IS32LT3134 12-CHANNEL LED ANIMATION CONTROLLER GENERAL DESCRIPTION FEATURES Supply voltage range: 3.0V to 5.5V IS32LT3134 is a 12-channel LED driver with an UART interface operating at 19.2K supports dynamic embedded animation controller. Multiple IS32LT3134s addressing mode can be cascaded in the same board design. Four 12-channel push-pull outputs driver for common anode, animation patterns, pin-selectable, can be stored in the common cathode, or multiplexed LED drive modes embedded Flash of each device. The patterns are Duration of animation is from 0.1s up to 15s played by a host controlling the input pins of the devices. User programmable internal clock pre-scalar For each pattern, two modes can be pre-defined: Four pattern banks each with 12KB Flash cascade mode, one device after the other synchronous Watchdog timer to monitor valid clock signals and end of mode, all devices simultaneously. animation pattern Fault is asserted when errors IS32LT3134 is provided with a GUI on Windows detected by the WDT PC for design and playback of the animation patterns Animation end pin signaling the end of a synchronous when connected to a Lumissil evaluation board or a pattern for all devices, a start of animation of the next cascading device or the end of cascading pattern if its customer designed board with IS32LT3134. An In- asserted by the last device in the row. System-Programming (ISP) mode is provided for Support programmable duty cycle for dimming programming patterns into individual device when the Programmable clock frequency by deriving from 16MHz ISP pin is asserted. GUI also provides a tool to internal oscillator with automatically detect device position and assign device Clock input for external clock option address when more than one IS32LT3134s is on the WFQFN-24 package same board. APPLICATIONS A watchdog timer is used to check if the Taillight animation module with digital interface animation reaches the end of the pattern in anticipated time, if not a fault is generated. In addition, short circuit Interior light animation module with digital interface condition of the LED output is also detected. If any of the above fails, the Fault pin will be asserted. There are two options under the fault condition: one fails, all fail or one fails, others continue. The former would stop animation on all devices while the latter stop only the animation of the faulted IS32LT3431. IS32LT3134 is available in WFQFN-24 package. It operates from 3.0V to 5.5V over the temperature range of -40C to +125C. Lumissil Microsystems www.lumissil.com 1 Rev. 0A, 02/01/2021 IS32LT3134 TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit: four LT3134 cascading for control of 48 LEDs Note: 1. IC should be placed far away from the antenna in order to prevent the EMI. Lumissil Microsystems www.lumissil.com 2 Rev. 0A, 02/01/2021