PYD20 Manual
DC-DC Converter Isolated, 20W, 2x1”, PCB Mount
All parameters are typical values specified at nominal input voltage, nominal output load, 25°C ambient and after a 5 minutes run-in time unless
otherwise noted. The information presented in this document is believed to be accurate and reliable and may change without notice.
For additional information, please visit
https://product.tdk.com/en/power/py
.
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DOC-ID: 260921 – Issue 1
5. F
UNCTIONAL
D
ESCRIPTION
The output is electronically protected against no-load, overload and short circuit. In case of an overload or
short circuit, the device will operate intermittently (hiccup mode).
The device can supply resistive and inductive loads.
Avoid loads with large input capacitances. If the capacitive load is higher than the values specified, the device
operates in an intermittent mode (hiccup mode).
PYD20-72WS05: max.
6800µF
PYD20-72WS12: max.
3300µF
PYD20-72WS15: max.
2200µF
PYD20-72WD12: max.
820µF
PYD20-72WD15: max.
680µF
PYD20-72WD24: max.
330µF
The ± output voltage is generated by one converter. The sum of the two voltages is regulated. The power
can be drawn asymmetrically but it is recommended that the less loaded output should take a minimum of
5% of the total load.
For single output voltage models, the output voltage can be adjusted with an external resistor connected
between the TRIM-pin and the output voltage.
The device is equipped with an over-temperature protection. In case of a high temperature, the output shuts
down and starts automatically after cooling off.
The device is equipped with under-voltage protection on the input side. If the input voltage is too low, the
device does not start or switches off.
In case of an internal defect, a redundant circuit prevents the output voltage from becoming excessive or
dangerous (zener diode type protection).
The device is equipped with a remote ON/OFF function.
6. F
UNCTIONAL
D
IAGRAM
Input
+
-
Output
Output
Voltage
Adjust
OVP: Overvoltage,
OCP: Overcurrent,
SCP: Short-circuit
Protection
Input
Filter
(Pi-type)
Remote
ON/OFF
Output
Filter
Power
Converter
Output
Voltage
Regulator
+
-
1
2
6
3
5
4
RC
TRM
UVP:
Undervoltage
Protection
OTP: Over-
temperature
Protection
Input
+
-
Output
OVP: Overvoltage,
OCP: Overcurrent,
SCP: Short-circuit
Protection
Remote
ON/OFF
Output
Filter
Power
Converter
Output
Voltage
Regulator
+
-
1
2
6
3
4
5
RC
COM
UVP:
Undervoltage
Protection
OTP: Over-
temperature
Protection
Input
Filter
(Pi-type)
Functional diagram for models with a single output
voltage
Functional diagram for models with dual output voltages
RC:
Remote ON/OFF control pin
TRM:
Trim pin for output voltage adjustment
