ISL6253 Intersil Corporation, ISL6253 Datasheet
ISL6253
Available stocks
Related parts for ISL6253
ISL6253 Summary of contents
Page 1
... Data Sheet Highly Integrated Battery Charger for Notebook Computers The ISL6253 is a highly integrated battery charger controller for Li-Ion/Li-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 ...
Page 2
... Pinouts ISL6253 (28 LD QFN) TOP VIEW CELLS 2 3 ICOMP VCOMP 4 5 ICM VREF 6 CHLIM ISL6253 CSOP 20 CSIN 19 CSIP 18 SGATE 17 BGATE 16 PHASE 15 UGATE 13 14 ISL6253 (28 LD QSOP) TOP VIEW DCIN DCPRN 1 28 VDD ACPRN 2 27 ...
Page 3
... TRIP POINTS ACSET Threshold ACSET Input Bias Current Hysteresis ACSET Input Bias Current ACSET Input Bias Current DCSET Threshold 3 ISL6253 Thermal Information Thermal Resistance QFN Package (Notes 4, 6 QSOP Package (Note ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1 Junction Temperature Range .-10°C to +150°C Operating Temperature Range . . . . . . . . . . . . . . . .-10°C to +100°C Storage Temperature .-65° ...
Page 4
... Input Common Mode Range Input Offset Voltage Input Bias Current at CSIP Input Bias Current at CSIN ADAPTER CURRENT LIMIT THRESHOLD CSIP to CSIN Input Full Scale Sense Voltage 4 ISL6253 ≤ 125°C, unless otherwise noted. (Continued) J TEST CONDITIONS DCSET ≥ 1.26V DCSET < 1.26V ...
Page 5
... Thermal Shutdown Temperature Hysteresis NOTE: 7. This is sum of currents in these pins (CSIP, CSIN, BOOT, UGATE, PHASE, CSOP and CSON) tied together to 18V. EN, ACSET, DCSET, VADJ, CELLS, ACLIM, CHLIM, VDD, DCIN = 0. 5 ISL6253 ≤ 125°C, unless otherwise noted. (Continued) J TEST CONDITIONS ACLIM = GND, or VREF ...
Page 6
... FIGURE 3. BATTERY CHARGE V-I CHARACTERISTICS INDUCTOR CURRENT 1A/DIV VDCIN 10V/DIV BATTERY VOLTAGE 10V/DIV CHARGE CURRENT 1A/DIV t: 10ms/DIV CHARGE CURRENT: 2.6A INPUT VOLTAGE STEP: 18.0V TO 25V LOAD CURRENT: 1A FIGURE 5. LINE TRANSIENT RESPONSE 6 ISL6253 = 25°C, unless otherwise noted. A 0.01 VDCIN = 20V VDD = 5.075V -0.01 -0.02 -0.03 -0. 17.0 LOAD CURRENT 5A/DIV 16 ...
Page 7
... CURRENT 2A/DIV t: 5µs/DIV FIGURE 9. AC ADAPTER REMOVAL VPHASE 10V/DIV VCSON 10V/DIV INDUCTOR CURRENT 2A/DIV t: 20µs/DIV FIGURE 11. BATTERY REMOVAL 7 ISL6253 (Continued) = 25°C, unless otherwise noted. A SYSTEM BUS VOLTAGE INDUCTOR CURRENT 2A/DIV LOAD CURRENT = 2A INDUCTOR CURRENT 2A/DIV BATTERY VOLTAGE ...
Page 8
... UGATE UGATE is the high side MOSFET gate drive output. SGATE SGATE is the AC adapter power source select output. The SGATE pin drives an external P-MOSFET used to switch to AC adapter as the system power source. 8 ISL6253 (Continued) = 25°C, unless otherwise noted. A PHASE 10V/DIV INDUCTOR LGATE CURRENT 0 ...
Page 9
... ICM ICM is the adapter current output. The output of this pin produces a voltage proportional to the adapter current. 9 ISL6253 ISL6253 PGND PGND is the power ground. Connect PGND to the source of the low side MOSFET for the low side MOSFET gate driver. VDD VDD is an internal LDO output to supply the IC analog circuit. Connect a 1µ ...
Page 10
... BUFFER - - VCOMP VOLTAGE VADJ SELECTOR 3.1V/CELL - CELLS - VDD VDD Charge Current Set CHARGE CURRENT SET VREF Reference REFERENCE GND FIGURE 16. BLOCK DIAGRAM 10 ISL6253 CSIP CSIN DCSET DCPRN + + 1.26V 1.26V - - CA1 CA1 DCIN CSON BIAS Bias REGULATOR Regulator - - gm3 gm3 + + MIN ...
Page 11
... GND FIGURE 17. TYPICAL APPLICATION CIRCUIT 1 11 ISL6253 0.1µF CSON CSON SGATE SGATE DCIN DCIN CSIP CSIP ACSET ACSET C3 ISL6253 0.1µF ISL6253 VDDP VDDP CSIN CSIN R7 R7 R3: 18Ω 4.7 4.7Ω VDDP VDDP VDD VDD BOOT BOOT D2 D2 ACPRN ACPRN UGATE UGATE ...
Page 12
... R10,R11 R12:10k R12:10k AVDD/VREF AVDD/VREF 10nF 10nF 10k 10k SCL SCL SDL SDL A/D INPUT A/D INPUT GND GND FIGURE 18. ISL6253 CONTROLLED TYPICAL APPLICATION 2 12 ISL6253 0.1µF CSON CSON DCIN DCIN SGATE SGATE ACSET ACSET CSIP CSIP DCSET DCSET C3 ...
Page 13
... Theory of Operation Introduction The ISL6253 includes all of the functions necessary to charge cell Li-Ion and Li-polymer batteries. A high efficiency synchronous buck converter is used to control the charging voltage and charging current amps. The ISL6253 has input current limiting and analog inputs for setting the charge current and charge voltage ...
Page 14
... By using the input current limiter, the current capability of the AC adapter can be lowered, reducing system cost. The ISL6253 limits the battery charge current when the input current-limit threshold is exceeded, ensuring the battery CELL NUMBER charger does not load down the AC adapter voltage. An ...
Page 15
... BGATE (see Figure 18) is turned off and keeps the battery from supplying the system bus. The comparator looking at CSON and DCIN has 300mV of hysteresis to avoid chattering. For aircraft power applications the ISL6253 is only able to support 2S and 3S battery packs when disabling (EQ. 6) the charging function based on DCPRN and ACPRN signals ...
Page 16
... The maximum efficiency is achieved by selecting a high side MOSFET that has the conduction losses equal to the switching losses. Ensure that : the ISL6253 LGATE gate driver can supply sufficient gate Peak current to prevent it from conduction, which is due to the (EQ. 10) injected current into the drain-to-source parasitic capacitor ...
Page 17
... Substituting I = 26mA and f GATE into the above equation yields a total gate charge which should be less than 86nC; therefore, the ISL6253 easily drives the battery charge current up to 10A. Input Capacitor Selection The input capacitor absorbs the ripple current from the ...
Page 18
... where R is the trans-resistance in current loop usually equal to the product of the current sensing resistance of the current amplifier. For ISL6253, R The voltage gain with open current loop is ...
Page 19
... ISL6253 PCB Layout Considerations Power and Signal Layer Placement on the PCB As a general rule, power layers should be close together, either on the top or bottom of the board, with signal layers on (EQ ...
Page 20
... This pin stays high at enable mode and low at idle mode, and is relatively robust. Enable signals should refer to the signal ground. 20 ISL6253 DCIN PIN This pin connects to AC adapter output voltage, and should be less noise sensitive. Copper Size for the Phase Node The capacitance of PHASE should be kept very low to minimize ringing ...
Page 21
... CORNER REF. OPTION 4X BOTTOM VIEW SECTION "C-C" TERMINAL TIP FOR ODD TERMINAL/SIDE FOR EVEN TERMINAL/SIDE 21 ISL6253 L28.5x5 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHD-1 ISSUE SYMBOL 0. ...
Page 22
... 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 22 ISL6253 M28.15 28 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE M ...