Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Bulk |
| ProductStatus | Obsolete |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive or Negative |
| Topology | Boost, Flyback, SEPIC |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 2.5V ~ 36V |
| Frequency-Switching | 300kHz, 50kHz ~ 1MHz |
| DutyCycle(Max) | 92% |
| SynchronousRectifier | No |
| ClockSync | Yes |
| ControlFeatures | Enable, Frequency Control |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 10-TFSOP, 10-MSOP (0.118, 3.00mm Width) |
Tổng quan
Description
The LTC1871EMS is a high-efficiency, current-mode boost, flyback, and SEPIC controller produced by Linear Technology (now part of Analog Devices). It is designed for applications requiring a wide input voltage range, making it suitable for automotive, industrial, and various portable systems. The controller operates with a 2.5V to 36V input voltage range and can handle outputs up to 60V.
Key features of the LTC1871EMS include constant-frequency operation, programmable frequency up to 1MHz, and a low shutdown current. It offers current-mode control, which simplifies loop compensation and provides excellent line and load transient response. The device includes programmable soft-start, overcurrent protection, and a wide duty cycle range, enhancing its flexibility for various power configurations.
Its compact MSOP package makes it suitable for space-constrained applications. The LTC1871EMS is known for its reliability, efficiency, and versatile design, ideal for designers looking to implement robust and efficient power conversion solutions in their systems.
Key features of the LTC1871EMS include constant-frequency operation, programmable frequency up to 1MHz, and a low shutdown current. It offers current-mode control, which simplifies loop compensation and provides excellent line and load transient response. The device includes programmable soft-start, overcurrent protection, and a wide duty cycle range, enhancing its flexibility for various power configurations.
Its compact MSOP package makes it suitable for space-constrained applications. The LTC1871EMS is known for its reliability, efficiency, and versatile design, ideal for designers looking to implement robust and efficient power conversion solutions in their systems.
Equivalent
The LTC1871EMS is a high-efficiency boost, flyback, and SEPIC controller. Equivalent products include:
1. LM3488 by Texas Instruments - a versatile low-side N-FET controller for boost, flyback, and SEPIC applications.
2. MAX1771 by Maxim Integrated - a high-efficiency, low quiescent current boost converter.
3. NCP3063 by ON Semiconductor - a switching regulator with flexible topology support.
These alternatives offer similar functionalities and can be used in various DC-DC conversion applications. Always verify specifications to ensure compatibility with your design requirements.
1. LM3488 by Texas Instruments - a versatile low-side N-FET controller for boost, flyback, and SEPIC applications.
2. MAX1771 by Maxim Integrated - a high-efficiency, low quiescent current boost converter.
3. NCP3063 by ON Semiconductor - a switching regulator with flexible topology support.
These alternatives offer similar functionalities and can be used in various DC-DC conversion applications. Always verify specifications to ensure compatibility with your design requirements.
Features
The LTC1871EMS is a high-performance, wide input range, current mode boost, flyback, and SEPIC controller. Key features include:
1. Wide Input Voltage Range: Supports input voltages from as low as 2.5V to as high as 36V, making it versatile for different power supply designs.
2. Output Voltage Flexibility: Capable of generating output voltages up to 60V.
3. Current Mode Control: Provides excellent line and load transient response with simple loop compensation.
4. Programmable Frequency: Allows frequency setting from 50kHz to 1MHz, enabling the optimization between efficiency and component size.
5. Low Quiescent Current: Ensures high efficiency at light loads.
6. Adjustable Soft-Start: Enables controlled ramp-up of output voltage.
7. Integrated Gate Driver: Can drive a high-side N-channel MOSFET.
8. Overvoltage and Overcurrent Protection: Enhances reliability by preventing damage to components.
9. Shutdown Mode: Includes a low-power shutdown feature to reduce power consumption when not in use.
These features make the LTC1871EMS suitable for a variety of power supply applications, including battery-powered systems and automotive electronics.
1. Wide Input Voltage Range: Supports input voltages from as low as 2.5V to as high as 36V, making it versatile for different power supply designs.
2. Output Voltage Flexibility: Capable of generating output voltages up to 60V.
3. Current Mode Control: Provides excellent line and load transient response with simple loop compensation.
4. Programmable Frequency: Allows frequency setting from 50kHz to 1MHz, enabling the optimization between efficiency and component size.
5. Low Quiescent Current: Ensures high efficiency at light loads.
6. Adjustable Soft-Start: Enables controlled ramp-up of output voltage.
7. Integrated Gate Driver: Can drive a high-side N-channel MOSFET.
8. Overvoltage and Overcurrent Protection: Enhances reliability by preventing damage to components.
9. Shutdown Mode: Includes a low-power shutdown feature to reduce power consumption when not in use.
These features make the LTC1871EMS suitable for a variety of power supply applications, including battery-powered systems and automotive electronics.
Pinout
The LTC1871EMS is a high-performance, adjustable frequency, current mode, boost, flyback, and SEPIC controller. It comes in an MSOP-10 package, which means it has 10 pins. Here’s a brief description of its pin functions:
1. VIN (Pin 1): Input voltage pin for the power supply.
2. SENSE (Pin 2): Input for the current sense resistor to monitor the current.
3. GND (Pin 3): Ground pin.
4. SW (Pin 4): Switch pin for connecting the inductor.
5. TG (Pin 5): Gate drive for an external N-channel MOSFET.
6. VC (Pin 6): Compensation pin for stabilizing the control loop.
7. FB (Pin 7): Feedback pin to receive the output voltage for regulation.
8. RT (Pin 8): Controls the switching frequency with an external resistor.
9. SHDN (Pin 9): Shutdown pin to enable/disable the device.
10. VCC (Pin 10): Supply pin for the internal circuitry of the controller.
These pins work together to control the power conversion process, making the LTC1871EMS suitable for various high-efficiency power supply applications.
1. VIN (Pin 1): Input voltage pin for the power supply.
2. SENSE (Pin 2): Input for the current sense resistor to monitor the current.
3. GND (Pin 3): Ground pin.
4. SW (Pin 4): Switch pin for connecting the inductor.
5. TG (Pin 5): Gate drive for an external N-channel MOSFET.
6. VC (Pin 6): Compensation pin for stabilizing the control loop.
7. FB (Pin 7): Feedback pin to receive the output voltage for regulation.
8. RT (Pin 8): Controls the switching frequency with an external resistor.
9. SHDN (Pin 9): Shutdown pin to enable/disable the device.
10. VCC (Pin 10): Supply pin for the internal circuitry of the controller.
These pins work together to control the power conversion process, making the LTC1871EMS suitable for various high-efficiency power supply applications.
Manufacturer
The LTC1871EMS is manufactured by Analog Devices, Inc. This company is a multinational semiconductor company specializing in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits. These products serve a wide range of applications, including industrial, automotive, consumer electronics, and communication sectors. Analog Devices is known for its high-performance analog technology, power management, data conversion, and signal processing solutions.
Application
The LTC1871EMS is a versatile DC/DC controller that is commonly used in applications requiring step-up (boost) conversion. Key application areas include:
1. Power Supply Design: Utilized in industrial and consumer electronics for generating higher voltages from lower voltage sources.
2. Battery-Powered Devices: Enhances battery voltage to power higher-voltage circuits, extending device functionality.
3. Automotive Electronics: Used in systems that require stable voltage conversion for sensitive components.
4. LED Drivers: Provides efficient voltage transformation for driving high-power LEDs.
5. Portable Devices: Supports power management in portable gadgets by efficiently converting battery voltage.
These applications leverage the LTC1871EMS’s high efficiency, wide input voltage range, and robustness.
1. Power Supply Design: Utilized in industrial and consumer electronics for generating higher voltages from lower voltage sources.
2. Battery-Powered Devices: Enhances battery voltage to power higher-voltage circuits, extending device functionality.
3. Automotive Electronics: Used in systems that require stable voltage conversion for sensitive components.
4. LED Drivers: Provides efficient voltage transformation for driving high-power LEDs.
5. Portable Devices: Supports power management in portable gadgets by efficiently converting battery voltage.
These applications leverage the LTC1871EMS’s high efficiency, wide input voltage range, and robustness.
Package
The LTC1871EMS is a DC/DC controller from Linear Technology (now part of Analog Devices) and comes in an MSOP (Mini Small Outline Package) type. Specifically, it's an 8-pin MSOP package, which is compact and suitable for applications requiring efficient space utilization on the circuit board.
