IS31FL3236-TQLS2 Model Information

Part Number

• IS31FL3236-TQLS2

General Description

The IS31FL3236 is a 36-channel LED driver with independent PWM control for each channel. It is designed to drive LEDs with a maximum output current of up to 38mA per channel, adjustable via an external resistor. The device supports 256-step PWM control for LED brightness modulation through an I2C interface. It is available in QFN-44 (5mm × 5mm) and eTQFP-48 packages and operates over a voltage range of 2.7V to 5.5V and a temperature range of -40°C to +85°C.

Features

• Supply Voltage Range: 2.7V to 5.5V
• I2C Interface: Supports automatic address increment function
• Internal Reset Register
• 256-Step PWM Control: Modulate LED brightness with 256 steps
• Independent Channel Control: Each channel can be controlled independently
• Current Scaling: Each channel can be scaled independently by factors of 1, 1/2, 1/3, and 1/4
• Temperature Range: -40°C to +85°C
• Package Options: QFN-44 (5mm × 5mm) and eTQFP-48

Applications

• Mobile Phones and Hand-Held Devices: For LED display
• Home Appliances: LED backlighting
• Wearable and Portable Devices
• Healthcare Applications

Pin Configuration

• QFN-44 and eTQFP-48 Packages: See datasheet for detailed pin layout
• Key Pins:OUT1 to OUT36: LED output channelsGND: GroundSDB: Shutdown pinAD: I2C address settingVCC: Power supplyR_EXT: External resistor input for global output current regulationSDA: I2C serial dataSCL: I2C serial clock

Electrical Characteristics

• Supply Voltage (VCC): 2.7V to 5.5V
• Maximum Global Output Current (IMAX): 38mA (with REXT = 2kΩ, SL = “00”)
• Output Current (IOUT): Up to 23mA (with REXT = 3.3kΩ, SL = “00”)
• Quiescent Power Supply Current (ICC): 9mA
• Shutdown Current (ISD): 2 to 5µA
• Output Leakage Current (IOZ): 0.2µA
• Output Voltage of R-EXT Pin (VEXT): 1.3V

I2C Interface

• 7-bit Slave Address: Configured via the AD pin
• Serial-Clock Frequency (fSCL): 400kHz
• Bus Free Time (tBUF): 1.3µs
• Data Hold Time (tHD, DAT): 0.9µs
• Data Setup Time (tSU, DAT): 100ns

Registers

• 00h Shutdown Register: Software shutdown mode control
• 01h to 24h PWM Registers: 256-step PWM duty cycle data for each channel
• 25h Update Register: Load PWM and LED control register data
• 26h to 49h LED Control Registers: Enable bit and current setting for each channel
• 4Ah Global Control Register: Enable all channels
• 4Fh Reset Register: Reset all registers to default values

Functional Block Diagram

• PWM Control: 256-step PWM control for LED brightness
• REXT: External resistor for global output current adjustment
• Current Setting: Independent current setting for each channel via LED control registers
• Gamma Correction: Recommended for visual LED breathing effect

Ordering Information

• Package: eTQFP-48, Lead-free
• Quantity: 250/Tray

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.3V to +6.0V
• Junction Temperature (TJMAX): 150°C
• Storage Temperature (TSTG): -65°C to +150°C
• Operating Temperature (TA): -40°C to +85°C
• Package Thermal Resistance (RθJA): 38.72°C/W (eTQFP)

Notes

• ESD Protection: ±8kV (HBM), ±1kV (CDM)
• Shutdown Mode: Reduces power consumption
• Gamma Correction: Use gamma-corrected PWM values for better visual effects