LT1571EGN-1#TR Linear Technology, LT1571EGN-1#TR Datasheet
LT1571EGN-1#TR
Specifications of LT1571EGN-1#TR
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LT1571EGN-1#TR Summary of contents
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... Li-Ion near full charge when the charge current drops to 20% of the programmed value. The LT1571-1 and LT1571-2 are in a 28-pin fused lead narrow SSOP power package. The LT1571 16-pin fused lead narrow SSOP power package. , LTC and LT are registered trademarks of Linear Technology Corporation. D3 MBRM120T3 V SW ...
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... CC1 CC2 CLOSE TO THE PINS ** ALL GND PINS ARE FUSED TO INTERNAL DIE ATTACH PADDLE FOR HEAT SINKING. CONNECT THESE PINS TO EXPANDED PC LANDS FOR PROPER HEAT SINKING 40 C/W THERMAL RESISTANCE ASSUMES AN INTERNAL GROUND PLANE DOUBLING AS A HEAT SPREADER ORDER PART NUMBER LT1571EGN-2 ...
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ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are 16V (LT1571-1, LT1571-2 10V (LT1571-5 outputs unless otherwise noted. (Note 6) PARAMETER ...
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LT1571 Series ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are 16V (LT1571-1, LT1571-2 10V (LT1571-5 outputs unless otherwise noted. (Note ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency of Figure 4 Circuit 100 V = 15V (EXCLUDING DISSIPATION INPUT DIODE D3 8.4V BAT 0.1 0.9 1.1 1.3 1.5 ...
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LT1571 Series CTIO S GND: Ground Pin. SW: NPN Power Switch Emitter. The Schottky catch diode must be placed with very short lead length in close proximity to SW pin and GND ...
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W BLOCK DIAGRA 80mV + + – 0.2V + BAT + – – GND 1.5V PWM V BAT C1 + – 75k CAP + FLAG E6 – NOTES: LT1571-2: R4 ...
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LT1571 Series U OPERATIO The LT1571 is a current mode PWM step-down (buck) charger. The battery charge current is programmed by a resistor R (or a DAC output current) at the PROG pin PROG (see Block Diagram). Amplifier CA1 converts ...
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U U APPLICATIO S I FOR ATIO is achieved with V at 1.1V. With a 0.33 F capacitor, the C time to reach full charge current is about 9ms and it is assumed that input voltage to the charger will ...
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LT1571 Series U U APPLICATIO S I FOR ATIO Lithium-Ion Charging The circuit in Figure 4 uses the 28-pin LT1571-2 to charge lithium-ion batteries at a constant 1A until the battery voltage reaches 8.4V preset battery voltage. The charger will ...
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U U APPLICATIO S I FOR ATIO For example, if 10% threshold is needed for the 1A charger (see Figure 4), then with R = 4.93k: PROG 1 331 • ...
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LT1571 Series U U APPLICATIO S I FOR ATIO C1 D1 0.22 F 1N5819 BOOST PROG 1 F L1** 300 33 H LT1571-1 D2 1N914 GND V 0 ...
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U U APPLICATIO S I FOR ATIO instead of V (see Figure 8). The optimum boost voltage BAT ( from 3V to 6V. X Then BAT BAT X P DRIVER For ...
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LT1571 Series U U APPLICATIO S I FOR ATIO Lower Dropout Voltage For even lower dropout and/or reducing heat on the board, the input diode D3 can be replaced with a FET (see Figure 11). Connect a P-channel FET in ...
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... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Internal Switch Can Be Used with Battery Chargers to Provide Charge Termination, Preset Voltages, C/10 Charge Detection and Timer Functions Charge Detection and Programmable Timer Charge Current for Li-Ion, NiCd, NiMH or Lead-Acid Batteries 1571f LT/TP 0700 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2000 ...