Linear Technology LTM8042EV Demo Board 32V, 1A µModule Boost LED Driver DC1511A-A DC1511A-A 数据表
产品代码
DC1511A-A
LTM8042/LTM8042-1
1
80421fa
TYPICAL APPLICATION
FEATURES
DESCRIPTION
µModule Boost LED Driver
and Current Source
The LTM
®
8042 is a complete μModule
®
Boost LED Driver
specifically designed to drive LEDs up to 1A, while the
LTM8042-1 drives up to 350mA. It combines a boost
power topology with a unique current loop to operate as
a constant-current source. The PWM input provides as
much as 3000:1 LED dimming, while 10:1 analog dimming
can be accomplished by a single resistor or analog voltage
applied to the CTL pin. As with any boost topology, the
LTM8042/LTM8042-1 has an uninterrupted current path
between its input and output and is thus intolerant to a
short-circuit or overload from the output to ground.
LTM8042-1 drives up to 350mA. It combines a boost
power topology with a unique current loop to operate as
a constant-current source. The PWM input provides as
much as 3000:1 LED dimming, while 10:1 analog dimming
can be accomplished by a single resistor or analog voltage
applied to the CTL pin. As with any boost topology, the
LTM8042/LTM8042-1 has an uninterrupted current path
between its input and output and is thus intolerant to a
short-circuit or overload from the output to ground.
# WHITE LEDS
LED CURRENT
12V
IN
24V
IN
6
1A
LTM8042
7
350mA
LTM8042-1
8
1A
LTM8042
9
350mA
LTM8042-1
The LTM8042/LTM8042-1 is packaged in a thermally
enhanced, compact overmolded land grid array (LGA)
package. The LTM8042/LTM8042-1 is Pb-free and a RoHS
compliant.
enhanced, compact overmolded land grid array (LGA)
package. The LTM8042/LTM8042-1 is Pb-free and a RoHS
compliant.
μModule Boost LED Driver, Driving 8 White LEDs at 1A
APPLICATIONS
n
True Color PWM™ with 3000:1 Dimming Ratio
n
Operates in Boost, Buck Mode or Buck-Boost Mode
n
Wide Input Voltage Range:
Operation from 3V to 30V
Transient Protection to 40V
Transient Protection to 40V
n
Gate Driver for Optional PWM Dimming with
P-channel MOSFET
n
Adjustable Frequency: 250kHz to 2MHz
n
Constant-Current and Constant-Voltage Regulation
n
Low Shutdown Current: <1μA
n
RoHS Compliant Package with Gold Pad Finish
n
Tiny, Low Profile (9mm × 15mm × 2.82mm)
Surface Mount LGA Package
n
Display Backlighting
n
Automotive and Avionic Lighting
n
Illumination
n
Scanners
Efficiency vs V
IN
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks
and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
V
IN
(V)
16
87
EFFICIENCY (%)
19
18
97
80421 TA01b
17
20
23
22
21
25
24
26
91
90
93
89
88
95
92
94
96
80421 TA01a
LTM8042
RT
GND CTL
V
CC
RUN
BSTIN/BKLED
–
PWM
SYNC
TGEN
SS
V
IN
16V TO 26V
LED
+
TG
BSTOUT/BKIN
4.7μF
33.2k
f
f
SW
= 550kHz
4.7μF
1A
UP TO 26.8V