Rainbow-electronics MAX4981 Manual do Utilizador descarregar pdf (Página 9)

Human Body Model

Figure 3 shows the Human Body Model, and Figure 4

shows the current waveform it generates when dis-

charged into a low impedance. This model consists of

a 100pF capacitor charged to the ESD voltage of inter-

est that is then discharged into the device through a

1.5kΩ resistor.

Chip Information

PROCESS: BiCMOS

MAX4978–MAX4981

Overvoltage Protector with

Active Current Limit

_______________________________________________________________________________________ 9

OUTIN

CONTROL

LOGIC

MAX4978/

MAX4979

BANDGAP

REFERENCE

5V AC

ADAPTER

C0NTROL

CHARGER

CHARGE

PUMP

OVLO

UVLO

1μF

GND

1kΩ

SDT

PHONE

LOADS

AC-DC

CONVERTER

~0.5Ω

LONG WIRE

RESISTANCE

nFET

Figure 2. Typical Application Circuit with SDT

CHARGE CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

1MΩ

1.5kΩ

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 3. Human Body ESD Test Model

100%

90%

36.8%

TIME

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

AMPERES

Figure 4. Human Body Current Waveform

1 2 3 4 5 6 7 8 9 10

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