Normalized tVS-UVP, Normalized Typical Performance Characteristics 1.020 1.000 0.980 0.960 0.940 1.02 1.00 0.98 0.96 0.94 -40 -30 -15 0 25 50 75 85 100 125 -40 -30 -15 Tempeature (°C) Figure 21.Blanking time of VSUVP(tVS-UVP) vs. Temperature © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 0 25 50 75 85 100 125 Tempeature (°C) Figure 22.VDD Over Voltage Protection Threshold (VDD-OVP) vs. Temperature 11 Publication Order Number: FAN105BM6X FAN105BM6X When the MOSFET is turned off, the energy stored in the inductor forces the secondary diode (Dsec) to turn on. While the diode is conducting, the output voltage (V o), together with diode forward voltage drop (VF), are applied across the 2 2 secondary-side inductor (LmNs / Np ) and the diode current (ID) decreases linearly from the peak value (IpkNp/Ns) to zero. At the end of inductor current discharge time (tDIS), all the energy stored in the inductor has been delivered to the output. Functional Description FAN105B is an offline PWM and Primary-Side Regulated (PSR) fly-back controller that can simplify feedback circuit and secondary side circuit compare to traditional fly-back converter. In addition, FAN105B detects Quasi-Resonant valley switching to minimize the switching loss and get better EMI performance. When the diode current reaches zero, the transformer auxiliary winding voltage (VAux) begins to oscillate by the resonance between the primary-side inductor (Lm) and the effective capacitor loaded across MOSFET. FAN105B modulates pulse width and switching frequency based on feedback signal auxiliary winding signal (VS) and current sense signal (CS). Extremely accurately Constant Voltage(CV) with Cable Drop Compensation (CDC) and Constant Current (CC) could meet strict requirement from market. The CV and CC output characteristic is shown as Figure 23. There are 4 levels (80mV - 320mV) choices in CDC compensation weighting that is easily set via external SMD resistor. VO During the inductor current discharge time, the sum of output voltage and diode forward-voltage drop is reflected to the auxiliary winding side as (Vo+VF) NAux/Ns. Since the diode forward-voltage drop decreases as current decreases, the auxiliary winding voltage reflects the output voltage best at the end of diode conduction time, where the diode current diminishes to zero. By sampling the winding voltage at the end of the diode conduction time, the output voltage information can be obtained. The internal error amplifier for output voltage regulation (EAV) compares the sampled voltage with internal precise reference to generate error voltage (COMV), which determines the duty cycle of the MOSFET in CV Mode. Before Cable Compensation After Cable Compensation Maximum Specification Minimum Specification The output current is obtained by averaging the triangular output diode current area over a switching cycle as: IO I D AVG IO Figure 23.CV with CDC and CC V/I Curve at the Cable End 1 N T I PK P DIS 2 N S TS (1) The internal FAN105B circuits identify the peak value of the drain current with a peak detection circuit and calculate the output current using the inductor discharge time (tDIS) and switching period (tS). This output information (EAI) is compared with internal precise reference to generate error voltage (COMI), which determines the duty cycle of the MOSFET in CC Mode. With TRUECURRENT® technique, constant output current can be precisely controlled. FAN105B implements DeeP GreeN mode (DPGN) with lowest switching frequency, limites IC current consumption (450µA) for excellent system standby power performance. Furthermore, the system design allowes two kinds of startup circuit with resistor or high voltage FET. With a given current sensing resistor, the output current can be programmed as: Protections are : over/under voltage protection (VSOVP, VSUVP), Brown In and Brown Out, cycle by cycle over current protection(OCP), current sense resistor short protection, secondary rectifier short protection. (2) Basic CV/CC Control Principle Of the two error voltages, COMV and COMI, the smaller one determines the duty cycle. During Constant Voltage regulation, COMV determines the duty cycle while COMI is saturated to HIGH. During Constant Current regulation, COMI determines the duty cycle while COMV is saturated to HIGH. Figure 24 shows the circuit diagram of a PSR fly-back converter, FAN105B estimates output current through primary side peak current from CS, output voltage via auxiliary winding signal that proportional to secondary side voltage, the current and voltage sampling are shown in Figure 25. Generally, Discontinuous Conduction Mode (DCM) with valley switching operation is preferred for PSR since it allows better output regulation. The operation principles of DCM/BCM flyback converter are as follows: During the MOSFET turn on time (tON), input voltage (VDL) is applied across the primary-side inductor (Lm). Then MOSFET current (IDS) increases linearly from zero to the peak value (Ipk). Meanwhile, the energy is drawn from the input and stored in the inductor. © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 12 Publication Order Number: FAN105BM6X FAN105BM6X VDL CDL NP RSN1 NS Dsec CSN1 as EAV at timing like gray point showed. Base on EAV level to regulate Pulse width to achieve estimation output voltage. + Co Vo DSN1 GATE R Gate CC Estimator EAI COMI MOSFET RCG CS GATE RCS VCCR PWM Control Block VVR VAux CS COMV CV EAV Estimator NA VAuxiliary RVS1 VS CVS RVS2 NA V BLK NP 200mV Figure 24.Simplified PSR Flyback Converter Circuit IDS (MOSFET Drain-to-Source Current) VS (With Schottky) I PK ID (Diode Current) I PK NP NS I o I D AVG VS (With SR control) tVS-BNK-L VS (With Schottky) tON VO VF RVS 2 NA N S RVS 1 RVS 2 RVS 2 NA EAV N S RVS 1 RVS 2 tS Figure 26.VS sampling with Diode or Synchronous Rectifier TON A leading edge blanking time(tVS-BNK-H/L) start from primary switch turned off. Most of TA design have VS oscillation after primary switch turned off, that is caused by the resonance of leakage inductance and parasistic capacitance at transformer. In order to avoid VS sampling procedure get impacted by that ringing, the oscillation should be settle before settle down before tVS-BNK-L ended as Figure 26 showed. tDIS is secondary rectifier current discharging time which recommend better design is longer than tVS-BNK-H during miimum on time controlling. tDIS is predictable by following formula: TDIS TS Figure 25.Cycling Current and VS Sampling in DCM Quasi-Resonant Valley Switch FAN105B Build-In Quasi-Resonant valley detecting function and inductor discharging time detecting function. During MOSFET turn off period, FAN105B checked falling of VVS, TDIS information will update as falling of VVS checked. FAN105B keep monitor both VVS and IVS after TDIS checked. FAN105B maximum period of MOSFET on time and off time could be reach 45µs, it was depending on whether valley checked. Quasi-Resonant valley switching could minimize MOSFET switching loss during switch on, meanwhile, to eliminate EMI and Common mode switching component noise. Charger system would be getting better efficiency than non-valley switching methodology. (3) Where parameter : tOFF-DELAY is switch turn off delay time that level is chaging in differences system criteria, tON-MIN is minimum turn on time in design that should consider propagation delay from IC Gate to switch Gate. Output voltage can be describe by below equation: Output Voltage Sampling (4) VS voltage which is reflected auxiliary winding and proportional to output voltage. Therefore, It is possible to regulate output voltage by sensing VS voltage. Figure 26 shown VS sampling waveform with secondary rectifier that using Schottky diode or Synchronous Rectifier (SR). Deep Green Mode (DPGN) Operation in CV mode FAN105B integrated mWSaver® technology that minimize current consumption and frequency at DPGN mode is fixed to minimum switching frequency (fOSC-DPGN) and variable Pulse width based on VS sampling voltage (EAV). In order to regulate output voltage in accurately range, FAN105B build-in VS sampling methodology for signal like Figure 26 showed, FAN105B samples and hold VS voltage © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 tDIS 13 Publication Order Number: FAN105BM6X FAN105BM6X VVS regulated boundary are between VVS-EAV-H and VVS-EAVL. After exit DPGN, internal regulation reference voltage was changed to VVR. Programmable Brown In/ Brown Out FAN105B implement Brown out and Brown In through high side resistor setting at VS PIN. In actual system operation, VS PIN is drain a current (IVS) that proportional to line voltage during MOSFET turns on. IVS could predict by below equation: FAN105B DPGN entry and exit criteria showed as below: DPGN entry need to meet both criteria as below: Minimum frequency (fOSC-MIN) operation continues over than NDPGN-Entry switching cycles. EAV > VVS-EAV-H(2.550V). (5) Operating Current The operating current in FAN105B is as small as 1.4mA. The small operating current results in higher efficiency and reduces the VDD hold-up capacitance requirement. During DPGN mode, the FAN105B consumption current is reduced to 450µA, assisting the power supply meet standby power standard requirements. DPGN exit criteria, meet one of below criteria: EAV < VVS-EAV-L (2.525V) and maximum on time at DPGN. EAV < VVS-EAV-DYN(2.4V). During the DPGN mode controlling, FAN105B decreases the operating current down to 450µA. Therefore, the standby power could meet international standard requirement when work with flexible start up circuit, designer have flexible start up circuit that HV FET or start up resistor depending on cost and better standby power consideration Protections The FAN105B self-protection includes VDD Over-VoltageProtection (VDD OVP), Internal Chip Over-TemperatureProtection (OTP), VS Over-Voltage Protection (VSOVP), VS Under-Voltage Protection (VSUVP), CS pin Protection(CSP), Brownout and Brown In protection, and all of protection are implemented as Auto Restart(AR) mode. Cable Drop Compensation (CDC) FAN105B integrates cable drop compensation function and the compensation weighting is calculated based on tDIS, current sense voltage (VCS), and CDC setting resistor (RCDC) needed to between VDD and AUX pin. During startup, as VDD reached VDD-ON, CDC programming block detects AUX pin current and determine cable drop compensation weighting based on current weighting of AUX pin. Once finished CDC compensation weighting detecting, the information will stored until shunt-down by protections or VDD lower than VDD-OFF. The CDC weighting automatic detected input current during start up. which provides a constant output voltage at the end of the cable over the entire load range in CV Mode. The table shows the compensation weighting with corresponding RCDC setting as below: When When an Auto-Restart Mode protection is triggered, switching is terminated and the MOSFET remains off, causing VDD to drop till VDD-OFF and shut-down the system then all protections are reset. After then VDD will be charged again by the input AC voltage and once touch V DD-ON then switching resumes. This is the reason why it is called AutoRestart, resumes switching automatically. VDD Over-Voltage-Protection(VDD OVP) When VDD is raised up to higher level by some reasons, transformer VDD winding turns are too many, load regulation is not good between transformer winding, VS information is not available anyhow and so on, and touches VDD-OVP, then FAN105B stops switching and protects IC from higher VDD voltage. This is different then output voltage is over than pre determined level. CDC Weighting and RCDC Setting RCDC Label VVS Compensation weighting 1.3MΩ VVS-CDC1 0.08V 920kΩ VVS-CDC2 0.16V 560kΩ VVS-CDC3 0.24V 330kΩ VVS-CDC4 0.32V VS Under-Voltage Protection (VSUVP) FAN105B bulid-in VSUVP function that prevent TA keep deliver power to phone side when output voltage is under the set voltage at VS pin. VSUVP has a 40ms de-bounce time and once VDD touches VDD-ON, during the later 40ms VSUVP is disabled because VSUVP should not be triggered during the start up. VSUVP level can be calculated as below: (6) TA designer can easily to set up CDC weighting via choose RCDC following above table. In the table, resisance of RCDC is recommended for corresponding compensation level. Cable drop compensation voltage at output is proportional to VVS compensation weighting that is internal referce voltage for CDC compensation. © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 VS Over-Voltage Protection (VSOVP) The VSOVP is designed to prevent TA output voltage is over then the rating of used components, like capacitor. VSOVP has 4 switching cycles of denounce time and that prevent mis-triggered of VSOVP by switching noise. The protection level is changed in proportional to the CDC 14 Publication Order Number: FAN105BM6X FAN105BM6X weighting.VSOVP trigger level can be illustrates as following formula : VDD VDD-OVP VDD-ON (7) VDD-OFF CS pin Protection(CSP) In order to prevent MOSFET current over than safe operating area, FAN105B build-in cycle by cycle over current protection. The protection could protect MOSFET damaged by saturation current and CS pin sensing error. As CS PIN signal meet below conditions FAN105B will turn off Gate immediately. Current Sensing Protection (CSP) criteria shows as below: VCS <0.2V after switching turn on 4.5us at low line or 1.5us at high line. VCS>1.5V VGATE,S1 VDD-VAUX VAUX-CL Figure 28. Start Up Sequence With AUX Controlling Dynamic Response Enhancement (DRE) With AUX Over-Temperature Protection(OTP) In order to guarantee FAN105B works within recommended temperature. FAN105B build-in chip Over-Temperature – Protection (OTP). As chip junction temperature over thareshold TOTP-H IC immediately terminated Gate switching signal untill chip junction termperature recover to TOTP-L. PSR flyback converter regulates output voltage within requirement specification through detects VS signal which proportional to output voltage, However VS signal can only detects when system switched. In order to get better standby power performance, the switching frequency is decreases to quite low frequency, it can not maintaining out voltage as load suddenly increases from extremely light load to heavy load during minimum frequency operation. Therefore, FAN105B build in a Dynamic Response Enhancement (DRE) function to detects output voltage dropping immediately when FAN105B pair with FAN6292B. Figure 29 shows DRE function block. Figure 30 shows DRE function relative signal working sequence. When output voltage undershoot is acknowledged via FAN6292B VIN pin, BLD/AUX pin pull-down current via S2 switch to inform undershoot to FAN105B via a photo-coupler. Once FAN105B sensed AUX current higher than IDRE-DET, the switching frequency is increases immediately. Start Up Function With AUX FAN105B supports high voltage start up with HV FET that can make better standby power and shorter start up time. Figure 27 shows start up controlling function block. Figure 28 shows start up relative signal sequence with AUX controlling. At system power on moment, initial VDD voltage is zero, internal PMOS switch is turn on and external HV FET also turn on, CVDD is charged through HV FET till VDD reach VDD-ON. While Internal PMOS switch S1 turn off and VGS of HV FET will close to internal clamping voltage (VAUX-CL) which less than HV FET VGS turn on threshold. Meanwhile VDD energy supplement is turn to auxiliary winding. The voltage gap between VDD and VAUX is keep at 5V till controller shut-down by protection or VDD touching VDD-OFF. VBUS NP NS Co1 Co2 LGATE SR Gate VDD RAUX VDL RStart AUX FAN105B VAUX-CL VO Drop Detection RCDC No Load Control TDIS TON VDD Optocoupler ROPTO(3.3kΩ) Leave Bang-Bang Control IAUX AUX BLD / AUX S1 VIN FAN6292B ± R CVDD ± 1V VDD-ON/ VDD-OFF S2 Pulse VIN-AUX Figure 29. Internal function for Start Up of AUX PIN Figure 27. Internal function for Start Up of AUX PIN © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 15 Publication Order Number: FAN105BM6X FAN105BM6X VGATE (FAN105B) IO Accurately Constant Compensation Heavy Load (CC) FAN105B provides accurate constant current with universal line voltage range, In order to achieve this accurately output current regulated, FAN105B build in circuits that compensate a DC level at CS signal based on difference line voltage. It could avoid output current gap of difference line voltage during constand current controlling. For noise immunity, the recommendation of CS pin series resistor is 10Ω. VBUS VIN-AUX S2 tAUX-ON IAUX Current tOPTO-DELAY IDRE-DET Figure 30.DRE function Detecting Sequency © Semiconductor Components Industries, LLC, 2017 May 2017- Rev. 1.0 16 Publication Order Number: FAN105BM6X REVISIONS LTR A C 2 D 0.15 C A-B DESCRIPTION E.C.N. RELEASE TO DOCUMENT CONTROL 2X DATE 11/4/2006 5 JULY 07 DWG UPDATED TO CONFORM TO MO178 BY/APP'D H.ALLEN L.HUEBENER SYMM C L 2.9 (0.95) 1.9 (0.95) D A (1.00MIN) 1.4 C D 1.6 2.8 (2.60) (0.70MIN) 0.15 C D 2X 0.15 C PIN 1 INDEX AREA 2X 3 TIPS 0.95 B (1.90) 2X 0.3-0.5 0.20 C A-B D LAND PATTERN RECOMMENDATION SEE DETAIL A 1.45 MAX 1.30 0.90 0.08 0.22 C 0.15 0.05 6X 0.10 C R0.10MIN GAGE PLANE R0.10MIN 0.25 8° 0° 0.60 0.30 SEATING PLANE 0.60 REF DETAIL A NOTES: A. THIS PACKAGE CONFORMS TO JEDEC MO-178, VARIATION AB. B. ALL DIMENSIONS ARE IN MILLIMETERS. C. DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. D. DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. E. DIMENSIONS AND TOLERANCING AS PER ASME Y14.5M-1994 F. DRAWING FILE NAME: MA06EREV2 SCALE: 2:1 APPROVALS DATE L.HUEBENER 5 JULY 07 H.ALLEN 17 JULY 07 6LD,SOT23,JEDEC MO-178 VARIATION AB, 1.6MM WIDE 1:1 FORMERLY: / NA N/A MKT-MA06E SHEET : 2 1 OF 1 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. 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