EUP8020X Dual Source AC/USB Li-Ion/Polymer Charger IC for Portable Applications DESCRIPTION FEATURES The EUP8020X series are highly integrated single cell Li-Ion/Polymer battery charger IC designed for handheld devices. The EUP8020X accepts two power inputs, normally one from a USB port and another one from AC-adaptor. The EUP8020X automatically selects the USB-Port or the AC-adapter as the power source for the system. In the USB configuration, the host can select from the two preset charge rates of 100 mA and 500 mA. In the AC−adapter configuration an external resistor sets the magnitude of the charge current, which may be programmed up to 1A. The EUP8020X charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination. The EUP8020X automatically re-starts the charge if the battery voltage falls below an internal threshold. The EUP8020X also automatically enters sleep mode when both supplies are removed. No external sense resistor or blocking diode is required for charging. The EUP8020X integrates internal power FET , current sensor, charge status and reverse current protection in a single monolithic devices. z z z z z z z z z Charges Single Cell Li-Ion/Polymer from Either AC Adapter or USB With Autonomous Power-Source Selection Integrated Power FET and Current Sensor for Up to 1A Charge Applications From AC Adapter Integrated USB Control With Selectable 100 mA and 500 mA Charge Rates Precharge Conditioning With Safety Timer Power Good (AC Adapter Present) Status Output Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-Power Consumption Available in TDFN-10 Package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS z z z z Smartphones Digital Cameras PDAs/ MP3 Players Other Battery-Powered Devices Typical Application Circuit Figure 1. EUP8020A DS8020X Ver 1.1 June 2006 1 EUP8020X Block Diagram Figure 2. DS8020X Ver 1.1 June 2006 2 EUP8020X Pin Configurations Package Type Pin Configurations Package Type EUP8020A/E TDFN-10 EUP8020B TDFN-10 EUP8020C TDFN-10 EUP8020D TDFN-10 EUP8020F TDFN-10 EUP8020G TDFN-10 Pin Configurations Pin Description PIN A,E B C D F G I/O AC 1 1 1 1 1 1 I AC charge input voltage USB 2 2 2 2 2 2 I USB charge input voltage STAT1 3 3 3 3 3 7 O Charge status output 1 (open-drain) STAT2 4 4 4 4 4 6 O Charge status output 2 (open-drain) VSS 5 5 5 5 5 3 - ISET1 6 6 6 6 6 8 I ISET2 7 7 7 7 7 4 I CE 8 9 8 - - 5 I Ground input Charge current set point for AC input and precharge and taper set point for both AC and USB Charge current set point for USB port (high=500 mA, Low=100 mA, hi-z=disable USB charge) Charge enable input (active low) TS 9 - - 9 9 9 I Temperature sense input OUT 10 10 10 10 10 10 O Charge current output PG - 8 - - - - O Powergood status output (active low) TE - - - - 8 - I Timer enable input (active low) TTE - - 9 8 - - I Timer and termination enable input (active low) DS8020X Ver 1.1 June 2006 DESCRIPTION 3 EUP8020X Ordering Information Order Number Package Type EUP8020A-JIR1 TDFN-10 EUP8020B-JIR1 TDFN-10 EUP8020C-JIR1 TDFN-10 EUP8020D-JIR1 TDFN-10 EUP8020E-JIR1 TDFN-10 EUP8020F-JIR1 TDFN-10 EUP8020G-JIR1 TDFN-10 Marking xxxxx 8020A xxxxx 8020B xxxxx 8020C xxxxx 8020D xxxxx 8020E xxxxx 8020F xxxxx 8020G EUP8020X- □ □ □ □ Lead Free Code 1: Lead Free 0: Lead Packing R: Tape& Reel Operating temperature range I: Industry Standard Package Type J: TDFN-10 DS8020X Ver 1.1 June 2006 4 Operating Temperature range -20 °C to 70°C -20 °C to 70°C -20 °C to 70°C -20 °C to 70°C -20 °C to 70°C -20 °C to 70°C -20 °C to 70°C EUP8020X Absolute Maximum Ratings Input voltage(AC, CE ,ISET1,ISET2,OUT, PG ,STAT1,STAT2, TE , TS, TTE ,USB) -------- 0.3V to 6V Output sink / source current (STAT1,STAT2, PG ) ---------------------------------------------------- 15mA Output current (TS ) --------------------------------------------------------------------------------------- 200μA Output current (OUT) ------------------------------------------------------------------------------------- 1.5 A Junction temperature range, TJ ------------------------------------------------------------------------- 150°C Storage temperature range, Tstg ------------------------------------------------------------- -65°C to 150°C Lead temperature (soldering, 10s) -------------------------------------------------------------------260°C Dissipation Ratings Package θJA TDFN-10 48°C/W Derating Factor Above TA =25°C 0.0208 W/°C TA < 40°C Power Rating 1.5W Recommended Operating Conditions (1) Min. Max. Unit Supply voltage (from AC input), VCC 4.5 5.5 V Supply voltage (from USB input), VCC 4.35 5.5 V Operating junction temperature range, TJ -40 125 °C Electrical Characteristics over Recommended Operating Free-Air Temperature Range Parameter Conditions EUP8020X Unit Min. Typ. Max. Input Current VCC current, ICC(VCC) Sleep current, ICC(SLP) Standby current, ICC(STBY) VCC > VCC(min) Sum of currents into OUT pin, VCC < V(SLP) CE = High, 0°C ≤ TJ ≤ 85°C 0.9 1.5 1 5 50 150 mA µA Voltage Regulation Output voltage, VO(REG) Voltage regulation accuracy AC dropout voltage (V(AC)-V(OUT)), V(DO) TA = 25°C VO(OUT) = VO(REG), IO(OUT) = 1A USB dropout voltage (V(USB) - V(OUT)), VO(OUT) = VO(REG) ISET2 = High V(DO) VO(OUT) = VO(REG) ISET2 = Low DS8020X Ver 1.1 June 2006 V 4.2 5 -0.5% 0.5% -1.5% 1.5% 400 500 400 500 100 150 mV EUP8020X Electrical Characteristics Over Recommended Operating Free-Air Temperature Range Parameter Conditions EUP8020X Unit Min. Typ. Max. Current Regulation VI(OUT) >V(LOWV), VCC ≥ 4.5 V VI(OUT) >V(LOWV), VCC ≥ 4.5 V ISET2 = Low VI(OUT) >V(LOWV), VCC ≥ 4.5 V ISET2 = High Voltage on ISET1 pin, VCC ≥ 4.5 V, VI(OUT) > V(LOWV), 50 mA ≤ IO(OUT) ≤ 1 A AC output current range, IO(OUT) (1) USB output current range, IO(OUT) Output current set voltage, V(SET) Output current set factor, K(SET) 50 1000 80 100 400 500 mA 2.410 2.460 2.510 304 320 336 10 mA ≤ IO(OUT) < 50 mA 294 320 346 1 mA ≤ IO(OUT) < 10 mA 246 320 416 2.8 3.0 3.2 V 250 375 500 ms 100 mA 260 mV Precharge and Short-Circuit Current Regulation Precharge to fast-charge transition Voltage on OUT pin threshold, V(LOWV) Deglitch time for fast-charge to precharge transition Precharge range, IO(PRECHG) (2) 0 V < VI(OUT) < V(LOWV) Voltage on ISET1 pin, Precharge set voltage, V(PRECHG) 0 V < VI(OUT) > V(LOWV) Charge Taper and Termination Detection Charge taper detection range, VI(OUT) > V(RCH) I(TAPER) (3) USB-100 charge taper detection level VI(OUT) > V(RCH), ISET2 = Low 8020F USB-500 charge taper detection level VI(OUT) > V(RCH), ISET2 = High 8020F Voltage on ISET1 pin, VO(REG) = 4.2V, Charge taper detection set voltage, V(TAPER) VI(OUT) > V(RCH) Voltage on ISET pin, VO(REG) = 4.2V, Charge termination detection set voltage, V(TERM) (4) VI(OUT) > V(RCH) Deglitch time for TAPER detection, tTPRDET Deglitch time for termination detection, tTRMDET Temperature Sense Comparator 5 230 245 5 V 100 mA 6.5 9 11 32 44 55 235 250 265 11 18 25 250 375 500 250 375 500 Low-voltage threshold, V(LTF) 2.49 2.515 2.54 High-voltage threshold, V(HTF) 0.495 0.510 0.525 102 112 122 µA 250 375 500 ms Current source, I(TS) Deglitch time for temperature fault, t(DEGL) K (SET) × V(SET) (1) I O(OUT) = R SET DS8020X Ver 1.1 June 2006 mV ms K (SET) × V(PRECHG) (2) I O(PRECHG) = R SET 6 V EUP8020X Parameter Conditions EUP8020X Unit Min. Typ. Max. Battery Recharge Threshold VO(REG) VO(REG) VO(REG) -0.10 -0.050 -0.150 Recharge threshold, VRCH Deglitch time for recharge detect, 250 375 500 t(DEGL) STAT1, STAT2, and PG Outputs Low-level output saturation voltage, IO = 5 mA 0.25 VOL ISET2, Charge Enable ( CE ), Timer and Termination Enable ( TTE ), and Timer Enable ( TE ) Inputs Low-level input voltage, VIL IIL = 10 µA 0 High-level input voltage, VIH CE , TE or TTE low-level input current, IIL CE , TE or TTE high-level input current, IIH ISET2 low-level input current, IIL IIL = 20 µA 1.4 ISET2 high-level input current, IIH IISET2 = VCC 0.4 V ms V V -1 1 IISET2 = 0 µA -20 40 ISET2 high-Z input current, IIH 1 V Timers Precharge time, t(PRECHG) 1,650 1,940 2,230 2,230 Taper time, t(TAPER) 8020A,8020B,8020C,8020D, 8020E,8020G 1,650 1,940 Charge time, t(CHG) 8020A,8020B,8020C,8020D,8020G 16,500 19,400 22,300 8020E,8020F 23,080 27,160 31,235 Timer fault recovery current, I(FAULT) Sleep Comparator Sleep-mode entry threshold voltage, V(SLP) Sleep mode exit threshold voltage, V(SLPEXIT) Sleep mode deglitch time 200 2.3 V ≤ VI(OUT) ≤ VO(REG) 2.3 V ≤ VI(OUT) ≤ VO(REG) s s µA VCC ≤ VI(OUT) +100 mV VCC ≥ VI(OUT) +190mV 250 375 500 V ms Thermal Shutdown Thresholds Thermal trip threshold, T(SHTDWN) 165 Thermal hysteresis 30 °C Undervoltage Lockout Undervoltage lockout V(UVLO) Decreasing VCC 2.2 Hysteresis (3) K (SET) × V(TAPER ) I O(TAPER ) = R SET DS8020X Ver 1.1 June 2006 2.4 20 (4) 7 K (SET) × V(TERM) I O(TERM) = R SET 2.6 V mV EUP8020X Application Information Figure 3. Operational Flow Chart DS8020X Ver 1.1 June 2006 8 EUP8020X Functional Description Autonomous Power Source Selection As default the EUP8020X attempts to charge from the AC input. If AC input is not present, the USB is selected. If both inputs are available, the AC adapter has the priority. See Figure 4 for details. The EUP8020X activates a safety timer, t(PRECHG), during the conditioning phase. If V(LOWV) threshold is not reached within the timer period, the EUP8020X turns off the charger and enunciates FAULT on the STATx pins. Please refer to the Timer Fault Recovery section for additional details. Figure 4.Typcial Charging Profile Temperature Qualification ( 8020A,8020D,8020E,8020F,8020G Only) The EUP8020X continuously monitors battery temperature by measuring the voltage between the TS and VSS pins. An internal current source provides the bias for most common 10-kΩ negative-temperature coefficient thermistors (NTC) (see Figure 5). The device compares the voltage on the TS pin against the internal V(LTF) and V(HTF) thresholds to determine if charging is allowed. Once a temperature outside the V(LTF) and V(HTF) thresholds is detected the device immediately suspend the charge. The device suspend charge by turning off the power FET and holding the timer value (i.e. timers are NOT reset). Charge is resumed when the temperature returns to the normal range. However the user may modify these thresholds by adding two external resistors. See Figure 6. Figure 5. Temperature Sensing Configuration Figure 6. Temperature Sensing Thresholds Battery Pre-Conditioning Battery Charge Current During a charge cycle if the battery voltage is below the V(LOWV) threshold, the EUP8020X applies a precharge current, IO(PRECHG), to the battery. This feature revives deeply discharged cells. The resistor connected between the ISET1 and VSS, RSET, determines the precharge rate. The V(PRECHG) and K(SET) parameters are specified in the specifications table. Note that this applies to both AC and USB charging. The EUP8020X offers on-chip current regulation with programmable set point. The resistor connected between the ISET1 and VSS, RSET, determines the AC charge rate. The V(SET) and K(SET) parameters are specified in the specifications table. I O(PRECHG) = V(PRECGH ) × K (SET ) R SET DS8020X Ver 1.1 June 2006 ------------ (1) 9 I O(OUT) = V(SET ) × K (SET ) R SET ---------------------- (2) When charging from a USB port, the host controller has the option of selecting either 100 mA or 500 mA charge rate using ISET2 pin. A low-level signal sets current at 100 mA and a high level signal sets current at 500 mA. A high-Z input disables USB charging. EUP8020X Battery Voltage Regulation The voltage regulation feedback is through the OUT pin. This input is tied directly to the positive side of the battery pack. The EUP8020X monitors the battery pack voltage between the OUT and VSS pins. When the battery voltage rises to VO(REG) threshold, the voltage regulation phase begins and the charging current begins to taper down. As a safety backup, the EUP8020X also monitors the charge time in the charge mode. If charge is not terminated within this time period, t(CHG), the EUP8020X turns off the charger and enunciates FAULT on the STATx pins. Please refer to the Timer Fault Recovery section for additional details. Charge Taper Detection, Termination and Recharge The EUP8020X monitors the charging current during the voltage regulation phase. Once the taper threshold, I(TAPER),is detected the EUP8020X initiates the taper timer, t(TAPER). Charge is terminated after the timer expires. The resistor connected between the ISET1 and VSS, RSET, determines the taper detection level. The V(TAPER) and K(SET) parameters are specified in the specifications table. Note that this applies to both AC and USB charging. V(TAPER ) × K (SET ) I (TAPER) = R SET V(TERM ) × K (SET ) R SET The EUP8020X enters the low-power sleep mode if both AC and USB are removed from the circuit. This feature prevents draining the battery during the absence of input supply. Charge Status Outputs The open-drain STAT1 and STAT2 outputs indicate various charger operations as shown in the following table. These status pins can be used to drive LEDs or communicate to the host processor. Note that OFF indicates the open-drain transistor is turned off. ------------------ (3) -------------------- (4) After charge termination, the EUP8020X re-starts the charge once the voltage on the OUT pin falls below the V(RCH) threshold. This feature keeps the battery at full capacity at all times. DS8020X Ver 1.1 June 2006 Sleep Mode Table 1. Status Pins Summary The EUP8020X resets the taper timer in the event that the charge current returns above the taper threshold, I(TAPER). In addition to the taper current detection, the EUP8020X terminates charge in the event that the charge current falls below the I(TERM) threshold. This feature allows for quick recognition of a battery removal condition or insertion of a fully charged battery. Note that charge timer and taper timer are bypassed for this feature. The resistor connected between the ISET1 and VSS, RSET, determines the taper detection level. The V(TERM) and K(SET) parameters are specified in the specifications table. Note that this applies to both AC and USB charging. I (TERM) = Note On EUP8020F The EUP8020F monitors the charging current during the voltage regulation phase. Once the taper threshold, I(TAPER),is detected the EUP8020F terminates the charge. There is no taper timer, t(TAPER) for this version. The resistor connected between the ISET1 and VSS, RSET, determines the taper detection level for AC input. For USB charge, taper level is fixed at 10% of the 100- or 500-mA charge rate. Also note that there is I(TERM) detection in EUP8020F. 10 CHARGE STATE Precharge in progress Fast charge in progress Charge done Charge suspend (temperature) Timer fault Sleep mode STAT1 STAT2 ON ON ON OFF OFF ON OFF OFF OFF OFF OFF OFF OFF means the open-drain output transistor on the STAT1 and STAT2 pins is in an off state. PG Output The open-drain PG (Power Good) indicates when the AC adapter is present. The output turns ON when a valid voltage is detected. This output is turned off in the sleep mode. The PG pin can be used to drive an LED or communicate to the host processor. EUP8020X CE Input (Charge Enable) The CE digital input is used to disable or enable the charge process. A low-level signal on this pin enables the charge and a high-level signal disables the charge and places the device in a low-power mode. A high-to-low transition on this pin also resets all timers and timer fault conditions. Note that this applies to both AC and USB charging. TTE Input (Timer and Termination Enable) The TTE digital input is used to disable or enable the fast-charge timer and charge taper detection. A low-level signal on this pin enables the fast-charge timer and taper timer and a high-level signal disables this feature. Note that this applies to both AC and USB charging. Thermal shutdown and Protection The EUP8020X monitors the junction temperature, TJ, of the die and suspends charging if TJ exceeds T(SHTDWN). Charging resumes when TJ falls below T(SHTDWN) by approximately 30 ℃. TE Input (Timer Enabled) The TE digital input is used to disable or enable the fast-charge timer. A low-level signal on this pin enables the fast-charge timer and a high-level signal disables this feature. Note that this applies to both AC and USB charging. Timer Fault Recovery As shown in Figure 3, EUP8020X provides a recovery method to deal with timer fault conditions. The following summarizes this method: Condition #1: Charge voltage above recharge threshold (V(RCH)) and timeout fault occurs Recovery method: EUP8020X waits for the battery voltage to fall below the recharge threshold. This could happen as a result of a load on the battery, self-discharge or battery removal. Once the battery falls below the recharge threshold, the EUP8020X clears the fault and starts a new charge cycle. A POR or CE or TTE toggle also clears the fault. DS8020X Ver 1.1 June 2006 11 Condition #2: Charge voltage below recharge threshold (V(RCH)) and timeout fault occurs Recovery method: Under this scenario, the EUP8020X applies the I(FAULT) current. This small current is used to detect a battery removal condition and remains on as long as the battery voltage stays below the recharge threshold. If the battery voltage goes above the recharge threshold, then the EUP8020X disables the I(FAULT) current and executes the recovery method described for condition #1. Once the battery falls below the recharge threshold, the EUP8020X clears the fault and starts a new charge cycle. A POR or CE or TTE toggle also clears the fault. EUP8020X Packaging Information TDFN-10 SYMBOLS MILLIMETERS MIN. MAX. MIN. MAX. A 0.70 0.80 0.028 0.031 A1 0.00 0.05 0.000 0.002 D 2.90 3.10 0.114 0.122 E1 DS8020X Ver 1.1 June 2006 INCHES 1.70 0.067 E 2.90 3.10 0.114 0.122 L 0.30 0.50 0.012 0.020 b 0.18 0.30 0.007 0.012 e 0.50 0.020 D1 2.40 0.094 12