DATASHEET ISL6292B FN9139 Rev.2.00 Li-ion/Li Polymer Battery Charger Nov.2.2020 The ISL6292B uses dual-mode charge technology to Features minimize the heat in a linear charger. The ISL6292B is a Complete Charger for Single-Cell Li-ion Batteries modification of the original ISL6292 and is optimized for cellular phone travel charger applications. The low-heat Integrated Pass Element and Current Sensor generation feature of the dual-mode charger enables the No External Blocking Diode Required charger IC to be placed inside the connector of the travel charger to completely remove the influence of the adapter Very Low Thermal Dual-Mode Operation cable on the charging performance. 1% Voltage Accuracy with Remote Sense Working with a current-limited ac/dc converter, the dual- Programmable Current Limit up to 1.5A mode charger charges a Li-ion battery with the same current profile as a traditional linear charger. The constant charge Programmable End-of-Charge Current current is determined by the current limit of the ac/dc Programmable Safety Timer converter. The constant output voltage is fixed at 4.2V. When the battery voltage is below 2.8V, the charger preconditions Drives a Tri-Color LED the battery with a low trickle-charge current. The charge Charge Current Thermal Foldback status is indicated by a tri-color LED. A safety timer prevents charging a dead battery for an excessively long period. NTC Thermistor Interface for Battery Temperature Monitor The ISL6292B also features a thermal foldback function that Two-Level Ambient Temperature Setting automatically reduces the charge current when the internal die temperature exceeds a 100C limit to prevent further Guaranteed to Operate at 2.65V After Start-Up temperature rise. This function removes the concern of Ambient Temperature Range: -20C to 70C thermal failure in the targeted space-limited applications. An Thermally-Enhanced QFN Packages ambient temperature monitoring circuit allows users to set two separate temperature limit levels, one for during charge QFN Package: and one for not during charge. The thermally-enhanced QFN - Near Chip Scale Package footprint, which improves package further improves the thermal performance of the PCB efficiency and has a thinner profile ISL6292B in space-limited applications. Pb-Free Available (RoHS Compliant) Related Literature Applications For a full list of related documents, visit our website Handheld Devices including Medical Handhelds ISL6292B product page PDAs, Cell Phones and Smart Phones Portable Instruments, MP3 Players Self-Charging Battery Packs Stand-Alone Chargers USB Bus-Powered Chargers FN9139 Rev.2.00 Page 1 of 12 Nov.2.2020- ISL6292B ISL6292B Overview Typical Application Input To Battery BAT BAT+ VIN C C 1 3 BAT- V2P9 VSEN R R 3 1 C ID 2 TEMP EN R C T 4 D D 2 1 R S DT R R 5 4 R 2 C TIM E TIME R RED IREF IREF GRN R IMIN GND IMIN C , C :1F X5R ceramic capacitor R :41.2k , 1% 1 3 1 R : TBD, value dependent on the T (2.3k for 20C) C , C :0.1F X5R ceramic capacitor 2 4 2 C : 22nF X5R or better timing capacitor R : ECTH-160808-103-J-3800HT, 10k at 25C, 5% TIME T D , D : dual-color (red and green) LED in one package R :1.33k , 1% 1 2 S R :80k , 1% R :10k, 5% (R and C are for improving ESD protection) IREF 3 3 4 R : 133k , 1% R , R :330, 5% IMIN 4 5 Block Diagram Q MAIN VIN BAT C 1 V2P9 References Temperature Q Monitoring SEN 100000:1 Current Mirror I T VIN I SEN VSEN Input OK + - V POR + IREF + + CA I R - 100mV - R IREF CHRG Current References + IMIN VA I - MIN R V IMIN CH + Trickle/Fast - Minbat V MIN I SEN + V RECHRG - MIN I + - V2P 8 Recharge RED Under Temp LOGIC TEMP NTC Interface Over Temp DT GRN OSC COUNTER TIME Input OK GND EN FN9139 Rev.2.00 Page 2 of 12 Nov.2.2020 V POR V CH V MIN V R ECHRG