NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 General Description Features The AUR9807 is a single-cell Li-ion charger IC with system power management feature. It charges the battery and power the system simultaneously. The maximum charging current (up to 1.5A) is set by external resistor for fast charging. The output voltage for the system is regulated to a nominal value (three different versions available: 4.4V, 5V or 6V); the actual value of the output voltage depends on the input voltage from the adapter, the charging current and the system loading. With the decrease of the input voltage or the increase of the system loading current, the output voltage drops. When the output voltage drops to a predetermined value (VAPM-REG), the Active Power Management function is activated and tries to maintain the output voltage at VAPM-REG; the AUR9807 will suffice the system loading with first priority and reduce the charging current temporarily, i.e. under heavy load condition, the AUR9807 charges the battery with the remaining available current to keep the output voltage at VAPM. In this manner, the charge and discharge cycle of the battery can be reduced. It is possible that the AUR9807 fails to maintain the output voltage at VAPM-REG; for example, when the system loading current exceeds the capability of the current-limiting AC adapter. In this scenario, the output voltage drops to the battery voltage, and the system is allowed to draw current from the battery. The AUR9807 is available in QFN-4.5x3.5-20 package. * * * * * * * * * * * QFN Package Active Power Management (APM) for Simultaneously Powering the System and Charging the Battery Total Current Supported Up to 2 Amperes (System Loading Having Higher Priority on the Budget) Automatic Power Source Selection (AC Adapter or Battery) 40m Power Path for the Battery to Supply the System Power Efficiently Junction Temperature Detection and Thermal Regulation During Charging Process External LED Indicating Charger and Power Good Status as Well as Fault Condition Thermal, Short-Circuit, and Reverse Current Protection Short-Circuit Protection in the Low Power Consumption Sleep Mode SYSOFF Function to Cut Off the Path Between the System and the Battery Built-in Over Voltage Protection up to 18V Applications * * * * Battery-Powered Devices or Equipment Mobile Phones, Digital Cameras and MP3 Players Radios, Other Hand-Held Games and Instruments Solar Power System QFN-4.5x3.5-20 Figure 1. Package Type of AUR9807 AUR9807 Document number: DS37580 Rev. 1 - 3 1 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Pin Configuration GND Pin 1 Mark VREF D Package (QFN-4.5x3.5-20) 1 20 STAT1 2 19 GND STAT2 3 18 /PG IN 4 17 OUT BAT 5 16 OUT BAT 6 15 OUT ISET2 7 14 TMR MODE 8 13 APM CE 9 12 TS 10 11 ISET1 SYSOFF Exposed Pad Figure 2. Pin Configuration of AUR9807 (Top View) AUR9807 Document number: DS37580 Rev. 1 - 3 2 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Pin Description Pin Number I/O Pin Name Function 1 O VREF Internal reference; VREF output capacitor not required, but one with a value of 0.1F is recommended. 2 O STAT1 Charge status flag 1 (open-drain) 3 O STAT2 Charge status flag 2 (open-drain) 4 I IN 5,6 I/O BAT 7 I ISET2 8 I MODE 9 I CE 10 I/O ISET1 11 I SYSOFF 12 I/O TS 13 I APM 14 I/O TMR 15 , 16 , 17 O OUT System output 18 O /PG Power-good status flag (open-drain) 19 , 20 I GND AUR9807 Document number: DS37580 Rev. 1 - 3 Chip input voltage Battery connection; charging or discharging all through this pin USB mode total current selection (High=450mA, Low= 90mA) and AC mode charge current selection (High=Full current, Low=half current) Set AUR9807 in AC(High) or USB(Low) mode Chip enable (active high) Set the maximum charging current Cut off the power path between the battery and the output pin Battery Temperature sensing Active Power Management set point no need for capacitors Timer program by external resistor connected to this pin. Tying TMR and VREF together to disable the safety timer Chip Ground 3 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Functional Block Diagram IN 4 1 3.3V Short-Circuit Recovery VREF 15, 16, 17 Q1 OUT VOUT UVLO Fault Recovery Power Source Selection VISENSE 100mA 500mA VSET BAT Short-Circuit Recovery ISENSE Q2 10 VI(ISET1) 5, 6 VBAT VOUT VOUT(REG) SYSOFF GND TMR APM ISET1 BAT 11 VBAT VBAT(REG) 19, 20 VI(ISET1) VSET 14 VSET VAPM Oscillator 13 TJ TJ(REG) VBAT VOUT IAMP 1V VHTF ITS TS 12 AC Charge Enable Thermal Shutdown 1V BAT Charge Enable VLTF 500mA/100mA Fast Precharge MODE CE Power Source Selection 8 9 VBAT VRCH Charge Control Timer and Display Logic 1C - 500mA 7 ISET2 C/S - 100mA 18 /PG Recharge 2 VBAT VLOWV VI(ISET1) VTERM Precharge Termation VBAT VIN 3 STAT1 STAT2 Sleep Figure 3. Functional Block Diagram of AUR9807 AUR9807 Document number: DS37580 Rev. 1 - 3 4 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Ordering Information AUR9807 Circuit Type D: QFN-4.5x3.5-20 Output Voltage VF: 4.4V, CV Mode DF: 4.4V, Done VI: 5V, CV Mode DI: 5V, Done VS: 6V, CV Mode DS: 6V, Done G: Green CV mode: After charge done, charger will stay in constant voltage mode until time out. Done: After charge done, charger will shut down until the battery voltage drops below the battery recharge threshold. Package QFN-4.5x3.5-20 Temperature Range -40 to 85C Output Voltage Part Number Marking ID Packing Type 4.4V, CV Mode AUR9807VFGD A9807VFG Tape & Reel 4.4V, Done AUR9807DFGD A9807DFG Tape & Reel 5V, CV Mode AUR9807VIGD A9807VIG Tape & Reel 5V, Done AUR9807DIGD A9807DIG Tape & Reel 6V, CV Mode AUR9807VSGD A9807VSG Tape & Reel 6V, Done AUR9807DSGD A9807DSG Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G" in the part number, are RoHS compliant and green. AUR9807 Document number: DS37580 Rev. 1 - 3 5 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Absolute Maximum Ratings (Note 1) Parameter Supply Input Voltage Input Voltage Symbol Value Unit VIN VBAT, VCE, VAPM, V/PG, VMODE, VOUT, VISET1, VISET2, VSTAT1, VSTAT2, VTS VREF -0.3 to 18 V -0.3 to 7 V -0.3 to VOUT+0.3 V VTMR -0.3 to VOUT+0.3 V IIN 3.5 A IOUT 4 A IBAT -4 to 1.5 A IREF 30 mA I/PG, ISTAT1, ISTAT2 15 mA JA 52 C/W TSTG -65 to 150 C TJ -40 to 150 C 300 C Input Current Output Current Output Source Current (In Regulation at 3.3V VREF) Output Sink Current Thermal Resistance (Junction to Ambient) Storage Temperature Junction Temperature Lead Temperature (Soldering, 10 Seconds) ESD (Human Body Model) VHBM 2000 V ESD (Machine Model) VMM 200 V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol AUR9807DSGD, AUR9807VSGD Supply Voltage AUR9807DFGD,AUR9807VFGD, AUR9807DIGD, AUR9807VIGD VIN Input Current IIN Operating Junction Temperature Range TOP AUR9807 Document number: DS37580 Rev. 1 - 3 6 of 23 www.diodes.com Min Max Unit 4.35 6.3 V 4.35 5.5 V 2 A 125 C -40 October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Electrical Characteristics TA=25oC, VIN is within the recommended range, unless otherwise specified. Parameter Symbol Test Condition Active Supply Current IIN(SPLY) Sleep Mode Current into BAT Pin IBAT(SLP) Input Pin Current IIN(STDBY) Standby BAT Pin Standby Current IBAT(STDBY) Charge BAT IBAT(TERM) Done Current, Q1,Q2 DROP-OUT VOLTAGE IN to OUT Dropout VDO(IN-OUT) Voltage BAT to OUT Dropout VDO(BAT-OUT) Voltage VOLTAGE REGULATION Regulation VOUT VOUT(REG) 9807VF 9807DF Regulation VOUT VOUT(REG) 9807VI 9807DI Regulation VOUT VOUT(REG) 9807VS 9807DS APM REGULATION Min Typ Max Unit VIN>4.35V VIN<VBAT, 2.6V<VBAT<VBAT(REG) No load at OUT pin VIN<6V, Total current flow into IN pin with CE pin low; no load Total current flow into BAT pin with input source present and CE pin low Current flows into BAT pin after the termination of the charging process 1.1 2 mA 2.5 5 A 200 A 45 65 A 1 5 A MODE=High , IIN=1A 300 475 mV VBAT> 4V , IBAT=1A 40 100 mV VIN>4.4V+VDO(IN-OUT) 4.4 4.5 V VIN>5V+VDO(IN-OUT) 4.9 5.1 V VIN>6V+VDO(IN-OUT) 6 6.3 V 3.8 V A APM Set Point VAPM-SET VAPM-SET<VOUT 2.6 APM Current Source IAPM-SET Input present 95 100 105 VAPM-REG=VAPM-SET x SF 1.139 1.15 1.162 VOUT< VBAT- 60mV APM Scale Factor SF BATTERY SUPPLEMENT MODE Run Battery Supplement Mode VBSUP1 VBAT>2V Escape Battery Supplement Mode VBSUP2 VBAT>2V Precharge to Fast-charge Transition Voltage VLOWV Voltage on BAT Precharge Current Range IPRECHG V VOUT> VBAT- 20mV V 3.1 V 150 mA CHARGING-PRECHARGE AUR9807 Document number: DS37580 Rev. 1 - 3 2.9 10 7 of 23 www.diodes.com 3 October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Electrical Characteristics (Continued) TA=25oC, VIN is within the recommended range, unless otherwise specified. Parameter Symbol Precharge Set Voltage VPRECHG Test Condition tFALL=100ns, De-glitch Time Between 10mV overdrive, Fast Charge and tDGLF VBAT decreasing below Precharge Transition threshold CHARGING-CURRENT REGULATION Fast Charge Current ICHG VBAT>VLOWV, Mode=High Range BAT to OUT Pull-up RPBAT VBAT<1V Battery Charge Current VSET Voltage on ISET1 Set Voltage(1) 100mA<ICHG<1.5A Charge Current Set KSET Factor 10mA<ICHG<100mA Min Typ Max Unit 225 250 275 mV 22.5 100 1000 ms 1500 mA 1000 2.4 2.5 2.6 V 375 425 450 300 450 600 USB MODE INPUT CURRENT LIMIT USB Input Current Range IUSB ISET2=High 400 ISET2=Low 80 500 90 100 mA CHARGING VOLTAGE REGULATION Battery-charge-voltage Battery Charge Voltage Regulation Accuracy 4.2 VBAT(REG) TA=25C CHARGE TERMINATION DETECTION VBAT>VRCH, Charge Done Detection ITERM ITERM=(KSET x VTERM)/ Current RSET VBAT>VRCH, Mode=High Charge Done Set Voltage, VTERM Measured on ISET1 VBAT>VRCH, Mode=Low TEMPERATURE SENSE COMPARATORS High Voltage, Low VLTF Temp fault at VTS>VLTF Temperature Threshold Low Voltage , High VHTF Temp fault at VTS<VHTF Temperature Threshold Current Source for ITS Temperature Sense BATTERY RECHARGE THRESHOLD Recharge Voltage Threshold V -0.5 0.5 % -1 1 % 10 150 mA 230 250 270 95 100 130 95 mV 2.5 V 0.5 V 100 105 A VBAT(RE VBAT(RE VBAT(RE VRCH V G) G) G) -0.125 -0.1 -0.075 (1) For half-charge rate, VSET is 1.25V. AUR9807 Document number: DS37580 Rev. 1 - 3 8 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Electrical Characteristics (Continued) TA=25oC, VIN is within the recommended range, unless otherwise specified. Parameter Symbol Test Condition Low-level Output Saturation Voltage VOL IOL=5mA, requiring an external pull-up resistor> 1k Input Leakage Current ILKG Min Typ Max Unit 0.25 V 5 A 4 6 ms 1.1 STAT1, STAT2, AND /PG 1 ISET2, CE CE Pin Hold-off Time tCE-HLDOF CE fall low only F Low-level Input Voltage VIL 0 High-level Input Voltage CE Pin Low-level Input Current CE Pin High-level Input Current ISET2 Pin Low-level Input Current ISET2 Pin High-level Input Current MODE VIH 1.5 IIL1 -1 Mode Pin Low-level Input Voltage Mode Pin High-level Input Voltage Mode Pin Low-level Input Current TIMERS IIH1 IIH2 VISET2=VIN VIH Falling HiLow; 280k10% applied when low Input RMODE sets external hysteresis IIL KTMR External Resistor Limits RTMR Precharge Timer tPRECHG Timer Fault Recovery Pull-up from OUT to BAT RFAULT Time Out Factor1 Extension KEXT1 Time Out Factor2 Extension Document number: DS37580 Rev. 1 - 3 A VISET2=0.4V Timer Set Factor AUR9807 1 IIL2 VIL KEXT2 V -20 40 0.975 1 VIL+ 0.01 1.025 V VIL+ 0.024 V A -1 tCHG=KTMR x RTMR 0.313 30 0.115 x tCHG 0.36 0.414 s/ k 0.125 x tCHG 100 0.135 x tCHG 1 The actual charge current less than 50% of maximum fast charge current The actual charge current less than 25% of maximum fast charge current 9 of 23 www.diodes.com s k 2 4 October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Electrical Characteristics (Continued) TA=25oC, VIN is within the recommended range, unless otherwise specified. Parameter Symbol Test Condition CHARGER SLEEP THRESHOLDS Sleep-mode Entry VSLPENT Threshold Sleep-mode Exit VSLPEXIT Threshold DE-GLITCH TIME De-glitch Time for Charge Done Detection, Temperature Fault, tDEG Recharge and Sleep Mode Detection START-UP CONTROL BOOT-UP Temperature Trip Max VBAT +0.195 18.75 tBOOT-UP TSHTDWN Typ VBAT +0.125 On the first application of input low SWITCHING POWER SOURCE TIMING When input applied. Switching Power Source tSW-BAT Measure from: [/PG: Lo from Input to Battery Hi to IIN>5 mA ] THERMAL SHUTDOWN REGULATION Boot-up Time Min 120 150 TJ (Q1 and Q3 only) 150 TJ (Q1 and Q3 only) 25 Unit mV ms 180 ms 50 s Thermal Hysteresis Temperature Regulation Limit UVLO TJ(REG) TJ (Q2) 110 Under-voltage Lockout VUVLO 2.45 2.5 2.65 V Input Power Detection Threshold VIN(DT) Decreasing VIN Input power detected when VIN>VBAT + VIN(DT) VBAT=3.6V VIN: 3.5V 4V 55 80 130 mV Hysteresis VREF OUTPUT Output Regulation Voltage Regulation Accuracy VREF Output Current IREF On Resistance RDS(ON) Output Capacitance AUR9807 Document number: DS37580 Rev. 1 - 3 Active only if ADP or USB is present -5 OUT to VREF COUT 10 of 23 www.diodes.com C 130 27 mV 3.3 V +5 % 20 mA 50 1 F October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Electrical Characteristics (Continued) TA=25oC, VIN is within the recommended range, unless otherwise specified. SHORT CIRCUIT PROTECTION Short-circuit Recovery Between BAT to OUT IN to OUT Short-circuit Protection Output Short-circuit Detection Threshold, Power-on Output Short-circuit Detection Threshold, Supplement mode (VBAT - VOUT)>VOUT(SC2) Indicates Short-circuit Deglitch Time, Supplement Mode Short Circuit Maximum Short-current for VBAT>VOUT IOSH1 Pull-up source from BAT to OUT for short-circuit recovery VOUT<VBAT-200mV 10 mA RSHAC VOUT<1V 500 VOUT(SC1) VIN>VUVLO and VIN>VBAT + VIN(DT) 0.9 1 1.1 V VOUT(SC2) VBAT>2.5V 160 200 240 mV tDGL(SC2) ISHORT(2) s 512 VBAT>2.5V 9 A (2) For short current>ISHORT , short-protection may not work due to avalanche breakdown phenomenon. Typical Performance Characteristics Figure 4. Output Voltage vs. Output Current AUR9807 Document number: DS37580 Rev. 1 - 3 Figure 5. Output Voltage vs. Charge Current 11 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Typical Performance Characteristics (Continued) VOUT 2V/div VIN 2V/div ICHG 0.5A/div Time 20ms/div Figure 6. Charge Current vs. Input Voltage Figure 7. Power On VIN 2V/div VOUT 2V/div VOUT 2V/div VIN 2V/div ICHG 1A/div ICHG 0.5A/div VMODE 2V/div VSYSOFF 2V/div Time 1ms/div Time 200s/div Figure 8. SYSOFF Floating AUR9807 Document number: DS37580 Rev. 1 - 3 Figure 9. MODE Pin Pull Low 12 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Typical Performance Characteristics (Continued) VIN 2V/div VOUT 2V/div ICHG 0.5A/div VIN 2V/div VOUT 2V/div ICHG 0.5A/div VISET2 2V/div VISET2 2V/div Time 40s/div Time 400s/div Figure 10. ISET2 Pin Pull High Figure 11. ISET2 Pin Pull Low VIN 2V/div VOUT 2V/div ICHG 0.5A/div VMODE 2V/div Time 40s/div Figure 12. MODE Pin Pull High AUR9807 Document number: DS37580 Rev. 1 - 3 13 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Power Flow AC Adapter (or USB) IN OUT Q1 VDC VDC - System Q2 40 m + OUTREF BAT AUR9807 The AUR9807 selects the power source automatically. In the absence of the input source (AC adapter or USB), the battery is chosen to power the system. Under this circumstance, the AUR9807 consumes less than 5 Ampere; the power path resistance from the battery to the system is only 40m (3); all these guarantee a high efficiency and elongate the battery discharge time. With this stringent sleep current budget (<5A), the AUR9807 is still able to detect an output short condition and cuts off the power path between the battery and the system under short condition. directly, current limiting phenomenon occurs through Adaptive Power Management in response to the output voltage drop. The resistor connected to ISET1 pin sets the maximum charging current. This maximum charging current can be halved by pulling down the ISET2 pin. In USB mode, the AUR9807 will limit the total current within 450mA (ISET2=High) or 90mA (ISET2=Low). The maximum charging current is still set by the resistor connected to ISET1 pin; however, because of this current limiting feature, the actual charging current is usually less than 450mA (or 90mA). With the input power present, the MODE pin sets the AUR9807 in adapter mode or USB mode. In adapter mode, the AUR9807 does not limit the total current (3) Q2 design value is 40m. Power Source Selection and Charge Current Setting MODE Pin Level AC Adapter Loading Power Source Charge Current Setting Yes USB ISET1, limitation depends on ISET2 setting No Battery N/A Yes AC Adapter ISET1, half charging rate by setting ISET2 to low No Battery N/A Low High AUR9807 Document number: DS37580 Rev. 1 - 3 14 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Charge Function Descriptions Charge Flow Charge current = ICHG Current VBAT = 4.2V Voltage VBAT=Recharge threshold VBAT=3V Charge Current = 0.1 x ICHG Charge Done Timer Timeout Time Precharge Constant Current Phase Constant Voltage Phase Maximum Charging Current Setting MODE=High ISET2=High MODE=High MODE=Low ISET2=Low I CHG I CHG VSET K SET , VSET, max 2.5 R SET VSET K SET , VSET, max 1.25 R SET VSET K SET ISET2=High/L I , VSET, max 2.5 CHG ow R SET AUR9807 Document number: DS37580 Rev. 1 - 3 15 of 23 www.diodes.com Charge Done Recharge Process Pre-charge and Charge Done Current Setting I PRECHG I CHG,max ; 10 I CHG,max ; AC M ode 10 I I PRECHG CHG,max 20 I CHG,max I TERM ; AC M ode 20 I I PRECHG CHG,max 10 I I TERM CHG,max ; USB M ode 25 I TERM October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Charge Function Descriptions (Continued) The maximum charging current, the pre-charge current and charge done current setting are given in the above table. The charging process begins with a pre-charge phase; when the battery voltage reaches the pre-charge threshold VLOWV, the charger enters the constant current mode. At this stage, the charger tries to charge the battery with the maximum charging current (a constant); however, the actual charging current may be lower due to Active Power Management activated by large system loading or insufficient input current capability. The thermal fold-back mechanism also reduces the actual charging current when the junction temperature is over 110C. The battery voltage rises gradually with the constant current entering the battery. When the battery voltage reaches VBAT(REG), the charger enters the constant voltage mode. At this stage, the charger keeps the battery voltage at VBAT(REG) with a decreasing charging current. When the charging current drops below the charge done current setting, nominally the charging process is complete (this can be observed from the external indicator). Depending on different versions, after the charge done status indicated, the charger will stop providing charging current completely or stay in constant voltage mode till time out. When the battery voltage drops below the recharge threshold, a new charge cycle begins. Example: With a RSET=1k, the maximum charging current is about 1A for ISET2=High and 0.5A for ISET2=Low. The pre-charge current IPRECHG is 100mA. The charge done current setting is 100mA for AC mode and 40mA for USB mode. Note the absolute values of pre-charge current and charge done current setting do not vary with ISET2. Power Source Selecting AC Adapter IN OUT Q1 VDC - System Q2 40 m + OUTREF BAT AUR9807 i. ii. iii. iv. VIN<VBAT : VOUT=VBAT-VDO(BAT-OUT) VBAT<VIN<VOUT(REG) : VOUT=VIN-VDO(IN-OUT) VOUT(REG) +VDO(IN-OUT)<VIN<6V: VOUT=VOUT(REG) 6V<VIN: VOUT =VBAT-VDO(BAT-OUT) The AUR9807 selects power source automatically depending on the voltage present at the input. When VIN is lower than VBAT, the battery is responsible to power the system. The output voltage VOUT is VBAT - VDO(BAT-OUT). When the input voltage VIN is higher than VBAT and lower than 6V, the input source is used to supply the system power; the output voltage depends on VIN. When VIN is lower than VOUT(REG), AUR9807 Document number: DS37580 Rev. 1 - 3 the output voltage VOUT is VIN-VDO(IN-OUT); when VIN is high enough, which means that V IN>(VOUT(REG)+ VDO(IN-OUT)), the output voltage is regulated at VOUT(REG). When the input voltage VIN is higher than 6V, the current path between IN and OUT is cut off to protect the chip; AUR9807 therefore selects the Battery as the power source; the output voltage VOUT is then VBAT-VDO(BAT-OUT). 16 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Charge Function Descriptions (Continued) Active Power Management (APM) When the output voltage is higher than VAPM-REG, the input source is capable of providing the charging current (set by RSET) and output current (determined by system loading) simultaneously. When the output voltage goes down and reaches VAPM-REG due to an increasing loading, AUR9807 starts to reduce the charging current and tries to keep the output voltage at VAPM-REG. Because AUR9807 uses the remaining available current to charge the battery, the charging current can be estimated as Isupply max - IOUT. In AC mode, the Isupply max is determined by the driving capability of the AC adapter and AUR9807 itself (usually the limiting factor is the AUR9807, and Isupply max is about 2A). The Isupply max is determined by the ISET2 setting in USB mode (Isupply max is about 450mA with ISET2 high, and Isupply max is about 90mA with ISET2 low). AC MODE (MODE=HIGH) i. VAPM-REG<VOUT : Normal Mode; ICHG determined by RSET ii. VBAT<VOUT<VAPM-REG : APM mode ; ICHG= Isupply -I max OUT iii. VOUT<VBAT : BAT supply mode USB 500 MODE (MODE=LOW , ISET2=HIGH) i. VAPM-REG<VOUT: Normal Mode; ICHG determined by RSET ii. VBAT<VOUT<VAPM-REG : APM mode; ICHG = 450mA - IOUT iii. VOUT<VBAT: BAT supply mode USB 100 MODE (MODE=LOW , ISET2=LOW) i. VAPM-REG<VOUT : Normal Mode; ICHG determined by RSET ii. VBAT<VOUT<VAPM-REG : APM mode; ICHG= 90mA-IOUT iii. VOUT<VBAT : BAT supply mode When the loading current keeps increasing and exceeds Isupply max, the AUR9807 can not prevent the output voltage dropping below VAPM-REG even the charging current is reduced to zero. When the output voltage drops below the battery voltage, the battery helps to supply the loading current and keeps the output voltage roughly at VBAT. At this situation, we have: The active power management feature adjusts the charging current to resist the output voltage drop due to heavy system loading or insufficient input driving capability. In the extreme situation, the charging current flow would be reversed (the battery helps to supply the system power). The active power management regulation voltage VAPM-REG is given by: VAPM-REG = IAPM-SETxRAPM xSF(4) IOUT = Isupply max+IBAT(5) (4) (5) RAPM<38k: VAPM-REG=IAPM-SETxRAPMxSF RAPM>41k: The VAPM-REG is set to predetermined fixed value (4.26V) IBAT=(VBAT-VOUT) / (40m Power Path Resistance) a Battery Temperature Protection AUR9807 BAT Li Battery 1F 100A LOGIC UNIT VHTF NTC TS VLTF AUR9807 Document number: DS37580 Rev. 1 - 3 17 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Charge Function Descriptions (Continued) The AUR9807 interrupts the charging process when the battery temperature is out of normal range. It provides a 100A sensing current to the negative-temperature coefficient resistor (on the battery side) through the TS pin. The battery protection is achieved by constantly monitoring the voltage at the TS pin. When this voltage is higher than VLTF (nominally 2.5V) or lower than VHTF (nominally 0.5V), an under-temperature or over-temperature condition is detected. For an usual 103AT-type NTC resistor, the corresponding temperature range is between 0C and 45C. The normal battery temperature range can be modified by adjusting the NTC resistor or by adding extra resistor network between the TS pin and the negative-temperature coefficient resistor. The charging process would resume after the battery temperature goes back within the normal range. Charge Timeout Setting The charge timeout setting is programmed by the resistor RTMR connected between the TMR and ground pin. The timeout setting is given by: Once the abnormal condition is removed (high temperature or heavy loading), the charging current resumes the maximum values (set by RSET), and the time out counter will operate in normal rate. Charge Status Indicator Status Pre-charge Constant current and constant voltage charge Charge done Fault condition (time out, sleep mode, or OTP) STAT1 ON STAT2 ON ON OFF OFF ON OFF OFF The open drain pins STAT1 and STAT2 provides the information about the charger status when the CE pin (chip enable) is set to high. The various charger status and the corresponding STAT1 and STAT2 levels are given in the above Table. Connect these pins to the host processor or LEDS to indicate the charger status. Short Circuit Protection tCHG = KTMR xRTMR A suggested 36k RTMR gives a 3.6 hrs timeout setting because the nominal value of KTMR is 0.36 sec/. In the actual charging process, the charging duration is elongated if the charging current can not reach the maximum current setting (again this relates to system loading and environment temperature); therefore, it is possible that the charging process is still on progress while the 3.6 hrs timeout limit has been reached. To circumvent this problem, the actual charging current is monitored and the clock rate of the timer counter is halved if the charging current is less than 50% of the maximum fast charging current. This is equivalent to modify the timeout setting temporarily by the following equation: tCHG = KEXT1 x KTMR xRTMR, where KEXT1=2 If the actual charging current is less than one fourth the maximum fast charging current, the time out counter rate is reduced to 25%. The temporary timeout setting is given by: AUR9807 provides short circuit protection for both the input and the battery. When VIN is larger than VBAT, AC adapter (or USB port) is chosen as the power source. If the output voltage is lower than 1V (VOUT(SC1)) for more than tDGL(SC), a short circuit condition is detected; the power path between the input and the output will be cut off. The charging process will be interrupted. A 500 resistor is used to pull up the output voltage; if the load at the output is removed, the output voltage can be pulled up and the short circuit condition is dissolved. Similarly, when the battery is chosen as the power source, an output voltage lower than the battery voltage by 200mV (VOUT(SC2)) longer than tDGL(SC) will trigger the short circuit protection mechanism (this corresponds to a 5A loading current). A 10mA current source is used to pull up the output and detect the removal of the short condition. The power consumption is less than 5A under the battery supply mode; however, AUR9807 is still able to monitor the output voltage and detect a short circuit condition with this limiting current budget. SYSOFF Function tCHG = KEXT2 x KTMR xRTMR, where KEXT2=4 AUR9807 Document number: DS37580 Rev. 1 - 3 The SYSOFF function is used to cut off the power path between the battery and the output. This means the 18 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Charge Function Descriptions (Continued) charger function can be disabled by pulling up the SYSOFF pin; in this mode, the AUR9807 is almost a regulator to power the system. Because the power path is cut off, the output voltage will drop to zero when the input source is removed, the battery will not be used to power the system. The SYSOFF pin is pulled high internally; therefore, this pin should be pulled to ground for normal operation. Recharge Process Elimination and Timer Fault If timeout occurs and the battery voltage is higher than the recharge threshold, the charger will stay in the charge done mode until the battery voltage drops below the recharge threshold. Once the battery voltage drops below the recharge threshold, a new AUR9807 Document number: DS37580 Rev. 1 - 3 charge cycle starts. If timeout occurs and the battery voltage is lower than the recharge threshold, the charger will indicate a fault condition and an internal resistor between output and battery will try to pull up the battery voltage. If the internal resistor is unable to pull up the battery voltage to the recharge threshold, the charger will stay in fault condition. Once the battery voltage is higher than the recharge threshold, the charger removes the pull-up resistor, leaves the fault condition and stay in the charge done mode temporarily. The charger then waits the battery voltage to drop below the recharge threshold and starts a new charge cycle. 19 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 PC Board Layout Considerations It is important to pay special attention to the PCB layout. The following provides some guidelines. 1. To obtain optimal performance, the decoupling capacitor from the input terminal to GND and the output filter capacitor from OUT to GND should be placed as close as possible to the AUR9807, with short trace runs to both signal and GND pins. 2. All low-current GND connections should be kept separate from the high-current charge or discharge paths from the battery. Use a single-point ground technique incorporating both the small signal ground path and the power ground path. 3. The high-current charge paths into IN and from the BAT and OUT pins must be sized appropriately for the maximum charge current in order to avoid voltage drops in these traces. STAT1 VOUT VOUT +5V JP5 3 2 1 R1 1k H LED1 - Green STAT2 H R2 1k LED2 - Red /PG R16 1k D1 5.1V ZENER R3 1k LED3 - Green VOUT C1 0.1F C4 10F/16V VIN C5 /opt U1 VIN C6 /opt 1 2 3 4 5 6 7 8 9 10 C2 10F/35V VBAT C7 /opt C3 1F VREF STAT1 STAT2 IN BAT BAT ISET2 MODE CE ISET1 GND GND /PG OUT OUT OUT TMR APM TS SYSOFF R13 /opt 20 19 18 17 16 15 14 13 12 11 TP4 TP3 JP1 TS R6 100k L ISET2 H L MODE H 3 2 1 JP2 R12 20k R10 10k TP2 ISET1 3 2 1 R11 27k APM TP1 R5 100k R15 50k TMR AUR9807 R4 100k R14 30k R8 1k R9 10k R7 100k 3 2 1 JP3 L CE H L SYS_OFF H 3 2 1 JP4 H Figure 13. The Evaluation Board Schematic AUR9807 Document number: DS37580 Rev. 1 - 3 20 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 PC Board Layout Considerations (Continued) Figure 14. Top Side View of The Evaluation Board Figure 15. Bottom Side View of The Evaluation Board AUR9807 Document number: DS37580 Rev. 1 - 3 21 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 20 VREF 1 Typical Application GND Adapter or USB 10F 2 STAT1 GND 19 3 STAT2 /PG 18 4 IN OUT 17 5 BAT OUT 16 6 BAT OUT 15 7 ISET2 TMR 14 BATTERY SYSTEM 10F 1F RTMR 8 MODE 9 CE APM 13 TS 12 RAPM NTC 11 ISET1 10 RSET SYSOFF Control Signals and Status Indicators Figure 16. Typical Application of AUR9807 AUR9807 Document number: DS37580 Rev. 1 - 3 22 of 23 www.diodes.com October 2014 (c) Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN Data Sheet Single-cell Li-Ion Charger IC with System Power Management AUR9807 Mechanical Dimensions QFN-4.5x3.5-20 Pin 1 Mark Unit: mm(inch) 0.300(0.012) 0.500(0.020) 1.500(0.059) BSC N20 N1 N19 4.500(0.177) BSC N2 2.950(0.116) 3.100(0.122) N12 N9 N11 3.500(0.138) BSC N10 1.950(0.077) 2.100(0.083) 0.700(0.027) 0.800(0.031) 0.180(0.007) 0.300(0.012) 0.500(0.020) BSC 0.200(0.008) REF 0.000(0.000) 0.050(0.002) AUR9807 Document number: DS37580 Rev. 1 - 3 23 of 23 www.diodes.com October 2014 (c) Diodes Incorporated BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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