TPD-3W Series

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All specifications typical at TA=25 °C, nominal input voltage and rated output current unless otherwise specified.

APPLICATION NOTE

In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full load), a minimum load is specified for this kind of DC/DC

converter. Make sure the specified range of input voltage is not exceeded, the minimum output load no less than 10% load. If the actual load is less than the

specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please

add an appropriate resistor as extra loading, or contact our company for other lower output power products.

2. Recommended Circuit

All the TPD-3W Series have been tested according to the following recommended testing circuit before leaving factory. This series should be tested under load

(see Figure 1). If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the

capacitance should not be too high, or may cause start-up problem. If you want to use the products in high EMI, please choose our metal packaged products

(TPD-3W). For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1).

General: Cin: 5V,12V 100μF

24V,48V 22μF/10μF

Cout: 10μF/100mA

Output External Capacitor Table（Table 1）

Vout(VDC)

Cout(VDC)

5

680

9

470

12

330

15

220

24

100

RECOMMENDED CIRCUIT（Figure 1)）

3. Input current

While using unstable power source, please ensure the output voltage and ripple voltage do

not exceed indexes of the converter. The preceding power source must be able to provide for

converter sufficient starting current Ip (Figure 2).

General: Ip ≤1.4*Iin-max

(Figure 2)

ISOLATION SPECIFICATIONS

Parameter

Conditions

Min.

Typ.

Max.

Units

Isolation voltage

Tested for 1 minute and 1mA max

1500

VDC

Isolation resistance

Test at 500VDC

1000

MΩ

Isolation capacitance

Input/Output, 100KHz/1V

100

pF

OUTPUT SPECIFICATIONS

Parameter

Conditions

Min.

Typ.

Max.

Units

Output power

Refer to selection guide

0.3

3

W

Main output voltage accuracy

Refer to recommended circuit

±1

±3

%

Vice-output voltage accuracy

Refer to recommended circuit

±3

±5

%

Load regulation

From 10% to 100% load

±0.5

±1

%

Line regulation

Input voltage from low to high

±0.2

±0.5

%

Temperature drift (Vout)

Refer to recommended circuit

±0.03

%/℃

Ripple

20MHz Bandwidth

20

50

mVp-p

Noise

20MHz Bandwidth

75

150

mVp-p

Switching frequency

100% load, input voltage range

300

KHZ

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