A8603KESTR-R datasheet(1/42 Pages) ALLEGRO

部件名	A8603KESTR-R

功能描述	Multiple-Output Regulator for Automotive LCD Displays

PDF	42 Pages

Scroll/Zoom	100%

制造商	ALLEGRO [Allegro MicroSystems]

网页	http://www.allegromicro.com

标志

1 / 42 page

The A8603 is a fixed-frequency, multiple-output supply for

LCD bias. Its switching frequency can be either programmed

orsynchronizedwithanexternalclocksignalbetween350kHz

and 2.25 MHz. This will minimize interference with AM and

FM radio bands.

An I2C-compliant serial interface allows a system

microcontroller to configure the A8603 by writing into its

internalregisters.AsystemcontrollercanalsoaccesstheA8603

status registers in case of fault conditions.

The A8603 incorporates a boost stage followed by two linear

regulatorsandtwocharge-pumpregulators.Eachoutputvoltage

can be programmed independently through serial interface.

During power-up and shutdown, the outputs are turned on and

off in preprogrammed sequences with adjustable delay. This

willmeetthesequencingrequirementsforspecificLCDpanels.

Short-circuit protection is provided for all outputs. The boost

switch is protected against overcurrent and overvoltage.

The A8603 is provided in a 24-pin 4 mm × 4 mm QFN

package, with exposed thermal pad to allow operation at high

ambient temperatures. It is lead (Pb) free with 100% matte-tin

leadframe plating.

A8603-DS, Rev. 9

• Automotive-grade AEC-Q100 qualified

• Input voltage from 3 to 10 V

• Four individual output supplies

• Independent control of each output voltage

• Boost switching frequency: 350 kHz to 2.25 MHz

• External synchronization capability is available

• Frequency dithering to reduce EMI

• Less than 10 μA shutdown current

• Protection features: overcurrent, overvoltage, short

circuit, and thermal overload protection

• Fully programmable outputs through I2C

□ Regulator voltage

□ Startup/shutdown sequences

□ Fault retry counter

Multiple-Output Regulator for Automotive LCD Displays

PACKAGES:

System Block Diagram Showing Typical Regulator Voltages

Not to scale

A8603

V

SUPPLY

3 to 10 V

Enable

External Sync

Micro

Controller

IC

2

VIN

EN

FSET/SYNC

SDA

SCL

ADDR

FAULT

SW

VOUT

AVDD

VGH

VGL

VCOM

L1

D1

C

OUT

LCD PANEL

V8 to 14 V

AVDD

V 14 to 29 V

VGH

V-4 to -12 V

VGL

V3 to 7.5 V

VCOM

A8603

FEATURES AND BENEFITS

DESCRIPTION

24-Pin 4 mm × 4 mm QFN

with Sidewall Plating

APPLICATIONS

• GPS

• Infotainment

• Medium LCDs

January 18, 2017

24-Pin 4 mm × 4 mm QFN

with Wettable Flank

类似零件编号 - A8603KESTR-R

制造商	部件名	数据表	功能描述
Allegro MicroSystems	A8600	2Mb / 52P	Designed to provide the power supply requirements of next generation car audio and infotainment systems, the A8600 provides all the control and protection circuitry to produce...
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