The LM5033 high-voltage PWM controller contains all the functionality needed to implement push-pull, half-bridge, and full-bridge topologies. Applications include closed-loop voltage-mode converters with highly regulated output voltage, or open-loop DC transformers such as intermediate bus converters (IBCs) with efficiencies greater than 95%. Two alternate grid driver outputs with a specified dead time.
The LM5033 includes a starting regulator that operates over a wide input range of 15 V to 100 V. Other features include: precision voltage reference output, current limit detection, remote shutdown, soft start, synchronization capability and hot shutdown. This high speed IC has an oscillator with a total propagation delay of less than 100 ns and 1 mhz capability.
LM503 Pin Configuration
LM5033 Typical Application Circuit
LM5033 Functional Block Diagram
Features
● Internal high voltage (100v) starting regulator
● Single resistance oscillator setup
● Synchronizable
● Precise reference output
● Adjustable soft boot
● Overcurrent protection
● Direct optical coupler interface
● 1.5-A peak gate driver
● Hot shutdown
Applications
● Intermediate DC-DC bus converter
● Telecommunication power converter
● Industrial power converter
● 42-V automotive systems
