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PDF API9221 Data sheet ( Hoja de datos )
| Número de pieza | API9221 | |
| Descripción | Car/Wall or USB Supply Input Lithium Battery Charger | |
| Fabricantes | Diodes | |
| Logotipo |  |
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API9221www.DataSheet4U.com
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, RIMIN.
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 RIUSB and RIVDC.
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
Exposed Pad
12 VDC_LDO
11 BAT
10 USB_BYP
9 IVDC
8 GND
7 IUSB
DFN4030-12
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
• DFN4030-12: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Note 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS
exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
DC Input
USB Input
OFF
ON
VDC
VUSB
VDC_LDO
BAT
To Battery
API9221 USB_BYP
EN
PPR
GND
CHG
IMIN IUSB IVDC
To MCU
I/O_VDD I/O_VDD
LDO Output
USB_BYP
API9221
Document number: DS32204 Rev. 1 - 2
1 of 17
www.diodes.com
May 2010
© Diodes Incorporated
1 page  
API9221www.DataSheet4U.com
Car/Wall or USB Supply Input Lithium Battery Charger
with OVP USB Bypass and 10mA LDO
Electrical Characteristics
API9221 is tested at VDC = VUSB = 5V at an ambient temperature of +25°C unless otherwise noted.
Symbol
Parameter
Test Conditions
Min Typ.
CHARGER POWER-ON THRESHOLDS
VPOR
VPOF
Rising VUSB/VDC Threshold
Falling VUSB/VDC Threshold
3.4 3.9
3.2 3.7
INPUT VOLTAGE OFFSET
VBAT = 4.0V, use
VOSHC
Rising VDC or VUSB, relative to CHG pin to indicate
VBAT
the comparator
-
150
output
VOSLC
Falling VDC or VUSB, relative to
VBAT
VBAT = 4.0V, use
CHG pin to indicate
the comparator
output
20
80
STANDBY CURRENT
ISTANDBY
IVDC
IVUSB
BAT Pin Sink Current
VDC Pin Supply Current
VUSB Pin Supply Current
EN = HIGH or both
inputs are floating
- 0.05
EN = HIGH, ILDO = 0 - 380
EN = HIGH,
USB_BYP
- 330
disconnected
IVDC_VUSB
VDC/VUSB Pin Supply Current
EN = LOW, ILDO = 0,
USB_BYP
-
0.63
disconnected
VOLTAGE REGULATION
VBATMAX
Final Output Voltage, BAT Pin
rDS(ON)_VDC VDC Linear ON-resistance
rDS(ON)_VUSB VUSB Linear ON-resistance
CHARGE CURRENT
Load = 10mA
Load = 10mA
(TJ = +25°C)
VBAT =3.8V, IVDC =
0.3A, (TJ = +25°C)
VBAT = 3.8V, IUSB =
0.3A, (TJ = +25°C)
4.158
4.174
-
-
4.2
4.2
550
550
VIVDC
IVDC_CHRG
IVDC_TRKL
VDC Pin Output Voltage
VDC Constant Current
VDC Trickle Charge Current
VBAT = 3.8V
RIVDC = 12.4kΩ, VBAT
= 2.7V to 3.8V
RIVDC = 12.4kΩ, VBAT
= 2.2V, given as a %
of the IVDC CHARGE
1.22
450
15
1.25
550
17
Max Unit
4.2 V
4.0 V
250 mV
- mV
0.5 µA
460 µA
400 µA
1.1 mA
4.242
4.226
-
-
V
V
mΩ
mΩ
1.28 V
600 mA
19 %
API9221
Document number: DS32204 Rev. 1 - 2
5 of 17
www.diodes.com
May 2010
© Diodes Incorporated
5 Page 
API9221www.DataSheet4U.com
Car/Wall or USB Supply Input Lithium Battery Charger
with OVP USB Bypass and 10mA LDO
Functional Description (Continued)
Fault Summary and Protection
Overvoltage protection: If VDC is greater than OVPVDC (6.9V), the VDC charging path is turned off until VDC falls
below OVPVDC - HOVPVDC, where HOVPVDC is the OVP hysteresis. Similarly, if VUSB is greater than OVPVUSB
(5.4V), the USB charging path is turned off until VUSB falls below OVPVUSB – HOVPVUSB.
USB_BYP current limit: The USB_BYP load current is limited to 400mA (nominally).
USB_BYP reverse blocking: If the voltage at USB_BYP is greater than VUSB, the USB bypass path is turned off.
BAT reverse blocking: If the battery voltage is greater than either VDC or VUSB, the relevant charge path is
turned off.
VDC_LDO reverse blocking: If the voltage at VDC_LDO is greater than VDC, the linear regulator is turned off.
Thermal protection: When the junction temperature reaches 125°C, a current foldback circuit is activated. This
effectively limits the power dissipation to a safe level.
Power Supply Filtering and Stability
At each of the inputs VDC and VUSB, a local decoupling capacitor is required to be connected to GND. A
minimum value of 1µF is recommended, ceramic type X7R. (The USB standard sets an upper bound of
capacitance somewhat larger than this.)
At the linear regulator output VDC_LDO, a local decoupling capacitor is required, connected to GND. A value of
1µF is recommended, ceramic type X7R.
At the battery connection BAT, a local decoupling capacitor is required, connected to GND. A value of 1µF is
recommended, ceramic type X7R.
API9221
Document number: DS32204 Rev. 1 - 2
11 of 17
www.diodes.com
May 2010
© Diodes Incorporated
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet API9221.PDF ] | |
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