STR-S6703 AND STR-S6704
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
TYPICAL QUASI-RESONANT FLYBACK CONVERTER
WARNING: lethal potentials are present. See text.
9
+
7
8
R
S
Q
+
+
+
+
5
4
3
1
2
6
#
+ OUTPUT
+
VOLTAGE
SENSE
– OUTPUT
Dwg. EK-004A
APPLICATIONS INFORMATION
WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit
designs that embody these components must conform with applicable safety requirements. Precau-
tions must be taken to prevent accidental contact with power-line potentials. Do not connect
grounded test equipment.
The use of an isolation transformer is recommended during circuit development and breadboarding.
Recommended mounting hardware torque:
4.34 – 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm).
Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease:
Dow Corning 340, or equivalent
www.allegromicro.com