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LM3478QMM
+Nomenclature-
FabricantTexas Instruments
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Pièce fabricant #LM3478QMM
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En stock25232
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Spécifications
| Attribut | Valeur |
| EU Ro HS | Not Compliant |
| ECCN (US) | EAR99 |
| Part Status | Unconfirmed |
| HTS | 8542.39.00.60 |
| Automotive | Yes |
| PPAP | Yes |
| Minimum Operating Temperature (°C) | -40 |
| Maximum Operating Temperature (°C) | 125 |
| Mounting Type | Surface Mount |
| Package Height | 0.95(Max) |
| Package Width | 3.1(Max) |
| Package Length | 3.1(Max) |
| PCB changed | 8 |
| Package / Case | SO |
| Supplier Device Package | VSSOP |
| Pin Count | 8 |
| Lead Shape | Gull-wing |
| Packaging | Tape and Reel |
| Number of Outputs | 1 |
| Topology | Step Up |
| Output Voltage (V) | 1.26 to 500 |
| Maximum Output Current (A) | 1 |
| Maximum Switching Frequency (k Hz) | 1000 |
| Minimum Input Voltage (V) | 2.97 |
| Maximum Input Voltage (V) | 40 |
| Operating Supply Voltage (V) | 2.97 to 40 |
| Maximum Supply Current (m A) | 2.7(Typ) |
| Minimum Switching Frequency (k Hz) | 100 |
| Supplier Temperature Grade | Automotive |
Présentation
Description
The LM3478QMM is a versatile high-efficiency current-mode PWM (Pulse Width Modulation) controller primarily designed for DC-DC conversion applications. Manufactured by Texas Instruments, it is utilized in boost, flyback, SEPIC, and other power conversion topologies. The device operates with a wide input voltage range of 2.97V to 40V, making it suitable for various applications, including automotive and industrial systems.
Key features include a programmable switching frequency up to 1 MHz, allowing for optimized performance and reduced component size. The LM3478QMM boasts a high-speed error amplifier and a wide bandwidth, providing precise control over output regulation. It includes a built-in current limiting feature and a UVLO (Under-Voltage Lockout) to protect the system during undesirable conditions.
Moreover, the controller enhances efficiency with a low shutdown current and an adjustable soft-start function to minimize inrush currents. The device is available in multiple package options, including the 8-pin VSSOP (MM) package, and it is designed to operate in a temperature range suitable for demanding environments.
Key features include a programmable switching frequency up to 1 MHz, allowing for optimized performance and reduced component size. The LM3478QMM boasts a high-speed error amplifier and a wide bandwidth, providing precise control over output regulation. It includes a built-in current limiting feature and a UVLO (Under-Voltage Lockout) to protect the system during undesirable conditions.
Moreover, the controller enhances efficiency with a low shutdown current and an adjustable soft-start function to minimize inrush currents. The device is available in multiple package options, including the 8-pin VSSOP (MM) package, and it is designed to operate in a temperature range suitable for demanding environments.
Equivalent
The LM3478QMM is a versatile high-efficiency switching regulator controller. Equivalent products include the LM3488, which has similar functionality and performance. Other alternatives might include the TPS40210 or MC34063 for basic applications. It's crucial to compare the specifications and ensure compatibility with your specific application requirements when considering a substitute. Always refer to the datasheets and confirm electrical characteristics, pin configurations, and package types to ensure proper functionality.
Features
The LM3478QMM is a versatile high-efficiency switching regulator controller. It supports various topologies, including boost, SEPIC, and flyback, making it suitable for a wide range of applications. Here are some key features:
1. Wide Input Voltage Range: Operates from 2.97V to 40V, accommodating a range of power sources.
2. High Switching Frequency: Allows for smaller external components, up to 1 MHz.
3. Internal Compensation: Simplifies design by reducing the need for external compensation components.
4. Adjustable Frequency: Offers flexibility in selecting the optimal frequency for efficiency and performance.
5. Low Shutdown Current: Reduces power consumption in standby mode.
6. Overvoltage Protection: Safeguards the device and connected components from voltage spikes.
7. Thermal Shutdown: Protects the device from overheating by shutting it down when necessary.
8. Soft Start Capability: Ensures a controlled ramp-up of output voltage to prevent inrush current.
9. Current Mode Control: Provides excellent line and load regulation.
These features make the LM3478QMM suitable for automotive, industrial, and consumer electronics applications.
1. Wide Input Voltage Range: Operates from 2.97V to 40V, accommodating a range of power sources.
2. High Switching Frequency: Allows for smaller external components, up to 1 MHz.
3. Internal Compensation: Simplifies design by reducing the need for external compensation components.
4. Adjustable Frequency: Offers flexibility in selecting the optimal frequency for efficiency and performance.
5. Low Shutdown Current: Reduces power consumption in standby mode.
6. Overvoltage Protection: Safeguards the device and connected components from voltage spikes.
7. Thermal Shutdown: Protects the device from overheating by shutting it down when necessary.
8. Soft Start Capability: Ensures a controlled ramp-up of output voltage to prevent inrush current.
9. Current Mode Control: Provides excellent line and load regulation.
These features make the LM3478QMM suitable for automotive, industrial, and consumer electronics applications.
Pinout
The LM3478QMM is a high-efficiency, low-side N-channel MOSFET controller for switching regulators, typically used in boost, SEPIC, and flyback converter applications. It is designed to provide a compact and efficient solution for powering various systems.
The LM3478QMM is available in an 8-pin MSOP (Mini Small Outline Package) package. Here is a brief overview of its pin functions:
1. COMP (Pin 1): Compensation pin used for frequency compensation of the regulator.
2. FB (Pin 2): Feedback pin used to set the output voltage by connecting a resistor divider network from the output.
3. AGND (Pin 3): Analog ground pin for the IC.
4. SW (Pin 4): Switch pin connected to the drain of the external N-channel MOSFET.
5. ISEN (Pin 5): Current sense pin used for current mode control by sensing the voltage across a sense resistor.
6. UVLO (Pin 6): Undervoltage lockout pin used to turn the regulator off at low input voltages.
7. VCC (Pin 7): Power supply pin for the IC.
8. GATE (Pin 8): Gate drive pin for the external N-channel MOSFET.
This configuration allows the LM3478QMM to control the output voltage and current effectively in power supply applications.
The LM3478QMM is available in an 8-pin MSOP (Mini Small Outline Package) package. Here is a brief overview of its pin functions:
1. COMP (Pin 1): Compensation pin used for frequency compensation of the regulator.
2. FB (Pin 2): Feedback pin used to set the output voltage by connecting a resistor divider network from the output.
3. AGND (Pin 3): Analog ground pin for the IC.
4. SW (Pin 4): Switch pin connected to the drain of the external N-channel MOSFET.
5. ISEN (Pin 5): Current sense pin used for current mode control by sensing the voltage across a sense resistor.
6. UVLO (Pin 6): Undervoltage lockout pin used to turn the regulator off at low input voltages.
7. VCC (Pin 7): Power supply pin for the IC.
8. GATE (Pin 8): Gate drive pin for the external N-channel MOSFET.
This configuration allows the LM3478QMM to control the output voltage and current effectively in power supply applications.
Manufacturer
The LM3478QMM is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. TI is known for its innovation in analog and embedded processing technologies and serves various industries, including automotive, industrial, personal electronics, and communications equipment.
Application
The LM3478QMM is a versatile wide input range N-channel MOSFET controller used in various DC-DC power conversion applications. Key application areas include:
1. Boost Converters: Enhancing voltage levels for devices requiring higher input voltages.
2. Flyback Converters: Used in isolated power supply applications.
3. SEPIC Converters: Supporting applications needing a positive output voltage from an input that can be above, below, or equal to the output.
4. Inverting Converters: Creating negative output voltages from positive inputs.
5. Automotive Power Supplies: Suitable for automotive systems due to its ability to handle wide input voltage ranges.
6. Industrial Power Systems: Efficient in powering various industrial electronics.
These applications benefit from its high efficiency, reliability, and flexibility.
1. Boost Converters: Enhancing voltage levels for devices requiring higher input voltages.
2. Flyback Converters: Used in isolated power supply applications.
3. SEPIC Converters: Supporting applications needing a positive output voltage from an input that can be above, below, or equal to the output.
4. Inverting Converters: Creating negative output voltages from positive inputs.
5. Automotive Power Supplies: Suitable for automotive systems due to its ability to handle wide input voltage ranges.
6. Industrial Power Systems: Efficient in powering various industrial electronics.
These applications benefit from its high efficiency, reliability, and flexibility.
Package
The LM3478QMM is a high-efficiency, low-side N-channel MOSFET controller for switching regulators. It typically comes in a VSSOP (Very Thin Shrink Small Outline Package) with 10 pins. This package type is compact, suitable for space-constrained applications, and designed to facilitate easy handling and soldering in manufacturing processes.
