LT1243MJ8

Duty Cycle:	96%
Base Part Number:	LT1243
Mounting Type:	Through Hole
Supplier Device Package:	8-CERDIP
Package / Case:	8-CDIP (0.300", 7.62mm)
Operating Temperature:	-55°C ~ 125°C (TJ)
Control Features:	Frequency Control
Fault Protection:	--
Frequency - Switching:	Up to 500kHz
Series:	--
Voltage - Supply (Vcc/Vdd):	7 V ~ 25 V
Voltage - Start Up:	16V
Topology:	Buck
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	Isolated
Part Status:	Obsolete
Packaging:	Tube

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The LT1243MJ8 is an offline switch power management integrated circuit (PMIC) that can provide power conversion capabilities and power management control while acting as a bridge between an AC/DC converter and a power supply. This power management solution is capable of providing excellent performance in applications ranging from managing mobile power sources to powering computer, server, and industrial systems. The LT1243MJ8 utilizes an advanced, switched-mode (SM) power reference architecture to provide precision control of the output voltage and power conversion. This architecture and design implementation help ensure efficient power conversion with an input range of 25-65 Vdc and a maximum output power of 500 W. The design team has developed a wide range of features to enable the IC to achieve its maximum performance. The IC also offers a wide array of configurable frequency, synchronization, power control, monitoring, and protection features. The LT1243MJ8 is based on a fixed-frequency analog-controlled PWM (APWM) topology, which provides the ability to adjust the voltage output by varying the frequency and duty cycle. The LT1243MJ8 has an input voltage range of 25-65 Vdc and a maximum switching frequency range of 1-2 MHz. The converter is designed to operate with a steady-state frequency of 1 MHz when delivering a given load at a constant output voltage. At high duty cycles, the frequency rises, providing higher efficiency and improved output voltage regulation. The converter operates at a minimum duty cycle of 3.25 percent when the output voltage is set to minimum. The LT1243MJ8 includes several configurable control blocks, including a digitally controlled, full-bridge controller, a current sense amplifier, and drive outputs to control the power train. The power conversion is controlled by an on-chip, digitally programmable Analog-to-Digital Converter (ADC). The ADC allows the user to program the output voltage by selecting the reference voltage, the minimum and maximum voltage, the slew rate, and other parameters. The user can also program the output parameters for various operating conditions, allowing for a single design to easily adapt to different operating environments. The IC has advanced control and protection features that help ensure reliable operation and improved system efficiency. Included in the LT1243MJ8 are adjustable overload, short-circuit, and over-temperature protectors to prevent system failures. There are also comprehensive protection functions, such as over-voltage, under-voltage, and over-current protection. A programmable timer with a watchdog that can be set to detect faults is also present on the IC. The LT1243MJ8 also features an onboard temperature sensor, which allows the user to monitor temperature and improve thermal management. Additionally, the IC has the ability to detect EMI disturbances, and has a range of external programmable interfaces (SPI, I2C, UART, PWM, etc.) to accommodate a variety of inputs from external sensors and controllers. The LT1243MJ8 is an extremely versatile power management solution for applications that require a wide variety of input voltages and output power levels. With a combination of features including precise output voltage regulation, wide frequency range, high efficiency, digital control capabilities, and comprehensive protection, the LT1243MJ8 is well-suited for a wide range of applications in consumer, automotive, home appliance, and industrial markets. <div class=\'pmic\'>PMIC - AC DC Converters, Offline Switchers</div>The LT1243MJ8 is a PMIC offering an efficient switch-mode power management solution with a wide input voltage range of 25-65 Vdc and a maximum output power of 500 W. It has an integrated APWM topology which provides a great performance in applications ranging from mobile power sources to powering computer, server, and industrial systems. The device is equipped with several advanced features, such as adjustable overload, over-voltage, under-voltage and over-current protection, as well as an onboard temperature sensor for improved thermal management. It also has a range of external interfaces for connection to external sensors and controllers. The LT1243MJ8 is an ideal solution for applications requiring precise output voltage regulation and high efficiency.

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