IS31FL3265A HIGH-VOLTAGE, 18-CHANNEL LED DRIVER August 2021 GENERAL DESCRIPTION FEATURES The IS31FL3265A 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 1MHz I2C 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 pure Accurate Color Rendition white color LED application. The maximum output current - 32 steps Global current adjust 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 the IS31FL3265A 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 1MHz 256-Step group blinking with frequency I2C compatible interface. programmable from 24Hz to 10.66s and duty cycle from 0% to 99.6% The IS31FL3265A can be configured to a minimum current consumption mode by either pulling the SDB pin Clock IO pin for multi-chip blink synchronization low or by using the software shutdown feature. Fault report (open detect/thermal roll off /thermal shutdown) The IS31FL3265A is available in eTSSOP-28 package. It Thermal roll-off programmable set point operates from 2.7V to 5.5V over the temperature range SDB rising edge resets I2C 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. B, 07/06/2021 IS31FL3265A TYPICAL APPLICATION CIRCUIT *Note 1 5V 28 VCC *Note 2 V =12V LED+ 1 F0.1 F 200R 6 OUT1 1 82R ADDR1 7 *Note 1 2 OUT2 ADDR2 5V 8 82R *Note 1 OUT3 2k 2k 100k 5V 3 SDA 4 IS31FL3265A SCL Micro 5 Controller INTB 26 21 200R SDB OUT16 100k 0.1 F 22 82R OUT17 23 82R 25 OUT18 *Note 3 ISET RIS ET 20k 24 27 GND CLKIO Figure 1 Typical Application Circuit Note 1: VIH is the high level voltage for IS31FL3265As SDA, SCL and INTB, which is usually same as VCC pin and VCC of Micro Controller, e.g. if VCC of Micro Controller is 3.3V, VCC(IS31FL3265A)=V =3.3V if VCC of Micro Controller is 5V, VCC(IS31FL3265A)=V =5V, but IH IH VCC(IS31FL3265A) should not be lower than 3V. 2 Note 2: These resistors are for offloading the thermal dissipation (P=I R) away from the IS31FL3265A. Note 3: The maximum global output current is set by external resistor, R . Please refer to the application information in R section. ISET ISET Note 4: The IC and LED string should be placed far away from any local antenna in order to prevent EMI contamination. Lumissil Microsystems www.lumissil.com 2 Rev. B, 07/06/2021