ALED6000
Datasheet
Automotive 3 A 61 V monolithic current source with dimming capability
Features
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AECQ100 qualification
Up to 3 A DC output current
4.5 V to 61 V operating input voltage
R
DS(on)
= 250 mΩ typ.
Adjustable f
SW
(250 kHz - 1.5 MHz)
Dimming function with dedicated pin
Low I
Q
shutdown (10 µA typ. from VIN)
Low I
Q
operating (2.4 mA typ.)
3.2% output current accuracy
Synchronization
Enable with dedicated pin
Adjustable soft-start time
Adjustable current limitation
Low-dropout operation (12 μs max.)
VBIAS improves efficiency at light load
Auto recovery thermal shutdown
HTSSOP16
Applications
Product status link
ALED6000
Device summary
Order code
Package
ALED6000PHTR
HTSSOP16
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Suitable for automotive systems
HB LED driving applications
Halogen bulb replacement
Description
The
ALED6000
is a step down monolithic switching regulator designed to source up
to 3 A DC current for high power LED driving. The wide input voltage range makes
the
ALED6000
the ideal choice for automotive systems. The 250 mV typical RSENSE
voltage drop enhances the efficiency performance. Digital dimming is implemented
by driving the dedicated DIM pin.
The adjustable current limitation, designed to select the inductor RMS current
accordingly with the nominal output LEDs current, and the switching frequency
adjustability make the size of the application compact. Pulse-by-pulse current
sensing, improved by digital frequency scaling, implements an effective constant
current protection over the different application conditions. The embedded switch-
over feature on the VBIAS pin maximizes the efficiency. Multiple devices can
be synchronized sharing the SYNCH pin to prevent beating noise in low noise
applications and the input current RMS value to be reduced.
DS13018
-
Rev 2
-
May 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
ALED6000
Pin settings
3
Pin settings
3.1
Pin connection
Figure 3.
Pin connection (top view)
VBIAS
VIN
VIN
VCC
EN
SS
SYNCH
COMP
1
2
3
4
5
6
7
8
EXPOSED
PAD TO
SGND
16
15
14
13
12
11
10
9
GND
BOOT
LX
LX
DIM
ILIM
FSW
FB
3.2
Pin description
Table 1.
Pin description
#
Pin
Description
Auxiliary input that can be used to
supply part of the analog circuitry to
increase the efficiency at light load.
Connect to GND if not used or bypass
with a 1 µF ceramic capacitor if supplied
by an auxiliary rail
DC input voltage
DC input voltage
Filtered DC input voltage to the internal
circuitry. Bypass to the signal GND by a
1 µF ceramic capacitor
Active high enable pin. Connect to VCC
pin if not used
An internal current generator (5 µA
typ.) charges the external capacitor to
implement the soft-start
Master / slave synchronization
Output of the error amplifier. The
designed compensation network is
connected on this pin
Inverting input of the error amplifier
A pull-down resistor to GND selects the
switching frequency
1
VBIAS
2
3
4
VIN
VIN
VCC
5
EN
6
7
8
9
10
SS
SYNCH
COMP
FB
FSW
DS13018
-
Rev 2
page 4/45
ALED6000
Maximum ratings
#
11
Pin
ILIM
Description
A pull-down resistor to GND selects the
peak current limitation
A PWM signal in this input pin
implements the LED PWM current
dimming. It is pulled-down by internal 2
µA current
Switching node
Switching node
Connect an external capacitor (100 nF
typ.) between BOOT and LX pins. The
gate charge required to drive the internal
n-DMOS is recovered by an internal
regulator during the off-time
Signal GND
Exposed pad must be connected to
GND plane
12
DIM
13
14
LX
LX
15
BOOT
16
--
GND
E.P.
3.3
Maximum ratings
Stressing the device above the rating listed in may cause permanent damage to the device. These are stress
ratings only and operation of the device at these or any other conditions above those indicated in the operating
sections of this specification is not implied. Exposure to absolute maximum rating conditions may affect device
reliability.
Table 2.
Absolute maximum ratings
Symbol
VIN
VCC
BOOT
VBIAS
EN
DIM
LX
SYNCH
SS
FSW
COMP
ILIM
FB
T
J
T
STG
T
LEAD
I
HS
Operating temperature
range
Storage temperature
range
Lead Temperature
(soldering 10 s)
High-side RMS current
V
BOOT
- GND
V
BOOT
– V
LX
Description
Min.
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-40
-65
Max.
61
61
65
4
VCC
VCC
VCC
VIN+0.3
5.5
3.6
3.6
3.6
3.6
3.6
150
150
260
3
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
°C
°C
°C
A
DS13018
-
Rev 2
page 5/45
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