Renesas ISL9241 Application Note Download Page 17

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(Rev.1.0  Mar 2020)

Summary of Contents for ISL9241

Page 1: ...2 Bypass Mode with Battery Charging 3 1 3 Reverse Turbo Boost RTB Mode with Battery Charging 4 1 4 Battery Only Mode 5 1 5 Supplemental Mode Intel VAP 6 2 Transitioning Between Modes NVDC Bypass RTB...

Page 2: ...urbo Boost RTB Mode with Battery Charging Battery Only mode see Battery Only Mode Supplemental mode Intel Vmin Active Protection VAP see Supplemental Mode Intel VAP 1 1 Narrow Voltage Direct Charging...

Page 3: ...be operated in Bypass mode In Bypass mode the adapter is connected directly to the system and the system power is provided directly from the adapter The charging and discharging power goes through the...

Page 4: ...provided from the adapter As the system load increases the ISL9241 provides power from the adapter up to the programmed Adapter Current Limit When the Adapter Current Limit is reached the ISL9241 ope...

Page 5: ...urned off and the ISL9241 can operate in a low power state consuming very little current for operation When the ISL9241 is operating in Battery Only mode you can connect a battery powered device to th...

Page 6: ...energy from the battery in the input capacitors on the adapter side at high voltage If the system voltage starts falling below a threshold during a high system load event due to high battery impedance...

Page 7: ...it 0 CC 0 MinSysV 0 Bypass Charging State The adapter is connected directly to the system Bypass and charging is enabled but the turbo boost function is disabled Use this state when the adapter can su...

Page 8: ...ster to 0 to disable trickle charging MinSysVoltage 0 Write 0x3E A NVDC to Bypass Preparation Set adapter current limit to appropriate value ACLIM Adapter specific Write 0x3F Preparation Reduce system...

Page 9: ...urning off the battery FET the ISL9241 output is ramped up to the adapter voltage The NGATE FET is closed connecting the output of the ISL9241 to the system The Bypass FETs then open isolating the ada...

Page 10: ...s Transition From State To State Step Number Function Description Register Name Value Decimal Register Address C Bypass RTB Reverse Turbo Boost 1 Reduce system load below ACLIM 2 Enable Reverse Turbo...

Page 11: ...ecific 0x15 H Bypass CHRG RTB CHRG 1 Reduce system load below ACLIM 2 Enable Reverse Turbo Boost function Control 0 0 1 0x39 I RTB CHRG Bypass CHRG 1 Reduce system load below ACLIM 2 Disable reverse t...

Page 12: ...adapter 1 Disable Force Forward Buck Reverse Boost bit Control 4 0 0x4E 2 Turn off BYPSG Turn on NGATE Disable Charge pump 100 and disable VIN VOUT comparator Control 0 0 0x39 3 Set MaxSysVoltage regi...

Page 13: ...cting another adapter 1 Disable Force Forward Buck Reverse Boost bit Control 4 0 0x4E 2 Set Charge Current to 0 to disable fast charging ChargeCurrentLimit 0 0x14 3 Set MinSysVoltage to 0 to disable t...

Page 14: ...ote the MaxSystemVoltage register is limited to a maximum output of 18 304V 2 5 2 Calculating Wait Time to Allow CSOP to Discharge to VBAT A 10mA discharge current is applied on the CSOP pin This impl...

Page 15: ...limit the slew on the input capacitor by limiting the battery discharge current The amount of battery discharge current allowed varies with battery voltage For example under the following hypothetica...

Page 16: ...NVDC CHRG to Bypass section Updated Tables 1 and 2 2 00 Jan 10 2019 Changed the order of steps in the NVDC Mode to Bypass Mode steps Added steps to the Adapter unplug removal events to set BGATE to no...

Page 17: ...TY RIGHTS These resources are intended for developers skilled in the art designing with Renesas products You are solely responsible for 1 selecting the appropriate products for your application 2 desi...

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