Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | SIMPLE SWITCHER® |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 6V |
| Voltage - Input (Max) | 75V |
| Voltage - Output (Min/Fixed) | 1.225V |
| Voltage - Output (Max) | 70V |
| Current - Output | 500mA |
| Frequency - Switching | 50kHz ~ 500kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Tổng quan
Description
LM5574MTX is a Texas Instruments switch‑mode power-supply controller (PWM controller). It provides current‑mode control with a fixed switching frequency, plus built‑in protections such as cycle‑by‑cycle current limit and undervoltage lockout. It is designed to regulate DC‑DC converters (and can be used in flyback, buck, or buck/boost topologies) using an external power MOSFET and the usual feedback path to set the output voltage. The MTX suffix indicates the packaging/tape‑and‑reel option used for manufacturing (packaging variant of the device). Typical applications include wall adapters, notebook/PC power supplies, battery chargers, and other compact offline or DC‑DC regulator designs where a controller plus external pass elements is preferred.
Pinout
- Pin count: 8 pins (8-pin package, e.g., SOIC-8/TSSOP-8).
- Function: High-voltage, peak-current-mode PWM controller for off-line flyback converters; drives an external MOSFET and regulates output via feedback, with built-in startup, current-sense, oscillator timing, and protection features.
- Function: High-voltage, peak-current-mode PWM controller for off-line flyback converters; drives an external MOSFET and regulates output via feedback, with built-in startup, current-sense, oscillator timing, and protection features.
Manufacturer
- Manufacturer: Texas Instruments (TI).
- Company type: TI is an American multinational corporation that designs and manufactures semiconductors and integrated circuits (analog, digital, and mixed-signal), and is one of the world’s largest semiconductor companies.
- Company type: TI is an American multinational corporation that designs and manufactures semiconductors and integrated circuits (analog, digital, and mixed-signal), and is one of the world’s largest semiconductor companies.
Application
Application areas of LM5574MTX:
- Switch-mode DC-DC converters (buck, boost, buck-boost) for 5–60 V inputs
- Automotive and industrial power supplies and battery-powered equipment
- LED driver circuits (backlight and general illumination)
- Battery charging and power-path management
- Telecom and consumer electronics regulators (compact power-management solutions)
- Switch-mode DC-DC converters (buck, boost, buck-boost) for 5–60 V inputs
- Automotive and industrial power supplies and battery-powered equipment
- LED driver circuits (backlight and general illumination)
- Battery charging and power-path management
- Telecom and consumer electronics regulators (compact power-management solutions)
Package
LM5574MTX is supplied in an 8-pin MSOP package (MSOP-8, ~3×3 mm).
