ltm8061 Linear Technology Corporation, ltm8061 Datasheet
ltm8061
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ltm8061 Summary of contents
Page 1
... The LTM8061 can be confi gured to terminate charging when charge current falls to one-tenth the programmed maximum current or to use an internal timer if a time- based termination scheme is desired ...
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... JMAX PART MARKING* PACKAGE DESCRIPTION 77-Lead (15mm × 9mm × 4.32mm) LTM8061V-41 77-Lead (15mm × 9mm × 4.32mm) LTM8061V-41 77-Lead (15mm × 9mm × 4.32mm) LTM8061V-42 77-Lead (15mm × 9mm × 4.32mm) LTM8061V-42 77-Lead (15mm × 9mm × 4.32mm) LTM8061V-82 77-Lead (15mm × ...
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... Operating Frequency l The denotes the specifi cations which apply over the full internal = 25°C. RUN = 2V. A CONDITIONS LTM8061-4.1/LTM8061-4.2 LTM8061-8.2/LTM8061-8.4 V Rising IN LTM8061-4.1/LTM8061-4.2 LTM8061-8.2/LTM8061-8.4, V Rising IN V Current = 2A INA LTM8061-4.1 LTM8061-4.2 LTM8061-8.2 LTM8061-8.4 (Note 3) LTM8061-4.1/LTM8061-4.2, Relative to BAT Float Voltage LTM8061-8 ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM8061E is guaranteed to meet performance specifi cations from 0°C to 125°C. Specifi cations over the –40°C to 125°C internal temperature range are assured by design, characterization and correlation with statistical process controls ...
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... I (mA) BAT Quiescent Current INA RUN = 2000 (V) INA LTM8061 4.1V BIAS BAT BAT 12V INA 24V V = 24V INA 500 2000 1000 I (mA) BAT 8061 G08 ...
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... LTM8061 TYPICAL PERFORMANCE CHARACTERISTICS Input Standby Current vs Temperature, 4.2V BAT 12V INA 24V INA –50 0 100 50 TEMPERATURE (°C) 8061 G16 Temperature Rise INA 500 1000 I BAT Temperature Rise ...
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... A temperature fault also causes this pin to be pulled low (see the Applications Information sec- tion). If RUN is low, or the LTM8061 is otherwise powered down, the state of the CHRG pin is invalid. NTC (Pin H6): Battery Temperature Monitor Pin. This pin is the input to the NTC (negative temperature coefficient) thermistor temperature monitoring circuit ...
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... If no fault condi- tions exist, the FAULT pin remains high impedance (see the Applications Information section). If RUN is low, or the LTM8061 is otherwise powered down, the state of the FAULT pin is invalid. TMR (Pin J6): End-Of-Cycle Timer Programming Pin. ...
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... BLOCK DIAGRAM V V /CLP INA INC 0.1μF 0.1μF INTERNAL COMPENSATION RUN RNG/SS TMR NTC V IN CURRENT MODE BATTERY MANAGEMENT CONTROLLER FAULT CHRG GND LTM8061 SENSE BAT 8.2μH RESISTOR 10μF BIAS 8061 BD 8061f 9 ...
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... The maximum charge current is internally set to approximately 2A. A maximum charge current programming pin (RNG/SS) allows the charge cur- rent to be reduced from the default 2A level. The LTM8061 also incorporates an input supply current limit control feature (V /CLP) that servos the battery charge current INC to accommodate overall system load requirements ...
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... Figure 1. Typical C/10 Terminated Charge Cycle (TMR Grounded, Time Not to Scale) BATTERY VOLTAGE BATTERY CHARGE CURRENT CHRG FAULT RUN Figure 2. Typical EOC (Timer-Based) Terminated Charge Cycle (Capacitor Connected to TMR, Time Not to Scale) < EOC t EOC LTM8061 FLOAT VOLTAGE RECHARGE THRESHOLD PRECONDITION THRESHOLD MAXIMUM CHARGE CURRENT PRECONDITION CURRENT C/10 0 AMPS ...
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... Maximum input supply current is set by connecting a sense resistor (R as shown in Figure 3. The LTM8061 begins to limit the charge current when the voltage across the sense resistor is 50mV. The maximum input current is defined by ...
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... Figure 4. LTM8061 Input Current vs System Load Current with 1.5A Input Current Limit RNG/SS: Dynamic Charge Current Adjust The LTM8061 gives the user the capability to reduce the maximum charge current dynamically through the RNG/SS pin. The maximum charge current of the LTM8061 is 2A and the control voltage range on the RNG/SS pin is 1V, so ...
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... Normal Charging at C/10 or Greater Low Low NTC Fault (Pause the battery is removed from an LTM8061 charger that is configured for C/10 termination, a low amplitude sawtooth waveform appears at the charger output, due to cycling between termination and recharge events. This cycling RNG/SS results in pulsing at the CHRG output. An LED connected to this pin will exhibit a blinking pattern, indicating to the user that a battery is not present ...
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... RNG/SS: Soft-Start section). Cycling the charger’s power or shutdown function initiates a new charge cycle, but the LTM8061 charger does not require a manual reset. Once a bad-battery fault is detected, a new timer charge cycle initiates if the BAT pin exceeds the precondition threshold voltage. During a bad-battery fault, a small current is sourced from the charger ...
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... The small size, robustness and low impedance of ceramic capacitors make them an attractive option for the input bypass capacitor of LTM8061. However, these capacitors can cause problems if the LTM8061 is plugged into a live input supply (see Application Note 88 for a complete dis- cussion). The low loss ceramic capacitor combined with ...
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... LTM8061. The bulk of the heat flow out of the LTM8061 is through the bottom of the module and the LGA pads into the printed circuit board. Consequently a poor printed circuit board design can cause excessive heating, resulting in impaired performance or reliability ...
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... LTM8061 PACKAGE DESCRIPTION bbb // 3.810 2.540 1.5875 1.270 0.9525 0.000 1.270 2.540 3.4925 3.810 4.1275 8061f ...
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... IN GND J3 GND K3 V /CLP INC GND J4 GND K4 V /CLP INC GND J5 GND K5 V INA NTC J6 TMR K6 RUN FAULT CHRG RNG/ LTM8061 PIN NUMBER PIN NUMBER E1 GND F1 GND E2 GND F2 GND E3 GND F3 GND E4 GND F4 GND E5 GND F5 GND E6 BAT F6 BAT E7 BAT F7 BAT PIN NUMBER ...
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... LTM8022 1A, 36V DC/DC μModule Regulator LTM8023 2A, 36V DC/DC μModule Regulator LTM8025 3A, 36V DC/DC μModule Regulator 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Termination and Reverse Input Protection LTM8061-8.4 V BAT INA V /CLP BIAS INC V IN RUN CHRG RNG/SS 4.7μ ...