IS32FL3236A 36-CHANNEL LED DRIVER SELECTABLE PWM FREQUENCY October 2019 GENERAL DESCRIPTION FEATURES IS32FL3236A is comprised of 36 constant current 2.7V to 5.5V supply channels each with independent PWM control, I2C interface, automatic address increment designed for driving LEDs, PWM frequency can be function 3kHz or 22kHz. The output current of each channel Four selectable I2C addresses can be set at up to 38mA (Max.) by an external resistor Internal reset register and independently scaled by a factor of 1, 1/2, 1/3 and Modulate LED brightness with 256 steps PWM 1/4. The average LED current of each channel can be Each channel can be controlled independently changed in 256 steps by changing the PWM duty cycle through an I2C interface. Each channel can be scaled independently by 1, 1/2, 1/3 and 1/4 The chip can be turned off by pulling the SDB pin low or PWM frequency selectable by using the software shutdown feature to reduce - 3kHz (default) power consumption. - 22kHz IS32FL3236A is available in eTQFP-48 package. It -40C to +125C temperature range operates from 2.7V to 5.5V over the temperature range eTQFP-48 package of -40C to +125C. AEC-Q100 Qualified APPLICATIONS Auto display panel backlight Auto ambient light LED in auto appliances Lumissil Microsystems www.lumissil.com 1 Rev. A, 10/11/2019 IS32FL3236A TYPICAL APPLICATION CIRCUIT *Not e 1 *Not e 1 VBattery 41 VBattery VCC 47 40 OUT1 1 F AD 0.1 F 48 OUT2 *Not e 2 1 V OUT3 IH 4.7k 4.7k 45 SDA 46 Micro IS32FL3236A SCL Controller 39 SDB 36 100k 0.1 F OUT34 37 OUT35 44 ISET 38 OUT36 RISE T 3.3k 4,18 33,42,43 GND GND 19 Figure 1 Typical Application Circuit *Not e 1 *Not e 1 *Not e 3 5V 41 5V 33 VCC 47 40 OUT1 1 F AD 91 0.1 F 48 OUT2 *Not e 2 33 1 V OUT3 IH 4.7k 4.7k 45 SDA 46 Micro IS32FL3236A SCL Controller 39 SDB 33 36 100k 0.1 F OUT34 91 37 OUT35 44 33 ISET 38 OUT36 RISE T 3.3k 4,18 33,42,43 GND GND 19 Figure 2 Typical Application Circuit (V =5V) CC Note 1: V should be same as VCC voltage. LED+ Note 2: V is the high level voltage for IS32FL3236A, which is usually same as VCC of Micro Controller, e.g. if VCC of Micro Controller is 3.3V, IH V =3.3V. If V =5V and V is lower than 2.8V, recommend to add a level shift circuit. IH CC IH Note 3: These resistors are optional to help reduce the power of IS32FL3236A only (values are for V =5V). LED+ Note 4: The output current is set up to 23mA when R = 3.3k . The maximum global output current can be set by external resistor, R . ISET ISET Please refer to the detail application information in R section. ISET Note 5: The IC should be placed far away from the antenna in order to prevent the EMI. Lumissil Microsystems www.lumissil.com 2 Rev. A, 10/11/2019