Product Summary

The ISL6251 is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries and NiMH 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 ISL6251 low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting. The applications of the ISL6251 include Notebook, Desknote and Sub-notebook Computers and Personal Digital Assistant.

Parametrics

ISL6251 absolute maximum ratings: (1)DCIN, CSIP, CSON to GND: -0.3V to +28V; (2)CSIP-CSIN, CSOP-CSON: -0.3V to +0.3V; (3)PHASE to GND: -7V to 30V; (4)BOOT to GND: -0.3V to +35V; (5)BOOT-PHASE, VDD-GND, VDDP-PGND, ACPRN to GND: -0.3V to 7V; (6)ACSET to GND: -0.3V to VDD+0.3V; (7)ICM, ICOMP, VCOMP to GND: -0.3V to VDD+0.3V; (8)ACLIM, CHLIM, VREF, CELLS to GND: -0.3V to VDD+0.3V; (9)EN, VADJ, PGND to GND: -0.3V to VDD+0.3V; (10)UGATE: PHASE-0.3V to BOOT+0.3V; (11)LGATE: PGND-0.3V to VDDP+0.3V.

Features

ISL6251 features: (1)±0.5% Charge Voltage Accuracy (-10 to 100℃); (2)±3% Accurate Input Current Limit; (3)±5% Accurate Battery Charge Current Limit; (4)±25% Accurate Battery Trickle Charge Current Limit; (5)Programmable Charge Current Limit, Adapter Current Limit and Charge Voltage; (6)Fixed 300kHz PWM Synchronous Buck Controller with Diode Emulation at Light Load; (7)Output for Current Drawn from AC Adapter; (8)AC Adapter Present Indicator; (9)Fast Input Current Limit Response; (10)Input Voltage Range 7V to 25V; (11)Support 2, 3 and 4 Cells Battery Pack; (12)Up to 17.64V Battery-Voltage Set Point; (13)Thermal Shutdown; (14)Support Pulse Charging; (15)Less than 10μA Battery Leakage Current; (16)Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc.

Diagrams

ISL6251 functional block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
ISL6251
ISL6251

Other


Data Sheet

Negotiable 
ISL6251A
ISL6251A

Other


Data Sheet

Negotiable 
ISL6251AHAZ
ISL6251AHAZ


IC BATTERY CHARGER CTRLR 24-QSOP

Data Sheet

0-500: $2.71
ISL6251AHAZ-T
ISL6251AHAZ-T


IC BATTERY CHARGER CTRLR 24-QSOP

Data Sheet

0-2500: $2.14
ISL6251AHRZ
ISL6251AHRZ


ICBATTERY CHARGER CTRLR 28-QFN

Data Sheet

0-600: $2.71
ISL6251AHRZ-T
ISL6251AHRZ-T


ICBATTERY CHARGER CTRLR 28-QFN

Data Sheet

0-6000: $2.14
ISL6251HAZ
ISL6251HAZ


IC BATTERY CHARGER CTRLR 24-QSOP

Data Sheet

0-500: $2.71
ISL6251HAZ-T
ISL6251HAZ-T


IC BATTERY CHARGER CTRLR 24-QSOP

Data Sheet

0-2500: $2.14