LTC4060 Linear Integrated, LTC4060 Datasheet
LTC4060
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LTC4060 Summary of contents
Page 1
... LTC4060 into sleep mode. During shutdown or sleep mode, battery drain is <1µA. The LTC4060 is available in both low profile (0.75mm) 16- pin 5mm × 3mm DFN and 16-lead TSSOP packages. Both feature exposed metal die mount pads for optimum ther- mal performance ...
Page 2
... 5.6V CC BAT SEL0 = 0, SEL1 = 0 and SEL0 = V SEL1 = 0, V Increasing CC SEL0 = 0, SEL1 = 0 and SEL0 = V SEL1 = 0, V Decreasing CC ORDER PART TOP VIEW NUMBER 16 GND 15 CHRG LTC4060EFE ACP 17 12 CHEM 11 NTC 10 SEL1 FE PART MARKING 9 SEL0 FE PACKAGE 4060EFE = 125°C, θ = 37°C 135° ...
Page 3
... CELL ARCT 4.5V < V < 10V CC V Decreasing CELL ARCT CC 4.5V < V < 10V CC Increasing CELL V = 1.3V ARCT V Decreasing, 4.5V < V < 10V NTC CC V Increasing NTC V Decreasing, 4.5V < V < 10V NTC CC LTC4060 MIN TYP MAX UNITS ● 6.67 6.81 6.95 ● 6.57 6.71 6.85 ● 8.28 8.47 8.65 ● 8.18 8.37 8.55 100 mV ● 1.9 2 2.1 ● 0.35 0.4 0.45 320 400 480 ...
Page 4
... Operating the device beyond these limits may result in permanent damage. Continuous or extended application of these maximum levels may adversely affect device reliability. Note 2: The LTC4060 is guaranteed to meet performance specifications from 0°C to 70°C ambient temperature range and 0°C to 85°C junction temperature range. Specifications over the –40°C to 85°C operating ambient temperature range are assured by design, characterization and correlation with statistical process controls ...
Page 5
... NiMH 4.5V ≤ V ≤ 10V –50 – 100 125 TEMPERATURE (°C) 4060 G08 LTC4060 NiMH Battery Charging Characteristics at C/2 Rate 1. 25°C A –∆V TERMINATION 1.55 1.50 1.45 1.40 1. 100 120 140 CHARGE TIME (MINUTES) 4060 G03 ...
Page 6
... CC ground with a capacitance of 1µF. CHRG (Pin 15): Open-Drain Charge Indicator Status Out- put. The LTC4060 indicates it is providing charge to the battery by driving this pin to GND. If charging is paused or suspended due to abnormal battery temperature, the pin remains pulled to GND. Otherwise the pin is high imped- ance ...
Page 7
... SUPPLY GOOD COLD OUTPUT DRIVER HOT CURRENT LIMIT CUTOFF OVERTEMPERATURE I I/5 DETECT CHARGER STATE CONTROL LOGIC I OSC AUTORECHARGE OSCILLATOR DETECTOR CHEM SEL1 SEL0 TIMER TIMER LTC4060 SEL0 UVLO SEL1 SENSE 3 DRIVE AND 1 BAT A/D CONVERTER BATTERY DETECTOR I BRD ARCT 4060 BD 4060f 7 ...
Page 8
... LTC4060 U OPERATIO The LTC4060 is a complete linear fast charging system for NiMH or NiCd batteries. Operation can be understood by referring to the Block Diagram, State Diagram (Figure 1) and application circuit (Figure 2). While in the unpowered sleep mode, the battery is disconnected from any internal loading. The sleep mode is exited and the shutdown mode ...
Page 9
... SHDN pin. In manual shutdown, charging is inhibited, the internal timer is reset and oscillator disabled, CHRG status output is high impedance and ACP continues to provide the correct status. The LTC4060 will draw low cur- rent from the supply (I current is applied to the battery (I LTC4060 is removed or manual shutdown is by the charger ...
Page 10
... OPERATIO applied to the SHDN pin, shutdown ends and charge quali- fication is entered. Charge Qualification After exiting the sleep or shutdown modes the LTC4060 will check for the presence of a battery and for proper battery temperature (if a thermistor is used) before initiat- ing charging. ...
Page 11
... For pause periods or a series of periods where the battery capacity could be significantly depleted, consider using shutdown instead of pause to avoid having the safety timer expire before the battery can be fully charged. Shutdown resets the safety timer. LTC4060 CELL ). The programmable PROG ) ARDT CC ) ...
Page 12
... When this voltage rises above 2.05V (V ) for a time greater than the battery removal event BR delay shown in Table 1, the LTC4060 considers the battery to be absent. Inserting a battery, causing V below both V the battery insertion event delay shown in Table 1, results in the LTC4060 recognizing a battery present and initiates a completely new charge cycle beginning with charge ...
Page 13
... This may be compensated by adjustment of R PROG pin current must be limited to 2.3mA otherwise absolute maximum ratings will be exceeded. When the LTC4060 is in the shutdown mode, the PROG pin is forced to ground potential to save power. Programming the Timer All LTC4060 internal timing is derived from the internal oscillator that is programmed with an external capacitor at the TIMER pin ...
Page 14
... PNP pass transistor to avoid excessive temperature errors on the sensed battery temperature. Furthermore, since V a high current path into the LTC4060 essential to minimize voltage drops between the V the top Kelvin connecting R ...
Page 15
... Exposed Pad and other heat sinking means, especially the amount of copper on the PCB to which the LTC4060 is attached. The majority of the power dissipated within the LTC4060 is in the current sense resitor and DRIVE pin by 1% ...
Page 16
... F02 16 Figure 2. Full Featured 2A Charger Application 10k SHDN ACP ACP 15 3 CHRG SENSE 11 1 NTC DRIVE FZT948 LTC4060 7 2 PROG BAT + 2-CELL 8 4 ARCT TIMER NiMH 9 12 BATTERY SEL0 CHEM TIMER SEL1 PAUSE 820pF GND ...
Page 17
... Figure 5. Bond wire, lead frame and PCB interconnect resistance and mismatches in the two sense resistor’s value will cause charge current variability to increase in proportion to the extension in current. Resistor R should be connected directly to the LTC4060 to reduce ) as part of its BRD errors. The total current sense resistor, bond wire and lead frame resistance is approximately 0.08Ω ...
Page 18
... In some applications protection from reverse supply volt- age is desired. If the supply voltage is high enough, a series blocking diode can be used. In other cases, where the voltage drop must be kept very low, a P-channel FET as shown in Figure 6 can be used LTC4060 4060 F06 *DRAIN BULK DIODE OF MOSFET Figure 6 ...
Page 19
... Plastic DFN (5mm × 3mm) (Reference LTC DWG # 05-08-1706) 0.65 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 4.40 ±0.05 (2 SIDES) 5.00 ±0.10 (2 SIDES 0.20 TYP 3.00 ±0.10 1.65 ± 0.10 (2 SIDES) (2 SIDES) 0.75 ±0.05 0.00 – 0.05 LTC4060 R = 0.115 0.40 ± 0.10 TYP 9 16 PIN 1 NOTCH (DHC16) DFN 1103 8 1 0.25 ± 0.05 0.50 BSC 4.40 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD 4060f 19 ...
Page 20
... LTC4060 PACKAGE DESCRIPTIO 6.60 ±0.10 4.50 ±0.10 RECOMMENDED SOLDER PAD LAYOUT 0.09 – 0.20 (.0035 – .0079) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE RELATED PARTS PART NUMBER DESCRIPTION LTC1732 Lithium-Ion Linear Battery Charger Controller LTC1733 Monolithic Lithium-Ion Linear Battery Charger LTC1734 ...