Datasheet > A6217KEJTR-J

A6217KEJTR-J

更新时间： 2024-11-06 01:01:11

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
19页	1102K
描述
Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver

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数据手册

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A6217KEJTR-J 数据手册

A6217 and A6217-1

Automotive-Grade, Constant-Current

PWM Dimmable Buck Regulator LED Driver

DESCRIPTION

FEATURES AND BENEFITS

The A6217 is a single IC switching regulator that provides

constant-currentoutputtodrivehigh-powerLEDs.Itintegrates

ahigh-sideN-channelDMOSswitchforDC-to-DCstep-down

(buck) conversion. A true average current is output using a

cycle-by-cycle, controlled on-time method.

• AEC-Q100 qualified

• 6 to 48 V supply voltage

• True average output current control

• 3 A maximum output over operating temperature range

(1.5 A for A6217-1)

• Cycle-by-cycle current limit

• Integrated MOSFET switch

Output current is user-selectable by an external current sense

resistor. Output voltage is automatically adjusted to drive

various numbers of LEDs in a single string. This ensures the

optimal system efficiency.

• Enable / PWM dimming via direct logic input or power

supply voltage

• Internal control loop compensation

• Undervoltage lockout (UVLO) and thermal shutdown

protection

LED dimming is accomplished by a direct logic input pulse-

width-modulation (PWM) signal at the enable pin.

• Low power shutdown (1 µA typical)

• Robust protection against:

▫ꢀAdjacentꢀpin-to-pinꢀshort

▫ꢀPin-to-GNDꢀshort

▫ꢀComponentꢀopen/shortꢀfaults

• Enhancements over A6213:

The device is provided in a 3 mm × 3 mm wettable flank 10-pin

DFN(suffixEJ)oran8-pinnarrowSOIC(suffixLJ), bothwith

exposed pad for enhanced thermal dissipation. Both packages

are lead (Pb) free, with 100% matte-tin leadframe plating.

▫ꢀDitheringꢀofꢀswitchingꢀfrequencyꢀtoꢀreduceꢀEMI

▫ꢀAbleꢀtoꢀdriveꢀsingleꢀwhiteꢀLEDꢀfromꢀ18ꢀVꢀsupplyꢀatꢀ2.2ꢀMHz

▫ꢀSmallerꢀpackageꢀoption

APPLICATIONS:

Automotive lighting

• Daytime running lights

• Front and rear fog lights

• Turn/stop lights

PACKAGES:

10-pin DFN with

wettable flank

• Map light

(suffix EJ)

• Dimmable interior lights

Not to scale

8-pin SOICN

(suffix LJ)

TYPICAL APPLICATION CIRCUIT

V (6 to 48 V)

LED+

GND

A6217

(EJ)

1, 2

9,10

VIN

TON

BOOT

GND

VCC

PAD

Enable/PWM Dimming

(100 Hz to 2 kHz)

LED–

RSENSE

A6217-DS

12 3 4 5 6 7...19

中文翻译

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