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LTM8042 Datasheet(PDF) 1 Page - Linear Technology |
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LTM8042 Datasheet(HTML) 1 Page - Linear Technology |
1 / 32 page 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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