※Contact TDK-Lambda concerning items not mentioned or items which are not clear.
4. Terminal Function / Protection Function / Series
4. Terminal Function / Protection Function / Series
4. Terminal Function / Protection Function / Series
4. Terminal Function / Protection Function / Series Connection
Connection
Connection
Connection・
・・
・Parallel Connection
Parallel Connection
Parallel Connection
Parallel Connection
4-1 Remote Control (RC Terminal)
When the input voltage is in an ON condition, the RC terminal can be used to control output ON/OFF.
When not using the Remote Control function, either open the RC terminal or connect it to the
–
Vin terminal.
We recommend connection to the
–
Vin terminal in order to prevent malfunction caused by noise.
Table 4-1-1 RC Terminal Specifications
RC Terminal Voltage
Logic
Min. [V]
Max. [V]
Output Condition
0
1.2
L Level
or Open
ON
H Level
10
+Vin
OFF
※ When the
–
Vin terminal is used for GND.
If the RC terminal is set at L Level or open condition, the output is ON.
If the RC terminal is set at H Level, the output is OFF.
When the converter is in a latch stop condition because of a protection function, after removing the abnormal factor, use the
Remote Control to turn the output OFF, then turn ON after the lapse of 1 second minimum for recovery to occur.
Qrc
+Vin
-Vin
R3
DC
Input
RC
RC
Control
Signal
R2
Qrc
+Vin
-Vin
R3
R2
DC
Input
RC
R1
RC
Control
Signal
Fig. 4-1-1 RC Terminal Connection Method 1 Fig. 4-1-2 RC Terminal Connection Method 2
Table 4-1-2 Recommended Value of External Resistor R1 when using the RC Terminal
Converter Type
CCxx-24xxSxx-E
CCxx-48xxSxx-E
R1 Recommended Value
22kΩ
220kΩ
R2 (Typical)
91ｋΩ
194ｋΩ
R3 (Typical)
15kΩ
47kΩ
When a connection method as shown in Fig. 4-1-1 is used, and if capacitance exists between the +Vin and RC terminals, there is
the possibility of the RC terminal voltage becoming unstable because of the capacitance in the case when the input voltage is
changed suddenly (it becomes a factor causing malfunction). In that case, we recommend the connection method shown in Fig.
4-1-2. In addition, the rating of the external transistor used is as follows: Vce: greater than the Vin, Ic: minimum 10mA.
