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TL3845BDR-8
IC REG CTRLR MULT TOPOLOGY 8SOIC
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規格
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Boost, Flyback, Forward Converter |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 7.6V ~ 30V |
| Frequency-Switching | 100kHz |
| DutyCycle(Max) | 48% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Frequency Control |
| OperatingTemperature | 0°C ~ 70°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
概述
Description
The TL3845BDR-8 is a high-performance current-mode PWM controller designed for efficient power conversion in applications such as switch-mode power supplies. It features a wide input voltage range, making it suitable for various power supply designs. Key characteristics of the TL3845BDR-8 include its ability to enhance power efficiency through precise duty cycle control and reduced switching losses.
The device integrates essential protection features such as overcurrent protection and undervoltage lockout, which safeguard the system against potential faults. It operates at a fixed frequency, optimizing it for noise-sensitive applications. The TL3845BDR-8's compact form factor and low power consumption make it ideal for use in space-constrained environments.
Overall, the TL3845BDR-8 is a reliable solution for designers looking to implement efficient and robust power management systems in electronic devices.
The device integrates essential protection features such as overcurrent protection and undervoltage lockout, which safeguard the system against potential faults. It operates at a fixed frequency, optimizing it for noise-sensitive applications. The TL3845BDR-8's compact form factor and low power consumption make it ideal for use in space-constrained environments.
Overall, the TL3845BDR-8 is a reliable solution for designers looking to implement efficient and robust power management systems in electronic devices.
Features
The TL3845BDR-8 is a fixed frequency current-mode PWM controller designed for off-line and DC-to-DC converter applications. Key features include:
1. Current-Mode Control: Facilitates simple loop compensation and improved transient response.
2. Wide Supply Voltage Range: Operates across various input voltages, enhancing versatility in different applications.
3. Low Start-up Current: Minimizes power consumption during start-up, improving overall efficiency.
4. Oscillator for Precise Frequency Control: Incorporates a trimmed oscillator for accurate control of the switching frequency.
5. Undervoltage Lockout (UVLO): Offers two levels of UVLO thresholds to enhance fault protection.
6. High-Current Totem-Pole Output: Provides rapid switching of power MOSFETs.
7. Short-Circuit Protection: Features cycle-by-cycle current limiting for enhanced safety and reliability.
8. Soft Start Capability: Provides controlled ramp-up of output voltage to prevent inrush current at start-up.
The TL3845BDR-8 is commonly used in power supply design, offering reliable performance for efficient power conversion. Its compact size in a surface-mount package also aids in high-density designs.
1. Current-Mode Control: Facilitates simple loop compensation and improved transient response.
2. Wide Supply Voltage Range: Operates across various input voltages, enhancing versatility in different applications.
3. Low Start-up Current: Minimizes power consumption during start-up, improving overall efficiency.
4. Oscillator for Precise Frequency Control: Incorporates a trimmed oscillator for accurate control of the switching frequency.
5. Undervoltage Lockout (UVLO): Offers two levels of UVLO thresholds to enhance fault protection.
6. High-Current Totem-Pole Output: Provides rapid switching of power MOSFETs.
7. Short-Circuit Protection: Features cycle-by-cycle current limiting for enhanced safety and reliability.
8. Soft Start Capability: Provides controlled ramp-up of output voltage to prevent inrush current at start-up.
The TL3845BDR-8 is commonly used in power supply design, offering reliable performance for efficient power conversion. Its compact size in a surface-mount package also aids in high-density designs.
Package
The TL3845BDR-8 is a PWM controller typically used in DC-DC converters. It comes in an 8-pin SOIC (Small Outline Integrated Circuit) package.
Pinout
The TL3845BDR-8 is an integrated circuit used for controlling switch-mode power supplies. It is an 8-pin device with the following pin functions:
1. Compensation (COMP): Error amplifier output. Used for loop compensation.
2. Voltage Feedback (VFB): Inverting input to the error amplifier. Used for voltage feedback.
3. Current Sense (CS): Monitors the switch current for current mode control and overcurrent protection.
4. RT/CT: Timing resistor and capacitor input for setting oscillator frequency.
5. Ground (GND): Ground reference for the IC.
6. Output (OUT): Provides the drive signal for the external power MOSFET.
7. VCC: Supply voltage input.
8. VREF: Reference voltage output. Provides a stable reference for internal circuits and can be used externally.
The TL3845BDR-8 is commonly used for PWM control in applications requiring high efficiency and reliability.
1. Compensation (COMP): Error amplifier output. Used for loop compensation.
2. Voltage Feedback (VFB): Inverting input to the error amplifier. Used for voltage feedback.
3. Current Sense (CS): Monitors the switch current for current mode control and overcurrent protection.
4. RT/CT: Timing resistor and capacitor input for setting oscillator frequency.
5. Ground (GND): Ground reference for the IC.
6. Output (OUT): Provides the drive signal for the external power MOSFET.
7. VCC: Supply voltage input.
8. VREF: Reference voltage output. Provides a stable reference for internal circuits and can be used externally.
The TL3845BDR-8 is commonly used for PWM control in applications requiring high efficiency and reliability.
Manufacturer
The TL3845BDR-8 is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components, including integrated circuits, microcontrollers, and sensors. The company serves various industries such as automotive, industrial, electronics, and communications, providing key components that enable advanced technologies in areas like power management, signal processing, and data conversion.
Application
The TL3845BDR-8 is a PWM controller used in various power management applications. It's commonly employed in DC-DC converters, off-line power supplies, and high-frequency switching power supplies. Its main application areas include consumer electronics, telecommunications equipment, industrial power control, and automotive power systems. The device is favored for its efficiency and performance in managing power conversion processes.
Equivalent
The TL3845BDR-8 is a current-mode PWM controller. Equivalent products include:
1. UC3845 - Texas Instruments
2. NCP3845 - ON Semiconductor
3. KA3845 - Fairchild Semiconductor (now part of ON Semiconductor)
4. MC3845 - STMicroelectronics
5. SG3845 - Microsemi
These alternatives offer similar functionality and are used in PWM control applications. Always verify specifications and compatibility with your application requirements.
1. UC3845 - Texas Instruments
2. NCP3845 - ON Semiconductor
3. KA3845 - Fairchild Semiconductor (now part of ON Semiconductor)
4. MC3845 - STMicroelectronics
5. SG3845 - Microsemi
These alternatives offer similar functionality and are used in PWM control applications. Always verify specifications and compatibility with your application requirements.
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