ISL9205AIRZ-T

DATASHEET ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D FN9252 Rev 4.00 Dec 20, 2018 Li-ion Battery Charger The ISL9205, ISL9205A, ISL9205B, ISL9205C, and ISL9205D are integrated single-cell Li-ion or Li-polymer chargers capable of operating at an input voltage as low as 2.5V. The low operating voltage allows the charger to work with a variety of AC adapters. Features The ISL9205 family operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a standard Li-ion charge profile, that is, a Constant Current phase followed by a Constant Voltage phase (CC/CV). The charge current during the Constant Current phase is determined by the external resistor connected to the IREF pin. When the adapter output is a current-limited voltage source and the current limit is smaller than the programmed constant current of the IC, the ISL9205 operates as a pulse charger where the charge current is determined by the current limit of the AC adapter during the Constant Current phase. The ISL9205 operates in a linear mode during the constant voltage phase in both adapter cases. • Low component count and cost The ISL9205 family incorporates Thermaguard, which protects the IC against over-temperature. If the die temperature rises above a typical value of +100°C, the thermal foldback function reduces the charge current to prevent further temperature rise. The ISL9205 includes an external temperature monitoring function (not available in some package options). A Negative Temperature Coefficient (NTC) thermistor is connected between the TEMP pin and GND to monitor the battery or ambient temperature. The ISL9205 also includes a timer to set the time reference for various charge time limits. The timer is programmable with an external capacitor. Two logic inputs and two open-drain logic outputs are available for controlling the charger and indicating the charger status. The EN pin enables the charger. The TOEN pin (available in the ISL9205) enables the timeout function so that the charge is terminated when the preset time limits have been reached. The FAULT pin is an open-drain output that turns on when a fault condition is encountered. The STATUS pin is also an open-drain output that turns on when the charger is delivering current. • NTC interface (not available in some package options) FN9252 Rev 4.00 Dec 20, 2018 • Complete charger for single-cell Li-ion/polymer batteries • Integrated pass element and current sensor • No external blocking diode required • 25mV voltage accuracy over-temperature and input voltage range • 15mV voltage accuracy at room temperature • Programmable charge current • Programmable end-of-charge current (ISL9205) • Charge current thermal foldback for thermal protection (Thermaguard) • Trickle charge for fully discharged batteries • Power presence and charge indications • Less than 3µA leakage current off the battery when no input power attached or charger disabled • Ambient temperature range: -40°C to +85°C • DFN, QFN packages • Pb-free (RoHS compliant) Applications • Mobile phones • Bluetooth devices • PDAs • MP3 players • Stand-alone cradle or travel chargers • Other handheld devices Related Literature • For a full list of related documents, visit our website: - ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D device pages Page 1 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Ordering Information PART NUMBER (Notes 2, 3) PART MARKING TEMP. RANGE (°C) VBAT (V) VSEN TEMP TIMEOUT TAPE AND REEL (Units) (Note 1) PACKAGE (RoHS COMPLIANT) PKG DWG. # ISL9205IRZ DLBA -40 to +85 4.2 Yes Yes Yes - 16 Ld 3x3 QFN L16.3x3B ISL9205IRZ-T DLBA -40 to +85 4.2 Yes Yes Yes 6k 16 Ld 3x3 QFN L16.3x3B ISL9205AIRZ DLCA -40 to +85 4.2 Yes No No - 10 Ld 3x3 DFN L10.3x3 ISL9205AIRZ-T DLCA -40 to +85 4.2 Yes No No 6k 10 Ld 3x3 DFN L10.3x3 ISL9205BIRZ DLDA -40 to +85 4.2 Yes No Yes - 10 Ld 3x3 DFN L10.3x3 ISL9205BIRZ-T DLDA -40 to +85 4.2 Yes No Yes 6k 10 Ld 3x3 DFN L10.3x3 ISL9205CIRZ DLEA -40 to +85 4.256 Yes No Yes - 10 Ld 3x3 DFN L10.3x3 ISL9205CIRZ-T DLEA -40 to +85 4.256 Yes No Yes 6k 10 Ld 3x3 DFN L10.3x3 ISL9205DIRZ DLFA -40 to +85 4.2 No Yes Yes - 10 Ld 3x3 DFN L10.3x3 ISL9205DIRZ-T DLFA -40 to +85 4.2 No Yes Yes 6k 10 Ld 3x3 DFN L10.3x3 ISL9205EVAL1Z Evaluation board ISL9205AEVAL1Z Evaluation board ISL9205BEVAL1Z Evaluation board ISL9205CEVAL1Z Evaluation board ISL9205DEVAL1Z Evaluation board NOTES: 1. See TB347 for details about reel specifications. 2. 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. Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), see ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D device pages. For more information about MSL, see TB363. FN9252 Rev 4.00 Dec 20, 2018 Page 2 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Pin Configurations ISL9205A, ISL9205B, ISL9205C (10 LD DFN) TOP VIEW 13 VBAT 14 VBAT 15 VIN 16 VIN ISL9205 (16 LD QFN) TOP VIEW 3 8 IREF 3 TIME 4 9 TIME 4 7 V2P8 GND 5 6 EN 8 STATUS STATUS V2P8 VSEN 7 9 11 TEMP 10 IMIN EN 2 2 6 FAULT FAULT 5 10 VBAT 12 VSEN GND 1 1 TOEN VIN VIN IREF ISL9205D (10 LD DFN) TOP VIEW VIN 1 10 VBAT FAULT 2 9 TEMP STATUS 3 8 IREF TIME 4 7 V2P8 GND 5 6 EN Pin Descriptions ISL9205A, ISL9205B, PIN NAME ISL9205 ISL9205C ISL9205D DESCRIPTION VIN 1, 15, 16 1 1 Input power source. Connect to a wall adapter. FAULT 2 2 2 Open-drain output indicating fault status. This pin is pulled to LOW under any fault condition. When a fault condition occurs, the time counter resets. When the charger is disabled, the FAULT pin outputs high impedance. STATUS 3 3 3 Open-drain output indicating charging and inhibit states. This pin is pulled LOW when the charger is charging a battery. It turns into high impedance when the charge current drops to IMIN. This high impedance state is latched until a recharge cycle or a new charge cycle starts. When the charger is disabled, the STATUS pin outputs high impedance. TIME 4 4 4 Determines the oscillation period by connecting a timing capacitor between this pin and GND. The oscillator also provides a time reference for the charger. GND 5 5 5 Connection to system ground. TOEN 6 - - TIMEOUT enable input pin. Pulling this pin to LOW disables the TIMEOUT charge-time limit for the fast charge modes. Leaving this pin HIGH or floating enables the TIMEOUT limit. There is an internal 400kΩ pull-up resistor at this pin. EN 7 6 6 Enable logic input. Connect the EN pin to LOW to disable the charger or leave it floating to enable the charger. There is an internal 400kΩ pull-up resistor at this pin. V2P8 8 7 7 2.8V reference voltage output. This pin provides a 2.8V voltage source when the input voltage is above the POR threshold and outputs zero otherwise. The V2P8 pin can be used as an indication for adapter presence. FN9252 Rev 4.00 Dec 20, 2018 Page 3 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Pin Descriptions (Continued) ISL9205A, ISL9205B, PIN NAME ISL9205 ISL9205C ISL9205D IREF 9 8 8 DESCRIPTION Charge current programming and monitoring pin. Connect a resistor between this pin and GND to set the charge current during the Constant Current phase, as given by Equation 1: 80 I REF = ----------------R IREF A (EQ. 1) where RIREF is in kΩ. TEMP 11 - 9 Input for an external NTC thermistor. The TEMP pin is also used for battery removal detection. IMIN 10 - - End-of-Charge (EOC) current programming pin. Connect a resistor between this pin and GND to set the EOC current, as given by Equation 2: 8000 I MIN = ---------------R IMIN  mA  (EQ. 2) where RIMIN is in kΩ. VSEN 12 9 - Remote voltage sense pin. Connect this pin as close to the battery positive terminal as possible. If the VSEN pin is left floating, its voltage drops to zero volt and the charger operates in Trickle mode. VBAT 13, 14 10 10 Connection to the battery. Typically a ceramic capacitor of minimum 1µF is needed for stability when there is no battery attached. When a battery is attached, only a 0.1µF ceramic capacitor is required. FN9252 Rev 4.00 Dec 20, 2018 Page 4 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Typical Applications 5V WALL ADAPTER 1µF C1 1kΩ R1 1kΩ R2 VIN VBAT VIN VBAT VIN ISL9205IRZ D1 D2 FAULT STATUS TOEN EN 1µF C3 V2P8 BATTERY PACK RU VSEN T RT TEMP IREF IMIN RIMIN V2P8 TIME 1µF C2 GND RIREF 100kΩ 100kΩ CTIME 15nF FIGURE 1. TYPICAL APPLICATION: 3x3 QFN PACKAGE OPTION 5V WALL ADAPTER VIN 1µF C1 1kΩ R1 1kΩ R2 D1 D2 VBAT ISL9205AIRZ 1µF C2 BATTERY PACK VSEN FAULT STATUS IREF EN 1µF C3 V2P8 TIME GND RIREF 100kΩ CTIME 15nF FIGURE 2. TYPICAL APPLICATION: 3x3 DFN PACKAGE OPTION FN9252 Rev 4.00 Dec 20, 2018 Page 5 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Absolute Maximum Ratings Thermal Information Voltage Ratings for All Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .- 0.3V to 7V Charge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.0A ESD Rating Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200V Thermal Resistance JA (°C/W) JC (°C/W) 3x3 DFN Package (Note 4) . . . . . . . . . . . . . 48 6 3x3 QFN Package (Note 5) . . . . . . . . . . . . . 54 6 Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493 Recommended Operating Conditions Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Operating Supply Voltage (VIN Pin) . . . . . . . . . . . . . . . . . . . . . 4.25V to 6.5V Programmed Charge Current . . . . . . . . . . . . . . . . . . . . . . . 50mA to 900mA CAUTION: Stresses above those listed in “Absolute Maximum Ratings” can cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. The 150°C maximum junction temperature is for information purposes only. In reality, the current foldback feature prevents the junction from rising above a worst case temperature of 125°C. NOTES: 4. JA is measured in free air with the component mounted on a high-effective thermal conductivity test board with “direct attach” features. See TB379. 5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications PARAMETER Typical values are tested at VIN = 5V and the ambient temperature at +25°C, unless otherwise noted. SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 3.2 3.6 3.9 V 2.25 2.5 2.7 V 45 80 100 mV Charger disabled or the input is floating - - 3.3 µA POWER-ON RESET Rising POR Threshold VPOR Falling POR Threshold VPOR VBAT = 3.0V, use V2P8 pin to indicate the comparator output. VIN-BAT OFFSET VOLTAGE Rising Edge VOS VBAT = 4.2V, IBAT = 20mA, use STATUS pin to indicate the comparator output (Note 6) STANDBY CURRENT BAT Pin Sink Current ISTANDBY VIN Pin Supply Current IVIN Charger disabled - 150 250 µA VIN Pin Supply Current IVIN Charger enabled - 1.0 - mA VCH Tested at 50mA load, 5V input, and +25°C 4.185 4.20 4.215 V VCH -40°C < TA < +85°C, 4.3V < VIN < 6.5V 4.175 4.20 4.225 V VCH Tested at 50mA load, 5V input, and +25°C 4.241 4.256 4.271 V VCH -40°C < TA < +85°C, 4.3V < VIN < 6.5V 4.231 4.256 4.281 V VOLTAGE REGULATION Output Voltage (Except ISL9205C) Output Voltage (ISL9205C) rDS(ON) VBAT = 4.0V, charge current = 0.35A - 500 - µΩ Constant Charge Current ICC RIREF = 100kΩ, VBAT = 3.0V to 4.0V 760 800 840 mA Trickle Charge Current ITRK RIREF = 100kΩ, VBAT = 0V to 2.5V 64 80 96 mA End-of-Charge Current IMIN RIMIN = 100kΩ (ISL9205) 70 80 90 mA End-of-Charge Current IMIN RIREF = 100kΩ (ISL9205A, ISL9205B, ISL9205C and ISL9205D) 70 80 90 mA Load current less than 1mA 2.8 2.9 3.0 V PMOS ON-Resistance CHARGE CURRENT (Note 7) V2P8 PIN OUTPUT V2P8 Pin Output Voltage FN9252 Rev 4.00 Dec 20, 2018 VV2P8 Page 6 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Electrical Specifications Typical values are tested at VIN = 5V and the ambient temperature at +25°C, unless otherwise noted. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT VMIN 2.7 2.8 2.9 V VMINHYS 50 100 150 mV -225 -150 -70 mV VRCHHYS - 50 - mV TFOLD - 110 - °C CHARGE THRESHOLDS Preconditioning Charge Threshold Voltage Preconditioning Voltage Hysteresis Recharge Threshold Recharge Threshold Hysteresis VRCH Referenced to the charger output voltage VCH INTERNAL TEMPERATURE MONITORING Charge Current Foldback Threshold AMBIENT TEMPERATURE MONITORING (ISL9205 and ISL9205D) High Voltage Threshold V2P8 = 3.0V 1.98 2.0 2.02 V High Voltage Threshold Hysteresis V2P8 = 3.0V - 1.9 - V Low Voltage Threshold V2P8 = 3.0V 0.99 1 1.01 V Low Voltage Threshold Hysteresis V2P8 = 3.0V - 1.1 - V CTIME = 15nF 2.7 3.0 3.3 ms EN/TOEN Pin Logic Input High 1.3 - - V EN/TOEN Pin Logic Input Low - - 0.5 V 200 400 600 kΩ OSCILLATOR Oscillation Period tOSC LOGIC INPUT AND OUTPUTS EN/TOEN Pin Internal Pull-Up Resistance STATUS/FAULT Output Voltage when On 10mA current - - 0.8 V STATUS/FAULT Leakage Current VSTATUS = 6.5V - - 1 µA NOTES: 6. The 4.2V VBAT is selected so that the STATUS output can be used as the indication for the offset comparator output indication. If the VBAT is lower than the POR threshold, no output pin can be used for indication. 7. The charge current can be affected by the thermal foldback function if the IC under the test setup cannot dissipate the heat. FN9252 Rev 4.00 Dec 20, 2018 Page 7 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Typical Operating Performance Test conditions are: VIN = 5V, TA = +25°C, RIREF = RIMIN = 100kΩ, VBAT = 3.7V, 4.210 4.210 4.206 4.204 4.202 4.198 VBAT (V) VBAT (V) unless otherwise noted. 4.198 4.192 4.186 4.194 CHARGE CURRENT = 50mA 4.180 4.190 0.0 0.2 0.4 0.6 0.8 1.0 0 20 40 60 80 100 120 TEMPERATURE (°C) CHARGE CURRENT (mA) FIGURE 3. CHARGER OUTPUT VOLTAGE vs CHARGE CURRENT FIGURE 4. CHARGER OUTPUT VOLTAGE vs TEMPERATURE 4.30 IBAT = 50mA 0.96 4.24 4.18 0.84 IBAT (A) VBAT (V) 0.90 4.12 0.78 0.72 4.06 0.66 4.00 4.2 0.60 4.5 4.8 5.1 5.4 5.7 6.0 3.0 3.2 VIN (V) 3.4 3.6 3.8 4.0 4.2 VBAT (V) FIGURE 5. CHARGER OUTPUT VOLTAGE vs INPUT VOLTAGE CHARGE CURRENT IS 50mA FIGURE 6. CHARGE CURRENT vs OUTPUT VOLTAGE 1.00 0.90 0.72 IBAT (A) CHARGE CURRENT (mA) 0.96 0.86 0.58 0.84 0.78 0.72 0.44 0.30 0.66 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 7. CHARGE CURRENT vs AMBIENT TEMPERATURE FN9252 Rev 4.00 Dec 20, 2018 0.60 4.2 4.6 5.0 5.4 5.8 6.2 VIN (V) FIGURE 8. CHARGE CURRENT vs INPUT VOLTAGE Page 8 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Typical Operating Performance Test conditions are: VIN = 5V, TA = +25°C, RIREF = RIMIN = 100kΩ, VBAT = 3.7V, 2.90 2.90 2.88 2.88 2.86 2.86 VIN (V) V2P8 (V) unless otherwise noted. (Continued) 2.84 2.82 2.80 2.84 2.82 3.5 4.1 4.7 5.3 5.9 2.80 0.0 6.5 2.0 VIN (V) 6.0 8.0 10.0 FIGURE 10. V2P8 OUTPUT vs ITS LOAD CURRENT 1.0 1.20 0.9 1.08 0.8 0.96 rDS(ON) (Ω) rDS(ON) (Ω) FIGURE 9. V2P8 OUTPUT vs INPUT VOLTAGE 0.7 0.6 0.5 4.0 V2P8 LOAD CURRENT (mA) 0.84 0.72 0 20 40 60 80 0.60 100 2.9 3.1 3.3 TEMPERATURE (°C) FIGURE 11. rDS(ON) vs TEMPERATURE AT 3.7V OUTPUT 3.7 3.5 VBAT (V) 3.9 4.1 FIGURE 12. rDS(ON) vs OUTPUT VOLTAGE USING CURRENT LIMITED ADAPTERS 0.5 0.8 0.4 0.7 ENABLED ENABLED 0.3 Iq (mA) Iq (mA) 0.6 DISABLED 0.2 0.5 0.4 0.3 0.1 0.0 3.0 DISABLED 0.2 0.1 3.6 4.8 4.2 5.4 6.0 VIN (V) FIGURE 13. INPUT QUIESCENT CURRENT vs INPUT VOLTAGE FN9252 Rev 4.00 Dec 20, 2018 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 14. INPUT QUIESCENT CURRENT vs TEMPERATURE Page 9 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Functional Block Diagram Q MAIN VIN C1 VBAT ISEN INPUT_OK + CA - IR CURRENT REFERENCES VSEN V POR + - IREF VIN + - RIREF V2P8 VRECHRG IT V POR 100000:1 CURRENT MIRROR V MIN QSEN V CH REFERENCES TEMPERATURE MONITORING - + 80mV CHRG + VA - IMIN = IR/10 V CH + TRICKLE/FAST I SEN - MINBAT VMIN + - VRECHRG + MIN_I - INPUT_OK RECHARGE LOGIC ESD DIODE STATUS EN STATUS TEMP TIME GND TEMP MONITOR OSC COUNTER FAULT FAULT FIGURE 15. FUNCTIONAL BLOCK DIAGRAM FN9252 Rev 4.00 Dec 20, 2018 Page 10 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Theory of Operation The ISL9205 family are integrated chargers for single-cell Li-ion or Li-polymer batteries. They are capable of operating in two operation modes, Linear Charge mode and Pulse Charge mode. They function as traditional linear chargers when powered with a voltage source adapter. When powered with a current-limited adapter, the chargers function as pulse chargers by fully turning on the pass element, thereby reducing the power dissipation. TRICKLE 4.2V IREF Constant Voltage Phase When the battery reaches the final voltage, the ISL9205 switches the operation to a Constant Voltage (CV) phase. The output voltage is regulated at the final voltage value. During the Constant Voltage phase, the charge current reduces gradually as the cell voltage rises. End-of-Charge and Recharge As the charge current reaches the End-of-Charge (EOC) current threshold during the Constant Voltage phase, the STATUS pin open-drain FET is turned off to indicate an EOC condition. The EOC current is programmable for the ISL9205 by connecting a resistor from the IMIN pin to GND. For ISL9205A, ISL9205B, ISL9205C, and ISL9205D, the EOC current is fixed at 10% of the programmed constant charge current. When the STATUS pin indicates the EOC condition, the charger continues to charge until the EN pin is pulled to logic LOW or the input power has been removed. After EOC is reached, recharge occurs when the battery voltage falls to 150mV below the constant voltage value. The STATUS open-drain FET is turned on when a recharge condition is met. An internal delay is implemented at the STATUS pin for both EOC and recharge conditions to prevent nuisance trips due to noise and fast load current transitions. The delay time is approximately one clock cycle (varies between 0.5 and 1.5 clock) of the internal oscillator, which is programmed by the timer capacitor. The typical charge waveforms in Figure 16 show the complete cycle operation. FN9252 Rev 4.00 Dec 20, 2018 CV CHARGE VOLTAGE VREC CHARGE CURRENT 2.8V 10% IREF Constant Current Phase The ISL9205 family starts the charge at a Constant Current (CC) phase. The charge current is regulated to fast charge the battery before the final voltage has been reached. The charge current is programmable with the IREF pin and has two operation modes: Trickle mode and Constant Current mode, depending on the battery voltage. When the battery voltage is lower than 2.8V, the charger operates in Trickle mode where the charge current is set at 10% of the Constant Current mode current. Trickle mode is for preconditioning a deeply discharged battery. When the battery voltage is above the typical 2.8V threshold, the Constant Current mode starts. The constant current is programmable between 50mA to 1A. CC CHG IMIN STATUS INDICATION TIME FIGURE 16. TYPICAL CHARGE CYCLE WITH TIMEOUT Temperature Monitoring and Thermal Foldback In the event the die temperature reaches the thermal foldback threshold (+110°C typical), the charge current is reduced accordingly to prevent further temperature rise. In the ISL9205 and ISL9205D versions, there is an external temperature monitoring function. A Negative Temperature Coefficient (NTC) thermistor can be connected between the TEMP pin and GND to monitor the battery temperature or ambient temperature. The hysteresis comparators internal to the ISL9205 family provide a valid temperature window centered at the voltage of the TEMP pin, which is programmed by the NTC and the pull-up resistor connected to the pin. When the measured temperature is outside this window, the charger is paused (both the charger and the timer are stopped) and a fault indication is issued. If the thermistor is attached to the battery, the TEMP function can be used to discover a battery removal condition when the TEMP pin voltage is much higher than the reference threshold. POR The Power-On Reset (POR) function monitors the supply voltage. The POR has a rising edge threshold of 3.6V typical and 2.5V typical for the falling edge. The charger is expected to operate when the input voltage is above the POR threshold. After POR, the charger continues to operate for supply voltage down to 2.5V, typical. It is also required that the supply voltage be higher than the VBAT pin voltage by a typical 80mV for the charger to function. Page 11 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Oscillator, TIMEOUT, and Charge Cycle The ISL9205 family incorporates an oscillation circuit using an external timing capacitor connected to the TIME pin. The oscillator sets the limit for the maximum charge time during the Trickle mode and the fast mode (CC and CV). The maximum charge time (TIMEOUT) for the fast mode is set by: TIMEOUT = 222tOSC where the tOSC is the oscillator period. The minimum programmable tOSC is 20µs (CTIME = 100pF). The time limit for the trickle charge is 1/8 of the fast mode time limit. In the ISL9205 family, the timeout function can be disabled by pulling the TOEN pin to logic LOW. When TIMEOUT is disabled, the charger is never turned off in Constant Current and Constant Voltage modes. For the ISL9205B and the ISL9105D, the timeout function is always enforced. For the ISL9105A, there is not timeout function. A charge cycle is the time interval between the time when the charger is enabled to the moment it is disabled. If the battery voltage is lower than the trickle charge threshold at the time the charger is enabled, the charger enters the Trickle mode and the timer is reset and its limit is set to 1/8 of TIMEOUT. If the timeout function is enabled, the charger stops and indicates a TIMEOUT fault if the charge time is longer than the limit. If the Trickle mode completes successfully before the time limit, the charger moves to CC mode and the timer is reset and the time limit is set to TIMEOUT. The charger needs to reach the EOC conditions before the TIMEOUT interval elapses, otherwise, a TIMEOUT fault is issued. The charger indicates the EOC with the STATUS pin but does not terminate charging. Disabling TIMEOUT with TOEN In the ISL9205 family, the timeout function in fast charge state (CC/CV) can be disabled by pulling the TOEN pin to logic LOW. The timeout function for the Trickle Charge mode can not be disabled. Note that in the ISL9205A, there is no timeout function for both the trickle and the CC/CV intervals, whereas in the ISL9205 with TOEN set pulled to LOW, there is no timeout for the CC/CV interval but the timeout function for the trickle interval is still enforced. Indications The ISL9205 family has two open-drain status indication pins. These two pins are FAULT and STATUS. These pins require an external pull-up resistor to function properly. The V2P8 pin can be used to indicate the presence of an AC adapter. When an adapter pulses in, V2P8 is at 2.8V (logic Hi), otherwise V2P8 pin is at zero voltage (logic Lo). Charger Disable The EN pin allows the user to disable the charger. When the charger is disabled, all internal circuits are shut down and the quiescent current at the input pin is less than a typical value of 150µA. Remote Battery Voltage Sensing In the ISL9205, ISL9205A, ISL9205B, and ISL9205C versions, a Kelvin sense pin is provided for battery terminal voltage monitoring. Thus, the IR drop due to the connection leads and PCB traces can be eliminated, resulting in a more accurate battery voltage monitoring, especially when the battery is located at a FN9252 Rev 4.00 Dec 20, 2018 significant distance away from the ISL9205. If remote sensing is not needed, the VSEN pin can be connected to VBAT at the IC. Applications Information PCB Layout Guidance The ISL9205 family uses thermally-enhanced QFN/DFN packages that have an exposed thermal pad at the bottom side of the package. The layout should connect as much as possible to copper on the exposed pad. Typically, the component layer is more effective in dissipating heat. The thermal impedance can be further reduced by using other layers of copper connecting to the exposed pad through a thermal via array. A minimum of four such thermal vias are recommended. Each thermal via is recommended to have 0.3mm diameter and 0.7mm distance from other thermal vias. Stability Consideration The ISL9205 should behave like a current and thermal limited linear regulator. The charger operation is stable with an output ceramic decoupling capacitor in the range of 1µF to 200µF, with or without a battery connected. Input Bypass Capacitor Due to the inductance of the power leads of the wall adapter or USB source, the input capacitor type must be properly selected to prevent high voltage transients during a hot-plug event. A tantalum capacitor is a good choice for its high ESR, providing damping to the voltage transients. Multi-layer ceramic capacitors, however, have a very low ESR and hence, when chosen as input capacitor, a 1Ω series resistor must be used to provide adequate damping, as shown in the “Typical Applications” on page 5. State Machine Diagram The state machine diagram is shown in Figure 17 on page 13. The diagram starts with the Power-Off state. When the input voltage rises above the POR threshold, the charger resets itself. Then, if the charger is disabled, the charger stays in the Charger Disabled state. If the charger is enabled, the trickle charge starts. At any time, when entering the trickle charge state, the internal TIMEOUT timer is reset. Two paths to exit the trickle charge are: • When the battery voltage rises above the preconditioning charge threshold within the 1/8 TIMEOUT interval • When the 1/8 TIMEOUT interval has been elapsed before reaching the preconditioning charge voltage threshold When a TIMEOUT fault occurs, the charger enters the TIMEOUT fault state. Two ways to exit the TIMEOUT fault state are: • Toggling the EN input • Re-cycling the input power If the charger finishes the trickle charger before the 1/8 TIMEOUT limit, it moves to the fast charge state. When entering the fast charge state, the TIMEOUT timer is reset as well. If the charger hits EOC conditions before the TIMEOUT, the charger enters Charge Compete state. The charger stays on, but the STATUS indicates EOC condition. When VBAT drops below the recharge threshold, the STATUS pin turns to logic low to indicate charging again. Page 12 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D PWR OFF CHARGER: OFF STATUS: OFF FAULT: OFF V IN > V POR NOT ENABLED POR CHARGER: OFF STATUS: OFF FAULT: OFF CHARGER DISABLED CHARGER: OFF STATUS: OFF FAULT: OFF ANYTIME EN PIN CHANGES TO DISABLE TEMP FAULT REMOVED TEMP FAULT CHARGER: OFF ENABLED TRICKLE CHARGE CHARGER: ON STATUS: OFF FAULT: ON DISABLE V BAT DROPS BELOW VMIN TIMEOUT FAULT) TIMEOUT CHARGER: OFF STATUS: ON FAULT: OFF STATUS: OFF FAULT: ON ANYTIME A TEMP FAULT OCCURS (EXCEPT IN VBAT < V MIN WHEN 1/8 TIMEOUT COMPLETES V BAT > VMIN BEFORE 1/8 TIMEOUT COMPLETES FAST CHARGE TO CHARGER DISABLED BLOCK CHARGER: ON STATUS: ON FAULT: OFF TIMEOUT V BAT > VRCH and I CHG< I MIN CHARGE COMPLETE VBAT < V RCH CHARGER: ON STATUS: OFF FAULT: OFF FIGURE 17. STATE MACHINE DIAGRAM FN9252 Rev 4.00 Dec 20, 2018 Page 13 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Visit our website to make sure you have the latest revision. DATE REVISION Dec 20, 2018 FN9252.4 Updated Ordering Information table. Added tape and reel column, parts, added evaluation boards, and updated Note 1. Combined Pin Description tables into one table. Updated typo in Charger Disable section, page 13. Changed “150mA” to “150µA”. Removed About Intersil section. Updated disclaimer. Sep 30, 2016 FN9252.3 Changed ISL9205 part number throughout to ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D. Updated entire datasheet applying Intersil’s new standards. Added Revision History and About Intersil sections. Edited on page 4 from “Typically a 10µF Tantalum capacitor is needed for stability when there is no battery attached” to “Typically a ceramic capacitor of minimum 1µF is needed for stability when there is no battery attached”. FN9252 Rev 4.00 Dec 20, 2018 CHANGE Page 14 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Package Outline Drawings For the most recent package outline drawing, see L16.3x3B. L16.3x3B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 1, 4/07 4X 1.5 3.00 12X 0.50 A B 6 PIN 1 INDEX AREA 6 PIN #1 INDEX AREA 16 13 12 3.00 1 1 .70 + 0.10 - 0.15 4 9 0.15 (4X) 5 8 0.10 M C A B + 0.07 TOP VIEW 4 16X 0.23 - 0.05 16X 0.40 ± 0.10 BOTTOM VIEW SEE DETAIL "X" 0.10 C 0 . 90 ± 0.1 C BASE PLANE SEATING PLANE 0.08 C ( 2. 80 TYP ) ( 1. 70 ) SIDE VIEW ( 12X 0 . 5 ) ( 16X 0 . 23 ) C 0 . 2 REF 5 0 . 00 MIN. 0 . 05 MAX. ( 16X 0 . 60) TYPICAL RECOMMENDED LAND PATTERN DETAIL "X" NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 indentifier may be either a mold or mark feature. FN9252 Rev 4.00 Dec 20, 2018 Page 15 of 17 ISL9205, ISL9205A, ISL9205B, ISL9205C, ISL9205D Package Outline Drawing For the most recent package outline drawing, see L10.3x3. L10.3x3 10 LEAD DUAL FLAT PACKAGE (DFN) Rev 11, 3/15 3.00 5 PIN #1 INDEX AREA A B 1 5 PIN 1 INDEX AREA (4X) 3.00 2.00 8x 0.50 2 10 x 0.23 0.10 1.60 TOP VIEW 10x 0.35 BOTTOM VIEW (4X) 0.10 M C A B 0.415 0.200 0.23 0.35 (10 x 0.55) SEE DETAIL "X" (10x 0.23) 1.00 MAX 0.10 C 0.20 2.00 (8x 0.50) BASE PLANE C SEATING PLANE 0.08 C SIDE VIEW 0.415 C 1.60 0.20 REF 4 0.05 2.85 TYP DETAIL "X" TYPICAL RECOMMENDED LAND PATTERN NOTES: FN9252 Rev 4.00 Dec 20, 2018 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends). 5. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. Page 16 of 17 Notice 1. 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