Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild_questions@onsemi.com. ON Semiconductor and the ON Semiconductor logo 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. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

F A N 7 6 December 2013 0 1 B — G r e e n C FAN7601B u r r Green Current Mode PWM Controller e n t M o d e Features Description P W  Green Current Mode PWM Control The FAN7601B is a programmable frequency green M  Low Operating Current: Maximum 4 mA current mode PWM controller. It is specially designed for C  Burst Mode Operation the offline adapter applications and the auxiliary power o n  Internal High-Voltage Startup Switch supplies that require high efficiency at light load and no tr  Under-Voltage Lockout (UVLO): 12 V / 8 V load. The internal high-voltage startup switch and burst ol l  Latch Protection and Soft-Start Function mode reduce the power loss. er  Over-Voltage Protection: 19 V FAN7601B includes protections, such as latch protection  Operating Frequency up to 300 kHz and over-voltage protection. The latch protection can be  Maximum Duty Cycle: 95% used for over-voltage protection, thermal protection, and others. The soft-start prevents the output voltage Applications overshoot at startup.  Offline Adapter Applications  Auxiliary Power Supplies Related Resources  AN4129 — Green Current Mode PWM Controller FAN7601 Ordering Information Part Number Operating Junction Temperature Top Mark Package Packing Method FAN7601BMX -40C to +150C 7601B 8-SOP Tape & Reel © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev. 1.0.4

F A Block Diagram N 7 6 V V 0 REF STR 1 8 1 B — 7 V CC G Enable OVP  5V Ref SCtiarcrtuuipt  19V ree n Rt/Ct 4 OSC C UVLO  u VREF  12V/8V rr e n 12µA t M S Q o Latch/SS3 1.5V R 6 OUT de OVP P W  S Q M  R Delay  C 2.5V Circuit  o n  Reset 2 CS/FB tr Circuit 0.97V/0.9V o  Startup ll 1V e Circuit  r  Latch/SS GND 5  1V Figure 1. Internal Block Diagram Pin Configuration VREF VCC Out GND 8 7 6 5 7601B 1 2 3 4 VSTR CS/FB Latch/SS Rt/Ct Figure 2. Pin Assignments (Top View) Pin Definitions Pin # (8-Pin) Name Description 1 V Startup STR 2 CS/FB Current Sense and Feedback 3 Latch/SS Latch Protection and Soft-Start 4 Rt/Ct Oscillator Timing 5 GND Ground 6 Out Gate Drive Output 7 V IC Power Supply CC 8 V Voltage Reference REF © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev.1.0.4 2

F A Absolute Maximum Ratings N 7 6 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be 0 1 operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In B addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The — absolute maximum ratings are stress ratings only. G Symbol Parameter Min. Max. Unit r e e V Supply Voltage 20 V n CC C V Input Voltage CS/FB -0.3 20.0 V CS/FB u r TSTG Storage Temperature -55 +150 C re n T Recommended Operating Junction Temperature -40 +150 C J t M I Output Current 250 mA O o V V Input Voltage 500 V d STR STR e Electrostatic Discharge Human Body Model, JESD22-A114 2000 P ESD V W Capability Charged Device Model, JESD22-C101 1500 M C o n t r o Thermal Impedance l l e r Symbol Parameter Value Unit  Thermal Resistance, Junction-to-Ambient 180 °C/W JA © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev.1.0.4 3

F A Electrical Characteristics N 7 6 T =-25C~125C, V =14 V, R =9.5 k, C =2.2 nF unless otherwise specified. 0 A CC T T 1 B Symbol Parameter Conditions Min. Typ. Max. Unit — Reference Section G V Reference Output Voltage I =1 mA 4.85 5.00 5.15 V r REF O e e VREF1 Line Regulation VCC=10 V~18 V 10 20 mV n V Load Regulation I =1 mA ~ 10 mA 20 30 mV C REF2 O u Oscillator Section rr e f Initial Accuracy 90 100 110 kHz n OSC t ST Voltage Stability V =10 V~18 V 1.0 1.5 % M V CC o VOSC Amplitude Vpin4 peak-to-peak 1.25 V d e PWM Section P W V CS/FB Threshold Voltage1 0.9 1.0 1.1 V CS/FB1 M D Maximum Duty Cycle T =25°C 92 95 98 % MAX A C D Minimum Duty Cycle 0 % o MIN n Burst Mode Section t r o VCS/FB2 CS/FB Threshold Voltage2(1) 0.77 0.97 1.17 V ll e V CS/FB Threshold Voltage3(1) 0.7 0.9 1.1 V r CS/FB3 Soft-Start Section I Soft-Start Current V =GND 9 12 15 A SS pin3 V Soft-Start Limit Voltage(2) I =1 A 1.2 1.5 1.8 V SL SS Protection Section V Latch Voltage 2.25 2.50 2.75 V LATCH V Over-Voltage Protection 18 19 20 V OVP UVLO Section V Start Threshold Voltage 11 12 13 V tH V Minimum Operating Voltage 7 8 9 V tL Total Current Section I Operating Supply Current 3 4 mA OP Output Section V Low Output Voltage T =25C, I =100 mA 2.0 2.5 V OL A O V High Output Voltage T =25C, I =-100 mA 11.5 12.0 14.0 V OH A O t Rising Time(1) T =25C, C=1 nF 45 150 ns r A I t Falling Time(1) T =25C, C=1 nF 35 150 ns f A I Startup Section I V Startup Current V =30V, T =25°C 0.5 1.0 1.5 mA str STR STR A Notes: 1. These parameters, although guaranteed, are not 100% tested in production. 2. It is recommended to connect a 1 Mresistor between the Latch/SS pin and GND to prevent abnormal operation of the latch protection by noise coupling. © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev.1.0.4 4

F A Typical Performance Characteristics N 7 6 5.05 0 3 1 B 5.03 c 2.5 c — 5.01 ent I 2 G Vref(V) CurrmA)1.5 re 4.99 ply ( 1 en 4.97 Sup 0.5 Cu r 4.95 0 re -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 n t Junction Temperature(℃) Junction Temperature(℃) M o Figure 3. Trimmed Reference Voltage Figure 4. Supply Current d e 13 9 P W VtH 12.5 VtL 8.5 M d 12 d C c Start Threshol(V) 11011..551 cc Stop Threshol(V) 7.58 ontroller Vc 10 V 7 -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 5. V Start Threshold Voltage Figure 6. V Stop Threshold Voltage CC CC 110 100 osc 105 max 98 cy F e D n 100 cl 96 e y or Frequ(KHz) 95 m Duty C (%) 94 at 90 u 92 cill xim Os 85 Ma 90 -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 7. Oscillator Frequency Figure 8. Maximum Duty Cycle 2.7 1.35 VrH VrL old 2.6 old 1.3 h h s s e e gh Thr(V) 2.5 ow Thr(V)1.25 scillator Hi 22..34 Oscillator L 11.1.25 O -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 9. Oscillator High Threshold Voltage Figure 10. Oscillator Low Threshold Voltage © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev.1.0.4 5

F A Typical Performance Characteristics (Continued) N 7 6 0 2 20 1 p B p Current Istr(mA) 011...826 e Protection Vov(V) 111899...826 — Green u g C Start 0.40 ver Volta 181.48 urren O -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 t M Junction Temperature(℃) Junction Temperature(℃) o d Figure 11. Startup Current Figure 12. Over-Voltage Protection Level e P W M 2.8 14 C atch 2.7 soft 13 ont Latch Protection Vl (V) 2222....3456 Soft Start Current I(uA) 111012 roller 2.2 9 -45 -25 -15 0 25 50 80 100 125 140 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 13. Latch Protection Voltage Figure 14. Soft-Start Current 1000 Ct= 10nF ] 8.2nF Hz 100 K 4.7nF [ y 3.3nF c en 2.2nF u q 1nF e Fr 820pF 10 680pF 1 5K 15K 25K 35K 45K Rt[Kohm] Figure 15. Oscillator Frequency Characteristic © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7601B • Rev.1.0.4 6

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