LM3407MY/NOPB

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LM3407MY/NOPB is an efficient, high-speed analog switch-mode LED driver from Texas Instruments. It is designed for low-power DC/DC switching applications up to 4A, and is capable of delivering up to 30V of dynamic voltage headroom, enabling the driver to operate in a wide range of LED configurations. The device is capable of driving constant or pulse-width modulated (PWM) LED signals at frequencies up to 1MHz, to drive multiple LED strings or single LED strings with up to 10V LED forward voltage. Additionally, it provides LED overcurrent protection, undervoltage lockout (UVLO), and frequency-adjustable pulse-by-pulse current limit.

The LM3407MY/NOPB application field and working principle can be categorized as PMIC – LED Drivers. This high-speed, switch-mode efficiency allows for excellent illumination of the target scene, keeping the size of the driver to a minimum. Additionally, the simple user interface allows for improved heat dissipation, as there are no external heat sinks required, making it a great choice for outdoor applications.

The LM3407MY/NOPB has two channels of current source and sink control. One is a current sink and the other is a current source with adjustable current limit. The current limit setting of the source channel is adjusted via an external resistor. The output of the sink channel is connected directly to the LED string. LM3407MY/NOPB can be used to provide either a constant-current supply or a pulse-width modulated (PWM) supply to the LEDs.

The LM3407MY/NOPB is configured through two input pins: the Input Select (IN_SEL) pin and the Enable (EN) pin. The IN_SEL pin is used to determine the operating mode of the device, either constant-current or pulse-width modulation (PWM). When in constant-current mode, a control voltage is not required at the Output Select (OUT_SEL) pin. When in PWM mode, a control voltage is required at the OUT_SEL pin to select the PWM frequency.

Additionally, the LM3407MY/NOPB has the ability to provide LED over-current protection. LED over-current protection prevents the device from exceeding the peak LED current limit. This ensures that the device remains within the safe operating area and that no unexpected damage is done to the LED strings.

The LM3407MY/NOPB also provides undervoltage lockout (UVLO) to prevent the device from operating at improper power supply voltages. An undervoltage lockout is triggered when the input voltage drops below the valid voltage range and prevents the device from operating until the input voltage is restored.

Overall, the LM3407MY/NOPB is an efficient, high-speed analog switch-mode LED driver designed for low-power DC/DC switching applications up to 4A that is capable of providing LED over-current protection, undervoltage lockout (UVLO), pulse-width modulation (PWM) and frequency adjustable pulse-by-pulse current limit, making it a great choice for outdoor applications.

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