STEVAL-ISA167V1 STMicroelectronics

STEVAL-ISA167V1 Evaluation board: SRK2001 adaptive synchronous rectification controller for LLC resonant converters with STL85N6F3 Data brief Description The STEVAL-ISA167V1 is a product evaluation board designed to demonstrate the performance of the SRK2001 synchronous rectification controller. The SRK2001 implements a control scheme specific for secondary-side synchronous rectification in LLC resonant converters that use a transformer with center-tap secondary winding for full-wave rectification. It provides two high- current gate-drive outputs (for driving N-channel power MOSFETs). Each gate driver is controlled separately and an interlock logic circuit prevents the two synchronous rectifier (SR) MOSFETs from conducting simultaneously. Device operation is based on adaptive algorithms for both turn-on and turn-off of SR MOSFETs. During Features fast load transitions or during above resonance Synchronous rectifier for LLC resonant operation, a further turn-off mechanism is converter, with adaptive turn-on and turn-off provided, based on a ZCD OFF comparator that V range: 4.5 V to 32 V CC triggers the gate drive circuit for very fast Max frequency: 500 kHz MOSFET turn-off. The board includes two SR Dual gate drive for N-channel MOSFETs MOSFETs (PowerFlat package) and can be (strd level driver) easily implemented in an existing converter as a SR MOSFET type: STL85N6F3 (60 V 6.5 substitute for rectifier diodes. m) PowerFLAT RoHS compliant April 2015 DocID027536 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Obsolete Product(s) - Obsolete Product(s)Schematic diagram STEVAL-ISA167V1 1 Schematic diagram Figure 1: STEVAL-ISA167V1 circuit schematic GSPG19022015DI1515 2/4 DocID027536 Rev 1 Obsolete Product(s) - Obsolete Product(s) +12V Q503 BC847 R508 1k0 R501 C502 R509 0R C501 R502 2n7 1k0 U501 SRK2001 100k 1uF 1 10 VCC EN R503 2 9 GND PROG 3 8 0R GD1 GD2 DR1 4 7 SVS1 SVS2 DR2 5 6 JP501 D501 DVS1 DVS2 D502 1 DR2 1 2 2 3 3 4 N.M. N.M. SRC2 4 5 5 R504 R505 6 6 7 +12V 7 8 8 100R 100R 9 9 R510 R511 10 SRC1 10 11 11 N.M. Q501 R506 R507 Q502 N.M. 12 12 STL85N6F3 STL85N6F3 13 DR1 13 C503 0R 0R C504 HEADER 13 N.M. N.M. Q504 R512 R513 Q505 N.M. N.M. N.M. N.M. SRC1 SRC2