(BATERAI) SMB137C.PDF

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SMB137C

http://www.summitmicro.com/

2156 3.0 4/17/2012

Programmable Switching Li+ Battery Charger with USB/AC Input, CurrentPathTM Manager,

TurboChargeTM Mode*, Low Battery Recovery*, AICL* and USB OTG/HDMI/MHL Support

INTRODUCTION

FEATURES

 Automatic Input Current Limit for universal USB/AC/DC

adapter compatibility*

 Optional automatic power source detection per latest

USB charging specification 1.2

 USB or AC input with automatic input selection and

programmable input current limiting (USB2.0 compliant)

 Up to 750mA charging output from 500mA USB port or

1500mA from AC adapter using proprietary

“TurboChargeTM Mode”

 Input/output CurrentPathTM control allows system

operation with deeply discharged/missing battery – no

start-up delay

 “Low Battery Recovery” mode for >500mA startup from

100mA USB port with deeply discharged cells – no

start-up delay*

 USB OTG, HDMI, MHL power support (up to 500mA @

+5V)

 Hardware programmable support for JEITA

 High-efficiency step-down regulator with 3MHz

switching

 +4.35 to +6.0V input voltage range

 +18V input tolerance (non-operating)

 High-accuracy float voltage regulation: 1.0%

 Digital programming of major parameters via I2

interface*

 Comprehensive protection features

 Tiny CSP-30 package

APPLICATIONS

 Smartphones

 Tablet PCs

 Portable Media Players

 Perfect Companion for MSM Chipsets

The SMB137C is a programmable single-cell lithium- ion/lithium-polymer battery charger designed for a variety of

portable applications. Unlike conventional charging devices,

the SMB137C’s high-efficiency switch-mode operation

eliminates the low charge current and thermal problems of

conventional linear solutions. In addition, the switching

architecture in conjunction with programmability enables

dramatically faster charging – TurboChargeTM mode - from

current limited inputs such as USB.

The SMB137C can switch between USB mode and AC

Adapter mode and works seamlessly in conjunction with a

USB controller. The device can manage two outputs

independently: battery charging and system power. This

allows immediate system operation even under missing/deeply

discharged battery conditions. The SMB137C can also run its

switching regulator in reverse to support “Low Battery

Recovery” mode (+4.17V @ 500mA) or USB “On the Go” and

HDMI/MHL power (+5.0V @ 500mA).

Charge control includes input current limit (supporting

USB2.0), trickle charge, pre-charge, constant current/constant

voltage, float voltage and termination/safety settings that are

fully programmable via a serial I2

C/SMBus and stored in non- volatile memory making the device truly a flexible solution.

The SMB137C also offers a wide variety of features that

protect the battery pack as well as the charger and input

circuitry: over-current, under/over-voltage, safety timers,

charge current/float voltage compensation and thermal

protection. Status can be monitored via the serial port for

charge state and fault conditions. In addition, the STAT output

can be used to signal charge status while the SYSOK output

can be used as a System OK indicator. Operating voltage is

specified from +4.35V to +6.0V with +18V non-operating input

tolerance. The SMB137C is available in an ultra-compact

CSP-30 package and is rated over the -30C to +85C

temperature range.

Figure 1 – SYSTEM APPLICATION

FEATURES & APPLICATIONS

Handheld Device

USB2.0

500mA

4.35V-5.5V

USB Charger

up to 1500mA

4.5V-6.0V (18V OVP)

I2C (optional)

System

SMB137C

Li- Ion

Charging Current

up to 1500mA

USB

System Output

up to 1500mA

GND VB US D- D+ ID

USB-OTG/

HDMI/MHL

5.0V @ 500mA

AC/DC Adapter

up to 1500mA

4.5V-6.0V

(18V OVP)

OTG/LBR/HDMI/MHL

750mA

AC/DC Input

700-1500mA

USB Input

100/500/700-1500mA "Ideal Diode"

Current

Total Sys. Output

>1500mA

LBR Output

4.17V @ 500mA

Using the SMB137C to charge a single cell Li+ battery from USB or AC Adapter power sources

*Patent Granted or Pending