Specifications
33PLCs: Featured Products
High Level of Integration Reduces Design
Cost and Complexity in Universal Oine
Power Supplies
MAX17497, MAX17498
The MAX17497 simplies your power design by eliminating multiple discrete
components. This multiple-output device integrates the control circuitry needed
for a universal (85V to 265V AC) yback/forward power supply. It also integrates
a secondary-side synchronous buck regulator with on-board MOSFETs.
The MAX17497 combines a current mode PWM yback/forward regulator,
which contains all the control circuitry required for design of wide input
voltage nonisolated power supplies, and a synchronous buck regulator. The
MAX17498 is an easy to use current mode PWM yback/forward regulator for
oine AC-DC or stand-alone DC-DC yback/forward/boost applications.
Benefits
• High integration reduces BOM
◦ Two on-board regulators: AC-DC and
DC-DC combined
◦ Power FETs integrated
• Enables small solution
◦ Fast 500kHz switching allows use of
small external components
+3.3V, 250mA
+12V, 750mA
L1 L2 L3 N
EXTERNAL
CASCODE
BUCK
CONTROL
• 1MHz
• INTERNAL COMP
• PRESET OUTPUT
• INTERNAL SS
FLYBACK
CONTROL
• 250kHz/500kHz
• EXTERNAL COMP
• EXTERNAL SS
• PROTECTION
MAX17497
Simplified application circuit for the MAX17497.