Supertex inc.
32-Channel,
256 Gray-Shade High Voltage Driver
Features
►
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HVCMOS
®
technology
5.0V CMOS inputs
Output voltage up to +80V
PWM gray shade conversion
Capable of 256 levels of gray shading
10MHz shift and count clock frequency
20MHz data throughput rate
8 bit data bus
32 outputs per device
BLANK function
Output polarity control
HV632
General Description
The HV632 is a 32-channel gray-shade column driver IC designed for
driving electrofluorescent displays. Using Supertex’s unique HVCMOS
®
technology, it is capable of 256 levels of gray shading by PWM conversion.
Input data, in groups of eight, is latched into a set of data latches on both
edges of the shift clock. The data shifted in the first data latch corresponds
to HV
OUT
1, the second data latch corresponds to HV
OUT
2, and so on. These
data are compared to the contents of the master binary counter which counts
on both edges of the count clock. Each time the master counter begins to
decrement from 1111 1111, the data in the data latches are compared with
the contents of the counter; if they match, the corresponding outputs will
go high. The master counter counts down to 00000001 and then starts
to count up again. The outputs that are at high will stay at high until the
contents of the counter match the data in the data latches again. Therefore,
the higher the binary data in the data latches, the longer the outputs will
stay at high. Thus, different high voltage pulse widths are produced. When
the counter reaches its 1111 1111 count while counting up, the device is
ready for the next operation cycle. A data value of 0000 0000 produces no
pulse; the output stays low.
The BLANK input signal will reset the master counter to all ones (1111 1111)
and set all high voltage outputs to low, or will set all high voltage outputs to
high state, when the POL is low. The POL input signal, forced low, will invert
the polarity of the output pulse. If left unconnected, POL input will be pulled
high to V
DD
by an on-chip resistor.
Applications
►
Field Emission Displays (FED)
►
Polymer Liquid Crystal Displays (PLCD)
►
Vacuum Fluorescent Displays (VFD)
Typical Application Circuit
Low Voltage
Power Supply
D
IN
(1-8)
SC
High Voltage
Power Supply
HV632
High Voltage
HV
OUT
1
Columns
(Cathodes)
Micro
Processor
CSI
CC
LC
BL
POL
CSO
Low Voltage
Latches
Counter
Comparators
32
Level
Translators
&
Push-Pull
Output
Buffers
Display
Panel
(FED)
Scan
Driver
HV57908
Shift Register
CSI for cascading the next HV632
Doc.# DSFP-HV632
A061913
HV
OUT
32
Supertex inc.
www.supertex.com
HV632
Ordering Information
Part Number
HV632PG-G
Package Option
64-Lead PQFP
Packing
66/Tray
Pin Configuration
64
-G denotes a lead (Pb)-free / RoHS compliant package
Absolute Maximum Ratings
Parameter
Supply voltage, V
DD
Supply voltage, V
PP
Logic input levels
Continuous total power dissipation
1
Operating temperature range
Storage temperature range
Value
-0.5V to +7.5V
-0.5V to +90V
-0.5V to V
DD
+0.5V
1200mW
-40°C to +85°C
-65°C to +150°C
1
64-Lead PQFP
(top view)
Product Marking
Top Marking
HV63 2PG
LLLLLLLLLL
YYWW
CCCCCCCC AAA
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect device
reliability. All voltages are referenced to device ground.
Note:
1. For operation above 25°C ambiant derate linearly to 85°C at 20mW/°C
L = Lot Number
YY = Year Sealed
WW = Week Sealed
C = Country of Origin
A = Assembler ID
= “Green” Packaging
Package may or may not include the following marks: Si or
64-Lead PQFP
Typical Thermal Resistance
Package
64-Lead PQFP
θ
ja
41
O
C/W
Recommended Operating Conditions
Sym
V
DD
V
PP
V
IL
V
IH
T
A
Parameter
Logic supply voltage
Positive high voltage supply
Low-level input voltage
High-level input voltage
Operating temperature
Min
4.5
12
0
V
DD
-1
-40
Max
5.5
80
1.0
V
DD
+85
Units
V
V
V
V
°C
Electrical Characteristics
(over recommended operating conditions of V
Sym
Parameter
Min
Max
DD
= 5.0V, V
PP
= 80V, and T
A
= 25°C unless noted)
Units
Conditions
Low Voltage DC Characteristics (Digital)
V
DD
I
DD
I
DDQ
I
IH
I
IL
I
OH
I
OL
Low voltage digital supply voltage
V
DD
supply current
Quiescent V
DD
supply current
High-level input current
Low-level input current
High level output current
Low level output current
4.5
-
-
-
-
-1.0
1.0
2
5.5
25
150
10
-10
-
-
V
mA
µA
µA
µA
mA
mA
---
f
SC
= 10MHz, f
CC
= 10MHz
All V
IN
= GND, Count Clock = V
DD
V
IN
= V
DD
V
IL
= GND
V
OUT
= 0.9V
DD
V
OUT
= 0.1V
DD
Doc.# DSFP-HV632
A061913
Supertex inc.
www.supertex.com
HV632
Electrical Characteristics
(over recommended operating conditions of V
Sym
Parameter
Min
Max
DD
= 5.0V, V
PP
= 80V, and T
A
= 25°C unless noted)
Units
Conditions
High Voltage DC Characteristics
I
PPQ
I
OUT(p)
I
OUT(n)
I
PP
Quiescent V
PP
supply current
P-channel output current
N-channel output current
V
PP
supply current
-
-4.0
4.0
-
100
-
-
1.1
µA
mA
mA
mA
All HV
OUT
low or high
HV
OUT
= 75V
HV
OUT
= 5.0V
C
L
= 0pF, F
CC
=10MHz
AC Characteristics
f
SC
f
CC
f
DIN
t
CW
t
CSS
t
CSH
t
SCC
t
DSS
t
DSH
t
DW
t
LCW
t
CCW
t
CCC
t
LCD
t
CCD
t
BLW
t
BLD
t
CDD
t
CSOH
t
CSOL
Shift clock frequency
Count clock frequency
Data In frequency
Chip select pulse width
Chip select to shift clock set-up time
Chip select to shift clock hold time
Shift clock cycle time
Data to shift clock set-up time
Data to shift clock hold time
Data In pulse width
Load count pulse width
Count clock pulse width
Count clock cycle time
Load count to count clock delay
Count clock to HV
OUT
turn-on/turn-off
BLANK pulse width
BLANK to HV
OUT
delay
Count clock delay between count down and
count up cycles
CSO delay output for High
CSO delay output for Low
-
-
-
80
5.0
15
100
10
40
50
75
50
100
100
-
700
-
150
-
-
10
10
20
-
-
-
-
-
-
-
-
-
-
-
300
-
500
-
40
40
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
---
---
---
---
---
---
---
---
---
---
---
---
---
---
C
L
= 15pF
---
C
L
= 15pF
---
C
L
= 15pF
C
L
= 15pF
Doc.# DSFP-HV632
A061913
3
Supertex inc.
www.supertex.com
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