6

TEST CONFIGURATIONS

Figure 17: Peak-peak output ripple & noise and startup

transient measurement test setup

Note: 6pcs 560µF OSCON, 4pcs 47µF 1210 MLCC and

20pcs 10uF 1206 MLCC capacitor in the module output.

Scope measurement should be made by using a BNC

connector.

SUPPLY

Vo

GND

Io

LOAD

DISTRIBUTION LOSSES

CONTACT RESISTANCE

Figure 18: Output voltage and efficiency measurement test

setup

Note: All measurements are taken at the module

terminals. When the module is not soldered (via socket),

place Kelvin connections at module terminals to avoid

measurement errors due to contact resistance.

%

100

)

(

×

×

×

=

Ii

Vi

Io

Vo

η

Vo

Input

Cin

1500uF/16V * 2pcs

Aluminum

Cout

SCOPE

10uF/16V * 2pcs

MLCC

Figure 19: Peak-peak Input ripple & noise measurement test

setup

Note: 2pcs 1,500µF Aluminum and 2pcs 10µF MLCC in

the module input. Scope measurement should be made

by using a BNC connector.

DESIGN CONSIDERATIONS

The power module should be connected to a low

ac-impedance input source. Highly inductive source

impedances can affect the stability of the module. An

input capacitance must be placed close to the modules

input pins to filter ripple current and ensure module

stability in the presence of inductive traces that supply

the input voltage to the module.

Safety Considerations

For safety-agency approval the power module must be

installed in compliance with the spacing and separation

requirements of the end-use safety agency standards.

For the converter output to be considered meeting the

requirements of safety extra-low voltage (SELV), the

input must meet SELV requirements. The power module

has extra-low voltage (ELV) outputs when all inputs are

ELV.

The input to these units is to be provided with a

maximum 15A time-delay fuse in the ungrounded lead.

FEATURES DESCRIPTIONS

Over-Current Protection

To provide protection in an output over load fault

condition, the unit is equipped with internal over-current

protection.

When

the

over-current

protection

is

triggered, the unit will be shutdown and restart by input

or OUTEN on/off. The units operate normally once the

fault condition is removed.

Over-Temperature Protection

To provide additional over-temperature protection in a

fault condition, the unit is equipped with a thermal

shutdown circuit. The shutdown circuit engages when the

temperature

of

monitored

component

exceeds

approximately 121℃. It can be set with latching mode or

auto-restart mode by the external digital IC. The shutdown

unit will restart by input or OUTEN on/off while the

temperature lower than 113℃ (latching mode), or will

auto-restart while the temperature lower than 113℃

(auto-restart mode).