Lexington, Mass. - STMicroelectronics has rolled three triple-channel, high-voltage video amplifiers to complement its TDA9210 video preamplifier in 15- to 17-inch CRT monitors. The TDA9556, TDA9555 and TDA9553 deliver rise and fall times of 7.5, 9.5 and 11 nanoseconds, respectively.
Technical marketing manager Pierre Fournier said the amps are designed in a 120-volt bipolar/CMOS/DMOS process, and can thus drive the three cathodes of a CRT monitor directly. The direct-drive approach eliminates the need for dc-restore circuitry, he said. Each amplifier operates from a low-voltage supply (12 Vcc typical) and a high-voltage supply (up to 115 Vdd). The output voltage range is wide enough to provide cutoff adjustment (typically 25 V), video contrast (typically up to 40 V) and brightness with the remaining voltage range. Standby power consumption is 60 milliwatts.
The amps are available in ClipWatt 11 plastic packages and are priced at 90 cents in lots of 50,000. The TDA-9556 is in production. The TDA9555 and TDA9553 will sample in May and go into production in June.
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EETInfo No. 615