ISL88731AHRZ-T Intersil, ISL88731AHRZ-T Datasheet
ISL88731AHRZ-T
Specifications of ISL88731AHRZ-T
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ISL88731AHRZ-T Summary of contents
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... Notebook Computers • Tablet PCs • Portable Equipment with Rechargeable Batteries Ordering Information PART NUMBER 22 (Notes VDDP ISL88731AHRZ ISL887 31AHRZ -10 to +100 28 Ld 5x5 LGATE 20 NOTES: PGND 19 1. Add “-T*” suffix for tape and reel. Please refer to CSOP 18 on reel specifications. ...
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DACV VDDSMB 6 DACS SMBUS SDA 6 DACI SCL EN CSSP LEVEL SHIFTER DACS CSSN 20x ICOMP CSOP LEVEL SHIFTER CSON DACI 20x VFB 500k 100k EN VCOMP FIGURE 1. FUNCTIONAL BLOCK DIAGRAM AC ADAPTER AGND FIGURE 2. TYPICAL ...
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... QFN Package Junction Temperature Range .-55°C to +150°C Operating Temperature Range . . . . . . . . . . . . . . . .-10°C to +100°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = -10°C to +100°C. Boldface limits apply over the operating temperature A CONDITIONS ChargeVoltage = 0x3130 ChargeVoltage = 0x20D0 ...
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Electrical Specifications DCIN = CSSP = CSSN = 18V, CSOP = CSON = 12V, VDDP = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V, CVDDP = 1µF, IVDDP = 0mA, T range, -10°C to +100°C. (Continued) PARAMETER Battery Quiescent ...
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Electrical Specifications DCIN = CSSP = CSSN = 18V, CSOP = CSON = 12V, VDDP = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V, CVDDP = 1µF, IVDDP = 0mA, T range, -10°C to +100°C. (Continued) PARAMETER SWITCHING REGULATOR ...
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Typical Operating Performance 5.15 5.10 5.05 5.00 4.95 4.90 4. VDDP LOAD CURRENT (mA) FIGURE 3. VDD LOAD REGULATION -10 - ADAPTER CURRENT (A) FIGURE 5. ...
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Typical Operating Performance UGATE PHASE FIGURE 9. SWITCHING WAVEFORMS AT DIODE EMULATION FIGURE 11. BATTERY REMOVAL ADAPTER CURRENT FIGURE 13. LOAD TRANSIENT RESPONSE 7 ISL88731A DCIN = 20V, 3S2P Li-Battery +25°C, unless otherwise noted. (Continued) A LGATE INDUCTOR ...
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Functional Pin Descriptions BOOT High-Side Power MOSFET Driver Power-Supply Connection. Connect a 0.1µF capacitor from BOOT to PHASE. UGATE High-Side Power MOSFET Driver Output. Connect to the high-side N-Channel MOSFET gate. LGATE Low-Side Power MOSFET Driver Output. Connect to low-side ...
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Theory of Operation Introduction The ISL88731A includes all of the functions necessary to charge 1-to-4 cell Li-ion and Li-polymer batteries. A high efficiency synchronous buck converter is used to control the charging voltage up to 19.2V and charging current up ...
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Short Circuit Protection and 0V Battery Charging Since the battery charger will regulate the charge current to the limit set by the ChargeCurrent register, it automatically has short circuit protection and is able to provide the charge current to wake ...
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The System Management Bus The System Management Bus (SMBus 2-wire bus that supports bidirectional communications. The protocol is described briefly here. More detail is available from www.smbus.org. General SMBus Architecture VDDSMB SMBUS MASTER INPUT SCL CONTROL OUTPUT CPU ...
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... Table 1. ManufacturerID and DeviceID are “read only” registers and can be used to identify the ISL88731A. On the ISL88731A, ManufacturerID always returns 0x0049 (ASCII code for “I” for Intersil) and DeviceID always returns 0x0001. Enabling and Disabling Charging After applying power to ISL88731A, the internal registers contain their POR values (see Table 1) ...
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Setting Charge Voltage Charge voltage is set by writing a valid 16-bit number to the ChargeVoltage register. This 16-bit number translates to a 65.535V full-scale voltage. The ISL88731A ignores the first 4 LSBs and uses the next 11 bits to ...
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Setting Charge Current ISL88731A has a 16-bit ChargeCurrent register that sets the battery charging current. ISL88731A controls the charge current by controlling the CSOP-CSON voltage. The register’s LSB translates to 10µV at CSON-CSOP. With a 10mΩ charge current R resistor ...
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Setting Input-Current Limit The total power from an AC-adapter is the sum of the power supplied to the system and the power into the charger and battery. When the input current exceeds the set input current limit, the ISL88731A decreases ...
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Charger Timeout The ISL88731A includes 2 timers to insure the SMBus master is active and to prevent overcharging the battery. ISL88731A will terminate charging if the charger has not received a write to the ChargeVoltage or ChargeCurrent register within 175s ...
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F 10% of the switching frequency. The highest F voltage control mode with the battery removed and may be calculated (approximately) from Equation 5: ⋅ ⋅ SENSE F ------------------------------------------ - = ...
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Low switching loss requires low drain-to-gate charge Q Generally, the lower the drain-to-gate charge, the higher the ON-resistance. Therefore, there is a trade-off between the ON-resistance and drain-to-gate charge. Good MOSFET selection is based on the Figure of Merit (FOM), ...
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VDD RAMP GEN V = VDD/11 RAMP - + PWM INPUT PWM GAIN= FET_RDSON L_DCR PWM INPUT FIGURE 20. SMALL SIGNAL AC MODEL In most cases the Battery resistance is very small (<200mΩ) resulting in a ...
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F ZERO 20 0 -20 F POLE1 -40 -60 0.01 0.1 1 FREQUENCY (kHz) FIGURE 22. CHARGE CURRENT LOOP BODE PLOTS DCIN PHASE FET_RDSON CA2 + Σ 0.25 ...
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C which give the loop very high DC gain, a very low VCOMP frequency pole and a zero at F ZERO1 information is added to the feedback to create a second zero F . The low pass filter R , ...
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... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. 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 ...
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Package Outline Drawing L28.5x5B 28 LEAD THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 1, 10/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 65 TYP ) ( 3. 25) TYPICAL RECOMMENDED LAND PATTERN 23 ISL88731A A ...