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参数资料
| 型号： | LTC4010EFE |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.2 A BATTERY CHARGE CONTROLLER, 640 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件页数： | 23/24页 |
| 文件大小： | 281K |
| 代理商： | LTC4010EFE |
LTC4010
4010fb
pin FuncTions
GND (Pin 4): Ground. This pin provides a single-point
ground for internal references and other critical analog
circuits.
VTEMP (Pin 5): Battery Temperature Input. An external 10k
NTC thermistor may be connected between VTEMP and
GND to provide temperature-based charge qualification
and additional fast charge termination control. Charging
may also be paused by connecting the VTEMP pin to GND.
Refer to the Operation and Applications Information sec-
tions for complete details on external thermistor networks
and charge control. If this pin is not used it should be
wired to GND through 10k. Operating voltage range is
GND to 3.3V.
VCELL(Pin6):AverageSingle-CellVoltageInput.Anexternal
voltage divider between BAT and VCDIV is attached to this
pin to monitor the average single-cell voltage of the bat-
tery pack. The LTC4010 uses this information to protect
against catastrophic battery overvoltage and to control
the charging state. Refer to the Applications Information
section for further details on the external divider network.
Operating voltage range is GND to BAT.
VCDIV(Pin7):AverageCellVoltageResistorDividerTermi-
nation.TheLTC4010connectsthispintoGNDprovidedthe
charger is not in shutdown. VCDIV is an open-drain output
to GND with an operating voltage range of GND to BAT.
TIMER (Pin 8): Charge Timer Input. A resistor connected
between TIMER and GND programs charge cycle timing
limits. Refer to the Applications Information section for
complete details. Operating voltage range is GND to 1V.
SENSE (Pin 9): Charge Current Sense Input. An external
resistor between this input and BAT is used to program
charge current. Refer to the Applications Information
section for complete details on programming charge
current. Operating voltage ranges from (BAT – 50mV) to
(BAT + 200mV).
BAT (Pin 10): Battery Pack Connection. The LTC4010 uses
the voltage on this pin to control current sourced from
VCC to the battery during charging. Allowable operating
voltage range is GND to VCC.
INTVDD (Pin 11): Internal 5V Regulator Output. This pin
provides a means of bypassing the internal 5V regulator
used to power the BGATE output driver. Typically, power
should not be drawn from this pin by the application
circuit. Refer to the Application Information section for
additional details.
BGATE(Pin12):ExternalSynchronousN-channelMOSFET
Gate Control Output. This output provides gate drive to
an optional external NMOS power transistor switch used
for synchronous rectification to increase efficiency in the
step-down DC/DC converter. Operating voltage is GND to
INTVDD. BGATE should be left floating if not used.
PGND (Pin 13): Power Ground. This pin provides a return
for switching currents generated by internal LTC4010 cir-
cuits. Externally, PGND and GND should be wired together
using a very low impedance connection. Refer to PCB
Layout Considerations in the Applications Information
section for additional grounding details.
TGATE (Pin 14): External P-channel MOSFET Gate Control
Output.ThisoutputprovidesgatedrivetoanexternalPMOS
power transistor switch used in the DC/DC converter. Op-
erating voltage range varies as a function of VCC. Refer to
the Electrical Characteristics table for specific voltages.
VCC (Pin 15): Power Input. External diodes normally
connect either the DC input power supply or the battery
to this pin. Refer to the Applications Information section
for further details. Suggested applied voltage range is
GND to 34V.
READY (Pin 16): Active-Low Ready-to-Charge Output.
The LTC4010 connects this pin to GND if proper operating
voltages for charging are present. Refer to the Operation
section for complete details on charge qualification. This
output is capable of driving an LED and should be left
floating if not used. READY is an open-drain output to
GND with an operating voltage range of GND to VCC.
ExposedPad(Pin17):Thispinprovidesenhancedthermal
properties for the TSSOP. It must be soldered to the PCB
copper ground to obtain optimum thermal performance.
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