Technical Reference Notes

APC18T12 Series

MODEL: APC18T12 SERIES

SHEET 5 OF 10

NOVEMBER 4, 2004 - REVISION 00

Electrical Specifications (continued)

SAFETY AGENCY / MATERIAL RATING / ISOLATION

Parameter

Device

Safety Approval

All

UL/cUL 60950, Flamability and Temperature Rise

Material Flammability Rating

All

UL94V-0

Input to Output Insulation Type

All

Non-Isolated

Figure 1. Measure input reflected-ripple current with a simulated source inductance L1

of 1 uH. Capacitor C1 offsets possible battery impedance. Measure current as shown

above.

Vo(+)

RESISTIVE

LOAD

SCOPE

COPPER STRIP

Vo(-)

Figure 2. Use C1 = 0.1

µF @50V X7R ceramic capacitor (connected an inch away

from the output terminals of the UUT), C2 = 10

µF @ 25V tantalum capacitor (2 inches

away from the output terminals of the UUT), C3 = 2x 150uF Polymer cap. Scope

measurement should be made using a BNC socket, positioned 3 inches away from

output terminals of the converter.

C1

C2

C3