ISL6251A Intersil Corporation, ISL6251A Datasheet
ISL6251A
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ISL6251A Summary of contents
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... Ld 5x5 QFN L28.5×5 ISL6251HAZ ISL6251HAZ -10 to 100 24 Ld QSOP ISL6251AHRZ ISL6251AHRZ -10 to 100 28 Ld 5x5 QFN L28.5×5 ISL6251AHAZ ISL6251AHAZ -10 to 100 24 Ld QSOP NOTES: 1. Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...
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... VREF 6 CHLIM ISL6251, ISL6251A 23 22 CSOP 21 CSIN 20 CSIP PHASE 16 UGATE ISL6251, ISL6251A (24 LD QSOP) TOP VIEW VDD DCIN 1 24 ACSET ACPRN CSON CELLS 4 21 CSOP ICOMP 5 20 CSIN VCOMP CSIP 6 19 ICM PHASE ...
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... TRIP POINTS ACSET Threshold ACSET Input Bias Current Hysteresis ACSET Input Bias Current ACSET Input Bias Current 3 ISL6251, ISL6251A Thermal Information Thermal Resistance QFN Package (Notes 4, 6 QSOP Package (Note Junction Temperature Range .-10°C to +150°C Operating Temperature Range . . . . . . . . . . . . . . . .-10°C to +100°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65° ...
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... Guaranteed by design 0 < CSOP < 18V 0 < CSON < 18V ISL6251: CHLIM = 3.3V ISL6251A, CHLIM = 3.3V ISL6251: CHLIM = 2.0V ISL6251A: CHLIM = 2.0V ISL6251: CHLIM = 0.2V ISL6251A: CHLIM = 0.2V CHLIM = GND or 3.3V, DCIN = 0V CHLIM rising Guaranteed by design CSIP = CSIN = 25V 0 < CSIN < DCIN, Guaranteed by design = 1µ 0mA -10°C to +100°C, ...
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... Thermal Shutdown Temperature Hysteresis NOTE: 7. This is the sum of currents in these pins (CSIP, CSIN, BOOT, UGATE, PHASE, CSOP, CSON) all tied to 16.8V. No current in pins EN, ACSET, VADJ, CELLS, ACLIM, CHLIM. 5 ISL6251, ISL6251A TEST CONDITIONS ACLIM = VREF ACLIM = Float ACLIM = GND ACLIM = VREF ACLIM = GND ...
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... CSIP-CSIN (mV) FIGURE 3. ICM ACCURACY vs AC ADAPTER CURRENT LOAD STEP: 0-4A CHARGE CURRENT ADAPTER CURRENT LIMIT: 5.15A FIGURE 5. LOAD TRANSIENT RESPONSE 6 ISL6251, ISL6251A DCIN = 20V, 4S2P Li-Battery, T VDD=5.075V VDD=5.075V EN=0 EN 100 FIGURE 4. SYSTEM EFFICIENCY vs CHARGE CURRENT ...
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... Typical Operating Performance BATTERY BATTERY INSERTION INSERTION VCOMP VCOMP ICOMP ICOMP FIGURE 7. BATTERY INSERTION AND REMOVAL FIGURE 9. SWITCHING WAVEFORMS IN CC MODE 7 ISL6251, ISL6251A DCIN = 20V, 4S2P Li-Battery, T INDUCTOR INDUCTOR CURRENT CURRENT 2A/div 2A/div BATTERY BATTERY REMOVAL REMOVAL CSON CSON 10V/div 10V/div ...
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... ICM ICM is the adapter current output. The output of this pin produces a voltage proportional to the adapter current. 8 ISL6251, ISL6251A 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 IC analog circuit. Connect a 1μ ...
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... ISL6251, ISL6251A ICM ICM ACSET ACSET ACPRN ACPRN + + - - 1.26V 1.26V VREF VREF VREF VREF + + + - - - 152K 152K 152K 152K Adapter Adapter 1.27V 1.27V Current Current ACLIM ACLIM Limit Set Limit Set Adapter Adapter 152K 152K 152K 152K Current Limit Set Current Limit Set ...
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... Trickle Charge CHLIM CHLIM R13 R11 1.87k 130k ACLIM ACLIM 1% 1% Trickle Charge VREF VREF Q3 FIGURE 12. ISL6251, ISL6251A TYPICAL APPLICATION CIRCUIT WITH FIXED CHARGING PARAMETERS 10 ISL6251, ISL6251A D4 C8 0.1µF CSIP CSIP C2 R2 ISL6251 0.1µF ISL6251 20mΩ ISL6251A ISL6251A ...
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... INPUT CURRENT LIMIT C6 HOST 6.8nF R6 C5 10k 10nF AVDD/VREF R11, R12, R13 10k FLOATING 4.2V/CELL SCL SDL A/D INPUT GND FIGURE 13. ISL6251, ISL6251A TYPICAL APPLICATION CIRCUIT WITH MICRO-CONTROLLER 11 ISL6251, ISL6251A 0.1µF DCIN DCIN CSIP CSIP ACSET ACSET C2 0.1µF VDDP VDDP CSIN ...
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... A high efficiency synchronous buck converter is used to control the charging voltage and charging current up to 10A. The ISL6251, ISL6251A has input current limiting and analog inputs for setting the charge current and charge voltage; CHLIM inputs are used to control charge current and VADJ inputs are used to control charge voltage ...
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... By using the input current limiter, the current capability of the AC adapter can be lowered, reducing system cost. CELL NUMBER The ISL6251, ISL6251A limits the battery charge current 4 when the input current-limit threshold is exceeded, ensuring 3 the battery charger does not load down the AC adapter 2 voltage ...
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... VDD through an external resistor. Bypass VDDP and VDD with a 1µF capacitor. Shutdown The ISL6251, ISL6251A features a low-power shutdown mode. Driving EN low shuts down the charger. In shutdown, the DC/DC converter is disabled, and VCOMP and ICOMP are pulled to ground. The ICM, ACPRN outputs continue to function ...
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... The maximum efficiency is achieved by selecting a high side MOSFET that has the conduction losses equal to the switching losses. Ensure that ISL6251, ISL6251A LGATE gate driver can supply sufficient gate current to prevent it from conduction, which is due to the injected current into the drain-to-source parasitic ...
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... GATE into the above equation yields that the total gate charge should be less than 80nC. Therefore, the ISL6251, ISL6251A easily drives the battery charge current up to 10A. Input Capacitor Selection The input capacitor absorbs the ripple current from the synchronous buck converter, which is given by: ...
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... where R is the trans-resistance in current loop usually equal to the product of the charging current sensing resistance and the gain of the current sense amplifier, CA2. For ISL6251, ISL6251A 20R . T 1 The voltage gain with open current loop is ...
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... The negative side of the output capacitor must be close to the source node of the bottom MOSFET. This trace is the return path of LGATE. 18 ISL6251, ISL6251A PHASE Pin This trace should be short, and positioned away from other weak signal traces. This node has a very high dv/dt with a voltage swing from the input voltage to ground ...
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... CORNER REF. OPTION 4X BOTTOM VIEW SECTION "C-C" TERMINAL TIP FOR ODD TERMINAL/SIDE FOR EVEN TERMINAL/SIDE 19 ISL6251, ISL6251A L28.5x5 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHD-1 ISSUE SYMBOL 0.10 C 0.08 C ...
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... 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 20 ISL6251, ISL6251A M24.15 24 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE M ...