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SP6002
Synchronous Rectifier Driver
DESCRIPTION The fundamental of SP6002 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 SP6002 is capable to adapt in almost all existing forward converters with few adjustments considered necessary. FEATURES * Offers 4 to 8% efficiency improvement over Schottky Diodes (depend on drive configuration of the SR). * * * * * Drives all logic level Power MOSFET. Prediction gate timing control. Minimum MOSFET body diode conduction. Operating frequency up to 650 KHz. Synchronize to transformer voltage waveform. secondary PART MARKING APPLICATIONS * Servers & workstations * * * * Storage area network power supplies Telecommunication converters Embedded systems Industrial & commercial systems using high current processors
PIN CONFIGURATION (SOP-8)
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SP6002
Synchronous Rectifier Driver
TYPICAL APPLCATION CIRCUIT
PIN DESCRIPTION
Pin 1 2 3 4 5 6 7 8 Symbol Timing On Delay Pred MOSG-F 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 Forward MOSFET gate drive. Ground connection. Catch MOSFET gate drive. DC supply voltage. Synchronized signal from transformer's output.
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Synchronous Rectifier Driver
BLOCK DIAGRAM
ORDERING INFORMATION
Part Number SP6002S8RG SP6002S8TG SP6002S8RG : 7Tape Reel ; Pb - Free SP6002S8TG : Tube ; Pb - Free Package SOP-8 SOP-8 Part Marking SP6002I SP6002I
ABSOULTE MAXIMUM RATINGS (TA=25, unless otherwise specified.)
The following ratings designate persistent limits beyond which damage to the device may occur.
Symbol Vdd VSYNC 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 7 7.5 1 1.5 0.25 -40 to 150 -40 to 150 260
Unit V V A A W
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Synchronous Rectifier Driver
THERMAL RESISTANCE
Symbol RJC Parameter Thermal Resistance Junction - Case (*) Value 45 Unit /W
(*) The power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.
ELECTRICAL CHARACTERISTICS
(TA=25, Vdd=5V, VSYNC=5V, Freq. =300 KHz, Duty Cycle=50%, unless otherwise specified.)
Symbol
Parameter
No load
Conditions
Min.
4 3.8 3.9
Typ.
5.5 5.0 4.1 5.0 0.9 4.9 0.1 20 28 23 100
Max.
8 7.0
Unit
mA V V V V V V ns ns ns ns
SUPPLY INPUT Idd Supply current Vonth Vdd turn on threshold(*) Voffth Vdd turn off threshold SYNC REFERENCE (SYNC) Vshth SYNC high voltage Vslth SYNC low voltage MOSFET GATE DRIVER (MOSG-C & MOSG-F) Voh Output high voltage Vol Output low voltage Td Propagation delay Tr Rise time Tf Fall time Tpred Delay time
1.2 5.0 0.2 25 36 30
Io = -200mA Io = 200mA
No load Load = 1nF (**) Load = 1nF (**) No load
4.8 0.0 15 24 20
(*) We have build in a diode from SYNC(pin8) to VDD(pin7). (**) Tr & Tf are measured among 10% and 90% of starting and final voltage.
Vgs
=
MOSG-C
Output
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SP6002
Synchronous Rectifier Driver
PERFORMANCE CHARACTERISTICS (TA=25, unless otherwise specified.)
Figure 1: Supply Current vs Supply Voltage 10 9 8 7 6 ID D 5 (m A) 4 3 2 1 0 3.3 3.5 3.7 4 4.2 4.4 4.6 4.9 5 5.3 5.5 5.7 6.1 V D D (V)
Figure 2: Output Rise Tim e vs Load Capacitor 70 60 50 Tim e 40 (ns) 30 20 10 0 220 330 470 680 1000 CLoad (pF) 1330 1680
20 18 16 14 12 ID D 10 (m A) 8 6 4 2 0
Figure 4: Supply Current vs Load Capacitor
220 330 470 680 1000 1560 2200 2530 2880 CLoa d (pF)
Figure 5: Supply Current vs Freq. @ No Load 7 6 5 ID D 4 (m A) 3 2 1 0 20 50 81 154 184 256 327 380 425 484 554 Frequency (kHz)
Figure 3: Output Fall Tim e vs Load Capacitor 70 60 50 Tim e 40 (ns) 30 20 10 0 220 330 470 680 1000 1330 1680
20 18 16 14 12 IDD 10 (m A) 8 6 4 2 0
Figure 6: Supply Current vs Freq. @ Load=1nF
30
50
70
93
119 128 149 170 176
CLoad (pF)
Frequency (kHz)
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SP6002
Synchronous Rectifier Driver
SOP- 8 PACKAGE OUTLINE
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SP6002
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. (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 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
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