Rainbow-electronics MAX4987BE Manual de usuario descargar pdf (Pagina 5)

MAX4987AE/MAX4987BE

Overvoltage-Protection Controller

with USB ESD Protection

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Pin Description

PIN NAME FUNCTION

1IN

Voltage Input. Bypass IN with a 1µF ceramic capacitor as close to the device as possible to obtain

±15kV HBM ESD protection. No capacitor required to obtain ±2kV HBM ESD protection.

2 CD+ USB Data Line

3 GND Ground

4 CD- USB Data Line

Positive Supply-Voltage Input. V

is required only when USB signals are present.

6 EN Enable Active-Low Input. Drive EN low to enable the switch. Drive EN high to disable the switch.

7 ACOK

Open-Drain Adapter-Voltage Indicator Output. ACOK is driven low after the V

voltage is stable

between UVLO and OVLO for 30ms (typ). Connect a pullup resistor from ACOK to the logic I/O voltage

of the host system.

8 OUT Output Voltage. Output of internal switch.

EP EP Exposed Pad. Connect exposed pad to ground. Do not use EP as a sole ground connection.

OVERCURRENT

FAULT

CD+

CD-

CHARGE

PUMP

CONTROL

LOGIC

MAX4987AE/

MAX4987BE

ACOK

REFERENCE

OUT

GND

Functional Diagram

1 2 3 4 5 6 7 8 9 10

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Rainbow-electronics MAX4987BE Manual de usuario Pagina 5