TLC5941PWPR

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The TLC5941PWPR is a low cost low noise constant current source digital PWM controller. It is a member of the Texas Instruments\' family of precision digital-output LED drivers and is classified as a PMIC - LED driver. This controller provides a high efficiency, low noise, and low heat dissipation solution for driving LEDs in multiple colors and high brightness levels.

The TLC5941PWPR is well-suited for many applications such as LED signs, automotive displays, instrumentation, and industrial control. These applications could include architectures having multiple colors and multiple LED channels. This LED driver can provide up to 12 bits of resolution for driving constant current LED sources with the precision of 10-bit analog-to-digital converters.

The maximum efficiency of this LED driver is attained when constant currents are driven into each LED. To reduce the total power dissipated in the LED, the TLC5941PWPR also supports a sleep mode, in which only one LED is driven and the others remain off. This low power supply (<800μA) LED driver consumes less than 200μA during normal operation with a wide input voltage range of 2.7V to 20V. The chip is essential in systems where the power and space is limited, as it is small-sized at 2.5mm*2.5mm and requires minimal external components.

The TLC5941PWPR delivers an optimized PWM signal for each LED channel, driven by a unique, proprietary low noise forward/reverse method. The PWM trace protocol is driven by an integrated 10-bit counter/comparator. This controller provides a separation of logic signals from the LEDs, allowing for lower noise output and improved performance. The linearity of the PWM control allows for a wide range of control, from basic blinking up to full dimming operations.

The TLC5941PWPR can be programmed for multiple channels in either PWM or constant current modes with a broad range of options. In PWM mode, frequency and pulse width can be user-configured with a single frequency adapted to individual LEDs in the system. In single color applications, users can define the channels\' order of dimming, while in multiple color applications, the user can define the channels\' priority order. Additionally, up to 8 devices can be connected in series, with power and data connections, eliminating the need for extra wiring and reducing the output current.

The TLC5941PWPR is designed to be a flexible, low noise, and low power solution for driving multiple LEDs with high efficiency. With its integrated 10-bit counter/comparator, sleep mode and low power consumption, this LED driver is ideal for applications that require multiple channels, but are limited in power, space and noise requirements.

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