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LTM8042 Datasheet(PDF) 1 Page - Linear Technology

Part # LTM8042
Description  關Module Boost LED Driver and Current Source
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTM8042 Datasheet(HTML) 1 Page - Linear Technology

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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.
# WHITE LEDS
LED CURRENT
12VIN
24VIN
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.
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
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 VIN
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.
VIN (V)
16
87
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
VCC
RUN
BSTIN/BKLED
PWM
SYNC
TGEN
SS
VIN
16V TO 26V
LED+
TG
BSTOUT/BKIN
4.7μF
33.2k
fSW = 550kHz
4.7μF
1A
UP TO 26.8V


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