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Plasma TV Service Manual 05/01/2006
12.1. MC34063
12.1.1. 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.
12.1.2. General 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
12.1.3. Pin Connections
12.2. 24LC32
12.2.1. Description
24LC32 is a 4K x 8 (32K bit) Serial Electrically Erasable PROM capable of operation across a broad
voltage range (2.5V to 6.0V). This device has been developed for advanced, low power applications
such as personal communications or data acquisition. The 24LC32 features an input cache for fast
write loads with a capacity of eight 8-byte pages, or 64 bytes. It also features a fixed 4K-bit block of
ultra-high endurance memory for data that changes frequently. The 24LC32 is capable of both random
and sequential reads up to the 32K boundary. Functional address lines allow up to eight 24LC32
devices on the same bus, for up to 256K bits address space. Advanced CMOS technology and broad
voltage range make this device ideal for low-power/low voltage, nonvolatile code and data applications.
The 24LC32 is available the standard 8-pin in plastic DIP and 8-pin surface mount SOIC package.
12.2.2. Features
• Voltage operating range: 2.5V to 6.0V
- Peak write current 3 mA at 6.0V
- Maximum read current 150
LI
A at 6.0V
- Standby current 1
LI
A typical
• Industry standard two-wire bus protocol, I
2
C™
compatible