A6217 and A6217-1: PWM Dimmable Buck Regulator LED Driver

Description

Top Features

The A6217 is a single IC switching regulator that provides constant-current output to drive high-power LEDs. It integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method.

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

The device is provided in a 3 mm × 3 mm wettable flank 10-pin DFN (suffix EJ) or an 8-pin narrow SOIC (suffix LJ), both with exposed pad for enhanced thermal dissipation. Both packages are lead (Pb) free, with 100% matte-tin leadframe plating.

APPLICATIONS:

Automotive lighting

Daytime running lights
Front and rear fog lights
Turn/stop lights
Map light
Dimmable interior lights

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
Enable / PWM 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:
- Adjacent pin-to-pin short
- Pin-to-GND short
- Component open/short faults
Enhancements over A6213:
- Dithering of switching frequency to reduce EMI
- Able to drive single white LED from 18 V supply at 2.2 MHz
- Smaller package option

Part Number Specifications and Availability

Part Number	Package Type	Temperature	RoHS Compliant	Part Composition / RoHS Data	Samples	Check Stock
A6217KEJTR-1-J	n/a	-20°C to 85°C	Yes	View Data	Contact your local sales rep	Check Distributor Stock
A6217KEJTR-J	n/a	-20°C to 85°C	Yes	View Data	Contact your local sales rep	Check Distributor Stock
APEK6217KEJ-01-MH-0	DEMO BOARD	-20°C to 85°C	No	--	Contact your local sales rep	Check Distributor Stock
APEK6217KEJ-01-MH-01	DEMO BOARD	-20°C to 85°C	No	--	Contact your local sales rep	Check Distributor Stock
APEK6217KLJ-01-MH	DEMO BOARD	-20°C to 85°C	No	--	Contact your local sales rep	Check Distributor Stock
APEK6217KLJ-01-MH-01	DEMO BOARD	-20°C to 85°C	No	--	Contact your local sales rep	Check Distributor Stock
A6217KLJTR-1-T	8-lead SOIC	-40°C to 125°C	Yes	View Data	Contact your local sales rep	Check Distributor Stock
A6217KLJTR-T	8-lead SOIC	-40°C to 125°C	Yes	View Data	Contact your local sales rep	Check Distributor Stock

Part Number

Package Type

Temperature

RoHS
Compliant

Part Composition /
RoHS Data

Comments

Samples

Check Stock

A6217KEJTR-1-J

n/a

-20°C to 85°C

Yes