Leitch 880 Series, Инструкция по эксплуатации

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6 880 Series Audio Distribution Amplifiers Instruction Manual
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Power Supply
882PS
The 882PS power supply is a two-stage switching power supply that provides
the following outputs:
•
+21V at 1.0A
• –21V at 1.0A
Initial design criteria focused on maximizing efficiency and minimizing
individual component temperature rise. This has been achieved with a two stage
design consisting of an input “Buck” converter feeding a high efficiency
push-pull output stage. Overall efficiency exceeds 80% and individual
component temperature rise is minimized by operating both converts at high
voltage and low current as well as using Schottky rectifier diodes on the output
stage.
The power supply is designed to work over the two standard input voltage
ranges. With jumper J1 installed the power supply operates over an input range
of 85-135VAC and with jumper J1 removed the operating range is
170-270VAC. Output voltage is adjustable by ±10%. Other output voltages can
be achieved by changing power transformer TR1 without any additional circuit
changes.
884PS
The model 884PS power supply is a two-stage switching power supply that
provides that provides the following outputs:
•
+21V at 1.0A
• –21V at 1.0A
Initial design criteria focused on maximizing efficiency and minimizing
individual component temperature rise. This has been achieved with a two stage
design consisting of an input “Buck” converter feeding a high efficiency
push-pull output stage. Overall efficiency exceeds 80% and individual
component temperature rise is minimized by operating both converts at high
voltage and low current as well as using Schottky rectifier diodes on the output
stage.
The power supply is designed to work over the two standard input voltage
ranges. With input selector switch S2 in the 110 position, the power supply
operates over and input range of 85 – 135VAC and with the switch in the 220
position the operating range is 170 – 270VAC. Output voltage is adjustable by
±10%. Other output voltages can be achieved by changing power transformer
TR1 without any additional circuit changes.