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PDF ISL9205C Data sheet ( Hoja de datos )
| Número de pieza | ISL9205C | |
| Descripción | Li-ion Battery Charger | |
| Fabricantes | Intersil | |
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DATASHEET
Li-ion Battery Charger
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
The ISL9205, ISL9205A, ISL9205B, ISL9205C, and ISL9205D
are integrated single-cell Li-ion or Li-polymer chargers capable
of operating at an input voltage as low as 2.5V. The low
operating voltage allows the charger to work with a variety of
AC adapters.
The ISL9205 family operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
standard Li-ion charge profile, i.e., a Constant Current phase
followed by a Constant Voltage phase (CC/CV). The charge
current during the Constant Current phase is determined by
the external resistor connected to the IREF pin. When the
adapter output is a current-limited voltage source and the
current limit is smaller than the programmed constant current
of the IC, the ISL9205 operates as a pulse charger where the
charge current is determined by the current limit of the AC
adapter during the Constant Current phase. The ISL9205
operates in a linear mode during the constant voltage phase in
both adapter cases.
Features
• Complete charger for single-cell Li-ion/polymer batteries
• Integrated pass element and current sensor
• No external blocking diode required
• Low component count and cost
• 25mV voltage accuracy over-temperature and input voltage
range
• 15mV voltage accuracy at room temperature
• Programmable charge current
• Programmable end-of-charge current (ISL9205)
• Charge current thermal foldback for thermal protection
(Thermaguard)
• Trickle charge for fully discharged batteries
• Power presence and charge indications
The ISL9205 family incorporates Thermaguard, which protects
the IC against over-temperature. If the die temperature rises
above a typical value of +100°C, the thermal foldback
function reduces the charge current to prevent further
temperature rise. The ISL9205 includes an external
temperature monitoring function (not available in some
package options). A Negative Temperature Coefficient (NTC)
thermistor is connected between the TEMP pin and GND to
monitor the battery or ambient temperature. The ISL9205 also
includes a timer to set the time reference for various charge
time limits. The timer is programmable with an external
capacitor. Two logic inputs and two open-drain logic outputs
are available for controlling the charger and indicating the
charger status. The EN pin enables the charger. The TOEN pin
(available in ISL9205) enables the timeout function so that the
charge is terminated when the preset time limits have been
reached. The FAULT pin is an open-drain output which turns on
when a fault condition is encountered. The STATUS pin is also
an open-drain output which turns on when the charger is
delivering current.
• NTC interface (not available in some package options)
• Less than 3µA leakage current off the battery when no input
power attached or charger disabled
• Ambient temperature range: -40°C to +85°C
• DFN, QFN packages
• Pb-Free (RoHS compliant)
Applications
• Mobile phones
• Bluetooth devices
• PDAs
• MP3 players
• Stand-alone cradle or travel chargers
• Other handheld devices
Related Literature
• For a full list of related documents, visit our website
- ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
product pages
September 30, 2016
FN9252.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2007, 2010, 2016. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
ISL9205D Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
VIN
FAULT
STATUS
TIME
GND
EN
V2P8
IREF
DESCRIPTION
Input power source. Connect to a wall adapter.
An open-drain output indicating fault status. This pin is pulled to LOW under any fault
condition. When a fault condition occurs, the time counter will be reset. When the
charger is disabled, the FAULT pin outputs high impedance.
An open-drain output indicating charging and inhibit states. This pin is pulled LOW
when the charger is charging a battery. It will be turned into high impedance when
the charge current drops to IMIN. This high impedance state will be latched until a
recharge cycle or a new charge cycle starts. When the charger is disabled, the
STATUS pin outputs high impedance.
Determines the oscillation period by connecting a timing capacitor between this pin
and GND. The oscillator also provides a time reference for the charger.
The connection to system ground.
Enable logic input. Connect the EN pin to LOW to disable the charger or leave it
floating to enable the charger. There is an internal 400kΩ pull-up resistor at this pin.
A 2.8V reference voltage output. This pin provides a 2.8V voltage source when the
input voltage is above the POR threshold and outputs zero otherwise. The V2P8 pin
can be used as an indication for adapter presence.
The charge current programming and monitoring pin. Connect a resistor between
this pin and GND to set the charge current during the Constant Current phase, as
given by Equation 4:
IREF = R-----I-8-R--0--E----F--
A
(EQ. 4)
Where RIREF is in kΩ.
9
TEMP
Input for an external NTC thermistor. The TEMP pin is also used for battery removal
detection.
10 VBAT The connection to the battery. Typically a ceramic capacitor of minimum 1µF is
needed for stability when there is no battery attached. When a battery is attached,
only a 0.1µF ceramic capacitor is required.
Submit Document Feedback
5
FN9252.3
September 30, 2016
5 Page 
ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D
Functional Block Diagram
VIN
C1
R IREF IREF
EN
TEMP
TIME
GND
Q MAIN
TEMPERATURE
MONITORING
IT
IR
CURRENT
REFERENCES
IMIN= IR/10
QSEN
100000:1
CURRENT
MIRROR
ISEN
REFERENCES
INPUT_OK
+
VIN
+
C- A
CHRG
- V POR
++
- 80mV
+
VA -
V CH
ISEN
TRICKLE/FAST
+
- MIN_I
INPUT_OK
LOGIC
+
MINBAT -
VMIN
VRECHRG
+
-
RECHARGE
ESD DIODE
TEMP
MONITOR
STATUS
OSC
COUNTER
FAULT
VBAT
V2P8
VSEN
STATUS
FAULT
FIGURE 15. FUNCTIONAL BLOCK DIAGRAM
Submit Document Feedback 11
FN9252.3
September 30, 2016
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ISL9205C.PDF ] | |
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