Datasheet LTC4010 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | High Efficiency Standalone Nickel Battery Charger |
| Pages / Page | 24 / 8 — GND (Pin 4):. INTVDD (Pin 11):. TEMP (Pin 5):. BGATE (Pin 12):. PGND (Pin … |
| File Format / Size | PDF / 292 Kb |
| Document Language | English |
GND (Pin 4):. INTVDD (Pin 11):. TEMP (Pin 5):. BGATE (Pin 12):. PGND (Pin 13):. VCELL (Pin 6):. TGATE (Pin 14):. VCDIV (Pin 7):
Model Line for this Datasheet
Text Version of Document
LTC4010 pin FuncTions
GND (Pin 4):
Ground. This pin provides a single-point
INTVDD (Pin 11):
Internal 5V Regulator Output. This pin ground for internal references and other critical analog provides a means of bypassing the internal 5V regulator circuits. used to power the BGATE output driver. Typically, power
V
should not be drawn from this pin by the application
TEMP (Pin 5):
Battery Temperature Input. An external 10k NTC thermistor may be connected between V circuit. Refer to the Application Information section for TEMP and GND to provide temperature-based charge qualification additional details. and additional fast charge termination control. Charging
BGATE (Pin 12):
External Synchronous N-channel MOSFET may also be paused by connecting the VTEMP pin to GND. Gate Control Output. This output provides gate drive to Refer to the Operation and Applications Information sec- an optional external NMOS power transistor switch used tions for complete details on external thermistor networks for synchronous rectification to increase efficiency in the and charge control. If this pin is not used it should be step-down DC/DC converter. Operating voltage is GND to wired to GND through 10k. Operating voltage range is INTVDD. BGATE should be left floating if not used. GND to 3.3V.
PGND (Pin 13):
Power Ground. This pin provides a return
VCELL (Pin 6):
Average Single-Cel Voltage Input. An external for switching currents generated by internal LTC4010 cir- voltage divider between BAT and VCDIV is attached to this cuits. Externally, PGND and GND should be wired together pin to monitor the average single-cell voltage of the bat- using a very low impedance connection. Refer to PCB tery pack. The LTC4010 uses this information to protect Layout Considerations in the Applications Information against catastrophic battery overvoltage and to control section for additional grounding details. the charging state. Refer to the Applications Information
TGATE (Pin 14):
External P-channel MOSFET Gate Control section for further details on the external divider network. Output. This output provides gate drive to an external PMOS Operating voltage range is GND to BAT. power transistor switch used in the DC/DC converter. Op-
VCDIV (Pin 7):
Average Cell Voltage Resistor Divider Termi- erating voltage range varies as a function of VCC. Refer to nation. The LTC4010 connects this pin to GND provided the the Electrical Characteristics table for specific voltages. charger is not in shutdown. VCDIV is an open-drain output
V
to GND with an operating voltage range of GND to BAT.
CC (Pin 15):
Power Input. External diodes normally connect either the DC input power supply or the battery
TIMER (Pin 8):
Charge Timer Input. A resistor connected to this pin. Refer to the Applications Information section between TIMER and GND programs charge cycle timing for further details. Suggested applied voltage range is limits. Refer to the Applications Information section for GND to 34V. complete details. Operating voltage range is GND to 1V.
READY (Pin 16):
Active-Low Ready-to-Charge Output.
SENSE (Pin 9):
Charge Current Sense Input. An external The LTC4010 connects this pin to GND if proper operating resistor between this input and BAT is used to program voltages for charging are present. Refer to the Operation charge current. Refer to the Applications Information section for complete details on charge qualification. This section for complete details on programming charge output is capable of driving an LED and should be left current. Operating voltage ranges from (BAT – 50mV) to floating if not used. READY is an open-drain output to (BAT + 200mV). GND with an operating voltage range of GND to VCC.
BAT (Pin 10):
Battery Pack Connection. The LTC4010 uses
Exposed Pad (Pin 17):
This pin provides enhanced thermal the voltage on this pin to control current sourced from properties for the TSSOP. It must be soldered to the PCB VCC to the battery during charging. Allowable operating copper ground to obtain optimum thermal performance. voltage range is GND to VCC. 4010fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts
GND (Pin 4):
Ground. This pin provides a single-point
INTVDD (Pin 11):
Internal 5V Regulator Output. This pin ground for internal references and other critical analog provides a means of bypassing the internal 5V regulator circuits. used to power the BGATE output driver. Typically, power
V
should not be drawn from this pin by the application
TEMP (Pin 5):
Battery Temperature Input. An external 10k NTC thermistor may be connected between V circuit. Refer to the Application Information section for TEMP and GND to provide temperature-based charge qualification additional details. and additional fast charge termination control. Charging
BGATE (Pin 12):
External Synchronous N-channel MOSFET may also be paused by connecting the VTEMP pin to GND. Gate Control Output. This output provides gate drive to Refer to the Operation and Applications Information sec- an optional external NMOS power transistor switch used tions for complete details on external thermistor networks for synchronous rectification to increase efficiency in the and charge control. If this pin is not used it should be step-down DC/DC converter. Operating voltage is GND to wired to GND through 10k. Operating voltage range is INTVDD. BGATE should be left floating if not used. GND to 3.3V.
PGND (Pin 13):
Power Ground. This pin provides a return
VCELL (Pin 6):
Average Single-Cel Voltage Input. An external for switching currents generated by internal LTC4010 cir- voltage divider between BAT and VCDIV is attached to this cuits. Externally, PGND and GND should be wired together pin to monitor the average single-cell voltage of the bat- using a very low impedance connection. Refer to PCB tery pack. The LTC4010 uses this information to protect Layout Considerations in the Applications Information against catastrophic battery overvoltage and to control section for additional grounding details. the charging state. Refer to the Applications Information
TGATE (Pin 14):
External P-channel MOSFET Gate Control section for further details on the external divider network. Output. This output provides gate drive to an external PMOS Operating voltage range is GND to BAT. power transistor switch used in the DC/DC converter. Op-
VCDIV (Pin 7):
Average Cell Voltage Resistor Divider Termi- erating voltage range varies as a function of VCC. Refer to nation. The LTC4010 connects this pin to GND provided the the Electrical Characteristics table for specific voltages. charger is not in shutdown. VCDIV is an open-drain output
V
to GND with an operating voltage range of GND to BAT.
CC (Pin 15):
Power Input. External diodes normally connect either the DC input power supply or the battery
TIMER (Pin 8):
Charge Timer Input. A resistor connected to this pin. Refer to the Applications Information section between TIMER and GND programs charge cycle timing for further details. Suggested applied voltage range is limits. Refer to the Applications Information section for GND to 34V. complete details. Operating voltage range is GND to 1V.
READY (Pin 16):
Active-Low Ready-to-Charge Output.
SENSE (Pin 9):
Charge Current Sense Input. An external The LTC4010 connects this pin to GND if proper operating resistor between this input and BAT is used to program voltages for charging are present. Refer to the Operation charge current. Refer to the Applications Information section for complete details on charge qualification. This section for complete details on programming charge output is capable of driving an LED and should be left current. Operating voltage ranges from (BAT – 50mV) to floating if not used. READY is an open-drain output to (BAT + 200mV). GND with an operating voltage range of GND to VCC.
BAT (Pin 10):
Battery Pack Connection. The LTC4010 uses
Exposed Pad (Pin 17):
This pin provides enhanced thermal the voltage on this pin to control current sourced from properties for the TSSOP. It must be soldered to the PCB VCC to the battery during charging. Allowable operating copper ground to obtain optimum thermal performance. voltage range is GND to VCC. 4010fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts
