ISL9518 Narrow VDC Regulator/Charger with SMBus Interface

ISL9518

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Narrow VDC Regulator/Charger with SMBus Interface

Datasheets,
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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 $

ISL9518HRTZ

Active

Hi-Temp Comm

28 Ld TQFN

6.33

ISL9518HRTZ-T

Active

Hi-Temp Comm

28 Ld TQFN T+R

6.33

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 ISL9518, ISL9518A are highly integrated Narrow VDC system voltage regulators and battery charger controllers. Operating parameters are programmable over the System Management Bus (SMBus). The ISL9518, ISL9518A are designed for applications where the system power source is either the battery pack or the output of the regulator/charger. This makes the max voltage to the system equal to the max battery voltage instead of the max adapter voltage. The ISL9518, ISL9518A also include a system to control trickle charging deeply discharged batteries while maintaining system voltage at a user defined minimum. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency and AC-adapter boosting prevention. The ISL9518, ISL9518A can charge two to four series connected Lithium-ion cells, at up to 8A charge current. The ISL9518 has default settings for 2-cell systems and the ISL9518A has default settings for 3-cell systems. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy.

The ISL9518, ISL9518A provide two open drain digital outputs that indicate the presence of the AC adapter and trickle charge state. Trickle charge state and AC adapter present indicators are also available via SMBus. The ISL9518, ISL9518A also provide two analog outputs that indicate the adapter current and battery discharge current with 4% accuracy.

Key Features

±0.5% System Voltage Accuracy (-10°C to +100°C)
±3% Accurate Input Current Limit
±3% Accurate Battery Charge Current Limit
Switching Frequency can be Reduced via SMBus for Higher Efficiency at Light Load Conditions
Trickle Charge System for Deeply Discharged Batteries
- Automatic Trickle Charge Current (256mA)
- Holds Minimum Voltage to System
SMBus 2-Wire Serial Interface
Battery Short Circuit Protection
Fast System-Load Transient Response
Monitor Outputs
- Adapter Current (2.5% Accuracy)
- Trickle Charge Mode Indicator
- AC-Adapter Present Indicator
11-Bit Max System Voltage Setting
7-Bit Min System Voltage Setting
6-Bit Charge Current Setting
6-Bit Adapter Current Setting
Over 8A Battery Charger Current
Over 8A Maximum Adapter Current
+8V to +22V Adapter Voltage Range
Pb-Free (RoHS Compliant)

Related Documentation

Datasheet(s):
Narrow VDC Regulator/Charger with SMBus Interface

Parametric Data


Input Voltage Range (V)		8 to 22

Input Current Limit Accuracy (%)		±3

Battery Charge Voltage (V)		1.024 to 19.2 in 16mV Steps

Charging Voltage Accuracy (max) (%)		.5

Battery Charge Voltage Adjust (%)		16mV steps

Charge Current Limit Accuracy (%)		3

Trickle Charge Current Limit Accuracy (%)		128mA to 384mA

Automatic Trickle Charge (typ) (V)		4.5

Battery Leakage Current (max) (µA)		25 (DCIN=0V, No System Load)

Automatic Power Source Selection		Yes

DC Adapter Detection		Yes

Topology		Adj Frequency Buck

Switching Frequency (typ) (kHz)		400, 100, 50

Max Duty Cycle (%)		90

Audible Noise		No

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

Thermal Shutdown (°C)		150

Application Block Diagrams

Notebook Computers

Applications

Notebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries

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Parametric Table

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