A8530 Datasheet PDF - Allegro MicroSystems
| Part Number | A8530 | |
| Description | Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver | |
| Manufacturers | Allegro MicroSystems | |
| Logo |  |
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There is a preview and A8530 download ( pdf file ) link at the bottom of this page. Total 11 Pages | ||
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A8530
Ultracompact 6-Channel Backlight
and Flash/Torch White LED Driver
Features and Benefits
▪ Proprietary adaptive control scheme (1×, 1.5×, 2×)
▪ 0.5% typical LED current matching
▪ 2 separate serial interfaces for dimming control
▪ Drives up to 6 white LEDs (4 display backlight, 2 flash/torch)
▪ 30 mA per LED channel for display backlight
▪ 100 mA per LED channel for flash/torch backlight
▪ 320 mA total output current capability
▪ Low EMI design and soft-start function
▪ Short circuit, overvoltage, thermal shutdown protection
▪ 0.75 mm very thin profile, 3 mm × 3 mm package
Package: 16 pin QFN/MLP (suffix ES)
Description
The A8530 high efficiency charge pump ICs offer a simple,
low-cost white LED driver solution for driving four display
backlight and two flash/torch/video mode white LEDs. Using
a proprietary control scheme (1×, 1.5×, and 2×), the A8530
can deliver well-matched LED current while maintaining the
highest efficiency and low EMI. The LED current is regulated
over the entire range of Li+ battery voltage to provide uniform
intensity.
LED brightness and on/off can be controlled for 4 display
backlight LEDs and 2 flash/torch LEDs through 2 single-wire
serial interface pins.
TheA8530 is available in a very thin profile (0.75 mm nominal
height) 3 mm× 3 mm QFN/MLP 16 pin package. Applications
include:
▪ White LED backlights for cellular phones, PDAs
▪ Digital cameras, camcorders
▪ Other portable device white LED backlighting
▪ 320 mA WLED flash/torch
Approximate Scale 1:1
www.DataSheet4U.com
Typical Applications
VBATT
2.7 to 5.5 V
CIN
4.7 µF
C1
1 µF
C2
1 µF
RSET
On/Off and
Dimming
Control
VIN VOUT
C1+ LED1
C1– LED2
C2+ A8530
LED3
C2–
ISET
LED4
ENM
LED5
ENF GND LED6
COUT
4.7 µF
D1
D2
D3
D4
D5
D6
D1-D4 Backlight; D5-D6 Flash
Figure 1. 4 × 30 mA backlight with 2 × 100 mA flash
VBATT
2.7 to 5.5 V
CIN
4.7 µF
C1
1 µF
C2
1 µF
RSET
On/Off and
Dimming
Control
VIN VOUT
C1+ LED1
C1– LED2
C2+ A8530
LED3
C2–
ISET
LED4
ENM
LED5
ENF GND LED6
COUT
4.7 µF
D1
8530-DS
Figure 3. 320 mA flash
VBATT
2.7 to 5.5 V
CIN
4.7 µF
C1
1 µF
C2
1 µF
RSET
On/Off and
Dimming
Control
VIN VOUT
COUT
4.7 µF
C1+
LED1
D1
C1– LED2
C2+ A8530
LED3
C2–
ISET
LED4
ENM
LED5
ENF GND LED6
D5
D6
D1-D4 Backlight; D5-D6 Flash
Figure 2. 3 × 100 mA flash
VBATT
CIN
1 μF
RSET
On/Off and
Dimming
Control
VIN VOUT
C1+
LED1
D1
C1–
LED2
D2
C2+ A8530
D3
LED3
C2– D4
ISET
LED4
D5
ENM
LED5
D6
ENF GND LED6
D1-D4 Main; D5-D6 Flash
VIN>Vf(max)+0.2 V, Vf = LED forward drop
Figure 4. High efficiency current sink
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A8530
Ultracompact 6-Channel Backlight
and Flash/Torch White LED Driver
Performance Characteristics
Tests performed using application circuit shown in figure 1
TA= 25°C, VIN= 3.6 V (unless otherwise noted)
95
90
85
80
75
70
65
60
55
2.7
Efficiency versus Supply Voltage
for LED1 through LED4, in parallel
VFx = 3.4 V
IFx = 20 mA
VFx = 3.1 V
IFx = 10 mA
3.1 3.5 3.9 4.3 4.7 5.1
VIN (V)
5.5
95
90
85
80
75
70
65
60
55
2.7
Efficiency versus Supply Voltage
for LED5 and LED6, in parallel
VFx = 3.7 V
IFx = 100 mA
VFx = 3.2 V
IFx = 50 mA
3.1 3.5 3.9 4.3 4.7 5.1
VIN (V)
5.5
Logic Level
RSET versus ILED
1.2 35
1.1
VHI
1.0
0.9
0.8
VLO
0.7
30
25
RSET = 6.N
20
RSET = N
15
10
0.6 5
0.5
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VIN (V)
0
4 6 8 10 12 14 16
RSET (N
Dimming on ENM
Enable Pulses versus Total Current, LED1 through LED4
VENM
C1
C2
t
ILED14
Symbol
C1
C2
t
Parameter
VENM
ILED14
time
Units/Division
0.5 V
50 mA
50 ms
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A8530 electronic component. |
| Information | Total 11 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ A8530.PDF Datasheet ] | |
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| Part Number | Description | MFRS |
| A8530 | The function is Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver. Allegro MicroSystems | |
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