JC050B1 datasheet(7/16 Pages) ETC1

7 / 16 page

Tyco Electronics Corp.

Data Sheet

October 1997

18 Vdc to 36 Vdc Input, 12 Vdc Output; 50 W to 100 W

JC050B, JC075B, JC100B Power Modules: dc-dc Converters;

Characteristic Curves (continued)

8-1243 (C).b

Figure 9. Typical JC100B Converter Efficiency vs.

Output Current at Room Temperature

8-1266 (C)

Figure 10.Typical Start-Up from Remote On/Off

JCxxxB1; IO = Full Load

Test Configurations

8-203 (C).l

Note:Measure input reflected-ripple current with a simulated source

inductance (LTEST) of 12 µH. Capacitor CS offsets possible

battery impedance. Measure current as shown above.

Figure 11. Input Reflected-Ripple Test Setup

8-513 (C).d

Note:Use a 1.0 µF ceramic capacitor and a 10 µF aluminum

or tantalum capacitor. Scope measurement should be

made using a BNC socket. Position the load between

51 mm and 7 6mm ( 2in .an d 3in.) from the module.

Figure 12. Peak-to-Peak Output Noise

Measurement Test Setup

OUTPUT CURRENT, IO (A)

18 V

28 V

36 V

0 V

TIME, t (5 ms/div)

TO OSCILLOSCOPE

12 µH

CS 220 µF

ESR < 0.1

Ω

@ 20 ˚C, 100 kHz

VI(+)

VI(–)

BATTERY

33 µF

CURRENT

PROBE

LTEST

ESR < 0.7

Ω

@ 100 kHz

VO(+)

VO(–)

1.0 µF

RESISTIVE

LOAD

SCOPE

COPPER STRIP

10 µF

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