LM5036 Texas instruments

LM5036

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LM5036

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Описание

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.

High integration controller for small form factor, high-density DC-DC power converters
Integrated 100-V, 100-mA auxiliary bias supply
Fully regulated pre-biased start-up
Enhanced cycle-by-cycle current limiting with pulse matching for low and high primary FETs
Optimized maximum duty cycle for primary-side FETs
Voltage-mode control with input voltage feed-forward
100-V high-voltage start-up regulator
Configurable latch, OVP operation
Integrated 100-V, 2-A MOSFET drivers for primary-side FETs
Programmable dead-time between primary-side and synchronous rectifier (SR) FETs
Create a custom design using the LM5036 with the Excel Calculator Tool or WEBENCH Power Designer

Topology	Full bridge, Half bridge, Push pull
Control mode	Feedforward
Duty cycle (max) (%)	50
Switching frequency (max) (kHz)	2000
Features	Current limiting, Frequency synchronization, High-voltage startup, Input line monitor, Integrated Switch, Leading edge blanking, Multi-topology, Pre-bias startup, Soft start, Synchronization pin, Thermal shutdown, Wide DC input
UVLO thresholds on/off (V)	Programmable/1.25V
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Gate drive (typ) (A)	2