FAN7601BGX

FAN7601B — Green Current Mode PWM Controller February 2011 FAN7601B Green Current Mode PWM Controller Features          Green Current Mode PWM Control Low Operating Current: Maximum 4mA Burst Mode Operation Internal High-Voltage Startup Switch Under-Voltage Lockout (UVLO): 12V/8V Latch Protection and Soft-Start Function Over-Voltage Protection: 19V Operating Frequency up to 300kHz Description The FAN7601B is a programmable frequency green current mode PWM controller. It is specially designed for the offline adapter applications and the auxiliary power supplies that require high efficiency at light load and no load. The internal high-voltage startup switch and burst mode reduce the power loss. FAN7601B includes protections, such as latch protection and over-voltage protection. The latch protection can be used for over-voltage protection, thermal protection, and others. The soft-start prevents the output voltage overshoot at startup. Maximum Duty Cycle: 95% Applications   Offline Adapter Applications Auxiliary Power Supplies Related Resources  AN4129 — Green Current Mode PWM Controller FAN7601 Ordering Information Part Number FAN7601BM FAN7601BMX FAN7601BGX -40C to +85C Operating Junction Temperature Top Mark 7601B 7601B 7601B Package 8-SOP 8-SOP 10-SSOP Packing Method Rail Tape & Reel Tape & Reel © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev. 1.0.2 www.fairchildsemi.com FAN7601B — Green Current Mode PWM Controller Block Diagram VREF (10) 8 VSTR (1) 1 7 5V Ref Rt/Ct (5) 4 OSC UVLO VREF 12µA S Q R 6 OUT (7) Enable Startup Circuit OVP VCC (8)   19V   12V/8V Latch/SS 3 (4) 1.5V OVP   2.5V S Q R Delay Circuit   0.97V/0.9V 2 CS/FB (3) 1V GND (6) 5   Startup Circuit Reset Circuit    Latch/SS 1V Figure 1. Internal Block Diagram Note: 1. ( ) is 10-SSOP Pin Number. © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 2 FAN7601B — Green Current Mode PWM Controller Pin Configurations Figure 2. 8-Pin Configuration (Top View) Figure 3. 10-Pin Configuration (Top View) Pin Definitions Pin # (8-Pin) 1 2 3 4 5 6 7 8 Pin # (10-Pin) 1 3 4 5 6 7 8 10 Name VSTR CS/FB Latch/SS Rt/Ct GND Out VCC VREF Description Startup Current Sense and Feedback Latch Protection and Soft-Start Oscillator Timing Ground Gate Drive Output IC Power Supply Voltage Reference © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 3 FAN7601B — Green Current Mode PWM Controller Absolute Maximum Ratings 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. Symbol VCC VCS/FB TSTG TJ IO VSTR ESD Supply Voltage Input Voltage CS/FB Storage Temperature Parameter Min. -0.3 -55 -40 Max. 20 20.0 +150 +150 250 500 Unit V V C C mA V V Recommended Operating Junction Temperature Output Current VSTR Input Voltage Electrostatic Discharge Capability Human Body Model, JESD22-A114 Charged Device Model, JESD22-C101 2000 1500 Thermal Impedance Symbol JA Parameter Thermal Resistance, Junction-to-Ambient 8-SOP 10-SSOP Value 180 130 Unit °C/W © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 4 FAN7601B — Green Current Mode PWM Controller Electrical Characteristics TA=-25C~125C, VCC=14V, RT=9.5k, CT=2.2nF unless otherwise specified. Symbol Reference Section VREF VREF1 VREF2 fOSC STV VOSC VCS/FB1 DMAX DMIN VCS/FB2 VCS/FB3 ISS VSL VLATCH VOVP VtH VtL IOP VOL VOH tr tf Parameter Reference Output Voltage Line Regulation Load Regulation Initial Accuracy Voltage Stability Amplitude CS/FB Threshold Voltage1 Maximum Duty Cycle Minimum Duty Cycle CS/FB Threshold Voltage2(2) CS/FB Threshold Voltage3 Soft-Start Current Soft-Start Limit Voltage Latch Voltage Over-Voltage Protection Start Threshold Voltage Minimum Operating Voltage Operating Supply Current Low Output Voltage High Output Voltage Rising Time (2) (3) (2) Conditions IO=1mA VCC=10V~18V IO=1mA ~ 10mA Min. 4.85 Typ. 5.00 10 20 Max. 5.15 20 30 110 1.5 Unit V mV mV kHz % V Oscillator Section 90 VCC=10V~18V Vpin4 peak-to-peak 0.9 TA=25°C 92 100 1.0 1.25 1.0 95 1.1 98 0 0.77 0.7 Vpin3=GND ISS=1A 9 1.2 2.25 18 11 7 0.97 0.9 12 1.5 2.50 19 12 8 3 TA=25C, IO=100mA TA=25C, IO=-100mA TA=25C, CI=1nF TA=25C, CI=1nF 11.5 2.0 12.0 45 35 1.17 1.1 15 1.8 2.75 20 13 9 4 2.5 14.0 150 150 PWM Section V % % V V A V V V V V mA V V ns ns Burst Mode Section Soft-Start Section Protection Section UVLO Section Total Current Section Output Section Falling Time(2) Startup Section Istr VSTR Startup Current VSTR=30V, TA=25°C 0.5 1.0 1.5 mA Notes: 2. These parameters, although guaranteed, are not 100% tested in production. 3. It is recommended to connect a 1Mresistor between the Latch/SS pin and GND to prevent abnormal operation of the latch protection by noise coupling. © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 5 FAN7601B — Green Current Mode PWM Controller Typical Performance Characteristics 5.05 Supply Cur r ent I cc (mA) 3 2.5 2 5.03 Vref (V) 5.01 4.99 4.97 4 .95 -45 -25 -15 0 25 50 80 100 125 140 1.5 1 0.5 0 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 4. Trimmed Reference Voltage 13 Vcc Star t Thr eshold VtH (V) Vcc Stop Thr eshold VtL (V) Figure 5. Supply Current 9 8.5 8 7.5 7 -45 -25 -15 0 25 50 80 100 125 140 12.5 12 11.5 11 10.5 10 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 6. VCC Start Threshold Voltage 110 Oscillator Frequency Fos c (KHz) 105 100 95 90 85 -45 -25 -15 0 25 50 80 100 125 140 Maximum Duty Cycle Dmax (%) Figure 7. VCC Stop Threshold Voltage 100 98 96 94 92 90 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 8. Oscillator Frequency 2.7 O scillator High Thr eshold Vr H (V) O scillator L ow Thr eshold Vr L (V) Figure 9. Maximum Duty Cycle 1.35 2.6 1.3 2.5 1.25 2.4 1.2 2 .3 -45 -25 -15 0 25 50 80 100 125 140 1.15 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Junction Temperature(℃) Figure 10. Oscillator High Threshold Voltage © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 Figure 11. Oscillator Low Threshold Voltage www.fairchildsemi.com 6 FAN7601B — Green Current Mode PWM Controller Typical Performance Characteristics (Continued) Over Voltage Protection Vov p (V) 2 1.6 1.2 0.8 0.4 0 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) 20 19.6 19.2 18.8 18.4 18 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Star t up Cur r ent Istr (mA) Figure 12. Startup Current Figure 13. Over-Voltage Protection Level 2.8 Latch Protection Vlatc h ( V) Soft Start Curren t Iso f (uA) 14 13 12 11 10 9 2.7 2.6 2.5 2.4 2.3 2 .2 -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature( ℃) -45 -25 -15 0 25 50 80 100 125 140 Junction Temperature(℃) Figure 14. Latch Protection Voltage Figure 15. Soft-Start Current 1000 Ct= 10nF Frequen cy[KHz ] 100 8.2nF 4.7nF 3.3nF 2.2nF 1nF 10 820pF 680pF 1 5K 15K 25K Rt[Kohm] 35K 45K Figure 16. Oscillator Frequency Characteristic © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 7 FAN7601B — Green Current Mode PWM Controller Physical Dimensions 5.00 4.80 3.81 8 5 A 0.65 B 6.20 5.80 4.00 3.80 1.75 5.60 PIN ONE INDICATOR 1 4 1.27 0.25 M (0.33) CBA 1.27 LAND PATTERN RECOMMENDATION 0.25 0.10 1.75 MAX C 0.10 0.51 0.33 0.50 x 45° 0.25 C SEE DETAIL A 0.25 0.19 OPTION A - BEVEL EDGE R0.10 R0.10 GAGE PLANE 0.36 OPTION B - NO BEVEL EDGE NOTES: UNLESS OTHERWISE SPECIFIED A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA, ISSUE C, B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08AREV13 8° 0° 0.90 0.406 SEATING PLANE (1.04) DETAIL A SCALE: 2:1 Figure 17. 8-Lead, Small Outline Package (SOP) 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/. © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 8 FAN7601B — Green Current Mode PWM Controller Physical Dimensions 5.12 4.72 4.00 10 6 1.75 6.30 5.70 4.15 3.75 0.65 5.60 #1 PIN ONE INDICATOR TOP VIEW 5 (1.00) #1 (1.00) LAND PATTERN RECOMMENDATION SEE DETAIL A R0.20 0.30 0.15 1.80 MAX 0.25 0.10 (0.26) 0.506 0.306 SIDE VIEW R0.15 NOTES: A) NO DRAWING STANDARD APPLIES TO THIS PACKAGE B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS. 0.70 D) LAND PATTERN RECOMMENDATION IS FSC SOURCED. E) DRAWING FILE NAME AND REVISION : MKT-MSB10A,REV1 0.30 END VIEW R0.15 GAGE PLANE (0.36) 8¡Æ (2.04) DETAIL A SCALE: 2:1 SEATING PLANE Figure 18. 10-Lead, Small Outline Package (SSOP) 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/. © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 9 FAN7601B — Green Current Mode PWM Controller © 2008 Fairchild Semiconductor Corporation FAN7601B • Rev.1.0.2 www.fairchildsemi.com 10