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SP6850
Green-Mode PWM Controller
DESCRIPTION APPLICATIONS
The SP6850 is the current mode PWM controller z AC/DC Switching Power Adaptor
Battery Charger with green-mode power-saving operation, to meet the z
low standby-power needs of low-power SMPS. This z PC 5V Standby Power. green-mode function enables the power supply to z Open-Frame Switching Power Supply easily meet even the strictest power conservation requirements. The functions such as the leading-edge blanking of the current sensing, internal slope
compensation and the small package provide the high efficiency / low cost for SMPS power applications. SP6850 is processed by BiCMOS fabrication, that enables reducing the start-up current and the
operating current. SP6850 is available by SOT-23-6L / DIP-8P packages.
FEATURES z High-Voltage BiCMOS Process z Very Low Startup Current (Typ ~ 8µA) z Under Voltage Lockout (UVLO ) z Current Mode Control with Cycle Peak z Current Limiting z Leading-Edge Blanking z Programmable Switching Frequency z Internal Slope Compensation z Green-Mode Control for Power Saving z Non-audible-noise Green Mode Control z 300mA Driving Capability z OVP (Over Voltage Protection) on Vcc Pin
PIN CONFIGURATION
SOT-23-6L DIP-8P
PART MARKING
SOT-23-6L DIP-8P
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
TYPICAL APPLCATION CIRCUIT
TYPICAL APPLCATION CIRCUIT ( High Efficiency SMPS + Synchronous Rectifier )
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
PIN DESCRIPTION SP6850D8TG 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 SP6850S26RG 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 2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
Package Part Marking SP6850I SP6850I 85AYW 850YW ORDERING INFORMATION Part Number SP6850AD8TG DIP-8P SP6850BD8TG DIP-8P SP6850AS26RG SOT-23-6L SP6850BS26RG SOT-23-6L ※ SP6850AD8TG / SP6850BD8TG : Tube ; Pb – Free ※ SP6850AS26RG / SP6850BS26RG: Tape Reel ; Pb – 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 Voltage 36 V VCOMP / RT / CS COMP / RT / CS Voltage -0.3 ~ 7.0 V PD Power Dissipation @ TA=85℃ (*) 0.3 W Human Body Model 4 KV ESD 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 ℃ SOT-23-6L210 RӨJC Thermal Resistance Junction – Case (*) ℃/W DIP-8P 95 (*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. 2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
ELECTRICAL CHARACTERISTICS (TA=25℃, VCC=15V, unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max.UnitSupply Voltage ( Vcc Pin ) Istt Startup Current 8 20 uA Iop Operating Current VCOMP = 3V 2 4 mA UVLO (off) Min. Operating Voltage 9.0 10.0 11.0V UVLO (on ) Start Threshold Voltage 15.0 16.0 17.0V OVP Level Over Voltage Protection 28 36 V Voltage Feedback ( Comp Pin ) Isc Short Circuit Current 2.2 3.0 mA Vop Open Loop Voltage 5.0 V VTH(GM) Green Mode Threshold VCOMP 2.35 V Oscillator ( RT Pin ) FOSC Frequency RT=100KΩ 60.0 65.0 75.0KHz=FOSC(GM) Green Mode Frequency Fs=65.0KHz 20 KHzFdt Frequency Variation versus Temp. Deviation(-40°C ~105°C) 3 % Fdv Frequency Variation versus VCC Deviation (VCC11V-25V) 1 % Current Sensing ( CS Pin ) SP6850BD8TG 0.8 0.85 0.9 SP6850BS26RG Vcs(off) Maximum Input Voltage V SP6850AD8TG 0.7 0.75 0.8 SP6850AS26RG Zcs Input impedance 50 KΩTPD Delay to Output 150 nS Gate Driver Output ( OUT Pin ) DC (Max) Maximum Duty Cycle 70 75 80 % DC (Min) Minimum Duty Cycle 0 % VCC=15V, VOL 1 V Output Low Level Io=20mA VCC=15V, VOH 8 V Output High Level Io=20mA Tr Load Cap=1000pF 50 200 nS Rising Time Tf Load Cap=1000pF 30 120 nS Falling Time 2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.)
2007/04/10 Ver.3
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SP6850
PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.)
Green-Mode PWM Controller
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
DIP- 8P PACKAGE OUTLINE
2007/04/10 Ver.3
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SP6850
Green-Mode PWM Controller
SOT-23-6L PACKAGE OUTLINE 2007/04/10 Ver.3
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SP6850
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 9F-5, No.3-2, 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
Green-Mode PWM Controller
2007/04/10 Ver.3
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