36 CHANNELS LED DRIVER EVALUATION BOARD GUIDE

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1 CHANNELS LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION ISFL is an LED driver with constant current channels. Each channel can be pulse width modulated (PWM) by bits for smooth LED brightness control. In addition, each channel has an -bit output current control register which allows fine tuning the current for rich RGB color mixing, e.g., a pure white color LED application. The maximum output current of each channel is designed to be ma, which can be adjusted by one -bit global control register. Proprietary programmable algorithms are used in ISFL to minimize audible noise caused by the MLCC decoupling capacitor. All registers can be programmed via a high speed IC (MHz). FEATURES.V to.v supply Pin to pin with ISFL/ISFLA (QFN-, mm mm) MHz IC interface, automatic address increment function with readout function Four selectable IC addresses Modulate LED brightness with /// steps PWM method Modulate LED DC current with method Global analog global current control PWM frequency selectable Open short detect function Temperature detect function Spread spectrum QFN- (mm mm) package QUICK START Figure : Photo of ISFL Evaluation Board RECOMMENDED EQUIPMENT.V, A power supply ABSOLUTE MAXIMUM RATINGS.V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE The ISFL evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. ) Connect the ground terminal of the power supply to the and the positive terminal to the. Or connect the DC power to the connector (DC IN) (From version VC the DC in is replaced by a Micro-USB power in.). ) Turn on the power supply and pay attention to the supply current. If the current exceeds.a, please check for circuit fault. ) Enter the desired mode of display by toggling the MODE button. ORDERING INFORMATION Part No. Temperature Range Package ISFL-QFLS-EB - C to + C (Industrial) QFN-, Lead-free Table : Ordering Information For pricing, delivery, and ordering information, please contacts ISSI s analog marketing team at analog@issi.com or () -. Integrated Silicon Solution, Inc. Rev. A, //

2 CHANNELS LED DRIVER EVALUATION BOARD GUIDE EVALUATION BOARD OPERATION The ISFL evaluation board has six display modes. Press MODE button to switch configurations. ) (Default mode) The RGB LEDs in the middle of the bard show a color changing light bar moving pattern. ) Two groups of blue LED on above display a tailing effect move from right to left. ) Two groups of blue LED on above display a tailing effect move in opposite directions. ) Blue LED on above perform timer display. ) Two groups of blue LED on above flash together from two sides to middle and then turn off slowly from both sides to middle. ) The blue LEDs on above are put into four digits and to show a twist effect. Note: ISFL solely controls the FxLED function on the evaluation board. SOFTWARE SUPPORT JP default setting is close circuit. If it is set to open, the on-board MCU will stop working. The IC pins and pin are set to High Impedance. External IC and signals can be connected to TP to control the ISFL LED driver. The steps listed below are an example using the Arduino for external control. The Arduino hardware consists of an Atmel microcontroller with a bootloader allowing quick firmware updates. First download the latest Arduino Integrated Development Environment IDE (.. or greater) from Also download the Wire.h library from and verify that pgmspace.h is in the directory program Files(x)/Arduino/hardware/tools/avr/avr/include/avr /. Then download the latest ISFL test firmware (sketch) from the ISSI website ) Open JP. ) Connect the pins from Arduino board to ISFL EVB: a) Arduino V pin to ISFL EVB. b) Arduino to ISFL EVB. c) Arduino (A) to ISFL EVB. d) Arduino (A) to ISFL EVB. e) If Arduino use.v MCU, connect.v to ISFL EVB, if Arduino use.v MCU, connect.v to EVB. (Arduino UNO is.v, so =.V) ) Use the test code in appendix Ⅰ or download the test firmware (sketch) from the ISSI website, a.txt file and copy the code to Arduino IDE, compile and upload to Arduino. ) Run the Arduino code and the initial mode will change the Blue LED brightness every second. Note: the white color LEDs cannot be controlled when the onboard STMFCT is disabled. (Some early board we provided is still controlling the single color LED, if want to switch between single color LED and RGB, remove the U and connect the to the LED+) Please refer to the datasheet to get more information about ISFL. Figure : Photo of Arduino UNO connected to Evaluation Board Integrated Silicon Solution, Inc. Rev. A, //

3 CHANNELS LED DRIVER EVALUATION BOARD GUIDE Integrated Silicon Solution, Inc. Rev. A, // R.K R.K R K C uf OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT R K R K S G S G D D D D U APM VRGB nf C SD BP VOUT U LDO uf C uf C TP TP VRGB OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT INTB DIO CLK K OSCI OSCO VBAT PC-ANTI_TAMP PC-OSC_IN PC-OSC_OUT OSC_IN OSC_OUT NRST VSSA A PA-WKUP/ADC_IN/TIM_CH_ETR PA/ADC_IN/TIM_CH PA/USART_TX/ADC_IN/TIM_CH PA/USART_RX/ADC_IN/TIM_CH PA/SPI_NSS/ADC_IN PA/SPI_SCK/ADC_IN PA/SPI_MISO/ADC_IN/TIM_CH PA/SPI_MOSI/ADC_IN/TIM_CH PB/ADC_IN/TIM_CH PB/ADC_IN/TIM_CH PB/BOOT PB/IC_/USART_TX PB/IC_/USART_RX VSS PB/SPI_NSS/TIM_BKIN PB/SPI_SCK/TIM_CHN PB/SPI_MISO/TIM_CHN PB/SPI_MOSI/TIM_CHN PA/TIM_CH/MCO PA/USART_TX/TIM_CH PA/USART_RX/TIM_CH PA/CANRX/USBDM/TIM_CH PA/CANTX/USBDP/TIM_ETR PA/JTMS/SWDIO VSS PA/JTCK/SWCLK PA/JTDI PB/JTDO PB/JNTRST PB PB/IC_/TIM_CH PB/IC_/TIM_CH BOOT PB/TIM_CH PB/TIM_CH VSS U STMFCT BIT BIT PA R K C nf CS SCK MISO MOSI LEDR LEDB INTB D D D D D D D D D D D D P C P C OSCO OSCI OSCO OSCI Y M DS VUSB C uf ISSI +V D- D+ ID CON USB-P R R R R R.K D- D+ USB_DM USB_DP D- D+ USB_DM USB_DP MISO V MOSI V SCK CS TP MISO MOSI SCK CS PA D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D JP PA R K R K R.K DS OUT OUT R_EXT AD OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT U ISFL OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT TP Header CLK DIO BIT BIT TP TP Figure : ISFL Application Schematic

4 CHANNELS LED DRIVER EVALUATION BOARD GUIDE BILL OF MATERIALS Name Symbol Description Qty Supplier Part No. LED Driver U CH FxLED Driver ISSI ISFL LDO U Low-dropout Regulator PAM PAM MCU U Microcontroller STM STMFCT PMOS U Dual PMOS ANPEC APM Crystal Y Crystal, MHz JB HC-S Diode D~D Diode, LED Blue, SMD Everlight -/BHC-ZLMRY/T Diode D~D Diode, LED RGB, SMD Everlight -/RGBC/TR Diode DS, DS Diode, SMD DIODES DFLS Resistor R RES,.k,/W,±%,SMD Yageo RCJR-KL Resistor R~R RES,.k,/W,±%,SMD Yageo RCJR-KL Resistor R~R RES,k,/W,±%,SMD Yageo RCJR-KL Resistor R RES,k,/W,±%,SMD Yageo RCJR-KL Resistor R, R RES,R,/W,±%,SMD Yageo RCJR-RL Capacitor C CAP,nF,V,±%,SMD Yageo CCKKXRBB Capacitor C, C, C CAP, µf,v,±%,smd Yageo CCKKXRBB Capacitor C CAP,nF,V,±%,SMD Yageo CCKKXRBB Capacitor C, C CAP,pF,V,±%,SMD Yageo CCKKXRBB Capacitor C CAP,µF,V,±%,SMD Yageo CCKKXRBB Button K Button SMD Bill of Materials, refer to Figure above. Integrated Silicon Solution, Inc. Rev. A, //

5 CHANNELS LED DRIVER EVALUATION BOARD GUIDE Figure : Board Component Placement Guide - Top Layer Figure : Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. Rev. A, //

6 CHANNELS LED DRIVER EVALUATION BOARD GUIDE Figure : Board Component Placement Guide - Bottom Layer Figure : Board PCB Layout - Bottom Layer Copyright Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI 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. Integrated Silicon Solution, Inc. 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 Integrated Silicon Solution, Inc. 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 Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. Rev. A, //

7 CHANNELS LED DRIVER EVALUATION BOARD GUIDE REVISION HISTORY Revision Detail Information Data A Initial Release.. Integrated Silicon Solution, Inc. Rev. A, //

8 CHANNELS LED DRIVER EVALUATION BOARD GUIDE APPENDIX Ⅰ: ISFL Arduino Test Code VA #include<wire.h> #include<avr/pgmspace.h> #define Addr_ x // bit format is xf byte PWM_Gamma[]= x,x,x,x,x,x,x,x, x,x,xb,xd,xf,x,x,x, xa,xc,xd,xf,x,x,x,xe, x,x,xc,x,x,x,xb,xf, x,xa,xf,x,x,xd,x,x, xd,x,x,xd,x,xa,xa,xa, xac,xb,xb,xbf,xc,xcb,xcf,xd, xe,xe,xed,xf,xf,xfa,xfe,xff ; void setup() // put your setup code here, to run once: Wire.begin(); Wire.setClock();//IC khz // pinmode(,output);// // digitalwrite(,high);//_high //delay(); //keep.s Init_FL(); void loop() // put your main code here, to run repeatedly: // delay(); ISFL_mode();//breath mode void IS_IIC_WriteByte(uint_t Dev_Add,uint_t Reg_Add,uint_t Reg_Dat) Wire.beginTransmission(Dev_Add/); Wire.write(Reg_Add); // sends regaddress Wire.write(Reg_Dat); // sends regaddress Wire.endTransmission(); // stop transmitting void Init_FL(void) uint_t i = ; for(i=xa;i<=xd;i++) IS_IIC_WriteByte(Addr_,i,xFF);//write all scaling IS_IIC_WriteByte(Addr_,xe,xff);//GCC IS_IIC_WriteByte(Addr_,x,x);//update PWM & congtrol registers IS_IIC_WriteByte(Addr_,x,x);//normal operation void ISFL_mode(void)//white LED uint_t i=,j=; for(j=;j<=;j++) for(i=x;i<=x;i=i+) IS_IIC_WriteByte(Addr_,i, PWM_Gamma[j]);//write all PWM set x IS_IIC_WriteByte(Addr_,x,x);//update PWM & congtrol registers delay(); //keep.s Integrated Silicon Solution, Inc. Rev. A, //