Document
Supertex inc.
HV632
32-Channel, 256 Gray-Shade High Voltage Driver
Features
►►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
Applications
►►Field Emission Displays (FED) ►►Polymer Liquid Crystal Displays (PLCD) ►►Vacuum Fluorescent Displays (VFD)
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 HVOUT1, the second data latch corresponds to HVOUT2, 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 VDD by an on-chip resistor.
Typical Application Circuit
Low Voltage Power Supply
High Voltage Power Supply
DIN(1-8)
HV632
High Voltage
HVOUT1
SC
Micro Processor
CSI CC LC BL
Low Voltage
Level Translators
Latches Counter Comparators
32
& Push-Pull
Output Buffers
POL CSO
Shift Register CSI for cascading the next HV632
HVOUT32
Columns (Cathodes)
Display Panel (FED)
Scan Driver HV57908
Doc.# DSFP-HV632 A061913
Supertex inc. www.supertex.com
Ordering Information
Part Number
Package Option
HV632PG-G
64-Lead PQFP
-G denotes a lead (Pb)-free / RoHS compliant package
Packing 66/Tray
Pin Configuration
64
HV632
Absolute Maximum Ratings
Parameter
Value
Supply voltage, VDD Supply voltage, VPP Logic input levels Continuous total power dissipation1
-0.5V to +7.5V -0.5V to +90V -0.5V to VDD +0.5V
1200mW
Operating temperature range
-40°C to +85°C
Storage temperature range
-65°C to +150°C
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
1
64-Lead PQFP
(top view)
Product Marking
Top Marking
HV632PG LLLLLLLLLL YYWW CCCCCCCC AAA
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
θja
64-Lead PQFP
41OC/W
Recommended Operating Conditions
Sym
Parameter
VDD Logic supply voltage VPP Positive high voltage supply VIL Low-level input voltage VIH High-level input voltage TA Operating temperature
Min 4.5 12 0 VDD -1 -40
Max 5.5 80 1.0 VDD +85
Units V V V V °C
Electrical Characteristics (over recommended operating conditions of VDD = 5.0V, VPP = 80V, and TA = 25°C unless noted)
Sym Parameter
Min Max Units Conditions
Low Voltage DC Characteristics (Digital)
VDD Low voltage digital supply voltage IDD VDD supply current IDDQ Quiescent VDD supply current IIH High-level input current IIL Low-level input current IOH High level output current IOL Low level output current
4.5 5.5
V ---
- 25 mA fSC = 10MHz, fCC = 10MHz - 150 µA All VIN = GND, Count Clock = VDD - 10 µA VIN = VDD - -10 µA VIL = GND -1.0 - mA VOUT = 0.9VDD 1.0 - mA VOUT = 0.1VDD
Doc.# DSFP-HV632 A061913
2 Supertex inc. www.supertex.com
HV632
Electrical Characteristics (over recommended operating conditions of VDD = 5.0V, VPP = 80V, and TA = 25°C unless noted)
Sym Parameter
Min Max Units Conditions
High Voltage DC Characteristics
IPPQ IOUT(p) IOUT(n)
IPP
Quiescent VPP supply current P-channel output current N-channel output current VPP supply current
AC Ch.