LTC4063 LINER [Linear Technology], LTC4063 Datasheet
LTC4063
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LTC4063 Summary of contents
Page 1
... The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. Charge termination methods include minimum charge current or maximum time. With power applied, the LTC4063 can be put into shutdown mode to reduce the supply current to 35µA and the battery drain current to less than 2µA. ...
Page 2
... BAT CHGEN Rising, 4.3V < V < Hysteresis V from High to Low TIMER Hysteresis V from Low to High TIMER Hysteresis U W INFORMATION ORDER PART TOP VIEW NUMBER LTC4063EDD 9 PROG 11 8 IDET 7 TIMER 6 CHRG DD PART MARKING DD PACKAGE LBHX = 40°C/W (NOTE 3) JA MIN TYP MAX ● 4.3 8 ● ...
Page 3
... Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC4063EDD is guaranteed to meet performance specifica- tions from 0°C to 70°C. Specifications over the – 40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls ...
Page 4
... LTC4063 TYPICAL PERFORMANCE CHARACTERISTICS Regulated Output (Float) Voltage vs Charge Current 4. 1.25k PROG 4.24 4.22 4.20 4.18 4.16 4.14 4.12 4.10 0 100 200 300 400 500 600 700 800 CHARGE CURRENT (mA) 4063 G01 Charge Current vs PROG Pin Voltage 900 1.25k 800 PROG TIMER 700 600 ...
Page 5
... A 800 T = 90°C A 799 T = –40° 115°C A 798 797 100 120 I (mA) OUT 4063 G17 LTC4063 Recharge Threshold Voltage vs Temperature 4.16 4.14 4. 4. 4.08 4.06 4.04 – 100 –25 TEMPERATURE (°C) 4063 G12 CHGEN Pin Threshold Voltage ...
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... LTC4063 TYPICAL PERFORMANCE CHARACTERISTICS LDO Regulator Dropout Voltage vs Temperature 200 OUT I = 100mA OUT 150 100 50 0 –50 – 100 TEMPERATURE (°C) 4063 G19 LDO Regulator Dropout Voltage vs Load Current 180 OUT 150 T = 115°C A 120 T = 90°C ...
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... This pin should be bypassed with a 1µF capacitor. Exposed Pad (Pin 11): Ground. This pin is the back of the Exposed Pad package and must be soldered to the PCB , to ground TIMER copper for minimal thermal resistance LTC4063 selects User set by con- DETECT , to ground set by the DET DETECT ...
Page 8
... LTC4063 W BLOCK DIAGRA – TO BAT C1 + 4.1V CHRG 6 STOP RECHRG LDOEN LDOEN 4 2MΩ LOGIC CHGEN CHGEN TERM 5 2MΩ SEL C2 + – COUNTER 0.1V OSCILLATOR TIMER 7 C TIMER 1× 1× – – 0. 3µA C3 – + 2.9V TO BAT IDET PROG DET PROG 1000× ...
Page 9
... BAT. If the BAT pin is below the recharge threshold of 4.1V (which corresponds to approximately 80% to 90% battery capacity), the LTC4063 enters charge mode and begins a full charge cycle. If the BAT pin is above 4.1V, the LTC4063 enters standby mode and does not begin charging. This feature reduces the number of unnecessary charge cycles, prolonging battery life ...
Page 10
... LTC4063 from excessive temperature and allows the user to push the limits of the power handling capability of a given circuit board without risk of damaging the LTC4063. The charge current can be set according to typical (not worst-case) ambient temperatures with the assurance that the charger will automatically reduce the current in worst-case conditions ...
Page 11
... The output voltage can be set U U APPLICATIO S I FOR ATIO Programming Charge Termination The LTC4063 terminates a charge cycle using several methods, allowing the designer considerable flexibility in choosing an ideal charge termination algorithm. Table 1 shows a brief description of the different termination methods and their behavior. ...
Page 12
... C 4063 F02 charges the battery until the internal timer reaches 1.5 hours. Figure 3 describes the operation of the LTC4063 charger when Charge Time Termination is used. FAULT MODE NO CHARGE CURRENT CHRG STATE: SQUARE WAVE ...
Page 13
... I terminates the charge cycle. The CHRG output is in its pull-down state when charging and in its high impedance state once charging has stopped. Figure 4 describes the operation of the LTC4063 charger when charge current termination is used. V User-Selectable Charge Termination ...
Page 14
... Figure 5. State Diagram of a Charger Cycle Using User Termination With User-Selectable Charge Termination, the SmartStart feature is disabled; when the charger is powered on or enabled, the LTC4063 automatically begins charging, re- gardless of the battery voltage. Figure 5 describes charger operation when User-Selectable Charge Termination is used. ...
Page 15
... Example: An LTC4063 operating from a 5V wall adapter is programmed to supply 800mA full-scale current to a discharged Li-Ion battery with a voltage of 3.3V. Assuming θ is 40°C/W (see Thermal Considerations), the ambient JA temperature at which the LTC4063 will begin to reduce the charge current is approximately 105°C – (5V – 3.3V) • (800mA) • 40°C ...
Page 16
... LTC4063 package is properly soldered to the PC board ground. Correctly soldered to a 2500mm double sided 1oz copper board, the LTC4063 has a ther- mal resistance of approximately 40°C/W. Failure to make thermal contact between the exposed pad on the backside of the package and the copper board will result in thermal resistances far greater than 40° ...
Page 17
... U APPLICATIO S I FOR ATIO USB and Wall Adapter Power The LTC4063 allows charging from both a wall adapter and a USB port. Figure 9 shows how to combine wall adapter and USB power inputs. A P-channel MOSFET, MP1, is used to prevent back conducting into the USB port ...
Page 18
... CHRG BAT LTC4063 2 7 TIMER OUT 9 PROG 340k 1.25k 8 3 IDET FB GND 0.1µF 625Ω 160k BAT CC + LTC4063 1µ TIMER PROG 8 IDET GND 800mA V OUT 2.5V + SINGLE CELL Li-Ion BATTERY 2.2µF 4063 TA02 Li-Ion CELL 2.5k 100mA/ 500mA 10k µ ...
Page 19
... ALL DIMENSIONS ARE IN MILLIMETERS 4. 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 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC4063 R = 0.115 0.38 ± 0.10 TYP 6 10 ...
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... LTC4063 RELATED PARTS PART NUMBER DESCRIPTION Battery Chargers LTC1733 Monolithic Lithium-Ion Linear Battery Charger LTC1734 Lithium-Ion Linear Battery Charger in ThinSOT LTC1734L Lithium-Ion Linear Battery Charger in ThinSOT LTC4002 Switch Mode Lithium-Ion Battery Charger LTC4050 Lithium-Ion Linear Battery Charger Controller LTC4052 Monolithic Lithium-Ion Battery Pulse Charger ...