All specifications are subject to change without notice.
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TDK-Lambda
CPF1000F 280-*
Series
INSTRUCTION MANUAL
●
Reverse Input Connection
Reverse input polarity would cause module damage. For cases where reverse connections are possible,
connect a protective diode and fuse. Use protective diode with higher voltage rating than the input voltage,
and with higher surge current rating than the fuse.
Fuse
-Vin
+Vin
-V
+V
Load
Fig.5-4 Protection for Reversed Connection of Input
6. Explanation of Functions and Precautions
6-1. Input Voltage Range
Input voltage range for
CPF1000F280-* Series is indicated below.
Input Voltage Range : 200
～
400VDC
Basically
，
ripple voltage (Vrpl) which results from rectification and filtering of commercial AC line is included
within the input voltage as shown in Fig. 6-1. Ripple voltage must be limited within the voltage described below.
Allowable input ripple voltage : 20Vp-p
When this value is exceeded, the output ripple voltage becomes large.
Note that sudden input voltage change may cause variation of output voltage transitionally.
Also, input voltage waveform peak value must not exceed above input voltage range.
t
Time
In
put
Voltag
e
Vrpl
below 20V
Input Voltage
Range
Fig.6-1 Ripple Voltage
6-2. Output Voltage Adjustment Range
Output voltage could be adjusted within the range described below by external resistor or variable resistor, or by
applying external voltage. However, take note that OVP might trigger when output voltage adjustment exceeds the
ranges indicated below.
Output Voltage Adjustment Range:
7.2V
〜
14V: For the Standard Model CPF1000F280-14(/T, /S, /TS)
7.2V
〜
18V: For the Modified Standard Model CPF1000F280-14/S12(/TS12, /HY, /THY)
Furthermore, when increasing the output voltage, reduce the output current accordingly so as not to exceed the
maximum output power.
Also, take note that when output voltage is increased, input voltage range is limited as shown in fig. 6-2.
