a8530 Allegro MicroSystems, Inc., a8530 Datasheet - Page 5

• Manufacturer Part Number: a8530
• Description: Ultracompact 6-channel Backlight And Flash/torch White Led Driver
• Manufacturer: Allegro MicroSystems, Inc.

A8530
1.0
1.2
1.1
0.9
0.8
0.7
0.6
0.5
95
90
85
80
75
70
65
60
55
2.7
2.7
Efficiency versus Supply Voltage
3.1
3.1
for LED1 through LED4, in parallel
3.5
3.5
Logic Level
V
3.9
3.9
HI
V IN (V)
V IN (V)
V
I
Fx
Fx
= 10 mA
= 3.1 V
Tests performed using application circuit shown in figure 1
4.3
4.3
V
Enable Pulses versus Total Current, LED1 through LED4
LO
T
C1
Performance Characteristics
C2
A
= 25°C, V
4.7
4.7
V
I
Fx
Fx
= 20 mA
= 3.4 V
5.1
5.1
IN
= 3.6 V (unless otherwise noted)
Dimming on ENM
5.5
5.5
t
and Flash/Torch White LED Driver
Ultracompact 6-Channel Backlight
95
90
85
80
75
70
65
60
55
35
30
25
20
15
10
5
0
2.7
4
Efficiency versus Supply Voltage
3.1
6
for LED5 and LED6, in parallel
V
I
LED14
ENM
R
3.5
SET
R
SET
= 6.65 kΩ
Symbol
8
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
C1
C2
t
versus I
3.9
R
R
SET
SET
V IN (V)
Parameter Units/Division
10
(kΩ)
= 8.87 kΩ
I
V
LED14
time
ENM
LED
4.3
V
I
Fx
Fx
= 50 mA
= 3.2 V
12
V
I
Fx
Fx
4.7
50 mA
50 ms
0.5 V
= 100 mA
= 3.7 V
14
5.1
5.5
16
5