LT1512C LINER [Linear Technology], LT1512C Datasheet
LT1512C
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LT1512C Summary of contents
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FEATURES Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage Charges Any Number of Cells Up to 30V* 1% Voltage Accuracy for Rechargeable Lithium Batteries 100mV Current Sense Voltage for High Efficiency Battery Can Be Directly ...
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... Storage Temperature Range ................ – 150 C Ambient Temperature Range LT1512C (Note 3) .................................... LT1512I .............................................. – Operating Junction Temperature Range LT1512C (Note 3) ............................ – 125 C LT1512I ............................................ – 125 C Short Circuit ......................................... 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL C ...
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ELECTRICAL C HARA TERISTICS 5V 0.6V 0V REF FB SYMBOL PARAMETER V Output Switch ON Resistance SAT I Switch Current Limit LIM I Supply Current ...
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LT1512 W U TYPICAL PERFORMANCE CHARACTERISTICS Minimum Peak-to-Peak Synchronization Voltage vs Temp 3 700kHz SYNC 2.5 2.0 1.5 1.0 0 100 –50 – 125 150 TEMPERATURE ( C) 1512 G04 ...
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PIN FUNCTIONS be connected directly to the GND S pin or to the ground plane close to the point where the GND S pin is connected The switch pin is the collector of the power ...
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LT1512 U OPERATION current amplifier is set to a fixed gain of – 12.5 which provides a – 100mV current limit sense voltage. The error signal developed at the amplifier output is brought out externally and is used for frequency ...
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U U APPLICATIONS INFORMATION CONNECT D2 ANODE HERE FOR FULLY CHARGED BATTERY VOLTAGE LESS THAN 3.5V. Q1 WILL NOT BE TURNED OFF IN SHUTDOWN IF V SHUTDOWN Maximum Input Voltage Maximum input voltage for the circuit in Figure 1 is ...
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LT1512 U U APPLICATIONS INFORMATION Output Capacitor It is assumed as a worst case that all the switching output ripple current from the battery charger could flow in the output capacitor. This is a desirable situation neces- ...
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U U APPLICATIONS INFORMATION charging current. Maximum diode reverse voltage will be equal to input voltage plus battery voltage. Diode reverse leakage current will be of some concern during charger shutdown. This leakage current is a direct drain on the ...
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LT1512 U U APPLICATIONS INFORMATION from 24 to 200 . This causes a known increase in full- scale charging current (PWM = due to the 5k input resistance of the I pin. Note that 100% duty cycle ...
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PACKAGE DESCRIPTION 0.010 – 0.020 45 (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...
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LT1512 U TYPICAL APPLICATION The circuit in Figure 6 will provide adapter current limiting to ensure that the battery charger never overloads the adapter. In addition, it adjusts charging current to a lower value if other system power increases to ...