DescriptionThe STR-X6729 is a quasi-resonant topology IC designed for SMPS applications. It shows lower EMI noise characteristics than conventional PWM solutions, especially at greater than 2 MHz. It also provides a soft-switching mode to turn on the internal MOSFET at close to zero voltage (VDS bottom point) by use of the resonant characteristic of primary inductance and a resonant capacitor.

Features and Benefits▪ Quasi-resonant topology IC => Low EMI noise and soft switching
▪ Bottom-skip mode => Improved system efficiency over the entire output load by avoiding increase of switching frequency
▪ Standby mode => Lowers input power at very light output load condition
▪ Avalanche-guaranteed MOSFET => Improves system-level reliability and does not require VDSS derating
▪ 450 VDSS / 0.189 Ω RDS(on)
▪ Various protections => Improved system-level reliability
▫ Pulse-by-pulse drain overcurrent limiting
▫ Overvoltage Protection (bias winding voltage sensing), with latch
▫ Overload Protection with latch
▫ Maximum on-time limit

Applications include the following:▪ Set Top Box
▪ LCD PC monitor, LCD TV
▪ Printer, Scanner
▪ SMPS power supplies

Manufacturer	Sanken
Product Category	AC DC Converters, Offline Switchers
Series	STR-X6700
Packaging	Bulk
Package-Case	TO-3P-7 Fullpack, Formed Leads
Operating-Temperature	-20°C ~ 125°C (TA)
Mounting-Type	Through Hole
Supplier-Device-Package	TO-3PF-7
Watt	360W
Output-Isolation	Isolated
Internal-Switch-s	Yes
Voltage-Breakdown	450V
Topology	Flyback
Voltage-Start-Up	18.2V
Voltage-Supply-Vcc-Vdd	9.7 V ~ 35 V
Duty-Cycle	-
Frequency-Switching	19kHz ~ 25kHz
Fault-Protection	Current Limiting, Over Load, Over Voltage
Control-Features	Soft Start