Planar EL640.480-AM user manual Specifications, Power, DC Input Voltage Requirements

Specifications

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. Operating voltages required are provided by a DC/DC converter.

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

Power

The supply voltages required for the displays are shown in Table 1. All internal high voltages are generated from display supply voltage (VH). The logic supply voltage (VL) should be present whenever video input signals or VH is applied.

Table 1. DC Input Voltage Requirements.

	AM1, AM8 ETL	AM8 IN/ET		Notes
		12 V	24 V
VL	+5 V ±5%	+5 V ±5%	+5 V ±5%	absolute max 7.0 V
VH	+12 V ±10%	+12 V ±10%	+24 V ±10%	absolute max. 15 V
				and 30 V
				respectively
IL, max	75 mA	75 mA	75 mA	@ VL = +5 V
IH, max	2.0 A	2.0 A	1.0 A	@ VH = +12 V
Ptyp, 120 Hz	11 W	11 W	11 W	3840 'E' characters
Pmax, 120 Hz	24 W	24 W	24 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	Notes
Video logic high voltage	3.7 V	5.0 V	All input thresholds are
			CMOS
Video logic low voltage	0 V	0.9 V	Video lines have 100 Ω
			series resistors
Video logic input current	– 10 µA	+10 µA

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.

6EL640.480-AM Operations Manual (020-0351-00C)