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SC1650 - HIGH-VOLTAGE INVERTING DC-DC CONVERTER

Description

The SC1650 is a high performance inverting DC-DC converter, designed to drive an external power switch to generate programmable negative voltages.

In the particularly suitable LCD bias contrast application, maximum efficiency of 90% can be achieved with low cost PNP bipolar transistor drivers.

Features

  • 4V to 24V input voltage operation.
  • Adjustable output voltage up to -40V.
  • Low quiescent current at 100µA.
  • Pulse frequency modulation maintains high.
  • efficiency (max 90%) 100kHz to 320kHz switching frequency Power-Saving shutdown mode (8µA typical) High efficiency with low cost external PNP bipolar transistor.

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Datasheet preview – SC1650

Datasheet Details

Part number SC1650
Manufacturer SEMTECH
File Size 90.51 KB
Description HIGH-VOLTAGE INVERTING DC-DC CONVERTER
Datasheet download datasheet SC1650 Datasheet
Additional preview pages of the SC1650 datasheet.

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Full PDF Text Transcription

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HIGH-VOLTAGE INVERTING DC-DC CONVERTER January 29, 1998 SC1650 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1650 is a high performance inverting DC-DC converter, designed to drive an external power switch to generate programmable negative voltages. In the particularly suitable LCD bias contrast application, maximum efficiency of 90% can be achieved with low cost PNP bipolar transistor drivers. The 4V to 24V input operation range allows the SC1650 to be powered directly by the battery pack in most batteryoperated applications for greater efficiency. The output voltage can be scaled to -40V by two external resistors. A pulse frequency modulation scheme is employed to maintain high efficiency conversion under wide input voltage ranges.
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