Datasheet LTM8042, LTM8042-1 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | μModule (Power Module) Boost LED Driver and Current Source |
| Pages / Page | 32 / 1 — FEATURES. DESCRIPTION. True Color PWM™ with 3000:1 Dimming Ratio. … |
| File Format / Size | PDF / 304 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. True Color PWM™ with 3000:1 Dimming Ratio. Operates in Boost, Buck Mode or Buck-Boost Mode
Model Line for this Datasheet
Text Version of Document
LTM8042/LTM8042-1 µModule Boost LED Driver and Current Source
FEATURES DESCRIPTION
n
True Color PWM™ with 3000:1 Dimming Ratio
The LTM®8042 is a complete µModule® Boost LED Driver n
Operates in Boost, Buck Mode or Buck-Boost Mode
specifically designed to drive LEDs up to 1A, while the n
Wide Input Voltage Range:
LTM8042-1 drives up to 350mA. It combines a boost
Operation from 3V to 30V
power topology with a unique current loop to operate as
Transient Protection to 40V
a constant-current source. The PWM input provides as n
Gate Driver for Optional PWM Dimming with
much as 3000:1 LED dimming, while 10:1 analog dimming
P-channel MOSFET
can be accomplished by a single resistor or analog voltage n Adjustable Frequency: 250kHz to 2MHz applied to the CTL pin. As with any boost topology, the n Constant-Current and Constant-Voltage Regulation LTM8042/LTM8042-1 has an uninterrupted current path n Low Shutdown Current: <1μA between its input and output and is thus intolerant to a n RoHS Compliant Package with Gold Pad Finish short-circuit or overload from the output to ground. n Tiny, Low Profile (9mm × 15mm × 2.82mm)
# WHITE LEDS LED CURRENT 12VIN 24VIN
Surface Mount LGA Package 6 1A LTM8042 7 350mA LTM8042-1
APPLICATIONS
8 1A LTM8042 n 9 350mA LTM8042-1 Display Backlighting n Automotive and Avionic Lighting The LTM8042/LTM8042-1 is packaged in a thermally n Illumination enhanced, compact overmolded land grid array (LGA) n Scanners package. The LTM8042/LTM8042-1 is Pb-free and a L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks RoHS compliant. and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION µModule Boost LED Driver, Driving 8 White LEDs at 1A Efficiency vs VIN
97 UP TO 26.8V 96 VIN VCC LTM8042 16V TO 26V 95 RUN LED+ 94 BSTIN/BKLED– TG 93 PWM BSTOUT/BKIN 92 SYNC 1A 91 EFFICIENCY (%) TGEN 90 SS 89 4.7µF RT GND CTL 88 4.7µF 33.2k 87 fSW = 550kHz 16 17 18 19 20 21 22 23 24 25 26 VIN (V) 80421 TA01b 80421 TA01a 80421fb For more information www.linear.com/LTM8042 1
FEATURES DESCRIPTION
n
True Color PWM™ with 3000:1 Dimming Ratio
The LTM®8042 is a complete µModule® Boost LED Driver n
Operates in Boost, Buck Mode or Buck-Boost Mode
specifically designed to drive LEDs up to 1A, while the n
Wide Input Voltage Range:
LTM8042-1 drives up to 350mA. It combines a boost
Operation from 3V to 30V
power topology with a unique current loop to operate as
Transient Protection to 40V
a constant-current source. The PWM input provides as n
Gate Driver for Optional PWM Dimming with
much as 3000:1 LED dimming, while 10:1 analog dimming
P-channel MOSFET
can be accomplished by a single resistor or analog voltage n Adjustable Frequency: 250kHz to 2MHz applied to the CTL pin. As with any boost topology, the n Constant-Current and Constant-Voltage Regulation LTM8042/LTM8042-1 has an uninterrupted current path n Low Shutdown Current: <1μA between its input and output and is thus intolerant to a n RoHS Compliant Package with Gold Pad Finish short-circuit or overload from the output to ground. n Tiny, Low Profile (9mm × 15mm × 2.82mm)
# WHITE LEDS LED CURRENT 12VIN 24VIN
Surface Mount LGA Package 6 1A LTM8042 7 350mA LTM8042-1
APPLICATIONS
8 1A LTM8042 n 9 350mA LTM8042-1 Display Backlighting n Automotive and Avionic Lighting The LTM8042/LTM8042-1 is packaged in a thermally n Illumination enhanced, compact overmolded land grid array (LGA) n Scanners package. The LTM8042/LTM8042-1 is Pb-free and a L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks RoHS compliant. and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION µModule Boost LED Driver, Driving 8 White LEDs at 1A Efficiency vs VIN
97 UP TO 26.8V 96 VIN VCC LTM8042 16V TO 26V 95 RUN LED+ 94 BSTIN/BKLED– TG 93 PWM BSTOUT/BKIN 92 SYNC 1A 91 EFFICIENCY (%) TGEN 90 SS 89 4.7µF RT GND CTL 88 4.7µF 33.2k 87 fSW = 550kHz 16 17 18 19 20 21 22 23 24 25 26 VIN (V) 80421 TA01b 80421 TA01a 80421fb For more information www.linear.com/LTM8042 1
