STEVAL-ILL056V1 Data Brief Datasheet by STMicroelectronics

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STEVAL-ILL056V1
3 A buck LED driver board based on the LED5000
Data brief
Features
5.5 V to 48 V operating input voltage range
850 kHz fixed switching frequency
200 mV typ. current sense voltage drop
Buck / buck-boost / floating boost topologies
PWM dimming
±3% output current accuracy over
temperature
200 mOhm typical RDS(on)
Peak current mode architecture
Short-circuit protection
Compliant with ceramic output capacitors
Inhibit for zero current consumption
Thermal shutdown
RoHS compliant
Description
The STEVAL-ILL056V1 is a product evaluation
board based on the LED5000, an 850 kHz fixed
switching frequency monolithic step-down DC-DC
converter designed to operate as a precise
constant current source with an adjustable
current capability up to 3 A DC.The embedded
PWM dimming circuitry features LED brightness
control. The regulated output current level is set
by connecting a sensing resistor to the feedback
pin. The 200 mV typical RSENSE voltage drop
enhances performance in terms of efficiency.The
size of the overall application is minimized thanks
to the high switching frequency and its
compatibility with ceramic output capacitors. The
device is fully protected against overheating,
overcurrent and output short-circuit.
November 2013 DocID025539 Rev 1 1/4
For further information contact your local STMicroelectronics sales
office
www.st.com
£44 00
Schematic diagram
STEVAL-ILL056V1
1 Schematic diagram
Figure 1: STEVAL-ILL056V1 circuit schematic
2/4 DocID025539 Rev 1
sm all sig nal
power plane
0603 / 0805
CASE 1206
L1A = CO ILCRAFT M SS7341
L1 = CO ILC RAFT XAL6060 O XAL5050
1206+1210 footprint
VLED+
1206+1210 footprint
0603 / 0805
RS
R56
C5
15pF
TP1
D IM
U1 ST1CC 14
SW
8
V IN
7
BOOT
1
EP
EP
D IM
2
IN H
3
GND
6
COMP
4
FB
5
JP2
TP6
GND
C6 100nF
R1
NM
D1 STPS3L60U
2 1
TP3
GND
R4 2k
TP8IN H
VLED-
TP5
TP2
VIN
R3
22K
TP4
C3
100nF
50V
L1A
MSS7341
C2
10uF
50V
C1
10uF
50V
R2
NM
L1
33uH
C7
1uF
50V
C8
1uF
50V
JP1
D3
BZX384-C 39
C4
220pF
D2
BZX84
STEVAL-ILL056V1
Revision history
2 Revision history
Table 1: Document revision history
Date Revision Changes
15-Nov-2013 1 Initial release
DocID025539 Rev 1 3/4
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