ISL6256AHAZ-T Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Fabricante

ISL6256AHAZ-T

Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

Renesas Electronics 

ISL6256, ISL6256A

EN Pin

This pin stays high at enable mode and low at idle mode and is

relatively robust. Enable signals should refer to the signal

ground.

DCIN Pin

This pin connects to AC adapter output voltage, and should be

less noise sensitive.

Copper Size for the Phase Node

The capacitance of PHASE should be kept very low to

minimize ringing. It would be best to limit the size of the

PHASE node copper in strict accordance with the current and

thermal management of the application.

Identify the Power and Signal Ground

The input and output capacitors of the converters, the source

terminal of the bottom switching MOSFET PGND should

connect to the power ground. The other components should

connect to signal ground. Signal and power ground are tied

together at one point.

Clamping Capacitor for Switching MOSFET

It is recommended that ceramic caps be used closely

connected to the drain of the high-side MOSFET, and the

source of the low-side MOSFET. This capacitor reduces the

noise and the power loss of the MOSFET.

FN6499 Rev 3.00

September 14, 2010

Page 24 of 26

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