The LM5036 PWM controller, with integrated
auxiliary bias supply, offers high power density for industrial isolated power
applications. It contains all the features necessary to implement half-bridge power
converters, using voltage-mode control, with input voltage feed-forward. This
controller is intended to operate on the primary side of an isolated converter with
DC input voltage up to 100 V. The controller includes features that improve power
density and reliability while reducing system cost:
- An integrated fly-buck converter as auxiliary bias supply.
Provides bias power for both primary and secondary circuits, with a minimum
of external components.
- Fully regulated pre-bias start-up. Eliminates output voltage
over-shoot or dips even when starting into a pre-charged output
capacitor.
- Enhanced cycle-by-cycle peak current limit with pulse
matching. The controller limits both positive and negative current. Pulse
matching ensures equal pulse width for low and high side devices, to avoid
transformer saturation. Output current limit is approximately constant
across the full range of input voltage.
Device
InformationPART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|
LM5036 | WQFN (28) | 5.00 mm × 5.00 mm |
(1) For all available packages, see the orderable addendum at the end of the data sheet.