STEVAL-ILL077V1 STMicroelectronics

S T E VA L - I L L 0 7 7 V 1 60 W, digital 3-LED channel evaluation board with STNRG388A- controlled current regulation and dimming Data brief Description The STEVAL-ILL077V1 evaluation board is a complete and configurable solution able to independently manage up to 3 LED channels using the features of the STNRG388A digital controller. The STNRG388A is a part of the STMicroelectronics STLUX product family and embeds advanced peripherals tailored to generate high resolution PWM signals (SMED). Every LED channel current is adjusted with a reverse buck converter that, via appropriate SMED peripheral configuration, can implement fixed off time and frequency fold back control techniques, for analogue (10 - 700 mA current Features range) and digital (50 - 700 mA current range) Based on the STNRG388A digital controller dimming modes, respectively. Up to 3 LED channels Current dimming can be managed via USB, using Maximum total output power: 60 W a PC GUI to send serial commands to the board, Maximum single LED channel output power: or via DALI interface to send protocol commands 30 W through the connected DALI master. Adjustable LED channel current: 10 - 700 mA Every LED channel can be configured through LED channel current setting resolution: 1 mA the same GUI to set certain parameters like Dimming mode programmable for every LED maximum LED channel voltage and current, and dimming mode. channel (analogue or digital) LED channel voltage range: 6 - 44 V LED channel voltage estimated without the need for measurement circuitry LED channel current regulation (as opposed to input power supply or LED channel voltage regulation) Real-time fault detection and protection (e.g., short or open circuit) Opto-isolated DALI interface Opto-isolated bridge USB to serial UART interface Single input power supply: 48 V - 56 V PCB board dimensions: 135 mm x 82 mm RoHS compliant January 2016 DocID028914 Rev 1 1/9 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL077V1 1 Schematic diagram Figure 1: STEVAL-ILL077V1 Daughter board circuit schematic (1 of 3) SWIM I/F RED Status GREEN USB to UART TTL (3,3V) GSPG250 1161010SG 2/9 DocID028914 Rev 1 VCC is 3.3V J2 VCC VCCA L1 J1 VCC VCC SWIM I/F WE-CBF C1 C2 C3 C4 C5 R2 R3 1uF 10nF 10nF 100n F 100n F 25V 16V 16V 25V 25V 1K 1K R6 Near the power pin D1 D2 0R Led Chain RUN FAULT VCC VCCA LED PW C6 PWM2 PWM2 LED PW 1uF PWM3 PWM3 VCC 25V R7 PWM4 L CH0 PW M4 L CH0 C40 13 2 100R BOARD TYPE L CH1 VOUT DIGIN 0 /CCO CLK L CH1 DMG CH1 L CH2 100n F 3 DIGIN 1 L CH2 DMG CH2 25V SWIM 9 6 SW IM DIGIN 2 10 7 DMG CH3 nRST R8 CPP0 NRST DIGIN 3 VDR CPP0 17 100R I2C SDA CPP1 DIGIN 4 /I2C SDA CPP1 PWM0 1 18 I2C SCLK CPP2 GPIO1 0 /P W M 0 DIGIN 5 /I2C SCL CPP2 PWM1 4 R9 GPIO1 1 /P W M 1 PWM2 5 26 CPM2 100R GPIO1 2 /P W M 2 CPM3 VCC DMG CH1 PWM3 19 24 GPIO1 3 /P W M 3 CPP 3 DMG CH1 PWM4 16 25 FCPP2 DMG CH2 GPIO1 4 /P W M 4 CPP 2 DMG CH2 PWM5 8 27 FCPP1 DMG CH3 GPIO1 5 /P W M 5 CPP 1 DMG CH3 28 FCPP0 CPP 0 CPM0 22 R10 Led Chain GPIO0 0 /UART TX/CPM0 SEL HW CPM1 23 31 10K GPIO0 1 /UART RX/CPM1 ADCIN 7 20 32 Power DEBUG GPIO0 2 /I2C SDA/OSCOUT ADCIN 6 21 33 NUM LEDSTR GPIO0 3 /I2C SCL/OSCIN ADCIN 5 14 34 SER SEL VDR LED PW GPIO0 4 /DALI TX/UART TX ADCIN 4 VDR LED PW NTC ADC 15 35 GPIO0 5 /DALI RX/UART RX ADCIN 3 VCC ADC 36 ADCIN 2 VDR ADC VPW L ED ADC 37 TP1 ADCIN 1 VPW LED ADC R11 38 VPW L ED ADC VDR ADC ADCIN 0 VDR ADC 12K VCC ADC VCC ADC CPM2 SER SEL VCC SER SEL NUM LEDSTR Power NUM LEDSTR C7 U1 DEBUG 470n F DEBUG STNRG388A R12 R13 SEL HW SEL HW 25V 2K2 2K2 R23 J3 100 CON11 J4 CPP2 FCPP2 I2C SCLK 1 CON10 TP2 R14 I2C SDA LED PW 2 1 12K C37 3 L CH0 2 CPM0 220p F R15 10K 4 LED PW 3 25V SER TX L CH1 R16 100R 5 4 C8 R30 SER RX LED PW R17 100R 6 5 470n F 100 7 6 25V CPP1 FCPP1 8 L CH2 7 VDR 9 8 C38 BOARD TYPE 10 9 220p F 11 10 TP3 25V R18 R37 12K R19 0R 100 R52 0R CPM1 CPP0 FCPP0 R53 0R C9 R54 0R C39 470n F R55 0R 220p F 25V 25V 3 SER RX 2 SER TX 1 RUN 1 2 FAULT 1 2 4 3 2 1 12 11 GNDIO VDDIO 30 29 GND A VDDA