API9221_16 Datasheet, PDF (1/16 Pages) Diodes Incorporated – CAR/WALL OR USB SUPPLY INPUT LITHIUM BATTERY CHARGER WITH OVP USB BYPASS AND 10mA LDO

NOT RECOMMENDED FOR NEW DESIGN –
NO ALTERNATE PART
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.
The PPR pin indicates to a host controller that a safe and
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
control the state of charging via the enable pin _EN . The
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
resistor, R_IMIN.
The CHG pin indicates when the termination current is
reached, and is reset by EN , power off, or battery below
3.9V. The maximum charge current can be programmed
independently via the resistors R_IUSB and R_IVDC.
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
(Top View)
VDC 1
VUSB 2
PPR ³
CHG 4
EN 5
IMIN 6
12 VDC_LDO
11 _BAT
10 USB_BYP
Exposed Pad
9 IVDC
8 GND
7 IUSB
Features
U-DFN4030-12
• 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.
API9221
Document number: DS32204 Rev. 3 - 3
1 of 16
www.diodes.com
June 2016
© Diodes Incorporated