LX1993CDU

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The LX1993CDU is a current-mode, high-efficiency and high-current, pulsewidth-modulated (PWM) LED Driver. It is designed to provide constant, adjustable output current from a wide range of input supply voltages. The LX1993CDU is a PMIC - LED Drivers device that offers excellent line, load, and temperature stability.

The LX1993CDU provides these features:

• Input voltage range of 4.5V to 24V
• Efficiency up to 95%
• Output current up to 0.7A
• 60V Maximum output voltage
• Low ripple current
• Built-in UVLO (Under Voltage Lock Out)
• External current limit option

The LX1993CDU is well suited for driving LEDs in a variety of applications, including automotive exterior lighting applications, general purpose LED back-lighting, and other applications that require a high-efficiency and high-current LED Driver. The inexpensive components, an advanced current-mode control architecture, and an optimized external component design make the LX1993CDU an attractive device for cost sensitive applications.

The working principle of LX1993CDU is current-mode control. This type of control architecture allows for very fast response and more efficient operation than traditional voltage-mode control. The current-mode control is implemented with a PWM (Pulse Width Modulated) circuit, which distributes a constant output current. This constant output current is determined by the voltage on the FB pin (the error amplifier output). The input voltage is regulated by the external PWM driver that drives the gate of the Switching FET.

The LX1993CDU also includes an optional external current limit option. This option allows the user to limit the maximum current that can be delivered by the device to protect against surges in voltage. This provides a reliable solution for applications that require a higher level of safety.

The LX1993CDU also includes a built-in UVLO that prevents the device from supplying current if the input voltage drops below 4.5V. This ensures that the system remains safe from undervoltage conditions. In addition, the LX1993CDU is designed to be thermal shutdown protected. If the temperature of the device exceeds a certain maximum, the device will shut down, protecting the LED and other system components from potential thermal damage. The LX1993CDU is ESD protected and immune to Electrical Fast Transient (EFT) per the IEC 61000-4-4 standard.

The LX1993CDU is an ideal solution for applications that require reliable, high-current and high-efficiency LED Drivers. With its current-mode control architecture and its built-in protection features, the LX1993CDU provides a robust and cost-effective solution for these applications.

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