Output Ripple & Noise - TDK-Lambda HWS300P Series Instruction Manual

6-8. Remote ON/OFF Control
Remote ON/OFF control is provided.
Using this function, output ON/OFF is allowed to control without input voltage ON/OFF. The output is turned to ON when TOG
and CNT terminals are shorted, and the output is turned to OFF when these terminals are opened. When the function is not used,
connect TOG and CNT terminals. The standards for this function are as follows. "TOG" terminal is return for "CNT" terminal.
(1) TTL compatible. The maximum input voltage to CNT terminal is 12V, and the maximum allowable reverse voltage is –1.0V.
The sink current for CNT terminal is 3.5mA.
(2) A switch and relay or a transistor can be used as ON/OFF switch.
(3) Remote ON/OFF control circuit is isolated from the input and output by a photo-coupler and can be controlled regardless of
the output potential (+ or -). Connect TOG terminal to ground of control signal.
The mode of control
CNT Level for TOG Terminal
Short or L (0V - 0.8V)
Open or H (2.4V - 12V)
6-9. Output Ripple & Noise
The standard specification for maximum ripple value is measured specified measurement circuit (JEITA-RC9131A). When load
lines are longer, ripple becomes larger. In this case, electrolytic capacitor, film capacitor, etc. might be necessary to use across
the load terminal. The output ripple cannot be measure accurately if the probe ground lead of oscilloscope is too long.
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Output
ON
OFF
CNT
TOG
+
Power
Supply
-
Coaxial Cable
1.5m 50Ω
Built-in Fan
Rotate
Stop
3.5mA Sink Current
Relay, Transistor,
TTL, etc.
Load
R:50Ω
C:4700pF
Oscillo-
R
scope
C
100MHz
- 10-
TDK-Lambda
HWS300P-600P Series
INSTRUCTION MANUAL