EC9528A-XXXF5R

EC9528A E-CMOS | Alldatasheet

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Technical content

EC9528A Protection IC for 1-Cell Battery Pack DESCRIPTIONS The EC9528 A series are the 1 -cell protection IC for lithium-ion/lithium-polymer rechargeable battery pack. The high accuracy voltage detector and delay time circuits are built in EC9528A series with state-of-art design and process. To minimize power consumption, EC9528A series activates power down mode when an over-discharge event is detected (for power-down mode enabled version). Besides, EC9528A series performs protection functions with four external components for miniaturized PCB. The tiny package is especially suitable for compact portable device, i.e. slim mobile phone and Bluetooth earphone. FEATURE ■High Detection Accuracy - Over-charge Detection: ±15mV - Over-discharge Detection: ±35mV - Discharge Over-current Detection: ±10mV - Charge Over-current Detection: ±20mV ■ High Withstand Voltage - Absolute maximum ratings: 28V(VX pin and CO pin) ■ Ultra Small Package ： SOTX23X5 SOTX23X6 DFNX1.6X1.6X6L SONX1.6X1.6X6L APPLICATION ■ Mobile phone battery packs ■ Digital camera battery packs ■ Bluetooth earphone LiXion battery module

EC9528A Protection IC for 1-Cell Battery Pack Version Code Version Code Version Code Version Code Version Code Version Code Version Code Version SOT -23 -5 SOT -23 -6 DFN -1.6X1.6 -6L SON -1.6X1.6 -6L HFA - HFA 10 10 HFB - HFB 11 11 HQA HQA HQA - 13 HQB HQB HQB - 14 HQC - HQC 12 12 NHA NHA NHA - 15 NHB NHB NHB - 16

ORDERING INFORMATION

Note 1 ：： ：：Version code ( For marking) Part Number Package Marking Marking Information EC9528A-HQAB2R SOT23-5L BNXXX LLLL EC9528A-XXXB3R SOT23-6L BNXXX LLLL 1. BN ：Product code 2. XXX ：Version code(see note 1) 3. LLLL ：Lot No. EC9528A-XXXF4R DFN 1.6*1.6 6L BNXX LLLL EC9528A-XXXF5R SON 1.6*1.6 6L BNXX LLLL 1. BN ：Product code 2. XX ： Version code(see note 1) 3. LLLL ：Lot No. B2 ：SOT23-5L B3：SOT23-6L F4 ：DFN 1.6*1.6 6L F5 ：SON 1.6*1.6 6L R ：Tape & Reel Version type

EC9528A Protection IC for 1-Cell Battery Pack Version Code Pack- age Type Over- charge Detection Voltage VDET1 (V) Over- charge Hysteres is Voltage VHYS1 (V) Over- discharg e detection voltage VDET2 (V) Over- discharg e release voltage VREL2 (V) Discharg e over- current detection voltage VDET3 (V) Charge over- current detection voltage VDET4 (V) Load short- circuiting detection voltage VSHORT(V 0V Battery Charge Function Delay Time Table 2 Delay time Over-charge delay time tVDET1 (S) Over-discharge delay time tVDET2 (mS) Discharge over-current delay time tVDET3 (mS) Charge over-current delay time tVDET4 (mS) Load short-circuiting delay time tSHORT (uS) Product version code: Table1: Detection threshold level table Note: *: (Please check detail at below description) For Overcharge release condition: When the battery voltage is lower than V DET1 – V HYS1 and the V- pin voltage is between charge overcurrent detection voltage (V DET4 ) and short detection voltage (V SHORT ), the EC9528A series would release this condition. When the battery voltage is lower than V DET1 – V HYS1 and charger is removed, the EC9528A series can be released fromthis condition . Remark: Please contact our sales for the products with detection voltage value other than those specified above. Table2: Delay Time table Remark Please contact our sales office for the products with detection voltage value other than those specified above.

EC9528A Protection IC for 1-Cell Battery Pack Package and Pin Description

EC9528A Protection IC for 1-Cell Battery Pack Typical Application Circuit Block Diagram

EC9528A Protection IC for 1-Cell Battery Pack Symbol Descriptions Rating Units VDD Supply Voltage X0.3 to 7 V VX VX pin VDD X 28 to V DD + 0.3 V VCO CO pin VDD X28 to V DD + 0.3 V VDO Output Voltage DO pin Vss X 0.3 to V DD + 0.3 V TOPT Operating Temperature Range X40 to +85 °C TSTG Storage Temperature Range X55 to +125 °C Symbo l Item Conditions MIN TYP MAX Unit Detection Voltage VDET1 OverXcharge detection voltage XX VDET1 X0.015 VDET1 VDET1 +0.015 V VHYS1 OverXcharge hysteresis voltage XX VHYS1 X0.020 VHYS1 VHYS1 +0.020 V VDET2 OverXdischarge detection voltage XX VDET2 X0.035 VDET2 VDET2 +0.035 V VDET2 ≠ V REL2 VREL2 X0.050 VREL2 VREL2 +0.050 V VREL2 OverXdischarge release voltage VDET2 = V REL2 VREL2 X0.035 VREL2 VREL2 +0.035 V VDET3 Discharge overXcurrent detection voltage VDD =3.5V VDET3 X0.010 VDET3 VDET3 +0.010 V VDET4 Charge overXcurrent detection VDD =3.5V X0.12 X0.10 X0.08 V VSHORT Load shortXcircuiting detection voltage VDD =3.5V 0.40 0.50 0.60 V Detection Delay Time 【Table 2 Delay time (1) 】 tVDET1 Output delay time of overXcharge X 0.8 1.0 1.2 s tVDET2 Output delay time of overXdischarge X 100 125 150 ms tVDET3 Output delay time of discharge over current VDD =3.5V 6.4 8.0 9.6 ms tVDET4 Output delay time of charge over current VDD =3.5V 6.4 8.0 9.6 ms tSHORT Output delay time of Load shortXcircuiting detection VDD =3.5V 320 400 480 us Detection Delay Time 【Table 2 Delay time (2) 】 tVDET1 Output delay time of overXcharge X 0.96 1.2 1.44 s tVDET2 Output delay time of overXdischarge X 120 150 180 ms tVDET3 Output delay time of discharge over current VDD =3.5V 7.2 9.0 10.8 ms tVDET4 Output delay time of charge over current VDD =3.5V 7.2 9.0 10.8 ms tSHORT Output delay time of Load shortXcircuiting detection VDD =3.5V 240 300 360 us Absolute Maximum Ratings Applying any over “Absolute Maximum Ratings” practice can permanently damage the device. These data are indicated the absolute maximum values only but not implied any operating performance.

Electrical Characteristics

(For LiXion) (Ta = 25 ℃)

EC9528A Protection IC for 1-Cell Battery Pack Symbol Item Conditions MIN TYP MAX Unit Current Consumption (power-down function enabled) VDD Operating input voltage VDD - V SS 2.0 6.0 V IDD Supply current VDD =3.5V, V-=0V 1.0 3.0 5.5 uA ISTANDBY Power-down current (power-down function enabled IC only) VDD =1.8V, V- floating 0.1 uA 0V battery Charging Function V0CHA

0 V battery charge starting charger

0 V battery charging

function “available” 0.5 1.0 1.5 V V0INH 0V battery charge inhibition battery voltage function “unavailable” (Vcharger=4V~14V) 0.5 1.0 1.5 V Output Resistance R COH CO pin H resistance VCO =3.0V, V DD =3.5V, V-=0V 1.25 2.50 5.00 KΩ R COL CO pin L resistance VCO =0.5V, V DD =4.5V, V-=0V 0.75 1.50 3.00 KΩ R DOH DO pin H resistance VDO =3.0V, V DD =3.5V, V-=0V 1.25 2.50 5.00 KΩ R DOL DO pin L resistance VDO =0.5V, V DD =1.8V, V-=0V 1.75 3.50 7.00 KΩ V- internal Resistance R VMD Internal resistance between V- and VDD VDD =1.8V, V-=0V 100 300 900 KΩ R VMS Internal resistance between V- and VSS VDD =3.5V, V-=1.0V 50 100 300 KΩ (Continued)

EC9528A Protection IC for 1-Cell Battery Pack Symbol Item Conditions MIN TYP MAX Unit Detection Voltage VDET1 Over-charge detection voltage -- VDET1 -0.025 VDET1 VDET1 +0.025 V VHYS1 Over-charge hysteresis voltage -- VHYS1 -0.030 VHYS1 VHYS1 +0.030 V VDET2 Over-discharge detection voltage -- VDET2 -0.050 VDET2 VDET2 +0.050 V VDET2 ≠ V REL2 VREL2 -0.080 VREL2 VREL2 +0.080 V VREL2 Over-discharge release voltage VDET2 = V REL2 VREL2 -0.050 VREL2 VREL2 +0.050 V VDET3 Discharge over-current detection voltage VDD =3.5V VDET3 -0.015 VDET3 VDET3 +0.015 V VDET4 Charge over-current detection VDD =3.5V -0.13 -0.10 -0.07 V VSHORT Load short-circuiting detection voltage VDD =3.5V 0.35 0.50 0.65 V Detection Delay Time 【Table 2 Delay time (1) 】 tVDET1 Output delay time of over-charge - 0.7 1.0 1.3 s tVDET2 Output delay time of over-discharge - 88 125 163 ms tVDET3 Output delay time of discharge over current VDD =3.5V 5.0 8.0 11.0 ms tVDET4 Output delay time of charge over current VDD =3.5V 5.0 8.0 11.0 ms tSHORT Output delay time of Load short-circuiting detection VDD =3.5V 280 400 520 us Detection Delay Time 【Table 2 Delay time (2) 】 tVDET1 Output delay time of over-charge - 0.84 1.2 1.56 s tVDET2 Output delay time of over-discharge - 105 150 195 ms tVDET3 Output delay time of discharge over current VDD =3.5V 6.0 9.0 12.0 ms tVDET4 Output delay time of charge over current VDD =3.5V 6.0 9.0 12.0 ms tSHORT Output delay time of Load short-circuiting detection VDD =3.5V 210 300 390 us (For LiXion) (Ta = X10 oC to +60 oC)*

EC9528A Protection IC for 1-Cell Battery Pack Current Consumption (power-down function enabled) VDD Operating input voltage VDD – V SS 2.0 6.0 V IDD Supply current VDD =3.5V, V-=0V 1.0 3.0 6.0 uA ISTANDBY Power-down current (power-down function enabled IC only) VDD =1.8V, V- floating 0.1 uA 0V battery Charging Function V0CHA function “available” 0.3 1.0 1.7 V V0INH 0V battery charge inhibition battery voltage function “unavailable” 0.3 1.0 1.7 V Output Resistance RCOH CO pin H resistance VCO =3.0V, V DD =3.5V, V-=0V 1.00 2.50 5.00 KΩ RCOL CO pin L resistance VCO =0.5V, V DD =4.5V, V-=0V 0.60 1.50 3.00 KΩ RDOH DO pin H resistance VDO =3.0V, V DD =3.5V, V-=0V 1.00 2.50 5.00 KΩ RDOL DO pin L resistance VDO =0.5V, V DD =1.8V, V-=0V 1.40 3.50 7.00 KΩ V- internal Resistance RVMD Internal resistance between V- and VDD VDD =1.8V, V-=0V 78 300 900 KΩ RVMS Internal resistance between V- and VSS VDD =3.5V, V-=1.0V 26 100 300 KΩ (Continued) *: The specification for this temperature range is guaranteed by design because products are not screened at high to low temperature.

EC9528A Protection IC for 1-Cell Battery Pack Test Circuits Over-charge, over-discharge and the release detection voltages (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF, then EC9528A series enters operating mode. 2) Increase V1 voltage (from 3.5V) gradually. The V1 voltage is the over-charge detection voltage (V DET1 ) when CO pin goes low (from high). 3) Decrease V1 gradually. The voltage gap is the over-charge hysteresis detection voltage (V HYS1 ) when CO pin goes high again. 4) Continue decreasing V1. The V1 voltage is the over-discharge detection voltage (V DET2 ) when DO pin goes low. Then increase V1gradually. The V1 voltage is the over-discharge release detection voltage (V REL2 ), when DO pin returns to high. Note: The over-charge and over-discharge release voltages are defined in versions. Discharge over-current detection voltage (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF and EC9528A series enters operating condition. 2) Increase V2 (from 0V) gradually. The V2 voltage is the discharge over-current detection voltage (V DET3 ) when DO pin goes low (from high). Charge over-current detection voltage (test circuit 1) 1) Set V1=3.5V, V3=0V, S1=OFF and S2=ON and EC9528A series enters operating condition. 2) Increase V3 gradually. The V3 voltage is the charge over-current detection voltage (V DET4 ) when CO pin goes low (from high). Load short-circuiting detection voltage (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF and EC9528A series enters operating condition. 2) Increase V2 immediately (within 10uS) till DO pin goes “low” from high with a delay time which is between the minimum and the maximum of Load short-circuiting delay time. Over-charge, over-discharge delay time (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF to enter operating condition. 2) Increase V1 from VDET1-0.2V to VDET1+0.2V immediately (within 10us). The over-charge detection delay time (tVDET1) is the period from the time V1 gets to V DET1 +0.2V till CO pin switches from high to low. 3) Set V1=3.5V, V2=0V, S1=ON and S2 = OFF to enter operating condition. 4) Decrease V1 from V DET2 +0.2V to V DET2 -0.2V immediately (within 10us). The over-discharge detection delay time (tV DET2 ) is the period from the time V1 gets to V DET2 -0.2V till DO pin switches from high to low. Discharge over-current delay time (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF to enter operating condition. 2) Increase V2 from 0V to 0.25V immediately (within 10us). The discharge over-current detection delay time (tV DET3 ) is the period from the time V2 gets to 0.25V till DO pin switches from high to low. Charge over-current delay time (test circuit 1) 1) Set V1=3.5V, V3=0V, S1=OFF and S2=ON to enter operating condition. 2) Increase V3 from 0V to 0.3V immediately (within 10us). The charge over-current detection delay time (tV DET4 ) is the period from the time V3 gets to 0.3V till CO pin gets to low from high.

EC9528A Protection IC for 1-Cell Battery Pack Load short-circuiting delay time (test circuit 1) 1) Set V1=3.5V, V2=0V, S1=ON and S2=OFF to enter operating condition. 2) Increase V2 from 0V to 1.0V immediately (within 10us). The Load short-circuiting detection voltage delay time (tSHORT) is the period from the time V2 gets to 1.0V till DO pin switches from high to low. Operating & power down current consumption (test circuit 2) 1) Set V1=3.5V, V2=0V and S1=ON to enter operating condition and measure the current I1. I1 is the operating condition current consumption (I DD ). 2) Set V1=V2=1.8V and S1=ON enter over-discharge condition and measure current I1. I1 is the power down current consumption (I STANDBY ). Resistance between V- and VDD, V- and VSS (test circuit 2) 1) Set V1=1.8V, V2=0V and S1=ON and EC9528A series enters over-discharge condition. V1/I2 is the internal resistance between V- and V DD pin (R VMD ). 2) Set V1=3.5V, V2=1.0V and S1=ON and EC9528A series enters discharge over-current condition. V2/I2 is the internal resistance between V- and V SS pin (R VMS ). Output resistance (test circuit 3) 1) Set V1=3.5V, V2=0V, V3=3.0V, S1=OFF and S2=ON to enter operating condition. (V3-V1)/I2 is the internal resistance COH ). 2) Set V1=4.5V, V2=0V, V3 =0.5V, S1=OFF and S2=ON to enter over-charge condition. V3/I2 is the internal resistance (R COL ). 3) Set V1=3.5V, V2=0V, V3=3.0V, S1=ON and S2=OFF to enter operating condition. (V3-V1)/I2 is the internal resistance (R DOH ). 4) Set V1=1.8 V, V2=0V, V3 =0.5V, S1=ON and S2=OFF to enter over-discharge condition. V3/I2 is the internal resistance (R DOL ). 0V battery charge starting charger voltage (products with 0V battery charging function is “Available”) (test circuit 4) 1) Set V1=V2=0V, increase V2 gradually. 2) The V2 voltage is the 0V charge starting voltage (V 0CHA ) when CO pin switches from low to high (V V- + 0.1V or higher). 0V battery charge inhibition battery voltage (products with 0V battery charging function is “Unavailable”) (test circuit 4) 1) Set V1=1.6V, V2=-4V then decrease V1 gradually. 2) The V1 voltage is the 0V charge inhibition voltage (V 0INH ) when CO pin switches from low to high (V V- + 0.1V or higher). Note: The charger voltage should not be higher than 14V of 0V battery charge inhibition battery voltage. Shorten mode for overcharge and overdischarge functions by force voltage to Dout pin (test circuit 5) 1) Set V1=3.5V then NT1713 series enters operating mode. 2) Set V2= 0.5V, increase V1 voltage (from 3.5V) gradually. The V1 voltage is the over-charge detection voltage (V DET1 ) when CO pin goes low (from high). 3) Decrease V1 gradually. The voltage gap is the over-charge hysteresis detection voltage (V HYS1 ) when CO pin goes high again. 4) Continue decreasing V1. The V1 voltage is the over-discharge detection voltage (V DET2 ) when the voltage

EC9528A Protection IC for 1-Cell Battery Pack drop(VR1K*I1) on DO pin by shorten mode circuit. Then increase V1 gradually. The V1 voltage is the over-discharge release detection voltage (V REL2 ), when DO pin returns to high. Recommended: 1) '0 V charge available' doesn't means EC9528A series can recover the zero-V cell to be full charged if this cell has been already damaged due to too low voltage. 2) In EC9528A series, the '0 V charge inhibition' voltage is rather lower (0.5V). That is, EC9528A series allow charging such low voltage cell and recover it. 3) For safety consideration, we strongly recommended to select '0 V charge inhibition' to prevent from charging a damaged cell.

EC9528A Protection IC for 1-Cell Battery Pack Test Circuit

EC9528A Protection IC for 1-Cell Battery Pack Operation The EC9528A series provides over-charge, over-discharge, discharge over-current, charge over-current and load short-circuiting protections for the 1-cell battery pack. EC9528A series continuously monitors the voltage of battery between V DD pin and V SS pin to control over-charge and over-discharge protections. When the battery pack is in charging stage, the current flows from the charger to the battery through EB+ and EB-; the voltage between V- pin and V SS pin is negative. On the other hand, when the battery pack is in discharging stage, the current flows from battery to the load through EB+ and EB-; the voltage between V- pin and V SS pin is positive. The EC9528A series also monitors the voltage which is determined by the current of charge and discharge and the series Rds(on) of MOSFETs between V- pin and V SS pin to detect charge over-current and discharge over-current current conditions. (1) Normal Condition (Operation mode) The EC9528A series turns both the charging and discharging control MOSFETs on when the voltage of battery is in the range from over-charge detection voltage (V DET1 ) to over-discharge detection voltage (V DET2 ), and the VM pin voltage is in the range from over-current detection voltage (V DET4 ) to discharge over-current detection voltage (V DET3 ). This is called the normal condition that charging and discharging can be carried out freely. Caution: The EC9528A series may be needed connecting a charger to return to normal condition, when the battery is connected for the first time. (2) Over-charge Condition 1) Over-charge Protection: When the V DD voltage is higher than the over-charge detection voltage (V DET1 ) and lasts for longer than the over- charge detection delay time (tV DET1 ), EC9528A series turns off the external charging MOSFET to protect the pack from being over-charged, which CO pin turns to “L” from “H” level. 2) Over-charge Protection Release: When the battery voltage is lower than V DET1 - V HYS1 and the V- pin voltage is between charge over-current detection voltage (V DET4 ) and discharge over-current detection voltage (V DET3 ), the EC9528A series would be automatically released from this condition. When the battery voltage is lower than V DET1 and charger is removed, the EC9528A series can be automatically released from this condition. (3) Over-discharge Condition 1) Over-discharge Protection: When the V DD voltage is lower than the over-discharge detection voltage (V DET2 ) and lasts longer than over- discharge detection delay time (tV DET2 ), EC9528A series turns off the external discharge MOSFET to protect the pack from being over-discharged, which DO pin turns to “L” from “H” level. In over-discharge condition V- pin is pulled-up to VDD by a resistor (RVMD) between the V- pin and V DD pin. After that, when V- pin voltage is higher than V DD /2(Typ), the IC gets to power down mode. 2) Over-discharge Protection Release: The over-discharge protection is automatically released when (a) a charger is connected and V- pin voltage is lower than –0.7V (Typ.) and battery voltage is higher than the over- discharge voltage, or (b) a charger is connected, and V- pin voltage is higher than –0.7V (Typ.) and battery voltage is higher than the over- discharge release voltage.

EC9528A Protection IC for 1-Cell Battery Pack (4) Discharge Over-current Condition 1) Discharge Over-current Protection: The EC9528A series provides discharge over-current protection and load short-circuiting protection: (a) Discharge over-current protection occurs when V- pin voltage is between V DET3 and V SHORT and lasts for a certain delay time (tV DET3 ). (b) Load short-circuiting protection occurs when V- pin voltage is higher than V SHORT and lasts for a certain delay time (tSHORT). When above conditions happen, the DO pin goes “L” from ”H” to turn off the discharging MOSFET. In discharge over-current and load short-circuiting conditions, V- pin is pulled-down to VSS pin by the internal resistor (RVMS). 2) Discharge Over-current and Load Short-Circuiting Protection Release: The IC detects the status by monitoring V- pin voltage that is inversely proportional to the impedance (Rload) between two terminals (EB+ and EB-). The Rload increases while the V- pin voltage decreases. When the V- pin voltage equals to V SHORT or lower, discharge over-current status returns to normal mode and the circuit will be automatic recovery. The relation between V- and Rload is shown as follows: (5) Charge Over-current Condition The EC9528A series provides charge over-current protection to prevent the battery pack from being connected to an unexpected charger. 1) Charge Over-current Protection When the voltage of V- pin is lower than charge over-current detection voltage (V DET4 ) and lasts for a certain delay time (tDET4) or longer, the CO pin goes “L” from ”H” to turn off the charging MOSFET. 2) Charge Over-current Release: Charge over-current protection can be automatically released by disconnecting the charger. (6) Power Down Condition 1) Entering to Power Down Mode: EC9528A series enters the power down mode when over-discharge protection occurs and V- pin voltage is higher than V DD /2 (typical). The V- pin voltage is pulled-up to the V DD through the RVMD resistor. The internal circuits is shut off, therefore, the power-down current (I STANDBY ) is reduced to be low 0.1uA (Max.). 2) Power Down Mode Release: The power down mode is automatically released when a charger is connected and V- pin voltage is lower than V DD /2 (typical). Note: Power down condition is for power down mode enabled version only. Remark: Neotec provides the test mode on the DO pin by Vdd+0.5V, to reduce over-charge and over-discharge delay time.

EC9528A Protection IC for 1-Cell Battery Pack Timing Chart (1) Over-charge, Charge Over-current Operation (a) Normal condition (b) Over-charge condition *: The charger is assumed to charge with a constant current.

EC9528A Protection IC for 1-Cell Battery Pack (2) Over-discharge, Discharge Over-current, Load Short-Circuiting Operation (a) Normal condition (b) Over-discharge condition (c) Discharge over-current condition (d) Load short-circuit condition *: The charger is assumed to charge with a constant current.

EC9528A Protection IC for 1-Cell Battery Pack Recommended Application Circuit Table1 Constant for external components

EC9528A Protection IC for 1-Cell Battery Pack *1) If the threshold voltage of FET is lower than 0.4V, the FET may failed to stop the charging current. If the FET has a threshold voltage equal to or higher than the over-discharge detection voltage, discharging may be stopped before over-discharge is detected. If the charger voltage is higher than the withstanding voltage between the gate and source, the FET may be damaged. *2) Employing an over-specification (listed in above table) R1 may result in over-charge detection voltage and release voltage higher than the defined voltage If R1 has a higher resistance, the IC may be damaged caused by over absolute maximum rating of V DD voltage when a charger is connected reversely. *3) Applying a smaller capacitance C1 to system, DO may failed to function when load short-circuiting is detected. *4) R1 and R2 resistors are current limit resistance for a charger connected reversibly or a large voltage charger that exceeds the absolute rating for V CC is connected, when we connect reverse charger the current flows from charger to R2, internal ESD diode and R1. This current will increase R1 voltage drop. Which can exceed V CC (max). In this case better to use smaller value for R1 and bigger value for R2. But small value of R1 will reduce R-C filter performance and system ESD reliability. Too big value of R2 can cause over-current automatic release problem.If R2 resistance is higher than 2k Ω, the charging current may not be cut when a high-voltage charger is connected. *5) As followed this recommended table, the system ESD level could be reached at least ±12KV. We can improve system ESD by connect C2 ~ C5 capacitor of 0.1uF. Both C2 and C3 are protected MOSFET from being assaulted by system ESD. C4 and C5 are improved system ESD and reduce imported noise by load. Caution: 1) The above constants may be changed without notice. 2) The application circuit above is for reference only. To determine the correct constants, evaluation of actual application is required. Precautions: 1) The application condition for the input voltage, output voltage, and load current should not exceed the package power dissipation. 2) Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit.

EC9528A Protection IC for 1-Cell Battery Pack

Package Information

EC9528A Protection IC for 1-Cell Battery Pack

EC9528A Protection IC for 1-Cell Battery Pack

EC9528A Protection IC for 1-Cell Battery Pack