description:
Linear's LT8582 is a fault-protected dual independent PWM DC/DC converter that includes a 42V main switch and a 42V slave switch. The total current used in parallel is 3A with overvoltage, overtemperature and output short-circuit protection. Operating voltage 2.5V-22V, switching frequency up to 2.5MHz, each channel can be easily configured as boost, SEPIC, reverse or flyback converter, mainly used in local power supply, VFD bias supply, TFT-LCD bias supply and Automotive Engine Control Unit (ECU) Power Supply. This article describes the main features of the LT8582, block diagrams, basic application circuits, and a variety of typical application circuits and component layouts for both topologies.
The LT8582 is a dual independent channel PWM DC/DC converter with a power good pin and built-in fault protection to help guard against input overvoltage and overtemperature conditions. Each channel consists of a 42V master switch and a 42V slave switch that can be Together for a total current limit of 3A.
The LT8582 is ideal for many local power supply designs. Each channel can be easily configured in boost, SEPIC, inverting, or flyback configurations. Together, the two channels can produce a 12V and a –12V output with 14.4W of combined output power from In addition, the LT8582's slave switch allows the part to be configured in high voltage, high power charge pump topologies that are more efficient and require fewer components than traditional circuits. The LT8582 also features innovative SHDN pin circuitry that allows for slowly The additional features such as output short protection, frequency foldback and soft-start are integrated. The LT8582 is available in a 24-pin 7mmx 4mm DFN package.
LT8582 main features:
- Dual 42V, 3A Combined Power Switch
- Master/Slave (1.7A/1.3A) Switch Design
- Wide Input Range: 2.5V to 22V Operating, 40V Maximum Transient
- Power Good Pin for Event Based Sequencing
- Switching Frequency Up to 2.5MHz
- Each Channel Easily Configurable as a Boost, SEPIC, Inverting or Flyback Converter
- Low VCESAT Switch: 270mV at 2.75A (Typical)
- Can be Synchronized to an External Clock
- Output Short-Circuit Protection
- High Gain SHDN Pin Accepts Slowly Varying Input Signals
- 24-Pin 7mmx 4mm DFN Package
LT8582 application:
- Local Power Supply
- Vacuum Fluorescent Display (VFD) Bias Supplies
- TFT-LCD Bias Supplies
- Automotive Engine Control Unit (ECU) Power
See the PDF document for details.
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