
5
TDK-Lambda
ZWQ Series
INSTRUCTION MANUAL
3. Explanation of Functions and Precautions
3-1. Input Voltage Range
Input voltage range is single phase 85 ~ 265VAC ( 47 ~
63Hz ) or 120 ~ 370VDC. Input voltage which is out of
specification may cause unit damage. For cases where
conformance to various safety spec(UL,CSA,EN) are
required, input voltage range of application for safety
100 ~ 240VAC ( 50/60Hz ).
3-2. Output Voltage Range
V.ADJ trimmer ( VR51, VR81 ) can adjust the output
voltage of V1 and V4 within the range. To turn the
trimmer clockwise, the output voltage will be increased.
Output voltage range of V1 is within 5 ~ 5.25V, V4 is
following range. Note over voltage protection ( OVP )
function may trigger if the output voltage is increased
excessively.
V4 Output Voltage Range
5223; 2.0V ~ 3.63V
5225; 2.0V ~ 5.25V
5222; 11.4V ~ 12.6V
5224; 22.8V ~ 25.2V
3-3. Inrush Current
This series has used Power Thermistor to protect the
circuit from Inrush Current. Please carefully select input
switch and fuse in cases of the high temperature and re-
input the power.
3-4. Wattbox
This series designed as a WATTBOX. You are flexibly
adjust output power of each channel within the limit of
the total allowable output power in specification.
WTOTAL ³ WV1 + WV2 + WV3 + WV4
WV1 : Less than maximum V1 output power.
WV2 : Less than maximum V2 output power.
WV3 : Less than maximum V3 output power.
WV4 : Less than maximum V4 output power.
3-5. Minimum output Current
The output voltage of all channel is stabilized when
minimum output current of V1 is more than 12% of
maximum output current. Note all channel may not
when V1 has no load.
3-6. Over Voltage Protection ( OVP )
The OVP function ( Inverter shut down method, manual
reset type ) built into each channel. (OVP function at
V2 and V3 is total voltage detection method.) When
OVP of each channel triggers, the all outputs will be
shut down. The input shall be removed for a few
minutes, and then re-input for recovery of the output to
recover. OVP setting shall be fixed and not to be ad-
justed externally.
3-7. Over Current Protection ( OCP )
Total & constant current limiting, automatic recovery.
OCP function operates when the total maximum output
power exceeds 102% of total allowable peak output
power on specification. The output will be automatical-
ly recovered when the overload condition is canceled.
Also, this unit employs total current detection for OCP.
Therefore, take note that the unit might be damaged be-
cause OCP may not operate even if each channel ex-
ceeds each maximum output current specification.
Never operate the unit under over current or shorted
conditions over 30 seconds which could result in dam-
age, insulation failure, smoking or burning.
3-8. Output Ripple & Noise
The standard specification for maximum ripple value is
measured according to measurement circuit specified by
EIAJ-RC9131. When load lines are longer, ripple will
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 accurate-
ly if the probe ground lead of oscilloscope is too long.