IS31FL3265B HIGH-VOLTAGE, 18-CHANNEL LED DRIVER August 2021 GENERAL DESCRIPTION FEATURES The IS31FL3265B is an LED driver with 18 high voltage 3V to 5.5V operating supply (40V) constant current channels. Each channel can be Output current capability and number of outputs: pulse width modulated (PWM) by 8 bits for smooth LED 60mA 18 outputs, tolerance voltage 40V brightness control. In addition, each channel has an 8-bit 12MHz SPI with automatic address increment output current control register which allows fine tuning of Programmable H/L logic: 1.4V/0.4V, 2.4V/0.6V the channel current for rich RGB color mixing, e.g., a Accurate Color Rendition pure white color LED application. The maximum output - 32 steps Global current adjust current of each channel is designed to be 60mA, which can be adjusted by one 32 steps global control register. - 8-bit Dot correction for each channel Proprietary algorithms are used in IS31FL3265B to - 8-bit PWM for each channel minimize audible noise caused by the MLCC decoupling Selectable PWM method (200Hz or 25kHz) capacitors. All registers can be programmed via 12MHz 256-Step group blink with frequency SPI interface. programmable from 24Hz to 10.66s and duty cycle from 0% to 99.6% The IS31FL3265B can be configured to a minimum current consumption mode by either pulling the SDB pin Clock IO pin for multi-chip synchronization low or by using the software shutdown feature. Fault report (open detect/thermal roll off /thermal shutdown) The IS31FL3265B is available in eTSSOP-28 package. It Thermal roll-off programmable set point operates from 3.0V to 5.5V over the temperature range SDB rising edge resets SPI interface of -40C to +125C. EMI reduction technology - Spread spectrum APPLICATIONS - Selectable 9 phase delay LED in white goods application Operating temperature range, -40C ~ +125C Smart home devices Package: eTSSOP-28 Current accuracy (All output on) - Bit to bit: < 4% - Device to device: < 6% Lumissil Microsystems www.lumissil.com 1 Rev.C, 08/07/2021 IS31FL3265B TYPICAL APPLICATION CIRCUIT *Note 1 5V 28 VCC *Note 2 V =12V 1 F0.1 F LED+ 6 200R *Note 1 OUT1 *Note 1 5V 7 82R OUT2 5V 100k 8 82R 5 OUT3 INTB 3 MOSI 4 SCK Micro IS31FL3265B 2 Controller MISO 1 CS 200R 26 21 SDB OUT16 82R 22 100k 0.1F OUT17 82R 25 23 *Note 3 ISET OUT18 RISET 20k 24 27 GND CLKIO Figure 1 Typical Application Circuit Note 1: VIH is the high level voltage for IS31FL3265Bs INTB, which is usually same as VCC pin and VCC of Micro Controller, e.g. if VCC of Micro Controller is 3.3V, VCC(IS31FL3265B)=VIH=3.3V, if VCC of Micro Controller is 5V, VCC(IS31FL3265B)=VIH=5V, but VCC(IS31FL3265B) should not be lower than 3V. 2 Note 2: These resistors are for offloading the thermal dissipation (I R) away from the IS31FL3265B. Note 3: The maximum global output current is set by external resistor, R . Please refer to the application information in R section. ISET ISET Lumissil Microsystems www.lumissil.com 2 Rev.C, 08/07/2021