STEVAL-ILL072V1 STMicroelectronics

S T E VA L - I L L 0 7 2 V 1 Single channel, 1 A automotive LED driver with boost controller for interior/exterior lights based on the ALED6001 Data brief Description The purpose of this evaluation board is to provide an application example of a single-channel, high- current LED driver using the ALED6001 chip operating with a boost topology. The brightness of the LED string connected to its output can be controlled through a PWM signal (0% - 100% dimming) or a control voltage (10:1 analog dimming). Open LED, feedback disconnection & LED overcurrent fault conditions are detected and managed. The evaluation board has been designed to provide an example of a compact solution for all automotive applications involving several LEDs arranged is a single string, and day-time running lights (DTRL) in particular. Features Wide DC input voltage (8 V - 24 V) Single channel, 1000 mA constant-current output with PWM brightness control 500 kHz switching frequency Up to 10 high-brightness white LEDs (40 V OVP threshold) High efficiency (92% V = 12 V, V = 32 in out V, Iout = 1 A) All automotive grade components RoHS compliant October 2015 DocID027966 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL072V1 1 Schematic diagram Figure 1: STEVAL-ILL072V1 circuit schematic GSPG11062015DI1550 2/4 DocID027966 Rev 2 +VIN VOUT TP4 J1 L1 L2 D1 1 VOUT VFBP +VIN XA L7030 -22 2 XA L1010 -15 3 STPS 5L60 SY CON1 LX R1 LX TP5 220 k R3 0R30 R16 8R2 L3 Q1 OVFB R4 J4 C1 C2 C3 C4 GATE STD20 NF06 L C5 C6 C7 C8 C9 4u 7 47 u 4u 7 4u 7 4u 7 4u 7 4u 7 68 u 4u 7 VFBN 1 LED A 1R R6 CSNS R2 60 R 6k8 CON1 1k3 C17 R17 C19 470 p R5 10 R 1n J2 0R05 6 1 GND CON1 C20 0 C18 J3 1n 1n L4 1 GND J5 C15 1 LED K 470 n CON1 60 R U1 ALED600 1 VDR LDO3 CON1 0 TP2 TP1 Q2 PW MI 1 16 VFBP R7 PW MI VFBP PW MO 4 STS5NF60 L 2 15 FSW VFBN JP1 G FSW VFBN XFAULT 3 14 VIN +VIN 5R6 XFAULT VIN LDO3 LDO3 4 13 VDR LDO3 VDR SGND 5 12 GATE SIL2 SGND GATE COMP 6 11 PGND J6 COMP PGND ADIM 7 10 PW MO ADIM PW MO 1 8 9 GND OVFB CSNS C12 OVFB CSNS 1u C11 C10 CON1 1u 470 n 0 0 TPA D 0 J7 1 FSW +VIN FSW CON1 R8 J9 100 k R11 SW 1 R14 2 PW MI 1 PWMI LDO3 SIL3 47 k CON1 68 k R15 50 k COMP D2 0 TP3 0 BZT52 C4V7 J10 COMP R13 JP2 2 ADIM 1 ADIM 16 k SIL3 J8 CON1 0 0 R10 47 k R12 1 XFAULT LDO3 18 k XFAULT C14 J11 CON1 100 p 1 C16 NTC D3 R- LED R9 680 R 2 C13 1u 3n 3 CON2 FAULT 0 0 17 TPA D 1 3 1 3 1 8 S3 D4 2 7 S2 D3 3 6 S1 D2 5 D1