SP6012 Synchronous Rectifier Driver DESCRIPTION The fundamental of SP6012 synchronous rectifier (SR) driver IC is based on our U.S. patented methods that utilize the principle of “prediction” logic circuit. The IC deliberates previous cycle timing to control the SR in present cycle by “predictive” algorithm that makes adjustments to the turn-off time, in order to achieve maximum efficiency and avoid cross-conduction at the same time. It also maintains the MOSFET’s body diode conduction at minimum level. The SP6012 is capable to adapt in almost all existing forward converters with few adjustments considered necessary. APPLICATIONS • Servers & workstations FEATURES • Offers 4 to 8% efficiency improvement over Schottky Diodes (depend on drive configuration of the SR). PIN CONFIGURATION (SOP-10P) • Drives all level Power MOSFET. • Prediction gate timing control. • Minimum MOSFET body diode conduction. • Operating frequency up to 650 KHz. • Synchronize to transformer voltage waveform. 2010/01/ 05 • Storage area network power supplies • Telecommunication converters • Embedded systems • Industrial & commercial systems using high current processors PART MARKING (SOP-10P) secondary Ver.2 Page 1 SP6012 Synchronous Rectifier Driver TYPICAL APPLCATION CIRCUIT PIN DESCRIPTION Pin 1 2 3 4 5 6 7 8 9 10 2010/01/ 05 Symbol Timing On Delay PreC Adj PreF Adj MOSG-F VR GND MOSG-C Vdd SYNC Description Discontinuous current filter timing adjustment resistor connection. Imposed delay between Catch gate turn OFF and Forward gate turn ON. Capacitor to store previous cycle timing for Catch MOSFET Capacitor to store previous cycle timing for Forward MOSFET Forward MOSFET gate drive. Voltage Regulator Ground connection. Catch MOSFET gate drive. DC supply voltage. Synchronized signal from transformer’s output. Ver.2 Page 2 SP6012 Synchronous Rectifier Driver BLOCK DIAGRAM ORDERING INFORMATION Part Number Package SP6012S10RG SOP-10P SP6012S10RGB SOP-10P ※ SP6012S10RG : 7＂Tape Reel ; Pb – Free Part Marking SP6012I SP6012I ※ SP6012S10RGB : 7＂Tape Reel ; Pb – Free ; Halogen - Free 2010/01/ 05 Ver.2 Page 3 SP6012 Synchronous Rectifier Driver ABSOULTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.) The following ratings designate persistent limits beyond which damage to the device may occur. Symbol Vdd SYNC IOUT PD TJ TSTG TLEAD Parameter DC Supply Voltage SYNC Voltage Peak Source Current (Pulsed) Peak Sink Current (Pulsed) Power Dissipation @ TA=85℃ (*) Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature for 5 sec. Value 17 7 3 3 0.25 -40 to125 -40 to 150 260 Unit V V A A W ℃ ℃ ℃ Value 45 Unit ℃/W THERMAL RESISTANCE Symbol RӨJC Parameter Thermal Resistance Junction – Case (*) (*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions. ELECTRICAL CHARACTERISTICS (TA=25℃, Vdd=12V, Freq. =300 KHz, Duty Cycle=50%, unless otherwise specified.) Symbol Parameter Conditions Min. Typ. 8 10 10 9.5 8.5 Max. Unit 15 10 mA mA V V SUPPLY INPUT IDD Supply current Vonth Vdd turn on threshold Voffth Vdd turn off threshold SYNC REFERENCE (SYNC) Vshth SYNC high threshold Vslth SYNC low threshold MOSFET GATE DRIVER (MOSG-C) Voh Output high voltage Vol Output low voltage Td Propagation delay Tpred Tr Rise time Tf Fall time No load VSYNC=0V, No load 3.9 Io = -200mA Io = 200mA No load No load Load = 1nF (*) Load = 1nF (*) 11.5 5.0 0.9 11.8 0.1 50 120 50 35 1.2 0.2 100 60 (*) Tr & Tf are measured among 10% and 90% of starting and final voltage. 2010/01/ 05 Ver.2 Page 4 V V V V ns ns ns ns SP6012 Synchronous Rectifier Driver PERFORMANCE CHARACTERISTICS (TA=25℃, unless otherwise specified.) *Fig. 1 : No Load ; No SYNC *Fig. 4~5 : Frequency = 65 kHz. SOP- 10P PACKAGE OUTLINE 2010/01/ 05 Ver.2 Page 5 SP6012 Synchronous Rectifier Driver 2010/01/ 05 Ver.2 Page 6 SP6012 Synchronous Rectifier Driver 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 2010/01/ 05 Ver.2 Page 7