PCA8536
PCF8536
I
2
C/SPI LCD and PWM LED controller for
industrial and automotive applications
Key features
`` Single-chip`320`segment`LCD`controller`and`dri ver
`` 6-channel`PWM`generator`for`backlight`LED`ill umination`
`` AEC`Q100`compliant`for`automotive`applications`(PCA8536)
`` Selectable`display`bias`conguration
`` Wide`digital`supply`voltage`range:`1.8`to`5.5`V
`` Wide`LCD`supply`voltage`range:`2.5`to`9.0`V
`` Choice`of`serial`interface:`I
2
C`(PCx8536AT)`or`SPI`
(PCx8536BT)`
`` Low`power`consumption
`` Operating`temp`up`to`85`°C`(PCF8536)`or`95`°C`(PCA8536)
`` Silicon`gate`CMOS`process
Applications
`` Industrial`version`(PCF8536)
-`White`goods
-`Co nsumer`products
`` Automotive`version`(PCA8536)
-`Car`rad io
-`Climate`control
-`Dashboard`display
This`advanced,`highly`integr ated`LCD`controller`drives`up`to`eight`backplanes,`up`to`44`segments,`
and`up`to`320`elements,`and`provides`an`on-chip,`6-channel`PWM`controller`for`LED`illumination.`
Compatible`with`most`MCUs,`it`simplies`design,`reduces`power,`and`minimizes`communication`
overhead.
The`NXP`PCx8536`is`a`peripheral`device,`equipped`with``
a`low-p ower`serial`interface`(I
2
C-`or`SPI-bus),`that`controls`and`
drives`almost`any`LCD`display`with`multiplex`rates`up`to`1:8.`
The`device`is`available`in`two`types,`one`for`industrial`
(PCF8536)`an d`one`for`automotive`applicati ons`(PCA8536).``
The`automotive`type`supports`an`extended`operating`
tem perature`range`up`to`95`°C,`and`i s`AEC`Q100`compliant.`
Bot h`types`are`also`compatible`wi th`most`microcontrollers`and`
communicate`via`standard`serial`interfaces.`The`AT`versions`
use`the`two-line`bidirectional`I
2
C-bus`(400`kHz),`while`the`BT`
versions`use`the`three-line`unidirectional`SPI-bus`(5`MHz).`
Co mmunication`overheads`are`minimized`by`using`a`320-bit`
display`RAM`with`auto-incremented`addressing.
An`on-chip`PWM`controller`for`LED`ba cklight`illumination``
is`included.`The`PWM`has`six`outputs`with`7-bit`resolution``
(128`steps)`ideal`to`drive`external`transistors.`Up`to`six`
independent`channels`can`be`co ngured.`The`128`levels``
NXP LCD driver
PCA8536 and PCF8536
www.nxp.com
© 2011 NXP Semiconduc tors N.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The
information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and
may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof
does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Date of release: November 2011
Document order number: 9397 750 17189
Printed in the Netherlands
per`channel`allow`to`control`2`RGB`backlights`with`a`spec trum`
of`mor e`than`2`million`colors.`Each`channel`can`also`be`used`
for`static`LED`drive`or`as`logic`output.
The`PCx8536`generates`the`dri ve`signals`for`any`multiplexed`
LCD`containing`up`t o`eight`backplanes,`up`to`44`segmen ts,`
and`up`to`320`element s.`4,`6,`or`8`backplanes`can`be`dr iven.`
The`320`segments`can`i nclude`up`to`40`seven-segment`digits,`
up`to`20`fourteen-segment`alphanumeric`characters,`or`any`
graphic`of`up`to`320`elements.`The`frame`frequen cy`can`
be`programmed`in`the`range`of`60`to`300`Hz`in`steps`of`10`
Hz.`The`reference`oscillator`is`factory`calibrated.`The`device`
compensates`the`DC`offset`vol tage`a cross`the`LCD`in`line`
inversion`mode,`or`in`frame`invers ion`mode`(selec table).
The`LCD`supply`range`from`2.5`V,`for`use`with`low-threshold`
LCDs,`up`to`9.0`V`for`high-threshold`TN`LCDs.`The`digital`
power`supply`can`be`from`1.8`to`5.5`V,`and`the`logi c`supply`
can`be`separated`from`the`LCD`supply.`Also,`to`avoid`icker`
of`the`display,`the`PWM`and`LCD`fram e`frequencies`can`be`
set`independently.`Backplane`swapping`eases`PCB`design`
by`making`it`possible`to`move`the`backplane`and`segment`
outputs`from`one`side`to`the`other.`
PCx8536AT (I
2
C version) block diagram
Integrated PWM controller for LED backlighting and button lighting Ordering information
PCx8536BT (SPI version) block diagram
PWM Controller
For LED Backlighting
For LED Button Lighting
V
DD3
PWM 1
PWM 2
PWM 6
PCx8536
MCU
V
DD 1
V
DD2
Easy color m ixing
PWM 3
Larger current /
higher voltage
Each of the 6 PWM channels
can be controlled
independently
NXP
BC847 /
BC857
Type
number
AEC Q100
Compliant
Interface
type
Package
type
Version
PCA8536AT/Q900/1 Yes I
2
C-bus TSSOP56 SOT364-1
PCA8536BT/Q900/1 Yes SPI-bus TSSOP56 SOT364-1
PCF8536AT/1 - I
2
C-bus TSSOP56 SOT364-1
PCF8536 BT/1 - SPI-bus TSSOP56 SOT364-1