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| SP6853 Green-Mode PWM Controller DESCRIPTION The SP6853 is a low cost , low startup current , current mode PWM controller with green-mode power-saving operation. 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 SP6853 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. SP6853 is available by SOT-23-6L / DIP-8P packages. FEATURES High-Voltage BiCMOS Process Very Low Startup Current (<20A) Under Voltage Lockout (UVLO ) Current Mode Control Non-audible-noise Green Mode Control Current Limiting LEB (Leading-Edge Blanking) on CS Pin 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 300mA Driving Capability APPLICATIONS AC/DC Switching Power Adaptor Battery Charger PC 5V Standby Power. Open-Frame Switching Power Supply PIN CONFIGURATION SOT-23-6L DIP-8P PART MARKING SOT-23-6L DIP-8P 2008/08/10 Ver.1 Page 1 SP6853 Green-Mode PWM Controller TYPICAL APPLCATION CIRCUIT TYPICAL APPLCATION CIRCUIT ( High Efficiency SMPS + Synchronous Rectifier ) 2008/08/10 Ver.1 Page 2 SP6853 Green-Mode PWM Controller PIN DESCRIPTION SP6853D8TG Pin Symbol Description 1 OUT Gate driver output to drive the external MOSFET 2 VCC Supply Voltage in 3 NC Unconnected pin Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin 4 CS also provides current amplitude information for current-mode control. 5 RT This current is used to charge an internal capacitor, to determine the switching frequency. 6 NC Unconnected pin Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback 7 COMP to the internal PWM comparator, so that the PWM comparator can control the duty cycle. 8 GND Ground SP6853S26RG Pin Symbol Description 1 GND Ground Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback 2 COMP to the internal PWM comparator, so that the PWM comparator can control the duty cycle 3 RT This current is used to charge an internal capacitor, to determine the switching frequency. Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin 4 CS also provides current amplitude information for current-mode control 5 VCC Supply Voltage in 6 OUT Gate driver output to drive the external MOSFET BLOCK DIAGRAM 2008/08/10 Ver.1 Page 3 SP6853 Green-Mode PWM Controller ORDERING INFORMATION Part Number Package Part Marking SP6853I 853YW SP6853D8TGB DIP-8P SP6853S26RGB SOT-23-6L SP6853D8TG : Tube ; Pb - Free ; Halogen-Free SP6853S26RG : Tape Reel ; 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 VCOMP / RT / CS PD ESD Tope TJ TSTG TLEAD RJC Parameter DC Supply Voltage COMP / RT / CS Voltage Power Dissipation @ TA=85 (*) Human Body Model Machine Model Operating Ambient Temperature Operating Junction Temperature Range Storage Temperature Range Pb-Free Lead Soldering Temperature for 5 sec. Thermal Resistance Junction - Case (*) SOT-23-6L DIP-8P Value 36 -0.3 ~ 7.0 0.3 4 300 -40 ~ 85 -40 ~ 150 -40 ~ 150 260 210 95 Unit V V W KV V /W (*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. 2008/08/10 Ver.1 Page 4 SP6853 Green-Mode PWM Controller ELECTRICAL CHARACTERISTICS (TA=25, VCC=15V, unless otherwise specified.) Symbol Parameter Supply Voltage ( Vcc Pin ) Istt Startup Current Iop Operating Current Conditions VCOMP = 0V VCOMP = 3V Protection (OLP, OVP) tripped Min. Typ. 10 2.7 2.4 1.0 Max. 20 4 Unit uA mA mA mA V V V mA V V KHz KHz % % V nS M nS % % V V 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 Gate Driver Output ( OUT Pin ) DC (Max) Maximum Duty Cycle DC (Min) Minimum Duty Cycle VOL VOH 9.0 15.0 24 10.0 16.0 26 1.25 6 2.35 11.0 17.0 29.5 2.2 RT=100K Fs=65.0KHz (-40C ~105C) (VCC=11V-25V) 60.0 68.0 22 75.0 3 1 0.8 1 0.85 280 100 0.9 70 VCC=15V, Io=20mA VCC=15V, Io=20mA Load Cap=1000pF Load Cap=1000pF 75 0 80 1 Output Low Level Output High Level 8 50 30 5.0 60 200 120 Tr Rising Time Tf Falling Time OLP ( Over Load Protection ) OLP Trip Level TLOLP OLP Delay Time (note) TDOLP switching frequency and the shorter OLP delay time. 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 2008/08/10 Ver.1 Page 5 SP6853 Green-Mode PWM Controller PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.) 2008/08/10 Ver.1 Page 6 SP6853 Green-Mode PWM Controller PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.) 2008/08/10 Ver.1 Page 7 SP6853 Green-Mode PWM Controller PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.) Max Duty Cycle Min Duty Cycle Max Duty Cycle Min Duty Cycle Max Duty Cycle Min Duty Cycle 2008/08/10 Ver.1 Page 8 SP6853 Green-Mode PWM Controller PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.) Rising Time Load Falling Time Load Rising Time Load Falling Time Load Rising Time Load Falling Time Load 2008/08/10 Ver.1 Page 9 SP6853 Green-Mode PWM Controller PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.) Leading Edge Blanking Time OLP Delay Time Leading Edge Blanking Time OLP Delay Time Leading Edge Blanking Time OLP Delay Time 2008/08/10 Ver.1 Page 10 SP6853 Green-Mode PWM Controller DIP- 8P PACKAGE OUTLINE 2008/08/10 Ver.1 Page 11 SP6853 Green-Mode PWM Controller SOT-23-6L PACKAGE OUTLINE 2008/08/10 Ver.1 Page 12 SP6853 Green-Mode PWM Controller 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. (c)The SYNC Power logo is a registered trademark of SYNC Power Corporation (c)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 2008/08/10 Ver.1 Page 13 |
Price & Availability of SP6853S26RGB
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