API9221

Document number: DS32204 Rev. 3 - 3

1 of 16

www.diodes.com

June 2016

© Diodes Incorporated

API9221

CAR/WALL OR USB SUPPLY INPUT LITHIUM BATTERY CHARGER

WITH OVP USB BYPASS AND 10mA LDO

Description

The API9221 has two supply inputs for highly integrated

portable applications, enabling charging from a USB host,

wall adapter, or car adapter.

valid supply is connected to either VUSB or VDC. The

higher charge current option from VDC will take priority if

both supplies are connected.

The host controller can

API9221 implements the constant current/constant voltage

(CC/CV) charge algorithm for Lithium based battery cells.

The connected cell will be charged to 4.2V with an

accuracy of 1% over the entire temperature range.

The

termination current is programmable via an external

reached, and is reset by

EN , power off, or battery below

3.9V. The maximum charge current can be programmed

The API9221 comes with several protection features. To

prevent system damage, the VUSB pin uses over voltage

protection (OVP) at 5.4V, and the VDC OVP is at 6.9V.

Above these levels, the non-operating device is protected

against damage up to 28V. For control and system start-up

the API9221 has a current limited linear regulator.

To protect the chip against excessive power dissipation,

temperature monitoring is integrated, which folds back the

current to a safe level. As the temperature rises, this fold-

back begins at +125°C without completely interrupting

charging.

Applications

•

Handheld Consumer Devices

•

Cell Phones, PDAs, MP3 Players

•

Handheld Test Equipment

•

Digital Still Cameras

•

Multimedia Players

Pin Assignments

VDC

VUSB

PPR

CHG

EN

IMIN

VDC_LDO

BAT

USB_BYP

IVDC

GND

IUSB

(Top View)

U-DFN4030-12

1

2

3

4

5

6

12

11

10

9

8

7

Exposed Pad

Features

•

Linear Lithium Ion / Lithium Polymer charging IC

•

Supplied from USB Host or Car/Wall Adapter

•

Overvoltage Protection USB: 5.4V, Wall:6.9V

•

Supply Inputs Safe up to 28V

•

Fast Charging with Maximum Current of 1.2A

•

Integrated Linear Regulator of 4.9V at 10mA with

Current Limit

•

Separate Resistor-Programmable Charging

Current for Wall and USB

•

Resistor Programmable End-Of-Charge

•

Current Limit on USB Bypass Path

•

Indicator Pins for Charging and Power Present

•

Enable Pin to Enable Host Control Charging

•

Reverse Current Protection

•

Thermal Protection

•

U-DFN4030-12

: Available in “Green” Molding Compound

(No Br, Sb)



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about

Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

NOT RECOMMENDED FOR NEW DESIGN

–

NO ALTERNATE PART