June 2015
DocID027966 Rev 1
1/4
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STEVAL-ILL072V1
Single channel, 1 A automotive LED driver with boost controller
for interior/exterior lights
Data brief
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% @Vin=12 V, Vout=32 V,
Iout=1 A)
RoHS compliant
All automotive grade components
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.
Schematic diagram
STEVAL-ILL072V1
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DocID027966 Rev 1
1 Schematic diagram
Figure 1: STEVAL-ILL072V1 circuit schematic
LX
LDO3
COMP
PWMI
FSW
ADIM
+VIN
GND
VOUT
LED_K
GND
LED_A
VDR
XFAULT
GND
FAULT
NTC
+VIN
+VIN
PGND
SGND
TPAD
ADIM
ADIM
COMP
COMP
CSNS
CSNS
FSW
FSW
GATE
GATE
LDO3
LDO3
LDO3
LDO3
LX
+VIN
OVFB
OVFB
PWMI
PWMI
PWMO
PWMO
VDR
VFBN
VFBN
VFBP
VIN
XFAULT
XFAULT
VOUT VFBP
0
0
0
0
0
0
0
0
0
0
0
R14
68k
L2
XAL1010 -153
C2
47uC7
4u7
D2
BZT52C4V7
C12
1u
C1
4u7
TP5
D1
STPS 5L60 SY
C17
470p
R5
0R056
R1
220k
J11
CON2
1
2
Q1
STD20NF06L
R16
8R2
TP2
J10
CON1
1
TP3
J7
CON1
1
L3
60R
R3
0R30
C19
1n
R8
100k
R13
16k
R11
47k
R15 50k
C3
4u7
L1
XAL7030 -222
C16
1u
JP2
SIL3
1
2
3
J1
CON1
1
C18
1n
C5
4u7
Q2
STS5NF60L
S3
1
S2
2
S1
3
G
4
D1 5
D2 6
D3 7
D4 8
JP1
SIL2
C10
470n
C6
4u7
C4
4u7
J6
CON1
1
TP1
C11
1u
C20
1n
R4
1R R6
1k3
SW1
SIL3
1
2
3
R12
18k
TP4
D3 R-LED
R2
6k8
R7
5R6
U1 ALED600 1
PWMI
1
FSW
2
XFAULT
3
LDO3
4
SGND
5
COMP
6
ADIM
7
OVFB
8CSNS 9
PWMO 10
PGND 11
GATE 12
VDR 13
VIN 14
VFBN 15
VFBP 16
TPAD
17
C13
3n3
J9
CON1
1
J8
CON1
1R10 47k
L4
60R
C14
100p
J5
CON1
1
J3
CON1
1
C15
470n
C9
4u7
J4
CON1
1
J2
CON1
1
R17
10R
R9 680 R
C8
68u
GSPG11062015DI1550
STEVAL-ILL072V1
Revision history
DocID027966 Rev 1
3/4
2 Revision history
Table 1: Document revision history
Date
Version
Changes
12-Jun-2015
1
Initial release.
STEVAL-ILL072V1
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DocID027966 Rev 1
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