ISL6256A Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

ISL6256A

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Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

Datasheets,
Related Docs
& Simulations

Ordering Information

iBuy direct from Intersil	iBuy direct - out of stock	Request samples
Check distributor inventory	Available in RoHS/Pb-Free

Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

ISL6256AEVAL1Z

Active

Eval Board

N/A

ISL6256AEVAL2Z

Active

Eval Board

N/A

ISL6256AHAZ

Active

Hi-Temp Comm

28 Ld QSOP

3.93

ISL6256AHAZ-T

Active

Hi-Temp Comm

28 Ld QSOP T+R

3.93

ISL6256AHRZ

Active

Hi-Temp Comm

28 Ld QFN

4.00

ISL6256AHRZ-T

Active

Hi-Temp Comm

28 Ld QFN T+R

4.00

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

The ISL6256, ISL6256A is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries. High Efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting.

The constant output voltage can be selected for 2, 3 and 4 series Li-Ion cells with 0.5% accuracy over-temperature. It can also be programmed between 4.2V+5%/cell and 4.2V- 5%/cell to optimize battery capacity. When supplying the load and battery charger simultaneously, the input current limit for the AC adapter is programmable to within 3% accuracy to avoid overloading the AC adapter, and to allow the system to make efficient use of available adapter power for charging. It also has a wide range of programmable charging current. The ISL6256, ISL6256A provides outputs that are used to monitor the current drawn from the AC adapter, and monitor for the presence of an AC adapter. The ISL6256, ISL6256A automatically transitions from regulating current mode to regulating voltage mode.

ISL6256, ISL6256A has a feature for automatic power source selection by switching to the battery when the AC adapter is removed or switching to the AC adapter when the AC adapter is available. It also provides a DC adapter monitor to support aircraft power applications with the option of no battery charging.

Key Features

±0.5% Charge Voltage Accuracy (-10°C to +100°C)
±3% Accurate Input Current Limit
±3% Accurate Battery Charge Current Limit
±25% Accurate Battery Trickle Charge Current Limit
Programmable Charge Current Limit, Adapter Current Limit and Charge Voltage
Fixed 300kHz PWM Synchronous Buck Controller with Diode Emulation at Light Load
Overvoltage Protection
Output for Current Drawn from AC Adapter
AC Adapter Present Indicator
Fast Input Current Limit Response
Input Voltage Range 7V to 25V
Support 2-, 3- and 4-Cells Battery Pack
Up to 17.64V Battery-Voltage Set Point
Control Adapter Power Source Select MOSFET
Thermal Shutdown
Aircraft Power Capable
DC Adapter Present Indicator
Battery Discharge MOSFET Control
Less than 10μA Battery Leakage Current
Supports Pulse Charging
Pb-Free (RoHS Compliant)

Related Documentation

Datasheet(s):
Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers

Evaluation Board(s):
ISL6256AEVAL1Z Evaluation Board Setup Procedure ISL6256AEVAL2Z Evaluation Board Setup Procedure

Technical Homepage:
Automotive

Parametric Data


Input Voltage Range (V)		7 to 25

Input Current Limit Accuracy (%)		±3

Battery Charge Voltage (V)		4.2/Cell (2S, 3S, 4S)

Charging Voltage Accuracy (max) (%)		±0.5

Battery Charge Voltage Adjust (%)		±5/Cell

Charge Current Limit Accuracy (%)		±3 (CHLIM=2.0V)

Trickle Charge Current Limit Accuracy (%)		±25 (CHLIM=0.2V)

Automatic Trickle Charge (typ) (V)		No (Set by Host)

Battery Leakage Current (max) (µA)		10 (DCIN=0V, No System Load)

Automatic Power Source Selection		Yes

DC Adapter Detection		Yes

Topology		Fixed Frequency Synchronous Buck

Switching Frequency (typ) (kHz)		300

Max Duty Cycle (%)		99.6

Audible Noise		No

Operating Temp. Range (°C)		-10 to 100

Thermal Shutdown (°C)		150

Application Block Diagrams

Applications

Notebook, Desknote and Sub-notebook Computers
Personal Digital Assistant

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