RL1632R-R150-F datasheet(12/17 Pages) ALLEGRO

Part #	RL1632R-R150-F

Description	Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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12 / 17 page

Constant-Current 3-Ampere PWM Dimmable

Buck Regulator LED Driver

A6211

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Figure 13. Waveforms showing the effects of adding a small filter capacitor across the LED string

• Operating conditions: at 200 Hz, VIN = 24 V, VOUT = 15 V, fSW = 500 kHz, L = 10 μH, duty cycle = 50%

• CH1 (Red) = VIN (10 V/div), CH2 (Blue) = VOUT (10 V/div),

CH3 (Green) = iLED (500 mA/div), CH4 (Yellow) = Enable (5 V/div), time scale = 1 ms/div

Panel 13A. Operation without using any output

capacitor across the LED string

Panel 13B. Operation with a 0.68 μF ceramic

capacitor connected across the LED string

C1,C2

VIN

VOUT

iLED

VEN

C1,C2

VIN

VOUT

iLED

VEN

RL1632R-R150-F Datasheet(PDF) 12 Page - Allegro MicroSystems