SP6851 Green-Mode Power Switch DESCRIPTION The SP6851 is a low cost, low startup current, current mode PWM controller with green-mode power-saving operation. Built-in 650V MOSFET provides simple design for adapter. The integrated functions include the leading-edge blanking of the current sensing, internal slope compensation. It would provide the users a superior AC/DC power application of higher efficiency, low external component counts, and lower cost solution for applications. The SP6851 features more protections or functions for the following characteristics : ※Add OLP (Over Load Protection) function to provide better protection performance for fault conditions like short circuit or over load. ※Modify the OVP (Over Voltage Protection) mechanism from the cycle-by-cycle mode to the hiccup mode. SP6851 is available in DIP-8P package. APPLICATIONS AC/DC Switching Power Adaptor Battery Charger PC 5V Standby Power. Open-Frame Switching Power Supply FEATURES High-Voltage BiCMOS Process Very Low Startup Current (<20µA) Under Voltage Lockout (UVLO ) Current Mode Control Non-audible-noise Green Mode Control Current Limiting OLP (Over Load Protection) OVP (Over Voltage Protection) on Vcc Pin Leading-Edge Blanking Programmable Switching Frequency Internal Slope Compensation Green-Mode Control for Power Saving PIN CONFIGURATION Building in 650V MOSFET DIP-8P PART MARKING DIP-8P 2012/08/09 Ver.2 Page 1 SP6851 Green-Mode Power Switch TYPICAL APPLCATION CIRCUIT TYPICAL APPLCATION CIRCUIT for HIGH EFFICIENCY SMPS 2012/08/09 Ver.2 Page 2 SP6851 Green-Mode Power Switch PIN DESCRIPTION Pin 1 2 3 4 5 6 7 8 Symbol Description Source Power MOSFET Source Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin CS also provides current amplitude information for current-mode control. GND Ground RT This current is used to charge an internal capacitor, to determine the switching frequency. Voltage feedback. The pin provides the output voltage regulation signal, it provides feedback COMP to the internal PWM comparator, so that the PWM comparator can control the duty cycle. VCC Supply Voltage in Drain Power MOSFET Drain Drain Power MOSFET Drain BLOCK DIAGRAM 2012/08/09 Ver.2 Page 3 SP6851 Green-Mode Power Switch ORDERING INFORMATION Part Number SP6851D8TG SP6851D8TGB ※ SP6851D8TG : Tube ; Pb – Free Package Part Marking DIP-8P DIP-8P SP6851I SP6851I ※ SP6851D8TGB : Tube ; Pb – Free ; Halogen – Free ABSOULTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.) The following ratings designate persistent limits beyond which damage to the device may occur. Symbol VCC EAS Tope TJ TSTG Parameter DC Supply Voltage COMP / RT / CS Voltage MOSFET Breakdown Voltage Power Dissipation @ TA=85℃ (*) Human Body Model Machine Model Single Pulse Avalanche Energy Operating Ambient Temperature Operating Junction Temperature Range Storage Temperature Range Value 36 -0.3 ~ 7.0 650 0.3 4 300 49 -40 ~ 85 -40 ~ 150 -40 ~ 150 Unit V V V W KV V mJ ℃ ℃ ℃ RӨJC Thermal Resistance Junction – Case (*) 95 ℃/W VCOMP / RT / CS VDS PD ESD (*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. 2012/08/09 Ver.2 Page 4 SP6851 Green-Mode Power Switch ELECTRICAL CHARACTERISTICS (TA=25℃, VCC=15V, unless otherwise specified.) Symbol Parameter Supply Voltage ( Vcc Pin ) Istt Startup Current Iop Operating Current UVLO (off) Min. Operating Voltage UVLO (on ) Start Threshold Voltage OVP Level Over Voltage Protection Voltage Feedback ( Comp Pin ) Isc Short Circuit Current Vop Open Loop Voltage VTH(GM) Green Mode Threshold VCOMP Oscillator ( RT Pin ) FOSC Frequency FOSC(GM) Green Mode Frequency Fdt Frequency Variation versus Temp. Deviation Fdv Frequency Variation versus VCC Deviation Current Sensing ( CS Pin ) Vcs(off) Maximum Input Voltage Leading Edge Blanking Time TLEDD Zcs Input impedance TPD Delay to Output MOSFET DC (Max) Maximum Duty Cycle DC (Min) Minimum Duty Cycle VDSS Drain-Source Breakdown Voltage IDSS Drain-Source Leakage Current RDS(ON) On-State Resistance VSD Forward On Voltage Co Output capacitance Tr Rising Time Tf Falling Time OLP ( Over Load Protection ) OLP Trip Level TLOLP TDOLP OLP Delay Time (note) Conditions Min. VCOMP = 0V VCOMP = 3V Protection (OLP, OVP) tripped Max. Unit 10 2.7 2.4 20 4 uA mA mA 1.0 9.0 15.0 26 RT=100KΩ Fs=65.0KHz (-40°C ~105°C) (VCC=11V-22V) Typ. 60.0 mA 10.0 16.0 27 11.0 17.0 29.5 V V V 1.25 6 2.35 2.2 mA V V 68.0 22 70.0 KHz KHz % % 3 1 0.8 0.85 280 0.9 V nS MΩ nS 80 % % V uA Ω V 1 100 70 VGS=0V, ID=250uA VGS=0V, VDS=550V VGS=10V, ID=1A VGS=0V, IS=1.4A VGS=0V, VDS=25V, f=1.0MHz 75 0 650 10 4.95 1.5 27 50 30 5.0 60 pF 200 120 nS nS V mS Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will set the higher switching frequency and the shorter OLP delay time. 2012/08/09 Ver.2 Page 5 SP6851 Green-Mode Power Switch PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) 2012/08/09 Ver.2 Page 6 SP6851 Green-Mode Power Switch PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) 2012/08/09 Ver.2 Page 7 SP6851 Green-Mode Power Switch PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) Max Duty Cycle Max Duty Cycle Max Duty Cycle 2012/08/09 Ver.2 Min Duty Cycle Min Duty Cycle Min Duty Cycle Page 8 SP6851 Green-Mode Power Switch PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) 2012/08/09 Rising Time Load Falling Time Load Rising Time Load Falling Time Load Rising Time Load Falling Time Load Ver.2 Page 9 SP6851 Green-Mode Power Switch PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) Leading Edge Blanking Time Leading Edge Blanking Time Leading Edge Blanking Time 2012/08/09 Ver.2 OLP Delay Time OLP Delay Time OLP Delay Time Page 10 SP6851 Green-Mode Power Switch DIP- 8P PACKAGE OUTLINE 2012/08/09 Ver.2 Page 11 SP6851 Green-Mode Power Switch Information provided is alleged to be exact and consistent. SYNC Power Corporation presumes no responsibility for the penalties of use of such information or for any violation of patents or other rights of third parties that may result from its use. No license is granted by allegation or otherwise under any patent or patent rights of SYNC Power Corporation. Conditions mentioned in this publication are subject to change without notice. This publication surpasses and replaces all information previously supplied. SYNC Power Corporation products are not authorized for use as critical components in life support devices or systems without express written approval of SYNC Power Corporation. ©The SYNC Power logo is a registered trademark of SYNC Power Corporation ©2004 SYNC Power Corporation – Printed in Taiwan – All Rights Reserved SYNC Power Corporation 7F-2, No.3-1, Park Street NanKang District (NKSP), Taipei, Taiwan, 115, R.O.C Phone: 886-2-2655-8178 Fax: 886-2-2655-8468 http://www.syncpower.com 2012/08/09 Ver.2 Page 12