ISL9230_1107 Datasheet, PDF (1/20 Pages) Intersil Corporation – High Power Li-Ion Charger W/I-Path Management

High Power Li-Ion Charger W/I-Path Management
ISL9230
The ISL9230 is a fully integrated high input voltage single-cell
Li-ion battery charger with power path management function.
This charger performs the CC/CV charge function required by
Li-ion batteries. The charger can withstand an input voltage up to
26V but is disabled when the input voltage exceeds 6.6V OVP
threshold. The input current limit and charge current are
programmable with external resistors. When the battery voltage
is lower than 3.0V, the charger preconditions the battery with
10% of the programmed charge current. When the charge
current reduces to the end-of-charge (EOC) current level during
the CV charge phase, the EOC indicator (CHG) will toggle to a
logic high to indicate the end-of-charge condition.
The ISL9230 uses separate power paths to supply the system
load and the battery. This feature allows the system to
immediately operate with a completely discharged battery. This
feature also allows the charge to terminate when the battery is
full while continuing to supply the system power from the input
source, thus minimizing unnecessary charge/discharge cycles
and prolonging the battery life.
Two indication pins (PG and CHG) allow simple interface to a
microprocessor or LEDs.
Features
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• Current Path Management Optimize for Charge and System
Currents
• Intelligent Timeout Interval Based on Actual Charge Current
• 1% Charger Output Voltage Accuracy
• Programmable Input Current Limit
• Programmable Charge Current
• NTC Thermistor Input
• Complies with USB Charger
• Charge Current Thermal Foldback for Thermal Protection
• Trickle Charge for Fully Discharged Batteries
• 26V Maximum Voltage at VIN Pin
• Power Presence and Charge Indications
• Ambient Temperature Range: -40°C to +85°C
• 16 Ld 3x3 TQFN Package
• Pb-Free (RoHS Compliant)
Applications
• Mobile Phones
• Blue-Tooth Devices
• PDAs
• MP3 Players
• Stand-Alone Chargers
• Other Handheld Devices
INPUT
C1
FROM
µP
VIN
VOUT
VBAT
ISL9230
CONT
CHGEN
IREF
R_IREF
ILIM
RILIM
TIME
R_TIME
GND
PG
CHG
NTC
AC/USB
MODE
TO SYS
C₃
R1
R₂
C₂
D1
} ^{FROM µP}
BATT
T
PART
DESCRIPTION
C₁ 4.7µF X5R ceramic capacitor
C₂ 1µF X5R ceramic capacitor
C3 4.7µF X5R ceramic capacitor
R_IREF (Application specific)
R_TIME (Application specific)
R_ILIM (Application specific)
R₁, R₂ 300 to 1kΩ, 5% resistor
D₁, D₂ LEDs for indication
FIGURE 1. TYPICAL APPLICATION CIRCUIT
July 22, 2011
1
FN7642.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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