LTC4058 Linear Technology, LTC4058 Datasheet
LTC4058
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LTC4058 Summary of contents
Page 1
... LTC4058 ideally suited for portable applications. Fur- thermore, the LTC4058 is designed to work within USB power specifications. The LTC4058 can Kelvin sense the battery terminal for more accurate float voltage charging. No external sense resistor or external blocking diode are required due to the internal MOSFET architecture ...
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... CHG R = 10k, Current Mode PROG I = 5mA CHRG I = 5mA ACPR V – FLOAT RECHRG ORDER PART NUMBER 8 EN LTC4058EDD-4.2 7 ACPR LTC4058XEDD-4 PROG DD PART MARKING LAEV LBDH MIN TYP MAX UNITS 4.25 6 200 500 4.158 4.2 4 ...
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... BAT pin (approximately 100mA). Note 5: For all Li-Ion applications, the BSENSE pin must be electrically connected to the BAT pin. Note 6: This parameter is not applicable to the LTC4058X. Note 7: I TERM with indicated PROG resistor. ...
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... LTC4058-4.2/LTC4058X-4 TYPICAL PERFOR A CE CHARACTERISTICS Regulated Output (Float) Voltage vs Charge Current 4. 4. 1.25k PROG 4.22 4.20 4.18 4.16 4.14 4.12 4.10 0 100 200 300 400 500 600 700 I (mA) BAT 405842 G04 CHRG Pin I-V Curve (Pull-Down State – ...
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... BAT (Pin 2): Charge Current Output. Provides charge current to the battery from the internal P-channel MOSFET. CHRG (Pin 3): Charge Status Open-Drain Output. When the battery is charging, the CHRG pin is pulled low by an LTC4058-4.2/LTC4058X-4.2 Charge Current vs Ambient Temperature 600 ONSET OF THERMAL REGULATION ...
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... EN (Pin 8): Enable Input . A logic high on the EN pin will put the LTC4058 into shutdown mode where the battery drain current is reduced to less than 2 A and the supply current is reduced to less than logic low or floating the EN pin (allowing an internal 2M pull-down resistor to pull this pin low) enables charging ...
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... LTC4058 charge cycle. Once the charge cycle has terminated or the LTC4058 is disabled, the pin state becomes high impedance. 1 Any external sources that hold the PROG pin above 100mV will prevent the LTC4058 from terminating a charge cycle. 1 for longer than TERM ...
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... V voltage. 2.9V < BSENSE < 4.1V Manual Shutdown At any point in the charge cycle, the LTC4058 can be put into shutdown mode by driving the EN pin high. This reduces the battery drain current to less than 2 A and the supply current to less than 50 A. When in shutdown mode, the CHRG pin is in the high impedance state ...
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... Example: An LTC4058 operating from a 5V supply is programmed to supply 800mA full-scale current to a discharged Li-Ion battery with a voltage of 3.3V. Assuming is 50 C/W (see Thermal Considerations), the ambient JA temperature at which the LTC4058 will begin to reduce the charge current is approximately 120 C – (5V – 3.3V) • (800mA) • 120 C – ...
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... LTC4058-4.2/LTC4058X-4 APPLICATIO S I FOR ATIO The LTC4058 can be used above 52 C ambient but the charge current will be reduced from 800mA. The approxi- mate current at a given ambient temperature can be approximated by: 120 C T – BAT V – V • CC BAT JA Using the previous example with an ambient temperature ...
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... DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED DRAIN-BULK DIODE OF FET LTC4058 405842 F04 R = 0.115 ...
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... Port, Keeps Current Drawn from USB Port Constant, Keeps Battery Fresh, Use with the LTC4053, LTC1733, or LTC4054 Automatic Switching Between DC Sources, Load Sharing, Replaces ORing Diodes www.linear.com 6 500mA BAT 1 BSENSE 4.7 F LTC4058-4.2 + 1-CELL 8 5 Li-Ion EN PROG BATTERY GND 405842 TA04 Li-Ion ...