ISL6291 Intersil Corporation, ISL6291 Datasheet
ISL6291
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ISL6291 Summary of contents
Page 1
... A V2P8 pin outputs a 2.8V reference voltage that can be used to bias other circuits indication for the adapter presence. The ISL6291 is packed in a thermally enhanced 5x5 QFN package. See the Technical Brief TB389 given in the Related Literature for more information related to the package ...
Page 2
... Block Diagrams VIN x 3 V2P8 REF IREF Current Source IMIN I SEN2 TOEN V2P8 V TMIN TEMP V TMAX 2 ISL6291 ISL6291 V POR Inputok 100000:1 V current CH mirror V MIN I V SEN RECHRG CHRG TEMP MON T rickle/CC I MIN + - MIN_I - LOGIC U.T. + SET S Q Charge - O. SET ...
Page 3
... Typical Application 5V W all Adapter µ ISL6291 ISL6291 VIN VBAT TOEN Ω Ω ISL6291 TEMP FAULT IREF STATUS IMIN E N V2P8 TIME GND µ TIME µ V2P8 C 2 Battery Pack IREF IMIN Ω ...
Page 4
... VIN > VBAT and EN = floating VIN V ISL6291 ISL6291 VBAT = 4.2V, charge current = 0.5A DROP 80kΩ, VBAT = V CHARGE IREF CH I TRICKLE I R pin = 80kΩ EOC IMIN V ISL6291-2 RECHRG V ISL6291-1 RECHRG V MIN V V2P8 = 2.8V TMIN V TMAX V RMV T FOLD G FOLD C = 15nF TIME Pin Voltage = 0.8V θ ...
Page 5
... This pin is pulled up to the internal 2.8V reference via a 10µA current source. 5 ISL6291 ISL6291 V2P8 (Pin 8) V2P8 is a 2.8V reference voltage output. V2P8 pin outputs a 2.8V voltage when the input voltage rises above the POR threshold and outputs zero voltage otherwise. This pin can be used as an adapter presence signal. A 0.1µ ...
Page 6
... It is not recommended to fast charge a Li-ion battery when the battery is deeply discharged, indicated by a low battery voltage. When the ISL6291 sees a battery voltage lower than the V Specifications, it forces 1/10 of the current in the constant current mode into the battery ...
Page 7
... During the constant current charge mode, the STATUS pin remains LOW and the FAULT pin remains HIGH. Constant Voltage Charge Mode The ISL6291 regulates the battery terminal voltage at V the constant voltage mode. As the battery continues being charged, the charge current starts to decrease, as shown in Figure 1 ...
Page 8
... Maximum power dissipation occurs when the battery is charged in the constant current mode. The advanced thermal management function of the ISL6291 frees users from the temperature rise concern. The ISL6291 adopts a current-foldback technique against the temperature rise. Under normal ...
Page 9
... The ISL6291 assumes that the thermistor is co-packed with the battery and is removed together with the battery. When the ISL6291 sees a voltage of 2.1V or higher on the TEMP pin, it assumes that the battery is removed. When the battery is removed, the charger stops and indicates a fault signal. A new charge cycle starts when a battery is inserted again ...
Page 10
... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 10 ISL6291 ISL6291 L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHB ISSUE C) MILLIMETERS ...