A8480 Datasheet PDF Download, Allegro Micro Systems





(PDF) A8480 Datasheet Download

Part Number A8480
Description Boost Regulator
Manufacture Allegro Micro Systems
Total Page 13 Pages
PDF Download Download A8480 Datasheet PDF

Features: www.DataSheet4U.com A8480 Boost Regulat or for Display Bias or LED Driver Feat ures and Benefits ▪ Output disconnect during shutdown ▫ 1 μA shutdown cur rent ▪ 2.7 to 9 V input ▫ Operate w ith 1 or 2 Li+ battery input supply ▪ Output voltage up to 23 V ▪ 1.2 MHz switching frequency ▪ 1.5 A switch cu rrent limit ▪ Internal overvoltage an d overtemperature protection, and soft start Description The A8480 is a 1.2 M Hz optimized boost converter with inter nal soft-start and compensation to supp ort WLED, flash/torch, and display bias applications. The input voltage range of 2.7 to 9 V supports either 1 or 2 Li -ion battery applications. The high vol tage integrated double-diffused MOSFET (DMOS) allows output voltages as high a s 23 V with a switch current limit of 1 .5 A, this increases the maximum quanti ty of LEDs that can be used in series. To maximize battery life in the applica tion, the output can be completely disc onnected from the battery voltage to virtually eliminate leakage current in the .

Keywords: A8480, datasheet, pdf, Allegro Micro Systems, Boost, Regulator, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent

www.DataSheet4U.com
A8480
Boost Regulator for Display Bias or LED Driver
Features and Benefits
Output disconnect during shutdown
1 μA shutdown current
2.7 to 9 V input
Operate with 1 or 2 Li+ battery input supply
Output voltage up to 23 V
1.2 MHz switching frequency
1.5 A switch current limit
Internal overvoltage and overtemperature protection,
and soft start
Package:
9-pin CSP (suffix CG)
10-pin MLP/DFN (suffix EJ)
with exposed thermal pad
Approximate Scale 1:1
Description
TheA8480 is a 1.2 MHz optimized boost converter with internal
soft-start and compensation to support WLED, flash/torch,
and display bias applications. The input voltage range of
2.7 to 9 V supports either 1 or 2 Li-ion battery applications.
The high voltage integrated double-diffused MOSFET(DMOS)
allows output voltages as high as 23 V with a switch current
limit of 1.5 A, this increases the maximum quantity of LEDs
that can be used in series.
To maximize battery life in the application, the output can be
completely disconnected from the battery voltage to virtually
eliminate leakage current in the system. For system protection,
the A8480 has internal overtemperature and overvoltage
protection.
The A8480 is available in both 1.6 mm × 1.6 mm, 0.5 mm
nominal height CSP, and 3 mm × 3 mm, 0.75 mm nominal
height MLP/DFN packages.
Applications include:
WLED flash/torch
WLED backlight
OLED bias supplies
LCD bias supplies
General purpose boost converter
8480-DS
Typical Applications
VSUPPLY
2.8 to 5 V
CIN
1 μF
6.3 V
L1
22 μH
MBRA130LT3
VOUT
D1
EJ only
B1[3]
[1]
VIN A8480
[PGND]
SW
A3[10]
B2[2] FB[FB1]
CAP A2[9]
RADJ
12.1 kΩ
C1[4] FBADJ
C2[5] DIM
OUT1
B3[8]
GND A1[7]
ON1
C3[6]
48 kΩ
COUT
2.2 μF
16 V
30 Ω
Square brackets indicate pin names or numbers used only with the EJ package;
where no brackets are shown with a pin name, name applies to both CG and EJ packages
Figure 1. Using the A8480 to drive a flash (100 mA) or torch (20 mA)

                    
                 






Index : 0  1  2  3   4  5  6  7   8  9  A  B   C  D  E  F   G  H  I  J   K  L  M  N   O  P  Q  R   S  T  U  V   W  X  Y  Z
@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)