LTC4097EDDB#PBF Linear Technology, LTC4097EDDB#PBF Datasheet

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... NTC therm- istor input used to monitor battery temperature and VNTC power present output with 120mA drive capability. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents including 6522118. ...

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LTC4097 ABSOLUTE MAXIMUM RATINGS (Note 1, DCIN USBIN t < 1ms and Duty Cycle < 1% .................. –0. Steady State ............................................. –0. BAT, ⎯ C ⎯ H ⎯ R ⎯ NTC, ...

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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 2kΩ unless otherwise noted. ITERM SYMBOL PARAMETER V Trickle Charge Threshold Voltage V TRIKL V DCIN Undervoltage Lockout UVDC Voltage V USBIN Undervoltage Lockout UVUSB Voltage V V ...

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LTC4097 TYPICAL PERFORMANCE CHARACTERISTICS Battery Regulated Output (Float) Voltage vs Charge Current 4. DCIN IDC 4.24 4.22 4.20 4.18 4.16 4.14 4.12 4.10 0 200 400 600 800 1000 1200 CHARGE CURRENT (mA) 4097 ...

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TYPICAL PERFORMANCE CHARACTERISTICS IDC Pin Voltage vs V DCIN (Constant-Current Mode) 1.006 V = 3.7V BAT R = 10k IDC 1.004 1.002 1.000 0.998 0.996 0.994 4.25 4.50 4.75 5.00 5.25 V (V) DCIN 4097 G10 Charge Current vs Battery ...

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LTC4097 TYPICAL PERFORMANCE CHARACTERISTICS DCIN Power FET On-Resistance vs Temperature 550 DCIN I = 200mA BAT 500 450 400 350 300 –50 – TEMPERATURE (°C) 4097 G19 VNTC VNTC 6 ...

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TYPICAL PERFORMANCE CHARACTERISTICS HPWR Pin Pulldown Resistance vs Temperature 4.5 4.0 3.5 3.0 2.5 –50 –25 0 TEMPERATURE (°C) Shutdown Supply Current vs Temperature and V 60 SUSP = V USBIN DCIN ...

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LTC4097 PIN FUNCTIONS DCIN (Pin 1): Wall Adapter Input Supply Pin. Provides power to the battery charger. The maximum supply current is 1.2A. This pin should be bypassed with a 1µF capacitor. USBIN (Pin 2): USB Input Supply Pin. Provides ...

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PIN FUNCTIONS IUSB (Pin 9): Charge Current Program for USB Power. The charge current is set by connecting a resistor ground. When charging in constant current mode, this pin servos to 1V. The voltage on this pin can ...

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LTC4097 BLOCK DIAGRAM VNTC – R NOM TOO COLD + NTC 6 TOO HOT – NTC 3 + NTC_EN – 10mA MAX CHRG 4 LOGIC RECHRG TRICKLE TERM 5 SUSP ...

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OPERATION The LTC4097 is designed to effi ciently manage charging a single-cell lithium-ion battery from two separate power sources: a wall adapter and USB power bus. Using the constant-current/constant-voltage algorithm, the charger can deliver up to 1.2A of charge current ...

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LTC4097 OPERATION Programming Charge Termination The charge cycle terminates when the charge current falls below the programmed termination threshold during constant-voltage mode. This threshold is set by connect- ing an external resistor from the ITERM pin to ITERM ...

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OPERATION Manual Shutdown The SUSP pin has a 3.4MΩ pulldown resistor to GND. A logic low enables the charger and a logic high disables it (the pulldown defaults the charger to the charging state). The DCIN input draws 20µA when ...

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LTC4097 OPERATION TRICKLE CHARGE MODE BAT < 2.9V 1/10th FULL CURRENT CHRG STATE: PULLDOWN BAT > 2.9V CHARGE 2.9V < BAT MODE FULL CURRENT CHRG STATE: PULLDOWN I < I BAT TERMINATE IN VOLTAGE MODE STANDBY MODE NO CHARGE CURRENT ...

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APPLICATIONS INFORMATION Using a Single Charge Current Program Resistor In applications where the programmed wall adapter charge current and USB charge current are the same, a single program resistor can be used to set both charge currents. Figure 2 shows ...

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LTC4097 APPLICATIONS INFORMATION The LTC4097 can be used above 64°C ambient, but the charge current will be reduced from 500mA. The ap- proximate current at a given ambient temperature can be approximated by: ° 115 C T – ...

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APPLICATIONS INFORMATION VNTC NTC BLOCK 3 0.765 • VNTC R – NOM 100k NTC + 6 R NTC 100k – 0.349 • VNTC + + – 0.1V Figure 4. Typical NTC Thermistor Circuit and the cold trip point is set ...

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... Q characteristics of ceramic capacitors can cause substantial ringing which could exceed the maximum voltage ratings and damage the LTC4097. Refer to Linear Technology Application Note 88, entitled “Ceramic Input Capacitors Can Cause Overvoltage Transients” for a detailed discussion of this problem. ...

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... APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

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... LTC4096/LTC4096X Dual Input Standalone Li-Ion Battery Charger LTC4410 USB Power Manager and Battery Charger TM LTC4411/LTC4412 Low Loss PowerPath Controller in ThinSOT ThinSOT and PowerPath are trademarks of Linear Technology Corporation Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...