AT9917TS-G More Semiconductors - ICs by Microchip Technology

Automotive LED Driver IC w/ High Current Accuracy


The AT9917 is an advanced fixed frequency PWM IC designed to control single-switch, boost, SEPIC, and buck LED drivers in a constant current mode. The controller uses a peak current-mode control scheme (with programmable slope compensation) and includes an internal transconductance amplifier to control the output current with high accuracy. The IC includes a +/-1A gate driver that makes the AT9917 suitable for high power applications. An internal 40V linear regulator powers the IC eliminating the need for a separate power supply for the IC. The IC provides a FAULT output, which can be used to disconnect the LEDs in case of a fault condition (such as an alternator load dump in automobiles) using an external disconnect FET. AT9917 also provides a TTL compatible, low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to several kilohertz. Temperature foldback of the output current is possible, using an external NTC resistor. The AT9917-based LED driver is suited for automotive LED driver applications. The AT9917 based LED lamp drivers can achieve efficiencies in excess of 90% when buck or boost topologies are used.

Where to Buy

Prices starting from US$1.93

Distributor Stock
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Newark Electronics
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TME
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Microchip Technology
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Features

Switch mode controller for boost, SEPIC & buck converters
Closed loop control of output current
High PWM dimming ratio
Internal 40V linear regulator
Internal 3% voltage reference
Constant frequency operation with programmable slope compensation
Linear and PWM dimming
Programmable jitter to reduce EMI
+/-1.0A MOSFET gate driver
Output short circuit protection
Output over voltage protection
Programmable hiccup timer
Temperature fold-back with external NTC resistor
Soft start
Meets AEC-Q100 requirements

Specifications

Topology Boost, SEPIC
+Vin min (V) 5.3
+Vin max (V) 40
Output Current External FET
Dimming PWM / Linear
Package TSSOP-24

Last 6 months Inventory & Pricing History


Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.0735
Shipping Weight (kg) 0.2124
Lead Count 24
Package Type TSSOP
Package Width or Size 4.4mm
Soldering Composition Matte Tin

Alternative Descriptions

Automotive Led Driver Ic With High Current Accuracy 24 Tssop 4.4Mm T/R Rohs Compliant: Yes |Microchip Technology AT9917TS-G | Newark Electronics
IC: driver | TME
AUTOMOTIVE LED DRIVER IC WITH HIGH CURRENT ACCURACY | Microchip Technology


Frequently Asked Questions

Where can I find additional details, specifications and documents for a AT9917TS-G?

Additional datasheets, footprints and schematics for AT9917TS-G are listed on our Part Details page. You can also find images and similar parts to AT9917TS-G on this page.

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What category does AT9917TS-G fall under?

The AT9917TS-G is listed under Semiconductors - ICs > More Semiconductors - ICs.

Can I view similar or alternative parts?

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Is the AT9917TS-G RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for AT9917TS-G have stock available?

Authorised distributors including Newark Electronics, TME, Microchip Technology and Avnet Silica have stock available or on a lead time for AT9917TS-G.

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