SMB329B SUMMIT Microelectronics, Inc:, SMB329B Datasheet

SMB329B

Manufacturer Part Number

SMB329B

Description

Programmable Switch-mode, Li+ Battery Charger With Turbocharge? Mode, Usb ?on- The- Go? Power, Usb Power Source Detection And Automatic Input Current Limiting

Manufacturer

SUMMIT Microelectronics, Inc:

Datasheet

1.SMB329B.pdf (1 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SMB329BET-1151Y

Manufacturer:

SUMMIT

Quantity:

20 000

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Programmable Switch-mode, Li+ Battery Charger with TurboCharge™ Mode, USB “On- the-

Go” Power, USB Power Source Detection and Automatic Input Current Limiting

•

Applications

Figure 1 – Using the SMB329B to charge a single cell Li+ battery from USB or AC Adapter power sources.

FEATURES & APPLICATIONS

SYSTEM APPLICATION

* Patents pending

Automatic input current limit *

Optional automatic power source detection per latest USB

charging specification 1.0

USB or AC input with programmable input current limiting

Up to 1.15A continuous charging current from AC adapter

Up to 750mA charging current from 500mA USB port using

automatic TurboCharge™ mode *

+4.35 to +6.2V input range (+20V input protected)

USB “On-the-Go” Power support for USB OTG enabled

devices (+5V reverse output @ 500mA)

50mA SYSON output for “dead battery” boot-up

Analog output voltage for direct charge current measurement

Reverse current blocking

High-efficiency 3MHz current-mode step-down regulator

Integrated frequency compensation and power MOSFETs

High-accuracy float voltage regulation: 1%

Pre-charge and complete-charge safety timers

Battery pack thermal monitor

Digital programming of all major parameters via I

(One-time programmable for default, non-volatile settings)

Status register monitors and flags charger operation

1.95mm x 2.22mm CSP-20 package (0.4mm pitch lead-free)

•

2.5G/3G/GSM/CDMA Phones

Smartphones/PDAs

Portable Media Players

Portable GPS Terminals

Handheld Game Consoles

Fast charge voltage threshold, float voltage

Pre-charge, fast charge, termination current

Charge in-progress/termination

Charge timer fault

Over-current limiting

UV/OV detection/shutdown

USB

300-1800mA

USB

4.5V-6.0V

4.35V-5.5V

AC/DC

http://www.summitmicro.com/

500mA

USB

C interface

2143 2.1 12/10/2009

Output 500mA

USB-OTG

SMB329B

Handheld System

The SMB329B is a programmable single-cell lithium-ion/lithium-polymer

battery charger designed for a variety of portable applications. The device

provides a simple and efficient way to charge high-capacity Li-Ion batteries

via a USB or AC adapter input. Furthermore, the SMB329B is able to

automatically adjust input current level by detecting the AC/DC adapter’s

maximum stable output current, thereby automatically matching wall

adapter to electronic device.

Unlike conventional devices, the SMB329B’s high-efficiency, switch-mode

operation eliminates the thermal problems of conventional linear solutions.

Also the buck converter architecture effectively multiplies the input current

to increase charge rate for the Li+ cell and uses current limited supplies like

USB more efficiently. A 50mA SYSON switch output provides a bypass

power supply to boot the system for “instant on” without waiting for charging

in case of a dead battery. The SMB329B product also supports USB On-

the-Go devices by providing the required USB-OTG +5V power supply

using the Li-Ion battery as a source.

The SMB329B can switch between USB mode and AC Adapter mode and

works seamlessly in conjunction with a USB controller. Furthermore, it

offers the option to automatically differentiate an AC/DC wall adapter from a

USB2.0 hub via the D+/D- USB lines, making the device compatible with

USB battery charging specification 1.0.

Charge control includes qualification, trickle-charge, pre-charge, constant

current/constant voltage, float voltage and termination/safety settings that

are fully programmable via a serial I2C/SMBus, making the device truly a

flexible solution. Fast charge current level can be set via I2C (limited in USB

mode to ensure 100mA or 500mA input). Built-in is reverse-current blocking

to prevent inadvertent cell discharge. The SMB329B offers the option to

automatically charge the battery only when the battery voltage is below a

selectable

integrated power FETs contribute to a reduced external component count

and size.

The SMB329B also offers several features that protect the battery pack as

well as the charger and input circuitry: over-current, under/over-voltage and

thermal protection. Ultra-accurate, 1% battery float voltage control improves

battery capacity utilization. The STAT output is an interrupt to flag various

status/flag events (programmable selection) and the status register can be

read via the serial port. The SMB329B is available in an ultra-compact lead-

free uCSP-20 and in a 4x4 QFN-24 package and is rated over the –30C to

+85C temperature range.

INTRODUCTION

"Instant On" Power 50mA

Total Output

450-1150mA

I2C

“dead-battery”

Li-Ion

To System

ADC

System

USB

threshold.

Preliminary Information

High-frequency

SMB329B

operation

and

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