24
22” TFT TV Service Manual
13/10/2004
11.19. MC34063
11.19.1. Description
The MC34063A Series is a monolithic control circuit containing the primary functions required for DC–to–
DC converters. These devices consist of an internal temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This
series was specifically designed to be incorporated in Step–Down and Step–Up and Voltage–Inverting
applications with a minimum number of external components.
11.19.2. Features
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
11.19.3. Pin connections
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