LTC1980_1 LINER [Linear Technology], LTC1980_1 Datasheet
LTC1980_1
Related parts for LTC1980_1
LTC1980_1 Summary of contents
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FEATURES ■ Single Controller IC Includes Battery Charger Plus DC/DC Converter ■ Wall Adapter Voltage May be Above or Below Battery Voltage ■ LDO Controller Allows Simultaneous Charging and Regulating from Wall Adapter Input ■ Standalone Li-Ion Battery Charger Including ...
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LTC1980 ABSOLUTE AXI U RATI GS (Note GND ............................................. –0.5V to 12V REG V to GND ............................................. –0.5V to 12V BAT PROG, I .............................................. –0. SENSE PROGT, REGFB BATT1, BATT2 ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER V Recharge Threshold, Delta Voltage with Respect RCHG2 to Float Voltage, Measured at OVP V Charger Shorted Cell Threshold LT0 V Charger Shorted Cell Threshold LT1 I Input Bias ...
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LTC1980 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER V Digital Input Pull-Up Voltage, BATT1 P2 V Digital Input Low Voltage, BATT2 IL3 V Digital Input High Voltage, BATT2 IH3 I Digital Input Current ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Typical BGTDR and RGTDR Waveforms BGTDR 1V/DIV RGTDR 1V/DIV 1980 G07 V = 3.6V 1µs/DIV BAT V = 3.3V REG T = 25° 500mA L Burst Mode Circuit Operation V ...
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LTC1980 CTIO S PROG (Pin 1): Charge Current Ratio Programming Pin. Programs the full charge current when the charger is in the constant current mode. A resistor placed between the PROG pin and the PROGT ...
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CTIO S REG (Pin 15): Bidirectional Regulator Mode Control Pin. A pull-up resistor is required between this pin and V This pin is open when charging normally, has a weak pull- down (approximately 5µA) when ...
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LTC1980 W BLOCK DIAGRA V BIAS1 13 V REF REFERENCE V 18 BAT V MAX + V REF V REG V DD REG – BIAS2 L MODE 16 MODE BURST MODE OPERATION OFF OPEN ...
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U OPERATIO The LTC1980 designed to provide a regulated voltage to a system load from an unregulated or regulated wall adapter, or from a battery and also charge a battery, thereby providing an uninterruptable power source for ...
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LTC1980 U OPERATIO Lithium-Ion Battery Charger Operation With the wall adapter power applied, the LTC1980 oper- ates as a constant-current/constant-voltage PWM battery charger, with a portion of the adapter current used for charging and the rest flowing to the system ...
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U OPERATIO Transformer current is sensed across R and sampled through switch SW1. The current scaled-down replica of the battery charging current pulses from the transformer. During battery charging, switch SW2 is in the down position ...
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LTC1980 U U APPLICATIO S I FOR ATIO An external resistor divider (Figure 3) can be used to program other float voltages. Resistor values are found using the following equation: R10 = R11 • (V – V )/V FLOAT REF ...
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U U APPLICATIO S I FOR ATIO Current Sense Resistor Voltage drop in the current sense resistor should be limited to approximately ±100mV with respect to ground at max load currents in all modes. This value strikes a reasonable balance ...
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LTC1980 U TYPICAL APPLICATIO BH511-1014 V V REG BAT + + 4.1V C1 5.1Ω 5.1Ω Li-Ion 68µF BATTERY 1nF 1nF 1/2 FDC6401N 1/2 FDC6401N 50mΩ R SENSE BGTDR PGND GND I SENSE 18 V BAT 23 OVP ...
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PACKAGE DESCRIPTIO .254 MIN .0165 ± .0015 RECOMMENDED SOLDER PAD LAYOUT .007 – .0098 (0.178 – 0.249) .016 – .050 (0.406 – 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) 3. DRAWING NOT TO SCALE *DIMENSION ...
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LTC1980 RELATED PARTS PART NUMBER DESCRIPTION LT1170/LT1171/LT1172 5A/3A/1.25A Flyback Regulators LT1571 200kHz/500kHz Switching Battery Charger LTC1729 Lithium-Ion Battery Charger Termination Controllers Time or Charge Current Termination, Preconditioning 8-Lead MSOP LTC1731 Lithium-Ion Linear Battery Charger Controller LTC1732 Lithium-Ion Linear Battery Charger ...