A6211 ALLEGRO [Allegro MicroSystems], A6211 Datasheet - Page 13

• Manufacturer Part Number: A6211
• Description: Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A6211
Application Circuit
The application circuit in figure 14 shows a design for driving
a 15 V LED string at 1.3 A (set by R
quency is 500 kHz, as set by R1. A 0.68 μF ceramic capacitor is
added across the LED string to reduce the ripple current through
the LEDs (as shown in figure 13B).
Figure 14. Application circuit diagram
Symbol
R
SENSE
C1
C2
D1
L1
V
IN
GND
EN
= 24 to 48 V
EMZA500ADA470MF80G
UMK316BJ475KL-T
RL1632R-R150-F
C1
47 μF
50 V
NR8040T100M
Part Number
Suggested Components
B250A-13-F
140 kΩ
4.7uF
R1
50V
C2
SENSE
). The switching fre-
1
2
3
4
Constant-Current 3-Ampere PWM Dimmable
VIN
TON
EN
CS
United Chemi-Con
Manufacturer
A6211
Taiyo Yuden
Taiyo Yuden
Diodes, Inc.
Susumu
BOOT
GND
VCC
SW
8
7
6
5
0.1 μF
C5
0.1 μF
C4
Buck Regulator LED Driver
60 V / 2 A
D1
10 μH / 2 A
L1
0.68 μF
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
50 V
C3
LED–
LED+
R
0.15 Ω
SENSE
(
string
≈
LED
15 V)
13