SP6853 STANSON | Alldatasheet
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2008/08/10 Ver.1 Page 1 SP6853 Green-Mode PWM Controller DESCRIPTION APPLICATIONS 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. AC/DC Switching Power Adaptor Battery Charger PC 5V Standby Power. Open-Frame Switching Power Supply FEATURES PIN CONFIGURATION High-Voltage BiCMOS Process Very Low Startup Current (<20µA) 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 SOT-23-6L DIP-8P PART MARKING SOT-23-6L DIP-8P
2008/08/10 Ver.1 Page 2 SP6853 Green-Mode PWM Controller TYPICAL APPLCATION CIRCUIT TYPICAL APPLCATION CIRCUIT ( High Efficiency SMPS + Synchronous Rectifier )
2008/08/10 Ver.1 Page 3 SP6853 Green-Mode PWM Controller PIN DESCRIPTION SP6853D8TG Pin Symbol Description
1 OUT Gate driver output to drive the external MOSFET
2 VCC Supply V oltage in
3 NC Unconnected pin
4 CS Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin 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
7 COMP Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback to the internal PWM comparator, so that the PWM comparator can control the duty cycle.
8 GND Ground
1 GND Ground
2 COMP Voltage feedback. The pin provides the output voltage regulation signal., it provides feedback 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. 4 CS Current sense. This pin senses the voltage across a resistor, to control PWM output. This pin also provides current amplitude information for current-mode control
5 VCC Supply V oltage in
6 OUT Gate driver output to drive the external MOSFET
2008/08/10 Ver.1 Page 4 SP6853 Green-Mode PWM Controller
ORDERING INFORMATION
Part Number Package Part Marking SP6853D8TGB DIP-8P SP6853I SP6853S26RGB SOT-23-6L 853YW ※ SP6853D8TGB : Tube ; Pb – Free ; Halogen-Free ※ SP6853S26RGB : 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 Parameter Value Unit VCC DC Supply V oltage 36 V VCOMP / RT / CS COMP / RT / CS V oltage -0.3 ~ 7.0 V PD Power Dissipation @ TA=85℃ (*) 0.3 W ESD Human Body Model 4 KV Machine Model 300 V Tope Operating Ambient Temperature -40 ~ 85 ℃ TJ Operating Junction Temperature Range -40 ~ 150 ℃ TSTG Storage Temperature Range -40 ~ 150 ℃ TLEAD Pb-Free Lead Soldering Temperature for 5 sec. 260 ℃ RӨJC Thermal Resistance Junction – Case (*) SOT-23-6L 210 ℃/W DIP-8P 95 (*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.
2008/08/10 Ver.1 Page 5 SP6853 Green-Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA=25℃, VCC=15V , unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit Supply Voltage ( Vcc Pin ) Istt Startup Current 10 20 uA Iop Operating Current VCOMP = 0V 2.7 4 mA VCOMP = 3V 2.4 mA Protection tripped (OLP, OVP) 1.0 mA UVLO (off) Min. Operating Voltage 9.0 10.0 11.0 V UVLO (on ) Start Threshold Voltage 15.0 16.0 17.0 V OVP Level Over Voltage Protection 24 26 29.5 V Voltage Feedback ( Comp Pin ) Isc Short Circuit Current 1.25 2.2 mA V op Open Loop Voltage 6 V VTH(GM) Green Mode Threshold VCOMP 2.35 V Oscillator ( RT Pin ) FOSC Frequency RT=100KΩ 60.0 68.0 75.0 KHz FOSC(GM) Green Mode Frequency Fs=65.0KHz 22 KHz Fdt Frequency Variation versus Temp. Deviation (-40°C ~105°C) 3 % Fdv Frequency Variation versus VCC Deviation (VCC=11V-25V) 1 % Current Sensing ( CS Pin ) Vcs(off) Maximum Input Voltage 0.8 0.85 0.9 V TLEDD Leading Edge Blanking Time 280 nS Zcs Input impedance 1 MΩ TPD Delay to Output 100 nS Gate Driver Output ( OUT Pin ) DC (Max) Maximum Duty Cycle 70 75 80 % DC (Min) Minimum Duty Cycle 0 % VOL Output Low Level VCC=15V, Io=20mA 1 V VOH Output High Level VCC=15V, Io=20mA 8 V Tr Rising Time Load Cap=1000pF 50 200 nS Tf Falling Time Load Cap=1000pF 30 120 nS OLP ( Over Load Protection ) TLOLP OLP Trip Level 5.0 V TDOLP OLP Delay Time (note) 60 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.
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.)
2008/08/10 Ver.1 Page 8 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 9 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 10 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 11 SP6853 Green-Mode PWM Controller DIP- 8P PACKAGE OUTLINE
2008/08/10 Ver.1 Page 12 SP6853 Green-Mode PWM Controller SOT-23-6L PACKAGE OUTLINE
2008/08/10 Ver.1 Page 13 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. © 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