The TL3845BDR-8 is a versatile Pulse Width Modulation (PWM) controller designed and manufactured by Texas Instruments, a leader in semiconductor solutions. This device is engineered to offer precise voltage control in power supply systems, making it an ideal choice for a wide range of applications including switch-mode power supplies, DC-DC converters, and battery management systems.

Key Features

• High Performance: The TL3845BDR-8 delivers high-frequency PWM operation up to 500 kHz, enabling the design of power supplies with excellent response times and reduced physical size due to smaller passive components.
• Enhanced Power Efficiency: With its integrated under-voltage lockout feature, the device ensures efficient power management by turning off the PWM operation when input voltage falls below a predefined threshold.
• Flexibility: The programmable soft-start function allows for a controlled build-up of output voltage, which helps prevent stress on the input power source during startup.
• Stability: The TL3845BDR-8 is equipped with an error amplifier that provides tight voltage regulation and stability across various load conditions.
• Protection: Built-in features such as overcurrent protection and thermal shutdown safeguard the device and the system it controls from potential damage due to fault conditions.

Applications

The TL3845BDR-8 is highly adaptable to a range of power control applications. Its compact SOIC-8 package makes it suitable for space-constrained designs while providing robust control for applications such as:

• AC-DC power supplies
• Isolated and non-isolated DC-DC converters
• LED drivers
• Battery chargers
• Power factor correction circuits

Technical Specifications

The device operates over a wide supply voltage range and features a low start-up current. It includes a 1.5-A peak output current capability and an internal oscillator that is trimmed to precise frequency control. The TL3845BDR-8 is also designed to work in both current-mode and voltage-mode PWM operations, providing designers with a flexible tool to meet their specific design requirements.