Datasheet > EMZA500ADA470MF80G

EMZA500ADA470MF80G

更新时间： 2024-11-04 12:51:11

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器稳压器
页数	文件大小	规格书
17页	614K
描述
Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver

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A6211

Constant-Current 3-Ampere PWM Dimmable

Buck Regulator LED Driver

Description

Features and Benefits

• Supply voltage 6 to 48 V

• True average output current control

• 3.0 A maximum output over operating temperature range

• Cycle-by-cycle current limit

The A6211 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.

• Integrated MOSFET switch

• Dimming via direct logic input or power supply voltage

• Internal control loop compensation

• Undervoltage lockout (UVLO) and thermal shutdown

protection

• Low power shutdown (1 μA typical)

• Robust protection against:

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.

LED dimming is accomplished by a direct logic input pulse

width modulation (PWM) signal at the enable pin.

▫ Adjacent pin-to-pin short

▫ Pin-to-GND short

▫ Component open/short faults

Thedeviceisprovidedinacompact8-pinnarrowSOICpackage

(suffix LJ) with exposed pad for enhanced thermal dissipation.

It is lead (Pb) free, with 100% matte tin leadframe plating.

Package 8-pin SOICN with exposed

thermal pad (suffix LJ):

Applications:

• General Illumination

• Scanners and multi-function printers (light bars)

• Architectural lighting

• Industrial Lighting

• Display case lighting / MR16

Not to scale

Typical Application Circuit

(6 to 48 V)

LED+

GND

VIN

A6211

TON

BOOT

GND

VCC

Enable/PWM Dimming

(100 Hz to 2 kHz)

LED–

RSENSE

A6211-DS

12 3 4 5 6 7...17

中文翻译

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