Applications; Connection Diagrams; Mc44608; Description - Toshiba 29VH27E Service Manual

Line Regulation 0.015% (typical)
Load Regulation 0.1% (typical)

14.18.3.Applications

SCSI-2 Active Terminator
High Efficiency Linear Regulators
Battery Charger
Post Regulation for Switching Supplies
Constant Current Regulator
Microprocessor Supply

14.18.4.Connection Diagrams

14.19.MC44608

14.19.1.Description

The MC44608 is a high performance voltage mode controller designed for off–line converters. This high
voltage circuit that integrates the start–up current source and the oscillator capacitor, requires few
external components while offering a high flexibility and reliability. The device also features a very high
efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique
enables the reduction of the stand–by power consumption to approximately 1W while delivering 300mW
in a 150W SMPS.
• Integrated Start–Up Current Source
• Lossless Off–Line Start–Up
• Direct Off–Line Operation
• Fast Start–Up

14.19.2.General Features

• Flexibility
• Duty Cycle Control
• Under voltage Lockout with Hysteresis
• On Chip Oscillator Switching Frequency 40, or 75kHz
• Secondary Control with Few External Components
Protections
• Maximum Duty Cycle Limitation
• Cycle by Cycle Current Limitation
• Demagnetization (Zero Current Detection) Protection
• "Over V Protection" Against Open Loop
CC
• Programmable Low Inertia Over Voltage Protection Against Open Loop
• Internal Thermal Protection
TM
GreenLine Controller
• Pulsed Mode Techniques for a Very High Efficiency Low Power Mode
• Lossless Startup
• Low dV/dT for Low EMI Radiations
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