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Description

The PM6610 is a high efficiency battery charger

with SMBus communication interface. It includes

a synchronous switching DC-DC converter with

N-channel high-side and low-side Power

MOSFET drivers. The possibility to set the

switching frequency with SMBus by choosing one

of the two preset values of 350 kHz or 700 kHz

assures the best trade-off between power

conversion efficiency and application component

cost and PCB size.

Integrated loop compensation network and softstart allow the reduction of the number of external

components.

The PM6610 integrates 2 charge pumps to drive

N-channel BATFET and RBFET MOSFETs.

The SMBus communication interface is used to

set the battery charge current and voltage.

The PM6610 charges 2 to 4-series Li-Ion or

LiFePO4 cells, for mobile PC applications. It is

available on a 16-pin, 3x3 mm, QFN package.

Features

■ Buck converter

– Synchronous buck converter with Nchannel high-side, low-side Power

MOSFET integrated drivers

– 350 kHz or 700 kHz switching frequency,

selectable with SMBus

– AC adapter input voltage range 9 V - 24 V

– 5 V bias input voltage supply

– Battery charge voltage range 2.5 V - 18 V

– ±0.5 charge voltage accuracy

– 0.1 cell charge voltage resolution

– ±3 charge current accuracy

– Overvoltage, overcurrent protection

– Battery, inductor, Power MOSFET shortcircuit protection

– Internal loop compensation network

– Integrated soft-start

■ Selector

– N-channel BATFET MOSFET driver

– N-channel RBFET MOSFET driver

■ System

– 1 mA quiescent supply current

– 17 μA - 35 μA sleep mode current (BATFET

charge pump OFF - ON)

– Thermal shutdown

Application

■ Mobile PC:

– UMPC/MID and tablets

– Netbook and notebook computers