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IS31FL3736-QFLS4-TR

IS31FL3736-QFLS4-TR

  • 厂商:

    LUMISSIL

  • 封装:

    WFQFN40_EP

  • 描述:

    LED 驱动器 IC 20 输出 线性 I²C 调光 45mA 40-QFN(5x5)

  • 数据手册
  • 价格&库存
IS31FL3736-QFLS4-TR 数据手册
IS31FL3736 12×8 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION July 2017 GENERAL DESCRIPTION FEATURES The IS31FL3736 is a general purpose 12×8 LEDs matrix driver with 1/12 cycle rate. The device can be programmed via an I2C compatible interface. Each LED can be dimmed individually with 8-bit PWM data which allowing 256 steps of linear dimming.      IS31FL3736 features 3 Auto Breathing Modes which are noted as ABM-1, ABM-2 and ABM-3. For each Auto Breathing Mode, there are 4 timing characters which include current rising / holding / falling / off time and 3 loop characters which include Loop-Beginning / Loop-Ending / Loop-Times. Every LED can be configured to be any Auto Breathing Mode or NoBreathing Mode individually.     Supply voltage range: 2.7V to 5.5V 8 current source outputs for row control 12 switch current inputs for column scan control Up to 96 LEDs (12×8) in dot matrix Programmable12×8 (32 RGBs) matrix size with de-ghost function 1MHz I2C-compatible interface Selectable 3 Auto Breath Modes for each dot Auto breath loop features interrupt pin inform MCU auto breath loop completed Auto breath offers 128 steps gamma current, interrupt and statelookup registers 256 steps global current setting Individual on/off control Individual 256 PWM control steps Individual Auto Breath Mode select Individual open and short error detect function Cascade for synchronization of chips QFN-40 (5mm×5mm) package Additionally each LED open and short state can be detected, IS31FL3736 store the open or short information in LED Open/Short Registers. The LED Open/Short Registers allowing MCU to read out via I2C compatible interface. Inform MCU whether there are LEDs open or short and the locations of open or short LEDs.        The IS31FL3736 operates from 2.7V to 5.5V and features a very low shutdown and operational current. APPLICATIONS IS31FL3736 is available in QFN-40 (5mm×5mm) package. It operates from 2.7V to 5.5V over the temperature range of -40°C to +125°C. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017    Mobile phones and other hand-held devices for LED display Gaming device (Keyboard, Mouse etc.) LED in white goods application 1 IS31FL3736 TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit (12×8) VCC 5V *Note 2 22 F 10V 17 PVCC VIO VIO/MCU 31 0.47 F 0.47 F 0.1 F 23 CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 PVCC 0.47 F 0.1 F 27 DVCC 28 AVCC CS8 CS7 0.47 F 0.1 F 25 24 L SW12 K SW11 VIO/MCU 100k 1k 33 34 Micro Controller J SW10 1k 37 38 39 100k 100k CS2 SDA SCL CS1 16 15 I SW9 H SW8 IS31FL3736 INTB SDB SW12 IICRST SW11 14 13 G SW7 F SW6 E SW5 32 30 35 REXT 20k 36 40 SW2 SYNC SW1 RSET 2 1 D SW4 C SW3 B SW2 ADDR1 ADDR2 PGND GND AGND 4,11 26 A SW1 1 2 3 4 5 6 7 8 Figure 2 Typical Application Circuit (RGB) Note 1: For the mobile applications the IC should be placed far away from the mobile antenna in order to prevent the EMI. Note 2: Electrolytic/Tantalum Capacitor may considerable for high current application to avoid audible noise interference.  Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 2 IS31FL3736 TYPICAL APPLICATION CIRCUIT (CONTINUED) VBattery VIO 100k 1k ADDR1 ADDR2 ADDR2 SCL INTB ADDR1 SCL ADDR2 ADDR1 ADDR2 SDA SDA SDA SDA SDA SDA SDA SCL SCL SCL SCL SCL SCL SCL INTB INTB SDB IICRST 100k 100k SDB SDB IICRST SYNC VBattery IICRST SDA 1k SDA Micro Controller ADDR1 SDB IICRST SYNC VBattery ADDR2 ADDR1 ADDR1 IICRST INTB SDB IICRST SDB IICRST SYNC Slave 1 SYNC ADDR2 IICRST SDB IICRST Master SYNC INTB VBattery SDB IICRST IICRST SYNC Slave 2 SYNC VBattery ADDR2 SDA IICRST IICRST SYNC ADDR2 ADDR1 SCL IICRST IICRST ADDR1 IICRST SDA SDA SDA SDA SDA SDA SDA SDA SCL SCL SCL SCL SCL SCL SCL SCL INTB SDB SDB INTB Slave 4 SDB SDB INTB Slave 5 SDB SDB Slave 3 INTB Slave 6 SDB SDB Slave 7 Figure 3 Typical Application Circuit (Eight Parts Synchronization-Work) Note 3: One part is configured as master mode, all the other 7 parts configured as slave mode. Work as master mode or slave mode specified by Configuration Register (Function register, address 00h).Master part output master clock, and all the other partswhich work as slave input this master clock. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 3 IS31FL3736 PIN CONFIGURATION 31 VIO 32 SYNC 33 SDA 34 SCL 35 ADDR1 36 ADDR2 37 INTB 38 SDB 26 AGND SW5 6 25 CS8 SW6 7 24 CS7 SW7 8 23 PVCC SW8 9 22 CS6 SW9 10 21 CS5 Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 NC 20 SW4 5 CS4 19 27 DVCC CS3 18 PGND 4 PVCC 17 28 AVCC CS2 16 SW3 3 CS1 15 29 NC SW12 14 SW2 2 SW11 13 30 RSET SW10 12 SW1 1 PGND 11 QFN-40 39 IICRST Pin Configuration (Top View) 40 GND Package 4 IS31FL3736 PIN DESCRIPTION No. Pin Description 1~3,5~10, 12~14 SW1~SW12 Switch pin for LED matrix scanning. 4,11 PGND Power GND. 15,16,18,19, 21,22,24,25 CS1~CS8 Current source. 17,23 PVCC Power for current source. 20,29 NC Not connected. 26 AGND Analog GND. 27 DVCC Power for digital circuits. 28 AVCC Power for analog circuits. 30 RSET Input terminal used to connect an external resistor. This regulates current source DC current value. 31 VIO Input logic reference voltage. 32 SYNC Synchronize pin. It is used for more than one part work synchronize. If it is not used please float this pin. 33 SDA I2C compatible serial data. 34 SCL I2C compatible serial clock. 35 ADDR1 I2C address setting. 36 ADDR2 I2C address setting. 37 INTB Interrupt output pin. Register F0h sets the function of the INTB pin and active low when the interrupt event happens. Can be NC (float) if interrupt function no used. 38 SDB Shutdown the chip when pull to low. 39 IICRST Reset I2C when pull high, need to pull down when normal operation. 40 GND Connect to GND. Thermal Pad Need to connect to GND pins. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 5 IS31FL3736 ORDERING INFORMATION Industrial Range: -40°C to +125°C Order Part No. Package QTY/Reel IS31FL3736-QFLS4-TR QFN-40, Lead-free 2500   Copyright  ©  2017  Lumissil  Microsystems.  All  rights  reserved.  Lumissil Microsystems reserves  the  right  to  make  changes  to  this  specification  and  its  products  at  any  time  without  notice.  Lumissil  Microsystems  assumes  no  liability  arising  out  of  the  application  or  use  of  any  information,  products  or  services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and  before placing orders for products.  Lumissil Microsystems does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can  reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use  in such applications unless Lumissil Microsystems receives written assurance to its satisfaction, that:  a.) the risk of injury or damage has been minimized;  b.) the user assume all such risks; and  c.) potential liability of Lumissil Microsystems is adequately protected under the circumstances  Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 6 IS31FL3736 ABSOLUTE MAXIMUM RATINGS Supply voltage, VCC Voltage at any input pin Maximum junction temperature,TJMAX Storage temperature range, TSTG Operating temperature range, TA=TJ Thermal resistance, junction to ambient, θJA ESD (HBM) ESD (CDM) -0.3V ~+6.0V -0.3V ~ VCC+0.3V +150°C -65°C ~+150°C -40°C ~ +125°C 24.96°C/W ±8kV ±1kV Note: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS The following specifications apply for VCC = 3.6V, TA = 25°C, unless otherwise noted. Symbol Max. Unit 5.5 V 1.3 2.0 mA VSDB=0V 2 5 VSDB=VCC, Configuration Register written “0000 0000” 2 5 39 42 45 mA 3.06 3.3 3.53 mA 170 250 Current source headroom voltage ISOURCE=42mA (Note 1) CS1~C8 150 250 tSCAN Period of scanning 128 µs tNOL Non-overlap blanking time during scan, the SWy and CSx are all off furring this time 8 µs VCC ICC/IQ Parameter Conditions Supply voltage Quiescent power supply current Typ. 2.7 VSDB=VCC, all LEDs off ISD Shutdown current IOUT Maximum constant current of CS1~CS8 RSET=20kΩ ILED Average current on each LED ILED = IOUT/12.75 RSET=20kΩ, GCC=255, PWM=255 Current sink headroom voltage SW1~SW12 ISINK=336mA (Note 1, 2) VHR Min. μA mV Logic Electrical Characteristics (SDA, SCL, ADDR1, ADDR2, SYNC, SDB) VIL Logic “0” input voltage VIO=3.6V GND 0.2VIO V VIH Logic “1” input voltage VIO=3.6V 0.75VIO VIO V VHYS Input Schmitt trigger hysteresis VIO=3.6V VOL Logic “0” output voltage for SYNC IOL = 8mA VOH Logic “1” output voltage for SYNC IOH = 8mA 0.2 V 0.4 0.75VIO V V IIL Logic “0” input current VINPUT = 0V (Note 3) 5 nA IIH Logic “1” input current VINPUT = VIO (Note 3) 5 nA Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 7 IS31FL3736 DIGITAL INPUT SWITCHING CHARACTERISTICS (NOTE 3) Symbol Parameter fSCL Serial-clock frequency tBUF Bus free time between a STOP and a START condition Fast Mode Min. Typ. Fast Mode Plus Max. Min. Typ. Max. Units - 400 - 1000 kHz 1.3 - 0.5 - μs tHD, STA Hold time (repeated) START condition 0.6 - 0.26 - μs tSU, STA Repeated START condition setup time 0.6 - 0.26 - μs tSU, STO STOP condition setup time 0.6 - 0.26 - μs tHD, DAT Data hold time - - - - μs tSU, DAT Data setup time 100 - 50 - ns tLOW SCL clock low period 1.3 - 0.5 - μs tHIGH SCL clock high period 0.7 - 0.26 - μs tR Rise time of both SDA and SCL signals, receiving - 300 - 120 ns tF Fall time of both SDA and SCL signals, receiving - 300 - 120 ns Note 1: In case of REXT = 20kΩ, Global Current Control Register (PG3, 01h) written “1111 1111”, GCC = “1111 1111”. Note 2: All LEDs are on and PWM=“1111 1111”, GCC = “1111 1111”. Note 3: Guaranteed by design. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 8 IS31FL3736 FUNCTIONAL BLOCK DIAGRAM Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 9 IS31FL3736 DETAILED DESCRIPTION I2C INTERFACE The IS31FL3736 uses a serial bus, which conforms to the I2C protocol, to control the chip’s functions with two wires: SCL and SDA. The IS31FL3736 has a 7-bit slave address (A7:A1), followed by the R/W bit, A0. Set A0 to “0” for a write command and set A0 to “1” for a read command. The value of bits A1 and A2 are decided by the connection of the ADDR1 pin. The value of bits A3 and A4 are decided by the connection of the ADDR2 pin. The complete slave address is: Table 1 Slave Address: ADDR2 ADDR1 GND GND GND GND SCL SCL SCL SCL SDA SDA SDA SDA VCC VCC VCC VCC GND SCL SDA VCC GND SCL SDA VCC GND SCL SDA VCC GND SCL SDA VCC A7:A5 A4:A3 A2:A1 101 00 00 00 00 01 01 01 01 10 10 10 10 11 11 11 11 00 01 10 11 00 01 10 11 00 01 10 11 00 01 10 11 A0 The 8-bit chip address is sent next, most significant bit first. Each address bit must be stable while the SCL level is high. After the last bit of the chip address is sent, the master checks for the IS31FL3736’s acknowledge. The master releases the SDA line high (through a pull-up resistor). Then the master sends an SCL pulse. If the IS31FL3736 has received the address correctly, then it holds the SDA line low during the SCL pulse. If the SDA line is not low, then the master should send a “STOP” signal (discussed later) and abort the transfer. Following acknowledge of IS31FL3736, the register address byte is sent, most significant bit first. IS31FL3736must generate another acknowledge indicating that the register address has been received. Then 8-bit of data byte are sent next, most significant bit first. Each data bit should be valid while the SCL level is stable high. After the data byte is sent, the IS31FL3736 must generate another acknowledge to indicate that the data was received. 0/1 ADDR1/2 connected to GND, (A2:A1)/(A4:A3)=00; ADDR1/2 connected to VCC, (A2:A1)/(A4:A3)=11; ADDR1/2 connected to SCL, (A2:A1)/(A4:A3)=01; ADDR1/2 connected to SDA, (A2:A1)/(A4:A3)=10; The SCL line is uni-directional. The SDA line is bidirectional (open-collector) with a pull-up resistor (typically 1kΩ). The maximum clock frequency specified by the I2C standard is 1MHz. In this discussion, the master is the microcontroller and the slave is the IS31FL3736. The “STOP” signal ends the transfer. To signal “STOP”, the SDA signal goes high while the SCL signal is high. ADDRESS AUTO INCREMENT To write multiple bytes of data into IS31FL3736, load the address of the data register that the first data byte is intended for. During the IS31FL3736 acknowledge of receiving the data byte, the internal address pointer will increment by one. The next data byte sent to IS31FL3736 will be placed in the new address, and so on. The auto increment of the address will continue as long as data continues to be written to IS31FL3736 (Figure 7). READING OPERATION Register FEh, F1h, 18h~47h of Page 0 and 11h of Page 3 can be read. To read the FEh and F1h, after IIC start condition, the bus master must send the IS31FL3736 device ____ address with the R/W bit set to “0”, followed by the register address (FEh or F1h) which determines which register is accessed. Then restart I2C, the bus master should send the IS31FL3736 device address with the ____ The timing diagram for the I2C is shown in Figure 4. The SDA is latched in on the stable high level of the SCL. When there is no interface activity, the SDA line should be held high. The “START” signal is generated by lowering the SDAsignal while the SCL signal is high. The start signal will alert all devices attached to the I2C bus to check the incoming address against their own chip address. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 R/W bit set to “1”. Data from the register defined by the command byte is then sent from the IS31FL3736 to the master (Figure 8). To read the 18h~47h of Page 0 and 11h of Page 3, the FDh should write with 00h before follow the Figure 8 sequence to read the data, that means, when you want to read 18h~47h of Page 0 and 11h of Page 3, the FDh should point to Page 0 or Page 3 first and then you can read the data. 10 IS31FL3736 Figure 4 Interface timing Figure 5 Bit transfer Figure 6 Writing to IS31FL3736 (Typical) Figure 7 Writing to IS31FL3736 (Automatic address increment) Figure 8 Reading from IS31FL3736 Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 11 IS31FL3736 REGISTER DEFINITION-1 Address Name Function Table R/W Default 2 W 0000 0000 FDh Command Register Available Page 0 to Page 3 Registers FEh Command Register Write lock To lock/unlock Command Register 3 R/W F0h Interrupt Mask Register Configure the interrupt function 4 W F1h Interrupt Status Register Show the interrupt status 5 R 0000 0000   REGISTER CONTROL     Table 2 FDh Command Register (Write Only) Data Function 0000 0000 Point to Page 0 (PG0, LED Control Register is available) 0000 0001 Point to Page 1 (PG1, PWM Register is available) 0000 0010 Point to Page 2 (PG2, Auto Breath Mode Register is available) 0000 0011 Point to Page 3 (PG3, Function Register is available) Others Reserved Note: FDh is locked when power up, need to unlock this register before write command to it. See Table 3 for detail. TheCommand Register should be configured first after writing in the slave address to choose the available register. Then write data in the choosing register. Power up default state is “0000 0000”. For example, when write “0000 0001” in the Command Register (FDh), the data which writing after will be stored in the Auto breath mode Register. Write new data can configure other registers. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 12 IS31FL3736 Table 3 FEh Command Register Write Lock (Read/Write) Table 5 F1h Interrupt Status Register Bit D7:D0 Name CRWL Default 0000 0000 (FDh write disable) Bit D7:D5 Name - Default 000 D4 D3 D2 ABM3 ABM2 ABM1 0 0 0 D1 D0 SB OB 0 0 Show the interrupt status for IC. To select the PG0~PG3, need to unlock this register first, with the purpose to avoid misoperation of this register.When FEh is written with 0xC5, FDh is allowed to modify once, after the FDh is modified the FEh will reset to be 0x00 at once. ABM3 Auto Breath Mode 3 Finish Bit 0 ABM3 not finish 1 ABM3 finish ABM2 Auto Breath Mode 2 Finish Bit 0 ABM2 not finish 1 ABM2 finish CRWL Command Register Write Lock 0x00 FDh write disable 0xC5 FDh write enable once Table 4 F0h Interrupt Mask Register Bit D7:D4 D3 D2 D1 D0 Name - IAC IAB IS IO Default 0000 0 0 0 0 Configure the interrupt function for IC.   IAC Auto Clear Interrupt Bit 0 Interrupt could not auto clear 1 Interrupt auto clear when INTB stay low exceeds 8ms IAB 0 1 Auto Breath Interrupt Bit Disable auto breath loop finish interrupt Enable auto breath loop finish interrupt IS 0 1 Dot Short Interrupt Bit Disable dot short interrupt Enable dot short interrupt IO 0 1 Dot Open Interrupt Bit Disable dot open interrupt Enable dot open interrupt Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 ABM1 Auto Breath Mode 1 Finish Bit 0 ABM1 not finish 1 ABM1 finish SB 0 1 Short Bit No short Short happens OB 0 1 Open Bit No open Open happens 13 IS31FL3736 REGISTER DEFINITION-2 Address Name Function Table R/W Default PG0 (0x00): LED Control Register 00h ~ 17h LED On/Off Register Set on or off state for each LED 7 W 18h ~ 2Fh LED Open Register Store open state for each LED 8 R 30h ~ 47h LED Short Register Store short state for each LED 9 R Set PWM duty for LED 10 W 0000 0000 11 W xxxx xx00 0000 0000 PG1 (0x01): PWM Register 00h~BEh PWM Register PG2 (0x02): Auto Breath Mode Register 00h~BEh Auto Breath ModeRegister Set operating mode of each dot PG3 (0x03): Function Register 00h Configuration Register Configure the operation mode 13 W 01h Global Current Control Register Set the global current 14 W 02h Auto Breath Control Register 1 of ABM-1 Set fade in and hold time for breath function of ABM-1 15 W 03h Auto Breath Control Register 2 of ABM-1 Set the fade out and off time for breath function of ABM-1 16 W 04h Auto Breath Control Register 3 of ABM-1 Set loop characters of ABM-1 17 W 05h Auto Breath Control Register 4 of ABM-1 Set loop characters of ABM-1 18 W 06h Auto Breath Control Register 1 of ABM-2 Set fade in and hold time for breath function of ABM-2 15 W 07h Auto Breath Control Register 2 of ABM-2 Set the fade out and off time for breath function of ABM-2 16 W 08h Auto Breath Control Register 3 of ABM-2 Set loop characters of ABM-2 17 W 09h Auto Breath Control Register 4 of ABM-2 Set loop characters of ABM-2 18 W 0Ah Auto Breath Control Register 1 of ABM-3 Set fade in and hold time for breath function of ABM-3 15 W 0Bh Auto Breath Control Register 2 of ABM-3 Set the fade out and off time for breath function of ABM-3 16 W 0Ch Auto Breath Control Register 3 of ABM-3 Set loop characters of ABM-3 17 W 0Dh Auto Breath Control Register 4 of ABM-3 Set loop characters of ABM-3 18 W 0Eh Time Update Register Update the setting of 02h ~ 0Dh registers - W 0Fh SWy Pull-Up Resistor Selection Register Set the pull-up resistor for SWy 19 W 10h CSx Pull-Down Resistor Selection Register Set the pull-down resistor for CSx 20 W 11h Reset Register Reset all register to POR state - R Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 0000 0000 14 IS31FL3736 Table 6 Page 0 (PG0, 0x00): LED Control Register LED Location LED On/Off Register LED Open Register LED Short Register SW1(CS1~ CS4) SW1(CS5~ CS8) 00h 01h 18h 19h 30h 31h SW2(CS1~ CS4) SW2(CS5~ CS8) 02h 03h 1Ah 1Bh 32h 33h SW3(CS1~ CS4) SW3(CS5~ CS8) 04h 05h 1Ch 1Dh 34h 35h SW4(CS1~ CS4) SW4(CS5~ CS8) 06h 07h 1Eh 1Fh 36h 37h SW5(CS1~ CS4) SW5(CS5~ CS8) 08h 09h 20h 21h 38h 39h SW6(CS1~ CS4) SW6(CS5~ CS8) 0Ah 0Bh 22h 23h 3Ah 3Bh SW7(CS1~ CS4) SW7(CS5~ CS8) 0Ch 0Dh 24h 25h 3Ch 3Dh SW8(CS1~ CS4) SW8(CS5~ CS8) 0Eh 0Fh 26h 27h 3Eh 3Fh SW9(CS1~ CS4) SW9(CS5~ CS8) 10h 11h 28h 29h 40h 41h SW10(CS1~ CS4) SW10(CS5~ CS8) 12h 13h 2Ah 2Bh 42h 43h SW11(CS1~ CS4) SW11(CS5~ CS8) 14h 15h 2Ch 2Dh 44h 45h SW12(CS1~ CS4) SW12(CS5~ CS8) 16h 17h 2Eh 2Fh 46h 47h Table 7-1 00h, 02h, ... 16h LED On/Off Register (CS1~CS4) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - CCS4 - CCS3 - CCS2 - CCS1 Default 0 0 0 0 0 0 0 0 Table 7-2 01h, 03h, ... 17h LED On/Off Register (CS5~CS8) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - CCS8 - CCS7 - CCS6 - CCS5 Default 0 0 0 0 0 0 0 0 The LED On/Off Registers store the on or off state of each LED in the Matrix. For example, if 00h=0x01, SW1-CS1 will open, if 01h=0x01, SW1-CS5 will open. CX-Y 0 1 LED State Bit LED off LED on Table 8-1 18h, 1Ah, ... 2Eh LED Open Register (CS1~CS4) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - OP4 - OP3 - OP2 - OP1 Default 0 0 0 0 0 0 0 0 Table 8-2 19h, 1Bh, ... 2Fh LED Open Register (CS5~CS8) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - OP8 - OP7 - OP6 - OP5 Default 0 0 0 0 0 0 0 0 Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 The LED Open Registers store the open or normal state of each LED in the Matrix. For example, 18h store SW1-CS1's open or normal state, 19h store SW1-CS5's open or normal state. OPx 0 1 LED Open Bit LED normal LED open Table 9-1 30h, 32h, ... 46h LED Short Register (CS1~CS4) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - ST4 - ST3 - ST2 - ST1 Default 0 0 0 0 0 0 0 0 Table 9-2 31h, 33h, ... 47h LED Short Register (CS5~CS8) Bit D7 D6 D5 D4 D3 D2 D1 D0 Name - ST8 - ST7 - ST6 - ST5 Default 0 0 0 0 0 0 0 0 The LED Short Registers store the short or normal state of each LED in the Matrix. For example, 30h store SW1-CS1's short or normal state, 31h store SW1-CS5's short or normal state. STx 0 1 LED Short Bit LED normal LED short 15 IS31FL3736 Page 1 (PG1, 0x01): PWM Register Figure 9 PWM Register Where Duty is the duty cycle of SWy, Table 10 00h ~ BEh PWM Register Bit D7:D0 Name PWM Default 0000 0000 Duty  PWM  I OUT  Duty 256 PWM  7  D [n ]  2 n n 0 Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 (2) IOUT is the output current of CSx (x=1~8), Each dot has a byte to modulate the PWM duty in 256 steps. The value of the PWM Registers decides the average current of each LED noted ILED. ILED computed by Formula (1): I LED  128s 1 1   128s  8s 12 12.75 (1) IOUT  840 GCC  REXT 256 (3) GCC is the Global Current Control register (PG3, 01h) value and REXT is the external resistor of RSET pin. D[n] stands for the individual bit value, 1 or 0, in location n. For example: if D7:D0=10110101 (0xB5, 181), GCC=255. REXT=20kΩ (IOUT=42mA), I LED  20  22  24  25  27 1  I OUT   2 .34 mA 256 12 .75 16 IS31FL3736 Page 2 (PG2, 0x02): Auto Breath Mode Register Figure 10 Auto Breath Mode Selection Register Table 11 00h ~ BEh Auto Breath Mode Register Bit D7:D2 D1:D0 Name - ABMS Default - 00 The Auto Breath Mode Register sets operating mode of each dot. ABMS 00 01 10 11 Auto Breath Mode Selection Bit PWM control mode Select Auto Breath Mode 1 (ABM-1) Select Auto Breath Mode 2 (ABM-2) Select Auto Breath Mode 3 (ABM-3) Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 17 IS31FL3736 Table 12 Page 3 (PG3, 0x03): Function Register Register Name Function R/W 00h Configuration Register Configure the operation mode W 01h Global Current Control Register Set the global current W 02h Auto Breath Control Register 1 of ABM-1 Set fade in and hold time for breath function of ABM-1 W 03h Auto Breath Control Register 2 of ABM-1 Set the fade out and off time for breath function of ABM-1 W 04h Auto Breath Control Register 3 of ABM-1 Set loop characters of ABM-1 W 05h Auto Breath Control Register 4 of ABM-1 Set loop characters of ABM-1 W 06h Auto Breath Control Register 1 of ABM-2 Set fade in and hold time for breath function of ABM-2 W 07h Auto Breath Control Register 2 of ABM-2 Set the fade out and off time for breath function of ABM-2 W 08h Auto Breath Control Register 3 of ABM-2 Set loop characters of ABM-2 W 09h Auto Breath Control Register 4 of ABM-2 Set loop characters of ABM-2 W 0Ah Auto Breath Control Register 1 of ABM-3 Set fade in and hold time for breath function of ABM-3 W 0Bh Auto Breath Control Register 2 of ABM-3 Set the fade out and off time for breath function of ABM-3 W 0Ch Auto Breath Control Register 3 of ABM-3 Set loop characters of ABM-3 W 0Dh Auto Breath Control Register 4 of ABM-3 Set loop characters of ABM-3 W 0Eh Time Update Register Update the setting of 02h ~ 0Dh registers W 0Fh SWy Pull-Up Resistor Selection Register Set the pull-up resistor for SWy W 10h CSx Pull-Down Resistor Selection Register Set the pull-down resistor for CSx W 11h Reset Register Reset all register to POR state R Default 0000 0000   Table 13 00h Configuration Register Bit D7:D6 D5:D3 D2 D1 D0 Name SYNC - OSD B_EN SSD Default 00 000 0 0 0 The Configuration Register sets operating mode of IS31FL3736. When SYNC bits are set to “01”, the IS31FL3736 is configured as the master clock source and the SYNC pin will generate a clock signal distributed to the clock slave devices.To be configured as a clock slave deviceand accept an external clock input the slave device’s SYNC bits must be set to “10”. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 When OSD set high, open/short detection will be trigger once, the user could trigger OS detection again by set OSD from 0 to 1. When B_EN enable, those dots select working in ABM-x mode will start to run the pre-established timing. If it is disabled, all dots work in PWM mode following Figure 16 to enable the Auto Breath Mode. When SSD is “0”, IS31FL3736 works in software shutdown mode and to normal operate the SSD bit should set to “1”. 18 IS31FL3736 SYNC 00/11 01 10 Synchronize Configuration High Impedance Master Slave OSD 0 1 Open/Short Detection Enable Bit Disable open/short detection Enable open/short detection B_EN Auto Breath Enable 0 PWM Mode Enable 1 Auto Breath Mode Enable Software Shutdown Control Software shutdown Normal operation SSD 0 1 Table 14 01h Global Current Control Register Bit D7:D0 Name GCCx Default 0000 0000 The Global Current Control Register modulates all CSx (x=1~8) DC current which is noted as IOUT in 256 steps. IOUT is computed by the Formula (3): 840 GCC  I OUT  REXT 256 GCC  (3) T2 0000 0001 0010 0011 0100 0101 0110 0111 1000 Others T2 Setting 0s 0.21s 0.42s 0.84s 1.68s 3.36s 6.72s 13.44s 26.88s Unavailable Table 16 03h, 07h, 0Bh Auto Breath Control Register 2 of ABM-x Bit D7:D5 D4:D1 D0 Name T3 T4 - Default 000 0000 0 n n0 Where D[n] stands for the individual bit value, 1 or 0, in location n, REXT is the external resistor of RSET pin. For example: if D7:D0=10110101, IOUT  T1 Setting 0.21s 0.42s 0.84s 1.68s 3.36s 6.72s 13.44s 26.88s Auto Breath Control Register 2 set the T3&T4 time in Auto Breath Mode. 7  D[ n ]  2 T1 000 001 010 011 100 101 110 111 20  22  24  25  27 840  REXT 256 Table 15 02h, 06h, 0Ah Auto Breath Control Register 1 of ABM-x Bit D7:D5 D4:D1 D0 Name T1 T2 - Default 000 0000 0 Auto Breath Control Register 1 set the T1&T2 time in Auto Breath Mode. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 T3 000 001 010 011 100 101 110 111 T3 Setting 0.21s 0.42s 0.84s 1.68s 3.36s 6.72s 13.44s 26.88s T4 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 Others T4 Setting 0s 0.21s 0.42s 0.84s 1.68s 3.36s 6.72s 13.44s 26.88s 53.76s 107.52s Unavailable 19 IS31FL3736 Table 17 04h, 08h, 0Ch Auto Breath Control Register 3 of ABM-x Table 18 05h, 09h, 0Dh Auto Breath Control Register 4 of ABM-x Bit D7:D6 D5:D4 D3:D0 Bit D7:D0 Name LE LB LTA Name LTB Default 00 00 0000 Default 0000 0000 Total loop times= LTA×256 + LTB. For example, if LTA=2, LTB=100, the total loop times is 256×2+100=612 times. For the counting of breathing times, do follow Figure 16 to enable the Auto Breath Mode. If the loop start from T4, T4->T1->T2->T3(1)->T4->T1->T2->T3(2)->T4->T1>...and so on. If the loop not start from T4, Tx->T3(1) ->T4->T1->T2->T3(2)->T4-> T1->...and so on. If the loop ends at off state(End of T3), the LED will be off state at last. If the loop ends at on state(End of T1), the LED will run an extra T4&T1, which are not included in loop. LB 00 01 10 11 Loop Beginning Time Loop begin from T1 Loop begin from T2 Loop begin from T3 Loop begin from T4 LE 00 01 Loop End Time Loop end at off state (End of T3) Loop end at on state (End of T1) LTA 0000 0001 0010 … 1111 8-11 Bits Of Loop Times Endless loop 1 2 … 15 Total loop times= LTA×256+LTB. For example, if LTA=2, LTB=100, the total loop times is 256×2+100=612 times. LTB 0000 0000 0000 0001 0000 0010 … 1111 1111 0-7 Bits Of Loop Times Endless loop 1 2 … 255 0Eh Time Update Register (02h~0Dh) The data sent to the time registers (02h~0Dh) will be stored in temporary registers. A write operation of “0000 0000” data to the Time Update Register is required to update the registers (02h~0Dh). Please follow Figure 16 to enable the Auto Breath mode and update the time parameters. Table 19 0Fh SWy Pull-Up Resistor Selection Register Bit D7:D3 D2:D0 Name - PUR Default 00000 000 Set pull-up resistor for SWy. PUR 000 001 010 011 100 101 110 111 SWy Pull-up Resistor Selection Bit No pull-up resistor 0.5kΩ 1.0kΩ 2.0kΩ 4.0kΩ 8.0kΩ 16kΩ 32kΩ Figure 11 Auto Breathing Function Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 20 IS31FL3736 Table 20 10h CSx Pull-Down Resistor Selection Register Bit D7:D3 D2:D0 Name - PDR Default 00000 000 11h Reset Register Once user read the Reset Register, IS31FL3736 will reset all the IS31FL3736 registers to their default value. On initial power-up, the IS31FL3736 registers are reset to their default values for a blank display. Set the pull-down resistor for CSx. PDR 000 001 010 011 100 101 110 111 CSx Pull-down Resistor Selection Bit No pull-down resistor 0.5kΩ 1.0kΩ 2.0kΩ 4.0kΩ 8.0kΩ 16kΩ 32kΩ Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 21 IS31FL3736 APPLICATION INFORMATION SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 SW11 SW12 CS1 00h 10h 20h 30h 40h 50h 60h 70h 80h 90h A0h B0h 00h 0Eh 1Eh 2Eh 3Eh 4Eh 5Eh 6Eh 7Eh 8Eh 9Eh AEh BEh 0Eh CS8 tSCAN=128µs tNOL=8µs Scanning cycle T=1.632ms((128+8)×12) De-Ghost time PWM Duty is variable from 0/256~255/256 IOUT=840/REXT×GCC/256 (GCC=0~255) Figure 12 Scanning Timing SCANING TIMING PWM CONTROL As shown in Figure 12, the SW1~SW12 is turned on by serial, LED is driven 8 by 8 within the SWy (y=1~12) on time (SWy, y=1~12) is sink and pull low when LED on) , including the non-overlap blanking time during scan, the duty cycle of SWy (active low, y=1~12) is: After setting the IOUT and GCC, the brightness of each LEDs (LED average current (ILED)) can be modulated with 256 steps by PWM Register, as described in Formula (1). 128s 1 1 Duty    128s  8s 12 12.75 (2) Where 128μs is tSCAN, the period of scanning and 8μs is tNOL, the non-overlap time. EXTERNAL RESISTOR (REXT) The output current for each CSx can be can be set by a single external resistor, REXT, as described in Formula (3). 840 GCC  I OUT  REXT 256 (3) I LED  PWM  I OUT  Duty 256 (1) Where PWM is PWM Registers (PG1, 00h~BFh) data showing in Table 10. For example, in Figure 1, REXT = 20kΩ,if PWM=255, and GCC=255, then I LED  255 840 255 1     3 .29 mA 256 20 k  256 12 .75 Writing new data continuously to the registers can modulate the brightness of the LEDs to achieve a breathing effect. GCC is Global Current Control Register (PG3, 01h) data showing in Table 14. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 22 IS31FL3736 LED AVERAGE CURRENT (ILED) As described in Formula (1), the LED average current (ILED) is effected by 3 factors: 1. REXT, resistor which is connected RSET pin and GND. REXT sets the current of all CSx (x=1~8) based on Formula (3). 2. Global Current Control Register (PG3, 01h). This register adjusts all CSx (x=1~8) output currents by 256 steps as shown in Formula (3). Choosing more gamma steps provides for a more continuous looking breathing effect. This is useful for very long breathing cycles. The recommended configuration is defined by the breath cycle T. When T=1s, choose 32 gamma steps, when T=2s, choose 64 gamma steps. The user must decide the final number of gamma steps not only by the LED itself, but also based on the visual performance of the finished product. Table 22 64 Gamma Steps with 256 PWM Steps 3. PWM Registers (PG1, 00h~BFh), every LED has an own PWM register. PWM Registers adjust individual LED average current by 256 steps as shown in Formula (1). C(0) C(1) C(2) C(3) C(4) C(5) C(6) C(7) 0 1 2 3 4 5 6 7 C(8) C(9) C(10) C(11) C(12) C(13) C(14) C(15) 8 10 12 14 16 18 20 22 GAMMA CORRECTION C(16) C(17) C(18) C(19) C(20) C(21) C(22) C(23) 24 26 29 32 35 38 41 44 C(24) C(25) C(26) C(27) C(28) C(29) C(30) C(31) 47 50 53 57 61 65 69 73 C(32) C(33) C(34) C(35) C(36) C(37) C(38) C(39) In order to perform a better visual LED breathing effect we recommend using a gamma corrected PWM value to set the LED intensity. This results in a reduced number of steps for the LED intensity setting, but causes the change in intensity to appear more linear to the human eye. Gamma correction, also known as gamma compression or encoding, is used to encode linear luminance to match the non-linear characteristics of display. Since the IS31FL3736 can modulate the brightness of the LEDs with 256 steps, a gamma correction function can be applied when computing each subsequent LED intensity setting such that the changes in brightness matches the human eye's brightness curve. 77 81 85 89 94 99 104 109 C(40) C(41) C(42) C(43) C(44) C(45) C(46) C(47) 114 119 124 129 134 140 146 152 C(48) C(49) C(50) C(51) C(52) C(53) C(54) C(55) 158 164 170 176 182 188 195 202 C(56) C(57) C(58) C(59) C(60) C(61) C(62) C(63) 209 216 223 230 237 244 251 255 256 224 Table 21 32 Gamma Steps with 256 PWM Steps 192 C(1) C(2) C(3) C(4) C(5) C(6) C(7) 0 1 2 4 6 10 13 18 C(8) C(9) C(10) C(11) C(12) C(13) C(14) C(15) 22 28 33 39 46 53 61 69 C(16) C(17) C(18) C(19) C(20) C(21) C(22) C(23) 64 78 86 96 106 116 126 138 149 32 C(24) C(25) C(26) C(27) C(28) C(29) C(30) C(31) 161 173 186 199 212 226 240 255 PWM Data C(0) 160 128 96 0 0 8 16 32 40 48 56 64 Intensity Steps 256 Figure 14 Gamma Correction (64 Steps) 224 Note: The data of 32 gamma steps is the standard value and the data of 64 gamma steps is the recommended value. 192 PWM Data 24 160 OPERATING MODE 128 96 Each dot of IS31FL3736 has twoselectable operating modes, PWM Mode and Auto Breath Mode. 64 PWM Mode 32 0 0 4 8 12 16 20 24 28 Intensity Steps Figure 13 Gamma Correction (32 Steps) Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 32 By setting the Auto Breath Mode Register bits of the Page 2 (PG2, 00h~BFh) to “00”, or disable the B_EN bit of Configure Register (PG3, 00h), the IS31FL3736 operates in PWM Mode.The brightness of each LED can be modulated with 256 steps by PWM registers. 23 IS31FL3736 For example, if the data in PWM Register is “0000 0100”, then the PWM is the fourth step. Writing new data continuously to the registers can modulate the brightness of the LEDs to achieve a breathing effect. Auto Breath Mode By setting the B_EN bit of the Configuration Register (PG3, 00h) to “1”, breath function enables. When set the B_EN bit to “0”, breath function disables. By setting the Auto Breath Mode Register bits of the Page 2 (PG2, 00h~BFh) to “01” (ABM-1), “10” (ABM-2) or“11” (ABM-3), the IS31FL3736 operates in Auto Breath Mode. IS31FL3736 has three auto breath modes, Auto Breath Mode 1, Auto Breath Mode 2 and Auto Breath Mode 3. Each ABM has T1, T2, T3 and T4, as shown below: OPEN/SHORT DETECT FUNCTION IS31FL3736 has open and short detect bit for each LED. By setting the OSD bit of the Configuration Register (PG3,00h) from "0" to “1”, the LED Open Register and LED Short Register will start to store the open/short information and after at least 2 scanning cycle (3.264ms) the MCU can get the open/short information by reading the 18h~2fh/30h~47h, for those dots are turned off via LED On/Off Registers (PG0, 00h~17h), the open/short data will not get refreshed when setting the OSD bit of the Configuration Register (PG3, 00h) from "0" to “1”. The Global Current Control Register (PG3, 01h) need to set to 0x01 in order to get the right open/short data. The detect action is one-off event and each time before reading out the open/short information, the OSD bit of the Configuration Register (PG3, 00h) need to be set from "0" to “1” (clear before set operation). INTERRUPT CONTROL Figure 15 Auto Breathing Function T1/T3 is variable from 0.21s to 26.88s, T2/T4 is variable from 0s to 26.88s, for each loop, the start point can be T1~T4 and the stop point can be on state (T2) and off state (T4), also the loop time can be set to 1~212 times or endless. Each LED can select ABM1~ABM-3 to work. The setting of ABM-1~ABM-3 (PG2, 02h~0Dh) need to write the 0Eh in PG3 to update before effective. IS31FL3736has an INTB pin, by setting the Interrupt Mask Register (F0h), it can be the flag of LED open, LED short or the finish flag of ABM-1, ABM-2, and ABM-3. For example, if the IO bit of the Interrupt Mask Register (F0h) set to “1”, when LED open happens, the INTB will pull be pulled low and the OB bit of Interrupt Status Register (F1h) will store open status at the same time. The INTB pin will be pulled high after reading the Interrupt Status Register (F1h) operation or it will be pulled high automatically after it stays low for 8ms (Typ.) if the IAC bit of Interrupt Mask Register (F0h) is set to “1”. The bits ofInterrupt Status Register (F1h) will be reset to “0” after INTB pin pulled high. SYNCHRONIZE FUNCTION SYNC bits of the Configuration Register (PG3, 00h) sets SYNC pin input or output synchronize clock signal. It is used for more than one part working synchronize. When SYNC bitsare set to “01”, SYNC pin output synchronize clock to synchronize other parts as master. When SYNC bitsare set to “10”, SYNC pin input synchronize clock and work synchronization with this input signal as slave. When SYNC bits are set to “00/11”, SYNC pin is high impedance, and synchronize function is disabled. SYNC bit default state is “00” and SYNC pin is high impedance when power up. Figure 16 Enable Auto Breath mode If not follow this flow, first loop’s start point may be wrong. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 24 IS31FL3736 DE-GHOST FUNCTION The “ghost” term is used to describe the behavior of an LED that should be OFF but instead glows dimly when another LED is turned ON. A ghosting effect typically can occur when multiplexing LEDs. In matrix architecture any parasitic capacitance found in the constant-current outputs or the PCB traces to the LEDs may provide sufficient current to dimly light an LED to create a ghosting effect. To prevent this LED ghost effect, the IS31FL3736 has integrated pull-up resistors for each SWy (y=1~12) and pull-down resistors for each CSx (x=1~8). Select the right SWy pull-up resistor (PG3, 0Fh) and CSx pulldown resistor (PG3, 10h) which eliminates the ghost LED for a particular matrix layout configuration. Typically, selecting the 32kΩ will be sufficient to eliminate the LED ghost phenomenon. The SWy pull-up resistors and CSx pull-down resistors are active only when the CSx/SWy outputs are in the OFF state and therefore no power is lost through these resistors. P3736=IPVCC×PVCC+ IQ×DVCC(AVCC)-IPVCC×VF(AVR) (4) ≈IPVCC×PVCC - IPVCC×VF(AVR) ≈IPVCC×(PVCC - VF(AVR)) Where IPVCC is the current of PVCC and VF(AVR) is the average forward of all the LED. For example, if REXT=20kΩ, GCC=255, PWM=255, PVCC=5V, VF(AVR)=3.5V@42mA, then the IPVCC=42mA×8×12/12.75=316.25mA. P3736=316.25mA×(5V-3.5V)=0.474W When operating the chip at high ambient temperatures, or when driving maximum load current, care must be taken to avoid exceeding the package power dissipation limits. The maximum power dissipation can be calculated using the following Equation (5): PD ( MAX )  PD ( MAX )  So, IIC RESET The IIC will be reset if the IICRST pin is pull-high, when normal operating the IIC bus, the IICRST pin need to keep low. By setting SSD bit of the Configuration Register (PG3, 00h) to “0”, the IS31FL3736 will operate in software shutdown mode. When the IS31FL3736 is in software shutdown, all current sources are switched off, so that the matrix is blanked. All registers can be operated. Typical current consume is 3μA. Hardware Shutdown 125 C  25 C  4W 24.96 C / W 5 QFN-40 Power Dissipation (W) Software Shutdown (5) Figure 17, shows the power derating of the IS31FL3736 on a JEDEC boards (in accordance with JESD 51-5 and JESD 51-7) standing in still air. SHUTDOWN MODE Shutdown mode can be used as a means of reducing power consumption. During shutdown mode all registers retain their data. 125C  25C RJA 4 3 2 1 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 The chip enters hardware shutdownwhen the SDB pin is pulled low. All analog circuits are disabled during hardware shutdown, typical the current consume is 3μA. LAYOUT The chip releases hardware shutdown when the SDB pin is pulled high. During hardware shutdown state Function Register can be operated. As described in external resistor (REXT), the chip consumes lots of power. Please consider below factors when layout the PCB. If VCC has risk drop below 1.75V but above 0.1V during SDB pulled low, please re-initialize all Function Registers before SDB pulled high. 1. The VCC (PVCC, DVCC, AVCC, VIO) capacitors need to close to the chip and the ground side should well connected to the GND of the chip. POWER DISSIPATION 2. REXT should be close to the chip and the ground side should well connect to the GND of the chip. The power dissipation of the IS31FL3736 can calculate as below: Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 Temperature (°C) Figure 17 Dissipation Curve 3. The thermal pad should connect to ground pins and the PCB should have the thermal pad too, usually this 25 IS31FL3736 pad should have 16 or 25 via thru the PCB to other side’s ground area to help radiate the heat. About the thermal pad size, please refer to the land pattern of each package. 4. The CSx pins maximum current is 42mA (REXT=20kΩ), and the SWy pins maximum current is 336mA (REXT=20kΩ), the width of the trace, SWy should have wider trace then CSx. 5. In the middle of SDA and SCL trace, a ground line is recommended to avoid the effect between these two lines. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 26 IS31FL3736 CLASSIFICATION REFLOW PROFILES Profile Feature Pb-Free Assembly Preheat & Soak Temperature min (Tsmin) Temperature max (Tsmax) Time (Tsmin to Tsmax) (ts) 150°C 200°C 60-120 seconds Average ramp-up rate (Tsmax to Tp) 3°C/second max. Liquidous temperature (TL) Time at liquidous (tL) 217°C 60-150 seconds Peak package body temperature (Tp)* Max 260°C Time (tp)** within 5°C of the specified classification temperature (Tc) Max 30 seconds Average ramp-down rate (Tp to Tsmax) 6°C/second max. Time 25°C to peak temperature 8 minutes max. Figure 18 Classification Profile Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 27 IS31FL3736 PACKAGE INFORMATION QFN-40 Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 28 IS31FL3736 RECOMMENDED LAND PATTERN QFN-40 Note: 1. Land pattern complies to IPC-7351. 2. All dimensions in MM. 3. This document (including dimensions, notes & specs) is a recommendation based on typical circuit board manufacturing parameters. Since land pattern design depends on many factors unknown (eg. user’s board manufacturing specs), user must determine suitability for use. Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 29 IS31FL3736 REVISION HISTORY Revision Detail Information Date 0A Initial release 2016.05.09 0B 1 Correct a spell mistake in page 1 2 Update figure 1 and figure 2 3 Update I2C READING OPERATION section and figure 8 2016.07.20 A Update EC table, add IOUT and VHR and limit, release to product 2016.08.01 B 1. Update READING OPERATION 2. Correct error of REGISTER DEFINITION-2 and Table 12 2017.01.12 C 1. Update POD 2. Update land pattern 2017.07.04   Lumissil Microsystems – www.lumissil.com Rev. C, 07/04/2017 30
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