A8514KLPTR-T Allegro Microsystems Inc, A8514KLPTR-T Datasheet - Page 33

• Manufacturer Part Number: A8514KLPTR-T
• Description: IC LED DVR WHT 4X80MA 16-ETSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A8514KLPTR-T

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A8514
Step 9
tance of C
across it:
Selecting coupling capacitor C
C
SW
SW
=
=
is related to the maximum voltage ripple allowed
2.2 μF
C
0.1 (V)
I
IN
100 kΩ
∆V
0.24 (A)
OUT
9 to 16 V
SW
V
Figure 35. Typical application showing SEPIC configuration, with accurate input current sense, and VSENSE
to ground protection.
IN
V
C
D
f
2 (MHz)
MAX
SW
0.033 Ω
0.765
249 Ω
R
R
SC
ADJ
11 kΩ
R
ISET
=
20 Ω
R
SW
C
0.92 μF
. The minimum capaci-
0.1 μF
C
22 nF
C
VDD
C
10 kΩ
R
FSET
Wide Input Voltage Range, High Efficiency
Q1
GATE
VSENSE
VIN
VDD
FAULT
PWM/EN
APWM
FSET/SYNC
ISET
10 μH
(50)
L1
AGND
A8514
PAD
The rms current requirement of the coupling capacitor is given
by:
The voltage rating of the coupling capacitor must be greater than
V
2.2 μF 25 V will suffice for this application.
SW
PGND
IN
2.2 μF
C
(max), or 16 V in this case. A ceramic capacitor rated for
SW
COMP
I
LED1
LED2
LED3
LED4
CSW
OVP
10 μH
rms =
2 A / 60 V
L2
D1
Fault Tolerant LED Driver
120 pF
=
C
0.848 (A)
I
39.2 kΩ
P
R
IN
OVP
(max)
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
R
C
Z
Z
V
150 Ω
1 – D(max)
4.7 μF
1 – 0.765
C
0.47 μF
OUT
OUT
D(max)
0.765
=
0.47 A
(51)
33