ETA6096 ETA | Alldatasheet
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Technical content
www.etasolution.com 1 Empowering Thinkers 32V Input Standoff Voltage, 2.5A Switching Mode Battery Charger DESCRIPTION FEATURES ETA6096 is a high efficiency, switching Li-Ion battery charger capable of delivering up to 2.5A of charging current to the battery. For charging, it uses a proprietary control scheme that eliminates the current sense resistor for conventional constant current control, maximizing efficiency, reducing charging time and reducing costs. An OVP function protects the IC itself and its downstream system against input voltage surges. With this OVP function, the IC can stand off input voltage as high as 32V, making it an ideal solution for industrial applications. ETA6096 is suitable for charging a 4.2V Li-ion battery. And ETA6096 is in DFN3x3-10 package. Switching Charger 32V Input Standoff Voltage Input Over Voltage Protection 60ns Fast OVP Transient Response Up to 94% Efficiency Up to 2.5A Max charging current No-Battery detection No External Sense Resistor DFN3x3-10 Package RoHS Compliant
APPLICATIONS
Tablet, MID Smart Phone TYPICAL APPLICATION 7 6 VIN ISET AGND AGND PMID SW BATS PGND ETA6096 Riset VIN 22uF 2.2uH 10uF Li+ Battery 1uF Option al, to real-tim e a dj us t c ha rg e cu rr en t Vpwm R1 9STAT ORDERING INFORMATION PART No. PACKAGE TOP MARK Pcs/Reel ETA6096D3K DFN3x3-10 ETA6096 YWW2L 5000
www.etasolution.com 2 Empowering Thinkers PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS Top View ETA6096 5 6 10VIN PMID PGND NC SW AGND STAT ISET AGND BATSAGND DFN3x3-10 (Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.) Operating Temperature Range …………...–40°C to 85°C Storage Temperature Range …………..–55°C to 150°C Thermal Resistance θ JC θJA Lead Temperature (Soldering, 10sec) ……….…….260°C ESD HBM (Human Body Mode) ……..………….…….2KV
ELECTRICAL CHARACTERISTICS
(VIN = 5V, unless otherwise specified. Typical values are at TA = 25oC.) PARAMETER CONDITIONS MIN TYP MAX UNITS INPUT Input Standoff Voltage 32 V Input Range 4.5 5.5 V Input UVLO Voltage Rising, Hys=500mV 4.5 V Input OVP Voltage Rising, Hys=320mV 5.89 6.08 6.27 V VPMID(VHOLD) VHOLD=4.53V 4.53 V Input Operation Current Switching 5 mA No Switching 900 uA OVP Switch RDSON VIN=5V, IOUT=1A, 25 oC 45 50 mΩ Discharge Resistance 197 Ω Tpower-on Power ON delay 20 ms BATTERY CHARGER Battery CV Voltage IBAT =0mA, default 4.17 4.21 4.25 V Charger Restart Threshold From DONE to Fast Charge 160 mV Battery Pre-Condition Voltage VBAT Falling, Hys=250mV 2.9 V Pre-Condition Charge Current 200 mA Quiescent Current at BAT VBAT=3.6V 20 uA Fast Charge Current RISET =82KΩ 2 A RISET =150KΩ 1.2 A Charge Termination Current 130 mA
www.etasolution.com 3 Empowering Thinkers PARAMETER CONDITIONS MIN TYP MAX UNITS Charge Termination Blanking time 16 S High side Pmos Rdson Isw=500mA 120 mΩ Low side Nmos Rdson Isw=500mA 100 mΩ ISET ISET Voltage Normal Charging 0.8 V ISET Voltage Stop Charging 1 V THERMAL PROTECTION Charging Thermal Regulation threshold 85 oC Thermal Shutdown Rising, Hys=20oC 150 oC PIN DESCRIPTION PIN # NAME DESCRIPTION 1 VIN Input pin. Bypass with a 1uF capacitor to GND. 2 PMID Connection point between internal OVP and charger. Bypass with a 22uF ceramic capacitor from PMID to GND. This capacitor should be close to the PMID pin.
3 PGND Power Ground pin
4 NC No Connection
5 SW Switching Pin. Connect with an inductor between this pin and positive terminal of battery 6 BATS Battery Voltage sense pin. Connect to the battery positive terminal with a separate sensing wire to avoid voltage drop to achieve accurate battery CV charging 8 ISET Charging Current setting pin. Connect a resistor between this pin and analog ground to set the current level. 9 STAT Charge status indication pin. When in charging, STAT is pulled low. And STAT become high-impedance when charging is completed. 7,10/ Exposed pad AGND Analog Ground.
www.etasolution.com 4 Empowering Thinkers TYPICAL CHARACTERISTICS (Vin=5V, TA=250C, unless otherwise specified) Complete charging cycle of a 5600mAH battery at 2.15A charge current 0.5 1.5 2.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Icharge (A) Vbat (V) Charge Current Vs. Battery Voltage Vin=5V Iset=2A 80% 85% 90% 95% 100% 1 1.5 2 2.5 3 3.5 4 4.5 5 Efficiency (V) Vbat (V) Charging Efficiency Vs. Battery Voltage Vin=5V Iset=2A 2.5 3.5 4.5 0.5 1.5 2.5 0 30 60 90 120 150 180 210 240 Vbat(V) I_Charge (A) time (minutes) Icharger=2.1A 5600mAH Battery
www.etasolution.com 5 Empowering Thinkers FUNTIONAL DESCRITION ETA6096 is a switching Li -Ion battery charger capable of delivering up to 2.5A of charging current to the battery. With OVP function, the IC can stand off input voltage as high as 32V, making it an ideal solution for industrial applications. It features pre -charging, fast charging(CC) and constant voltage(CV ) charging, end -of charging termination, and auto-recharge. Charge current can be set by an external resistor connecting to ISET pin, and charge status is output by STAT pin. CC/CV Regulation Loop There are CC/CV regulation loops built in ETA6096, with regulates either current or voltage as necessary to ensure fast and safe charging of the battery. In a normal charge cycle, this loop regulates the current to the value set by the external resistor at the ISET pin. Charging continues at this current until th e battery cell voltage reaches the termination voltage. At this point, the CV loop takes over, and charge current is allowed ti decrease as necessary to maintain charging at the termination voltage. Precondition Charge A new charging cycle begins with the precondition state, and operation continues in this state until Vbat exceeds the precondition threshold voltage. When operating in precondition state, the cell is charged at 200mA. Once Vbat reaches the precondition threshold voltage, the state machine jumps to the fast charge state. Fast Charge If battery voltage is above preconditioning threshold, buck converter chargers battery with constant current. In fast charge state, the ETA6096 charges at the current set by external resistor connected at ISET pin. For example, a 2A fast charge current can be achieved by setting the resistor to be 82K. During a normal charge cycle, fast charge continues in CC mode until Vbat reaches the charge termination voltage, at which point the ETA6096 enters into top off state. Top off With the battery voltage approaches the end of charge (EOC) voltage (4.2V, preset internally), charge current decreases as charging continues. In the top off state, the cell is charged in constant voltage (C V) mode. During a normal charging cycle, charging proceeds until the charge current decreases below 130mA, the EOC threshold. And then, the state machine terminates the charge cycle and jumps to the EOC state. End of charge When charge current decreases to 130mA, the buck converter ceases and keep monitoring the battery voltage. Recharge When battery voltage drops by 160mV below the EOC voltage, the Buck converter is turned on again, and re -start the constant current charge cycle.
www.etasolution.com 6 Empowering Thinkers ADJUSTING CHARGE CURRENT by PWM VOLTAGE 7 6 VIN ISET AGND AGND PMID SW BATS PGND ETA6096 Riset VIN 22uF 2.2uH 10uF Li+ Battery 1uF Option al, to real-tim e a dj us t c ha rg e cu rr en t Vpwm R1 9STAT As given by above application circuit, one can real -time adjust the charge current by a PWM signal with different duty- cycle. The Vpwm is the RC filtered voltage of the PWM signal, and it will change linearly with the duty-cycle of the PWM signal. Followings are 2 examples of charge current’s relationship to Vpwm. Please contact ETA engineers if one wants to have specific real-time charge current setting, the choosing of R1 and Rset value will be provided quickly. Charge Current Vs. Vpwm at R1=200K, Rset=160K Charge Current Vs. Vpwm at R1=220K, Rset=130K 0.5 1.5 2.5 0 0.5 1 1.5 2 Icharger（A） Vpwm(V) 0.5 1.5 2.5 0 0.5 1 1.5 2 Icharger（A） Vpwm(V)
www.etasolution.com 7 Empowering Thinkers PCB GUIDELINES ETA6096 5 6 10VIN PMID PGND NC SW AGND STAT ISET AGND BATS 22uF 2.2uH VIN 1uF VBAT AGND PGND 10uF AGND PACKAGE OUTLINE
www.etasolution.com 8 Empowering Thinkers TAPE AND REEL INFORMATION