FSQ0370RNA, FSQ0370RLA Green Mode Fairchild Power Switch (FPS™) Features Description The FSQ0370 consists of an integrated Current Mode Pulse Width Modulator (PWM) and an avalanche rugged 700V SenseFET. It is specifically designed for highperformance offline Switched Mode Power Supplies (SMPS) with minimal external components. The integrated PWM controller features include: a fixedfrequency generating oscillator, Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), an optimized gate turn-on / turn-off driver, Thermal Shutdown (TSD) protection, and temperaturecompensated precision current sources for loop compensation and fault protection circuitry. Internal Avalanche Rugged 700V SenseFET Consumes Only 0.8W at 230VAC & 0.5W Load with Burst-Mode Operation Precision Fixed Operating Frequency: 100kHz Under-Voltage Lockout (UVLO) Internal Startup Circuit and Built-in Soft-Start Pulse-by-Pulse Current Limiting, Auto-Restart Mode Over-Voltage Protection (OVP), Overload Protection (OLP), Internal Thermal Shutdown Function (TSD) Low Operating Current: 3mA Adjustable Peak Current Limit Applications Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ0370 reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for the design of cost-effective flyback converters, such as in PC auxiliary power supplies. Auxiliary Power Supply for PC and Server SMPS for VCR, SVR, STB, DVD, and DVCD Player Printer, Facsimile, and Scanner Adapter for Camcorder Related Application Notes AN-4134 — Design Guidelines for Off-line Forward Converters Using Fairchild Power Switch (FPS™) AN-4137 — Design Guidelines for Offline Flyback Converters Using Fairchild Power Switch (FPS™) AN-4141 — Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications AN-4147 — Design Guidelines for RCD Snubber of Flyback Converters Ordering Information Part Number Package FSQ0370RNA 8-Lead, Dual Inline Package (DIP) FSQ0370RLA 8-Lead, LSOP © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 Marking Code BVDSS fOSC RDS(ON)(MAX) Q0370RA 700V 100KHz 4.75Ω www.fairchildsemi.com FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) March 2012 AC IN DC OUT Vstr Ipk Drain PWM Vfb Vcc Source Figure 1. Typical Flyback Application Table 1. Output Power Table(1) Product 230VAC ±15%(2) 85-265VAC Adapter(3) Open Frame(4) Adapter(3) Open Frame(4) 20W 27W 13W 19W FSQ0370RNA FSQ0370RLA Notes: 1. The maximum output power can be limited by junction temperature. 2. 230VAC or 100/115VAC with doubler. 3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sink at 50°C ambient. 4. Maximum practical continuous power in an open-frame design with sufficient drain pattern as a heat sink at 50°C ambient. Internal Block Diagram Figure 2. Functional Block Diagram © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 2 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Application Circuit Figure 3. Pin Configuration (Top View) Pin Definitions Pin# Name 1 GND SenseFET source terminal on the primary side and internal control ground. Vcc Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from pin 5 (Vstr) via an internal switch during startup (see Figure 2). It is not until VCC reaches the UVLO upper threshold (12V) that the internal startup switch opens and device power is supplied via the auxiliary transformer winding. Vfb The feedback voltage pin is the non-inverting input to the PWM comparator. It has a 0.9mA current source connected internally, while a capacitor and optocoupler are typically connected externally. A feedback voltage of 6V triggers overload protection (OLP). There is a delay while charging external capacitor Cfb from 3V to 6V using an internal 5µA current source. This delay prevents false triggering under transient conditions, but allows the protection mechanism to operate in true overload conditions. 4 Ipk This pin adjusts the peak current limit of the SenseFET. The 0.9mA feedback current source is diverted to the parallel combination of an internal 2.8kΩ resistor and any external resistor to GND on this pin. This determines the peak current limit. If this pin is tied to Vcc or left floating, the typical peak current limit is 1.1A. 5 Vstr This pin is connected to the rectified AC line voltage source. At startup, the internal switch supplies internal bias and charges an external storage capacitor placed between the Vcc pin and ground. Once VCC reaches 12V, the internal switch is opened. 6, 7, 8 Drain The drain pins are designed to connect directly to the primary lead of the transformer and are capable of switching a maximum of 700V. Minimizing the length of the trace connecting these pins to the transformer decreases leakage inductance. 2 3 Description © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 3 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Pin Assignments Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and 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. TA=25°C, unless otherwise specified. Symbol VDRAIN VSTR IDM Parameter Min. Max. Unit Drain Pin Voltage 700 V Vstr Pin Voltage 700 V (5) Drain Current Pulsed (6) 12 A EAS Single Pulsed Avalanche Energy 230 mJ VCC Supply Voltage 20 V VFB Feedback Voltage Range VCC V PD Total Power Dissipation 1.5 W TJ Recommended Operating Junction Temperature -40 Internally Limited °C TA Operating Ambient Temperature -40 +85 °C Storage Temperature -55 +150 °C Value Unit TSTG -0.3 Notes: 5. Non-repetitive rating: pulse-width limited by maximum junction temperature. 6. L=51mH, starting TJ=25°C. Thermal Impedance Symbol Parameter (7) θJA Junction-to-Ambient Thermal Resistance 80 θJC Junction-to-Case Thermal Resistance(8) 20 ΨJT Junction-to-Top Thermal Resistance(9) 35 °C/W Notes: 7. Free-standing with no heat-sink, without copper clad. 8. Measured on the drain pin, close to the plastic interface. 9. Measured on the package top surface. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 4 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Absolute Maximum Ratings T A=25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit (10) SenseFET Section IDSS Zero-Gate-Voltage Drain Current VDS=700V, VGS=0V 50 VDS=560V, VGS=0V, TC=125°C 200 µA Drain-Source On-State Resistance(10) VGS=10V, ID=0.5A 4.00 CISS Input Capacitance VGS=0V, VDS=25V, f=1MHz 315 pF COSS Output Capacitance VGS=0V, VDS=25V, f=1MHz 47 pF CRSS Reverse Transfer Capacitance VGS=0V, VDS=25V, f=1MHz 9 pF td(on) Turn-On Delay VDD=350V, ID=1A 11.2 ns Rise Time VDD=350V, ID=1A 34 ns Turn-Off Delay VDD=350V, ID=1A 28.2 ns Fall Time VDD=350V, ID=1A 32 ns RDS(ON) tr td(off) tf 4.75 Ω Control Section fOSC Switching Frequency (11) ΔfOSC Switching Frequency Variation -25°C < TJ < 85°C DMAX Maximum Duty Cycle Measured at 0.1 x VDS DMIN Minimum Duty Cycle VSTART UVLO Threshold Voltage VFB=GND IFB Feedback Source Current VFB=GND tS/S (11) VSTOP Internal Soft-Start Time 92 100 108 ±5 ±10 % 55 60 650 % 0 0 0 % 11 12 13 7 8 9 0.7 0.9 1.1 10 VFB=4V kHZ V mA ms Burst-Mode Section VBURH VBURL TJ=25°C Burst-Mode Voltage VBUR(HYS) 0.5 0.6 07 V 0.3 0.4 0.5 V 100 200 300 mV 0.97 1.10 1.23 A Protection Section ILIM tCLD TSD Peak Current Limit di/dt=240mA/µs (11) Current Limit Delay Thermal Shutdown Temperature (11) 500 ns 125 140 °C VSD Shutdown Feedback Voltage 5.5 6.0 VOVP Over-Voltage Protection 18 19 IDELAY Shutdown Delay Current 3.5 5.0 tLEB VFB=4V (11) Leading-Edge Blanking Time 6.5 V V 6.5 200 µA ns Total Device Section IOP Operating Supply Current (Control Part Only) VCC=14V 1 3 5 mA ICH Startup Charging Current VCC=0V 0.70 0.85 1.00 mA VSTR Supply Voltage VCC=0V VSTR 24 V Notes: 10. Pulse test: Pulse width ≤ 300μs, duty ≤ 2%. 11. These parameters, although guaranteed, are not 100% tested in production. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 5 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Electrical Characteristics Characteristic graphs are normalized at TA=25°C. Figure 4. Operating Frequency (fOSC) vs. TA Figure 5. Over-Voltage Protection (VOVP) vs. TA Figure 6. Maximum Duty Cycle (DMAX) vs. TA Figure 7. Operating Supply Current (IOP) vs. TA Figure 8. Start Threshold Voltage (VSTART) vs. TA Figure 9. Stop Threshold Voltage(VSTOP) vs. TA © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 6 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics Characteristic graphs are normalized at TA=25°C. Figure 10. Feedback Source Current (IFB) vs. TA Figure 11. Startup Charging Current (ICH) vs. TA Figure 12. Peak Current Limit (ILIM) vs. TA © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 7 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Typical Performance Characteristics 1. Startup: In previous generations of Fairchild Power Switches (FPS™), the Vstr pin required an external resistor to the DC input voltage line. In this generation, the startup resistor is replaced by an internal highvoltage current source and a switch that shuts off 10ms after the VCC supply voltage goes above 12V. The source turns back on if VCC drops below 8V. VIN,dc ISTR Vstr VCC<8V UVLO on VCC J-FET ICH 10ms after VCC≥12V UVLO off Figure 13. Startup Circuit 2. Feedback Control: The 700V FPS series employs Current Mode control, as shown in Figure 14. An optocoupler (such as the H11A817A) and shunt regulator (such as the KA431) are typically used to implement the feedback network. Comparing the feedback voltage with the voltage across the Rsense resistor of SenseFET, plus an offset voltage, makes it possible to control the switching duty cycle. When the regulator reference pin voltage exceeds the internal reference voltage of 2.5V; the optocoupler LED current increases, feedback voltage Vfb is pulled down, and the duty cycle is reduced. This typically occurs when the input voltage increases or the output load decreases. VCC VCC 5µA 0.9mA Vfb VO 3 CFB OSC + VFB D1 D2 2.5R V Gate Driver FB,in - R 4. Protection Circuits: The FPS protective functions include Overload Protection (OLP), Over-Voltage Protection (OVP), Under-Voltage Lockout (UVLO), and Thermal Shutdown (TSD). Because these protection circuits are fully integrated inside the IC without external components, reliability is improved without increasing cost. Once a fault condition occurs, switching is terminated and the SenseFET remains off. This causes VCC to fall. When VCC reaches the UVLO stop voltage, VSTOP (typically 8V); the protection is reset and the internal high-voltage current source charges the VCC capacitor via the Vstr pin. When VCC reaches the UVLO start voltage, VSTART (typically 12V); the FPS resumes normal operation. In this manner, the auto-restart can alternately enable and disable the switching of the power SenseFET until the fault condition is eliminated. 4.1 Overload Protection (OLP): Overload is defined as the load current exceeding a pre-set level due to an unexpected event. In this situation, the protection circuit should be activated to protect the SMPS. However, even when the SMPS is operating normally, the Overload Protection (OLP) circuit can be activated during the load transition. To avoid this undesired operation, the OLP circuit is designed to be activated after a specified time to determine whether it is a transient situation or a true overload situation. In conjunction with the Ipk current limit pin (if used), the Current Mode feedback path would limit the current in the SenseFET when the maximum PWM duty cycle is attained. If the output consumes more than this maximum power, the output voltage (VO) decreases below its nominal voltage. This reduces the current through the optocoupler LED, which also reduces the optocoupler transistor current, thus increasing the feedback voltage (VFB). If VFB exceeds 3V, the feedback input diode is blocked and the 5µA current source (IDELAY) starts to slowly charge Cfb up to VCC. In this condition, VFB increases until it reaches 6V, when the switching operation is terminated (as shown in Figure 15). The shutdown delay s the time required to charge Cfb from 3V to 6V with 5µA current source. VFB 431 Overload Protection VSD OLP Figure 14. Pulse Width Modulation (PWM) Circuit 3. Leading-Edge Blanking (LEB): When the internal SenseFET is turned on; the primary-side capacitance and secondary-side rectifier diode reverse recovery typically cause a high current spike through the SenseFET. Excessive voltage across the Rsense resistor leads to incorrect feedback operation in the Current Mode PWM control. To counter this effect, the FPS employs a Leading-Edge Blanking (LEB) circuit to inhibit the PWM comparator for a short time (tLEB) after the SenseFET is turned on. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 6V 3V t12= CFB ×(V(t2)-V(t1)) / IDELAY t1 t12 = C FB t2 t V (t2 ) − V (t1 ) ; I DELAY = 5μA, V (t1 ) = 3V , V (t 2 ) = 6V I DELAY Figure 15. Overload Protection (OLP) www.fairchildsemi.com 8 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Functional Description 4.3 Over-Voltage Protection (OVP): In the event of a malfunction in the secondary-side feedback circuit or an open feedback loop caused by a soldering defect, the current through the optocoupler transistor becomes almost zero (refer to Figure 14). Then, VFB climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection is activated. Because excess energy is provided to the output, the output voltage may exceed the rated voltage before the overload protection is activated, resulting in the breakdown of the devices in the secondary side. To prevent this situation, an Over-Voltage Protection (OVP) circuit is employed. In general, VCC is proportional to the output voltage and the FPS uses VCC instead of directly monitoring the output voltage. If VCC exceeds 19V, the OVP circuit is activated, terminating switching. To avoid undesired activation of OVP during normal operation, VCC should be designed to be below 19V. 5. Soft-Start: The FPS internal soft-start circuit slowly increases the SenseFET current after startup, as shown in Figure 16. The typical soft-start time is 10ms, where progressive increments of the SenseFET current are allowed during the startup phase. The pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, inductors, and capacitors. The voltage on the output capacitors is progressively increased to smoothly establish the required output voltage. This helps to prevent transformer saturation and reduces the stress on the secondary diode during startup. 6. Burst Operation: To minimize power dissipation in Standby Mode, the FPS enters Burst Mode. Feedback voltage decreases as the load decreases and, as shown in Figure 17, the device automatically enters Burst Mode when the feedback voltage drops below VBURH (typically 600mV). Switching continues until the feedback voltage drops below VBURL (typically 400mV). At this point, switching stops and the output voltage starts to drop at a rate dependent on the standby current load. This causes the feedback voltage to rise. Once it passes VBURH, switching resumes. The feedback voltage then falls and the process is repeated. Burst Mode alternately enables and disables switching of the SenseFET and reduces switching loss in Standby Mode. Normal Operation VFB VBURH VBURL Current Waveform Switching OFF Switching OFF Figure 17. Burst Operation Function 7. Adjusting Peak Current Limit: As shown in Figure 18, a combined 2.8kΩ internal resistance is connected to the non-inverting lead on the PWM comparator. An external resistance of Rx on the current limit pin forms a parallel resistance with the 2.8kΩ when the internal diodes are biased by the main current source of 900µA. VCC VCC 900µA 5µA IDELAY Vfb #6,7,8 5V Burst Operation Burst Operation IFB 2kΩ PWM Comparator 3 DRAIN 0.8kΩ Ip 4 SenseFET Current Sense Rx #1 Figure 18. Peak Current Limit Adjustment GND ILIM Rsense Figure 16. Soft-Start Function For example, FSQ0370 has a typical SenseFET peak current limit (ILIM) of 1.1A. ILIM can be adjusted to 0.6A by inserting Rx between the Ipk pin and the ground. The value of the Rx can be estimated by: 1.1A: 0.6A = 2.8kΩ: XkΩ, (1) X = Rx || 2.8kΩ. (2) where X represents the resistance of the parallel network. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 9 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) 4.2 Thermal Shutdown (TSD): The SenseFET and the control IC are integrated, making it easier for the control IC to detect the temperature of the SenseFET. If the temperature exceeds approximately 140°C, thermal shutdown is activated. Reducing Audible Noise Switching mode power converters have electronic and magnetic components that generate audible noises when the operating frequency is in the range of 20~20,000Hz. Even though they operate above 20KHz, they can crease noise, depending on the load condition. Three methods of reducing noise are discussed below: Glue or Varnish The most common method of reducing audible noise includes using glue or varnish to tighten magnetic components. The motion of core, bobbin, and coil as well as the chattering or magnetostriction of core can cause the transformer to produce audible noise. The use of rigid glue and varnish reduces the transformer noise. Glue or varnish can also crack the core because sudden changes in the ambient temperature cause the core and the glue to expand or shrink in a different ratio according to the temperature. Figure 19. Equal Loudness Curves Ceramic Capacitor Using a film capacitor instead of a ceramic capacitor as a snubber capacitor is another noise reduction solution. Some dielectric materials show a piezoelectric effect, depending on the electric field intensity. A snubber capacitor can become one of the most significant sources of audible noise. Another possibility is to use a Zener clamp circuit instead of an RCD snubber for higher efficiency as well as lower audible noise. Adjusting Sound Frequency Moving the fundamental frequency of noise out of 2~4KHz range is a third method. Generally, humans are more sensitive to noise in the range of 2~4KHz. When the fundamental frequency of noise is located in this range, the noise sounds louder though the noise intensity level is identical. Refer to Figure 19. If Burst Mode is suspected as a source of noise, this method may be helpful. If the frequency of Burst Mode operation lies in the range of 2~4KHz, adjusting the feedback loop can shift the burst operation frequency. To reduce burst operation frequency, increase a feedback gain capacitor (CF), optocoupler supply resistor (RD), and feedback capacitor (CB) and decrease a feedback gain resistor (RF) as shown in Figure 20. Figure 20. Typical Feedback Network of FPS™ Reference Materials AN-4134 — Design Guidelines for Offline Forward Converters Using Fairchild Power Switch (FPS™) AN-4137 — Design Guidelines for Offline Flyback Converters Using Fairchild Power Switch (FPS™) AN-4140 — Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS™) AN-4141 — Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications AN-4147 — Design Guidelines for RCD Snubber of Flyback Converters AN-4148 — Audible Noise Reduction Techniques for FPS Applications © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 10 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Application Information Application Output Power Input Voltage Output Voltage (Maximum Current) PC Auxiliary Power Supply (Using FSQ0270RNA) 15W Universal Input (85-264VAC) 5V (3A) Features Key Design Notes High efficiency (>78% at 115VAC and 230VAC input) The delay for overload protection is designed to be about 30ms with C8 of 47nF. If faster/slower triggering of OLP is required, C8 can be changed to a smaller or larger value (eg. 100nF for 60ms). Enhanced system reliability through various protection functions Low EMI through frequency modulation ZP1, DL1, RL1, RL2, RL3, RL4, RL5, RL7, QL1, QL2, and CL9 build a line Under-Voltage Lockout block (UVLO). The Zener voltage of ZP1 determines the input voltage that turns the FPS on. RL5 and DL1 provide a reference voltage from VCC. If the input voltage divided by RL1, RL2, and RL4 is lower than the Zener voltage of DL1; QL1, and QL2 turn on and pull Vfb down to ground. An evaluation board and corresponding test report can be provided. Contact a Fairchild representative. Low Standby Mode power consumption (<0.8W at 230VAC input and 0.5W load) Internal soft-start: 10ms Line UVLO function can be achieved using external components © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 11 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Typical Application Circuit FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Schematic Figure 21. Demonstration Circuit © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 12 EE2229 1 Np/2 Np/2 Na 9, 10 2 3 6, 7 N5V 4 5 Figure 22. Transformer Schematic Diagram Table 2. Winding Specification No. Pin (s→f) Wire Turns Winding Method Np/2 3→2 0.3φ x 1 72 Solenoid Winding 22 Solenoid Winding 8 Solenoid Winding 72 Solenoid Winding Insulation: Polyester Tape t = 0.025mm, 1-Layer 0.25φ x 2 4→5 Na Insulation: Polyester Tape t = 0.0250mm, 2-Layer N5V 0.65φ x 2 6, 7 → 9, 10 Insulation: Polyester Tape t = 0.025mm, 2-Layer 0.3φ x 1 2→1 Np/2 Insulation: Polyester Tape t = 0.025mm, 2-Layer Table 3. Electrical Characteristics Pin Specification Remarks Inductance 1-3 1.20mH ± 5% 100kHz, 1V Leakage 1-3 <30µH Maximum Short All Other Pins Core & Bobbin Core: EER2229 ( PL-7, 37.2mm2) Bobbin: BE2229 © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 13 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Transformer Demonstration Board Part List Part Number Value Quantity Description (Manufacturer) C6, C8 47nF 2 Ceramic Capacitor C1 2.2nF (1KV) 1 AC Ceramic Capacitor(X1 & Y1) C10 1nF (200V) 1 Mylar Capacitor CS1 1.5nF (50V) 1 SMD Ceramic Capacitor 2 Low Impedance Electrolytic Capacitor KMX series (Samyoung Electronics) C2, C3 22µF (400V) C4, C9 1000µF (16V) 2 Low ESR Electrolytic Capacitor NXC series (Samyoung Electronics) C5 470µF (10V) 1 Low ESR Electrolytic Capacitor NXC series (Samyoung Electronics) C7 47µF (25V) 1 General Electrolytic Capacitor CL9 10µF (50V) 1 General Electrolytic Capacitor L1 330µH 1 Inductor L2 1µH 1 Inductor R6 2.4 (1W) 1 Fusible Resistor J1, J2, J4, L3 0 4 Jumper R2 4.7kΩ 1 Resistor R3 560Ω 1 Resistor R4 100Ω 1 Resistor R5 1.25kΩ 1 Resistor R11 1.2kΩ 1 Resistor R9 10kΩ 1 Resistor R10 2Ω 1 Resistor R14 30Ω 1 Resistor RL3 1kΩ 1 Resistor RL1, RL2 1MΩ 2 Resistor RL4 120kΩ 1 Resistor RL5 30kΩ 1 Resistor RL7 40kΩ 1 Resistor RS1 9Ω 1 Resistor ZR1 80Ω 1 SMD Resistor U1 FOD817A 1 IC (Fairchild Semiconductor) U2 TL431 1 IC (Fairchild Semiconductor) U3 FSQ0270RNA 1 IC (Fairchild Semiconductor) QL1 2N2907 1 IC (Fairchild Semiconductor) QL2 2N2222 1 IC (Fairchild Semiconductor) D2, D3, D4, D5, D6, DS1 1N4007 6 Diode (Fairchild Semiconductor) D1 SB540 1 Schottky Diode (Fairchild Semiconductor) ZD1 1N4745 1 Zener Diode (Fairchild Semiconductor) DL1 1N5233 1 Zener Diode (Fairchild Semiconductor) ZP1 82V (1W) 1 Zener Diode (Fairchild Semiconductor) ZDS1 P6KE180A 1 TVS (Fairchild Semiconductor) © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 14 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Table 4. FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Layout Figure 23. Top Image of PCB Figure 24. Bottom of Image of PCB © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 15 [ .400 10.15 .373 9.46 A ] .036 [0.9 TYP] (.092) [Ø2.337] (.032) [R0.813] PIN #1 .250±.005 [6.35±0.13] PIN #1 B TOP VIEW OPTION 1 TOP VIEW OPTION 2 [ ] .070 1.78 .045 1.14 .310±.010 [7.87±0.25] .130±.005 [3.3±0.13] .210 MAX [5.33] 7° TYP 7° TYP C [ ] .021 0.53 .015 0.37 .001[.025] C .015 MIN [0.38] .140 3.55 .125 3.17 .300 [7.62] [ ] .100 [2.54] .430 MAX [10.92] NOTES: .060 MAX [1.52] A. CONFORMS TO JEDEC REGISTRATION MS-001, VARIATIONS BA B. CONTROLING DIMENSIONS ARE IN INCHES REFERENCE DIMENSIONS ARE IN MILLIMETERS C. DOES NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCHES OR 0.25MM. D. DOES NOT INCLUDE DAMBAR PROTRUSIONS. DAMBAR PROTRUSIONS SHALL NOT EXCEED .010 INCHES OR 0.25MM. E. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994. [ +0.127 .010+.005 -.000 0.254-0.000 ] N08EREVG Figure 25. 8-Lead, Dual Inline Package (DIP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 16 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Package Dimensions FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) Package Dimensions (Continued) MKT-MLSOP08ArevA Figure 26. 8-Lead, MLSOP Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 17 FSQ0370RNA / FSQ0370RLA — Green Mode Fairchild Power Switch (FPS™) © 2011 Fairchild Semiconductor Corporation FSQ0370RNA / FSQ0370RLA • Rev. 1.0.2 www.fairchildsemi.com 18