Planar EL640.480-AF1 Specifications, Control Basics, Power, DC Input Voltage Requirements

Specifications

Control Basics

The EL panel is a matrix structure with column and row electrodes arranged in an X-Y formation. Light is emitted when an AC voltage of sufficient amplitude is applied at a row-column intersection. The display operation is based on the symmetric, line at a time data addressing scheme. Required operating voltages are provided by an integrated DC/DC converter.

Unless otherwise specified, performance characteristics are guaranteed when measured at 25°C.

Power

The supply voltages are shown in Table 1. All internal high voltages are generated from the display supply voltage (VH). The logic supply voltage (VL) should be present whenever video input signals or VH is applied. The minimum and maximum specifications in this manual should be met, without exception, to ensure the long-term reliability of the display. Planar does not recommend operation of the display outside these specifications.

Table 1. DC Input Voltage Requirements.

	AF1		Notes
VL		+5 V ±5%	absolute max 7.0 V
VH		+12 V ±10%	absolute max 15 V
IL, max		75 mA	@ VL = +5 V
IH, max		.7 A	@ VH = +12 V
Ptyp, 120 Hz		4.5 W	3840 'E' characters
Pmax, 120 Hz		8.4 W	50/50 2x2 checkerboard

CAUTION: Absolute maximum ratings are those values beyond which damage to the device may occur.

Table 2. Video Input Requirements.

Description	Min	Max	Units	Notes
Video logic high voltage	3.9	5.0	V	All input thresholds are CMOS
Video logic low voltage	0	0.9	V	Video lines have 100 Ω series
				resistors
Video logic input current	–	±10	µA

CAUTION: There is no overcurrent protection on either the VH or VL inputs to protect against catastrophic faults. Planar recommends the use of a series fuse on the 12 volt supply. A general guideline is to rate the fuse at 1.8 to 2 times the display maximum current rating.

EL640.480-AF1 VGA Operations Manual (020-0349-00A) 5