規格
| 屬性 | 價值 |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | SupIRBuck® |
| ProductStatus | Obsolete |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Adjustable |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 5V |
| Voltage-Input(Max) | 21V |
| Voltage-Output(Min/Fixed) | 0.6V |
| Voltage-Output(Max) | 18.06V |
| Current-Output | 25A |
| Frequency-Switching | 300kHz ~ 1.5MHz |
| SynchronousRectifier | Yes |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 35-PowerVQFN |
概述
Description
IR3447MTRPBF is an off-line switch‑mode power-supply controller from International Rectifier (now Infineon). The MTRPBF suffix indicates the M‑package variant, Tape-and-Reel packaging, Pb‑free.
用途: designed for flyback/off-line SMPS and LED drivers, providing primary‑side PWM control for a power MOSFET driven from the high-voltage rail.
Key features (typical): high-voltage start‑up/bias, current‑mode control, protection functions (overcurrent/short‑circuit, overvoltage, undervoltage lockout), thermal shutdown, and soft‑start. It supports primary‑side regulation in opto‑isolator–free designs and requires an external MOSFET plus standard sense and bias components per application.
Common applications: AC adapters, wall‑wart supplies, TV/monitor power supplies, and LED driver circuits.
用途: designed for flyback/off-line SMPS and LED drivers, providing primary‑side PWM control for a power MOSFET driven from the high-voltage rail.
Key features (typical): high-voltage start‑up/bias, current‑mode control, protection functions (overcurrent/short‑circuit, overvoltage, undervoltage lockout), thermal shutdown, and soft‑start. It supports primary‑side regulation in opto‑isolator–free designs and requires an external MOSFET plus standard sense and bias components per application.
Common applications: AC adapters, wall‑wart supplies, TV/monitor power supplies, and LED driver circuits.
Features
IR3447MTRPBF features (concise):
- PWM controller for VRM/buck applications using current-mode control
- Wide input/bias range suitable for VRM environments
- Programmable switching frequency with slope compensation
- Soft-start to limit inrush and stabilize regulation
- External sense options: current sense and voltage feedback for regulation
- Fault protections: overcurrent/short-circuit, overvoltage, undervoltage lockout
- Over-temperature protection with safe shutdown
- Enable/shutdown control and fault reporting
- Low quiescent current when disabled
- Pb-free MTRPBF package for surface-mount assembly
Note: exact electrical specs (voltage ranges, frequency range, sense pin details) are in the datasheet; confirm for your design requirements.
- PWM controller for VRM/buck applications using current-mode control
- Wide input/bias range suitable for VRM environments
- Programmable switching frequency with slope compensation
- Soft-start to limit inrush and stabilize regulation
- External sense options: current sense and voltage feedback for regulation
- Fault protections: overcurrent/short-circuit, overvoltage, undervoltage lockout
- Over-temperature protection with safe shutdown
- Enable/shutdown control and fault reporting
- Low quiescent current when disabled
- Pb-free MTRPBF package for surface-mount assembly
Note: exact electrical specs (voltage ranges, frequency range, sense pin details) are in the datasheet; confirm for your design requirements.
Pinout
- Pin count: 28 pins (28-pin package)
- Function: IR3447MTRPBF is a PWM controller for VRM/multi‑phase buck converters. It provides voltage regulation for CPU/GPU cores by controlling external MOSFETs, with feedback, oscillator, soft-start, and protections (OC/OV/UV, etc.).
- Function: IR3447MTRPBF is a PWM controller for VRM/multi‑phase buck converters. It provides voltage regulation for CPU/GPU cores by controlling external MOSFETs, with feedback, oscillator, soft-start, and protections (OC/OV/UV, etc.).
Manufacturer
Manufacturer: Infineon Technologies AG (the IR prefix comes from International Rectifier, which Infineon acquired in 2015).
What kind of company: a German multinational semiconductor company that designs and manufactures power electronics, automotive, industrial, and security semiconductor solutions.
What kind of company: a German multinational semiconductor company that designs and manufactures power electronics, automotive, industrial, and security semiconductor solutions.
Application
IR3447MTRPBF is a primary-side PWM controller used in switch‑mode power supplies. Typical application areas include:
- Offline AC‑DC power supplies (flyback/buck configurations) and adapters
- LED lighting drivers (constant-current regulation)
- Telecom/consumer electronics power modules and auxiliary supplies
- DC‑DC converters in computers, set‑top boxes, routers, and embedded systems
Note: It’s designed for high-efficiency SMPS applications and primary-side regulation.
- Offline AC‑DC power supplies (flyback/buck configurations) and adapters
- LED lighting drivers (constant-current regulation)
- Telecom/consumer electronics power modules and auxiliary supplies
- DC‑DC converters in computers, set‑top boxes, routers, and embedded systems
Note: It’s designed for high-efficiency SMPS applications and primary-side regulation.
Package
8-pin surface-mount package (SO-8), Pb-free. Tape-and-Reel (TR) packaging.
