28 CHANNELS LED DRIVER EVALUATION BOARD GUIDE

Transcription

1 CHANNELS LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION ISFLA is comprised of constant current channels each with independent PWM control, designed for driving LEDs, PWM frequency can be khz or khz. The output current of each channel can be set at up to ma (Max.) by an external resistor and independently scaled by a factor of, /, / and /. The average LED current of each channel can be changed in steps by changing the PWM duty cycle through an IC interface. FEATURES.V to.v supply IC interface, automatic address increment function Internal reset register Modulate LED brightness with steps PWM Each channel can be controlled independently Each channel can be scaled independently by, /, / and / QFN- (mm mm) package QUICK START 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 ISFLA 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. ) If using external DC power supply connect the ground terminal of the power supply to the evaluation board's pin and the positive terminal to the pin. The evaluation board can also be powered via the Micro USB connector. ) Turn on the power supply or plug in the Micro-USB to the EVB 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 (K). Figure : Photo of ISFLA Evaluation Board EVALUATION BOARD OPERATION The evaluation board is controlled by LPC ( core). ISFLA evaluation board demonstrates the white LEDs mode and RGB modes by switching between modes when the K button is pressed. ) White LED Mode: White LEDs in three rows ( LEDs in each row) are light as raining effect. ) RGB Mode: Nine RGBs in the middle of the board will show color flowing effect. Note: ISFLA solely controls the FxLED function on the evaluation board. ORDERING INFORMATION Part No. Temperature Range Package ISFLA-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. C, //

2 CHANNELS LED DRIVER EVALUATION BOARD GUIDE SOFTWARE SUPPORT JP default setting is closed (jumper on). If it is open (no jumper), the on-board MCU will configure its own IC//AD pins to High Impedance status so an external source can driver the IC/ signals to control the ISFLA LED driver, the on-board MCU will also configure the U to open the VRGB and close the VLED. (Some early boards we provided still only open VLED) The AD pin is pulled high via R setting the device address of ISFLA to xe (xf for bit address format). Figure : Photo of Arduino UNO connected to Evaluation Board 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 ISFLA test firmware (sketch) from the ISSI website tml. ) Open JP. ) Connect the pins from Arduino board to ISFLA EVB: a) Arduino V pin to ISFLA EVB (TP). b) Arduino to ISFLA EVB (TP). c) Arduino (A) to ISFLA EVB. d) Arduino (A) to ISFLA EVB. e) If Arduino use.v MCU, connect.v to ISFLA 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 RGB LED brightness every second. Note: the white color LEDs cannot be controlled when the onboard LPC is disabled. (Some early board we provided is still controlling the white color LED) ) In EVB code, the AD pin is pulled low via P. of MCU, so the device address is x. When JP is open, the AD pin will be pulled high via R and the default ISFLA device address becomes xe (AD=, bit format is xf). If AD=H, the ISFLA address can be changed by connecting the AD in TP as follows: a) AD=, device address=x (bit format is xc). b) AD=, device address=xa (bit format is xd). c) AD=, device address=xc (bit format is xe). If AD= or low default, it may be pulled low by MCU in early version FW so it is fixed to and can t be modified. Please refer to the datasheet to get more information about ISFLA. Integrated Silicon Solution, Inc. Rev. C, //

3 CHANNELS LED DRIVER EVALUATION BOARD GUIDE Integrated Silicon Solution, Inc. Rev. C, // R.K R.K D D R.K.K R K R C.uF VLED P./ICB/DAC/AD P./OCD/AD P./CMP/KBI/AD P./OCC/AD P./OCB P./RST VSS P./XTAL P.XTAL/CLKOUT P./INT P./INT/ P./T/ P./MOSI P./MISO P./SS P./SPICLK P./RXD P./TXD P./T/KBI P./CMP/KBI VDD P./CMPREF/KBI P./CINA/KBI/DAC/AD P./CINB/KBI/AD P./CINA/KBI/AD P./CINB/KBI/AD P./OCA P./ICA U LPC PDA PCL RST.uF C.V AD INTB VLEDEN VRGBENB.V RST PDA PCL TP ICP nf C VDD SD BP VOUT U LDO uf C.V uf C AD K MODE AD VDD R_EXT 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 ISFLA R k R k R K R K S G S G D D D D U APM VRGBEN VLEDEN VLED VRGB 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 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 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 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 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 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 D D D D D D D D 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 AD JP OPEN=EXT CTRL Figure : ISFLA 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 ISFLA PMOS U Dual PMOS ANPEC APM LDO U Low-dropout Regulator SGMICRO SGM MCU U Microcontroller NXP LPC Diode D~D Diode, LED White, SMD Everlight -/BHC-ZLMRY/T Diode D~D Diode, LED RGB, SMD Everlight -/RGBC/TR Diode DS,DS Diode, SMD DIODES DFLS Resistor R,R, R,R RES,k,/W,±%,SMD R & R is for discharging the when switch mode Yageo RCJR-KL Resistor R,R,R RES,.k,/W,±%,SMD Yageo RCJR-KL Resistor R RES,k,/W,±%,SMD Yageo RCJR-KL Resistor R RES,.k,/W,±%,SMD Yageo RCJR-KL Resistor R NC Capacitor C CAP,µF,V,±%,SMD Yageo CCKKXRBB Capacitor C,C CAP,µF,V,±%,SMD Yageo CCKKXRBB Capacitor C,C CAP,.µF,V,±%,SMD Yageo CCKKXRBB Capacitor C CAP,nF,V,±%,SMD Yageo CCKKXRBB Button K Button SMD Connector DC IN Micro USB connector Bill of Materials, refer to Figure above. Integrated Silicon Solution, Inc. Rev. C, //

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

6 CHANNELS LED DRIVER EVALUATION BOARD GUIDE Integrated Silicon Solution, Inc. Rev. C, // 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

7 CHANNELS LED DRIVER EVALUATION BOARD GUIDE REVISION HISTORY Revision Detail Information Data R. Initial Release.. A Translate Page to English.. B. Update schematic and PCB.. Update bill of materials.. Add ISFLA option. Add Arduino control guide. AD pin description: EVB code: AD=, Ext control: AD=VDD(Via R).. C Remove ISFL description.. Integrated Silicon Solution, Inc. Rev. C, //

8 CHANNELS LED DRIVER EVALUATION BOARD GUIDE APPENDIX Ⅰ: ISFLA Arduino Test Code VA #include<wire.h> #include<avr/pgmspace.h> #define Addr_ xe//some early boards we provided the AD pin is set to low, so if you couldn t make it work, try x as well // bit format is xf //if AD is default low by MCU it can't be configured to other connection. 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 Init_FLA(); void loop() // put your main code here, to run repeatedly: ISFLA_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_FLA(void) uint_t i = ; for(i=xa;i<=x;i++) IS_IIC_WriteByte(Addr_,i,xff);//turn on all LED Integrated Silicon Solution, Inc. Rev. C, //

9 CHANNELS LED DRIVER EVALUATION BOARD GUIDE for(i=x;i<=x;i++) IS_IIC_WriteByte(Addr_,i,x);//write all PWM set x IS_IIC_WriteByte(Addr_,x,x);//update PWM&Control registers IS_IIC_WriteByte(Addr_,xB,x);//frequency setting KHz IS_IIC_WriteByte(Addr_,x,x);//normal operation void ISFLA_mode(void) uint_t i = ; int_t j = ; for(i=xd;i>=x;i-=)//b LED running IS_IIC_WriteByte(Addr_,i,xFF);//set PWM IS_IIC_WriteByte(Addr_,x,x);//update PWM&Control registers delay();//ms for(i=x;i<=x;i+=)//r LED running IS_IIC_WriteByte(Addr_,i,xFF);//set PWM IS_IIC_WriteByte(Addr_,x,x);//update PWM&Control registers delay();//ms for(i=xf;i>=x;i-=)//g LED running IS_IIC_WriteByte(Addr_,i,xFF);//set PWM IS_IIC_WriteByte(Addr_,x,x);//update PWM&Control registers delay();//ms for (j=;j>=;j--)//all LED breath falling for(i=x;i<x;i++) IS_IIC_WriteByte(Addr_,i,PWM_Gamma[j]);//set all PWM IS_IIC_WriteByte(Addr_,x,x);//update PWM&Control registers delay();//ms delay(); //keep on.s Integrated Silicon Solution, Inc. Rev. C, //