LTC4059 LINER [Linear Technology], LTC4059 Datasheet
LTC4059
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LTC4059 Summary of contents
Page 1
... A. With power applied, they can be put into shutdown mode, reducing the supply current The LTC4059A features an open-drain status pin to indi- cate the presence of an input voltage. The LTC4059 can be used as a constant-current source to charge Nickel cells. Other features include undervoltage lockout protection and a current monitor pin which can indicate when to terminate a charge cycle ...
Page 2
... V and BAT) CC Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC4059E/LTC4059AE are guaranteed to meet performance specifications from Specifications over the – PACKAGE/ORDER I FOR ATIO TOP VIEW ...
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... 2mA BAT 4. 2.43k PROG 4.22 4.21 4.20 4.19 4.18 4.17 4.16 – – 100 TEMPERATURE ( C) 4059 G02 Charge Current vs Battery Voltage 600 LTC4059 ONLY 500 400 LTC4059A 300 200 100 2.43k PROG 0 2.5 3 3.5 4 4.5 V (V) BAT 4059 G05 PROG Pin Voltage vs Temperature (Constant Current Mode) 1 ...
Page 4
... V (V) EN Manual Shutdown Supply Current vs Temperature –50 – TEMPERATURE ( C) ACPR Pin (Pull-Down State) I-V Curve (LTC4059A Only) 4 4.2V BAT 3 3.0 2.5 2.0 1.5 1.0 0 (V) ACPR UVLO Battery Drain Current vs Battery Voltage 2 ...
Page 5
... EN (Pin 6): Enable Input Pin. Pulling this pin above the manual shutdown threshold (V the LTC4059 in shutdown mode, thus terminating a charge cycle. In shutdown mode, the LTC4059 has less than 25 A supply current and less than 1 A battery drain current. Enable is the default state, but the pin should be tied to GND if unused ...
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... – REF D3 – PROG Figure 1 (LTC4059 – – REF D3 – PROG 5 Figure 2 (LTC4059A) M1 1000 D2 BAT – REF R2 GND 1,7 4059 F01 M1 1000 D2 BAT – REF R2 GND 1,7 4059 F02 4059fa ...
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... No blocking diode or external sense resistor is required; thus, the basic charger circuit requires only two external components. The ACPR pin (LTC4059A) monitors the status of the input voltage with an open-drain output. The Li CC pin (LTC4059) disables constant-voltage operation and turns the LTC4059 into a precision current source capable of charging Nickel chem- istry batteries ...
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... Constant Temperature The LTC4059/LTC4059A use a unique architecture to charge a battery in a constant-current, constant-voltage and constant-temperature fashion. Figures 1 and 2 show simplified block diagrams of the LTC4059 and LTC4059A respectively. Three of the amplifier feedback loops shown control the constant-current, CA, constant-voltage, VA, and constant-temperature, TA modes. A fourth amplifier ...
Page 9
... C – (5V – 3.7V) • (900mA) • 115 C – 1.17W • 50 C/W = 115 C – The LTC4059 can be used above 56 C, but the charge current will be reduced from 900mA. The approximate current at a given ambient temperature can be calculated: 115 C T – ...
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... Because of the self-resonant and high Q characteristics of some types of ceramic capaci- tors, high voltage transients can be generated under some start-up conditions, such as connecting the charger input to a live power source. For more information, refer to Application Note 88. LTC4059 20k CHARGE CURRENT PROG MONTIOR CIRCUITRY GND ...
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... U DC Package 6-Lead Plastic DFN (2mm 2mm) (Reference LTC DWG # 05-08-1703) 0.675 0.05 PACKAGE PIN 1 OUTLINE TOP MARK (SEE NOTE 5) 0.25 0.05 0.200 REF 0.50 BSC LTC4059/LTC4059A R = 0.115 0.38 0.05 TYP 4 6 0.56 0.05 (2 SIDES) 2.00 0.10 (4 SIDES 0.50 BSC 0.75 0.05 1 ...
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... ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 V IN 4.5V TO 6.5V 600mA V BAT CC LTC4059 + EN PROG GND 2k 4059 TA03 COMMENTS Standalone Charger with Programmable Timer 1.5A Charge Current TM Simple ThinSOT Charger, No Blocking Diode, No Sense Resistor Needed 1% Accurate 2 ...