The STR-S6707, STR-S6708, and STR-S6709 are specifically designed to meet the requirement for increased integration and reliabil- ity in off-line quasi-resonant flyback converters. These devices incorpo-
rate the primary control and proportional drive circuit with a third- generation high-voltage bipolar switching transistor.
time are fixed during manufacture. Local control circuit decoupling and
layout are optimized within each device.
Cycle-by-cycle current limiting, under-voltage lock-out with hyster-
esis, over-voltage protection, and thermal shutdown protect these
devices during all normal and overload conditions. Over-voltage
protection and thermal shutdown are latched after a short delay. A
versatile triple-level inhibit circuit includes the OFF time synchronization
required to establish quasi-resonant operation. The inhibit function has
also been expanded to initiate operation in stand-by mode in which the
power supply delivers a small fraction of the steady-state output power.
The dual requirements of dielectric isolation and low transient thermal
impedance and steady-state thermal resistance are satisfied in an over-
molded single-in-line power package.
Proven in substantial volumes, these devices and their fixed-
frequency counterparts represent a significant advance in off-line SMPS
reliability growth and integration.
Quasi-Resonant Operation for Low EMI and High Efficiency
Output Power to 220 W
Low-Power Output Standby Mode
Pulse-by-Pulse Over-Current Protection
Latched Over-Voltage and Thermal Protection
Third-Generation Switching Transistor with Proportional Drive
Maximum ON Time and Off Time Set During Manufacture
Internal Under-Voltage Lockout with Hysteresis
Over-Molded SIP with Integral Isolated Heat Spreader
OFF-LINE SWITCHING REGULATORS – WITH BIPOLAR SWITCHING TRANSISTOR
STR6707 datasheet, STR6707 datasheets, STR6707 datenblatt, STR6707