LM5000-3MTCX

• Internal start-up bias regulator
• Programmable input undervoltage lockout (UVLO) has adjustable hysteresis
• Current mode control
• Reference for internal error amplifiers
• Cycle-by-cycle overcurrent protection
• Cutting-edge blanking
• Programmable push-pull or overlapping dead time
• Internal 1.5A sliding door drive
• Programmable soft-start
• Programmable oscillator synchronization function
• Precision benchmarks
• Thermal shutdown

illustrate

The LM5041A PWM controller contains functions to implement either current or voltage feed, push-pull, or bridge power converters. These "cascaded" topologies are ideal for multiple output and higher power applications. The LM5041A's four control outputs include: buck phase control (HD and LD) and push-pull control outputs (PUSH and PULL). The push-pull output drives a duty cycle of 50% nominally at half the step-down switching frequency in one of the stages and can be used for any guaranteed overlap time (current feed application) or guaranteed set-off time (voltage fed application). The push-pull stage MOSFET can drive directly from the internal gate driver, while the buck stage requires an external driver such as the LM5102. The LM5041A includes a high voltage start-up regulator that operates over a wide input range of 15V over a 100V. The PWM controller is designed for high-speed capabilities, including oscillators with a frequency range up to 1 MHz and a total propagation delay of less than 100ns. Other features include input undervoltage lockout (UVLO), soft-start, error amplifier, high-precision voltage reference, and thermal shutdown.

The two differences between the LM5041 and LM5041A are that there is no second level in the "A" version soft-start without current limit (SS) and the "A" version turns off the comparator.

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• Communication power converters
• Industrial power converters
• Multi-output power converter
• +42 V automotive system