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A8603KESTR-R Datasheet(PDF) 5 Page - Allegro MicroSystems

Part # A8603KESTR-R
Description  Multiple-Output Regulator for Automotive LCD Displays
PDF  42 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A8603KESTR-R Datasheet(HTML) 5 Page - Allegro MicroSystems

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Multiple-Output Regulator for
Automotive LCD Displays
A8603
5
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Functional Block Diagram
L1
VIN
(3 to 10 V)
SW
D1
VOUT
PGND
V
OUT
AVDD
ON
ON
LDO
1
LDO
2
Boost
Control
VIN
BIAS
FSET/SYNC
COMP
AGND
EN
Ext. Sync.
Ext. Enable
Enable
2.8 V
BIAS
Regulator
Osc with
Dithering
Enable
AVDD_ON
VCOM_ON
VGH_OFF
VGL_OFF
VGH_ON
VGL_ON
Enable
I C
2
Interface
Register
Bank
VGL/VGH
Interlock
D2A
Converters
Regulation
Targets
Ref 1–4
SDA
SCL
ADDR
BIAS
R1
R2
R
Z
R
FSET
C
Z
VIN
FAULT
Fault
OVP
UVP
OCP
TSD
...
VGL
VGL > 90%
VGH
VGH < 30%
Ref3
OFF
ON
Inverter
Charge
Pump
3
Using 2 External
Diodes
VGL
CP22
CP21
VGL
–12 V
+
VGL
CP22
CP21
VGL
–8 V
+
Optional 3× Configuration
VGH3
VGH
CP12
CP11
VGH (3×)
27 V
Ref4
ON
OFF
VGH3
VGH
CP12
CP11
+
VGH (2×)
18 V
2×/3×
Charge
Pump
4
GNDVCOM
VCOM
VCOM
3 to 7.5 V
+
Ref2
ON
Ref1
AVDD
10 V
(Output voltages shown
for typical LCD panel.)



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