Datasheet LTC4124 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 100mA Wireless Li-Ion Charger with Low Battery Disconnect |
| Pages / Page | 28 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Charge Termination Period and
Text Version of Document
link to page 6 link to page 6 link to page 6 LTC4124
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Charge Termination Period and CHRG Pull-Down Current vs Bad Battery Detection Period vs Temperature Temperature
400 3.8 61 V BAD BA CHRG = 0.4V VCC = 5V 300 3.6 57 360 TTER 3.4 53 340 Y DETECTION PERIOD (MINS) 320 3.2 49 (µA) 300 TION PERIOD (HOURS) 3.0 45 I CHRG 280 2.8 41 260 2.6 37 240 220 2.4 CHARGE TERMINATION PERIOD 33 CHARGE TERMINA BAD BATTERY DETECTION PERIOD 200 2.2 29 –20 –5 10 25 40 55 70 85 –20 –5 10 25 40 55 70 85 TEMPERATURE (°C) TEMPERATURE (°C) 4124 G08 4124 G09
PIN FUNCTIONS VCC (Pin 1):
System DC Supply. The VCC voltage range
PRECHG (Pin 3):
Precharge Enable. Tie this pin to VCC to is 2.7V to 5.5V. An internal diode is connected from the enable low current precharge at battery voltages below ACIN pin (anode) to this pin (cathode), and a second one the precharge battery threshold (VBAT_TRKL). Tie this is connected from the DCIN pin (anode) to this pin (cath- pin to GND to disable low current precharge. When low ode). The voltage on this pin will be determined by the current precharge is disabled, full charge current will be higher of the DCIN voltage and the peak AC voltage on the delivered for battery voltages below the final charge volt- ACIN pin. There is an internal 2.2µF rectification capacitor age. Do not leave this pin open. connected between this pin and GND. Optional additional
VSEL1 (Pin 4):
Charge Voltage Select Bit 1. Tie this pin capacitance can be connected externally between this pin to V and GND. CC or GND to program the battery charge voltage. Do not leave this pin open. Refer to Table 2 for programming
CHRG (Pin 2):
Charge Status Indicator. This pin is an open the desired charge voltage. drain output with a 300µA current source pull down. In
VSEL2 (Pin 5):
Charge Voltage Select Bit 2. Tie this pin a typical application, this pin is pulled up by an LED to to V V CC or GND to program the battery charge voltage. Do CC. This pin has four possible states shown in Table 1. not leave this pin open. Refer to Table 2 for programming
Table 1. CHRG States
the desired charge voltage.
CHRG Status Table 2. Battery Charge Voltage Programming
High Impedance No Input Power
VSEL1 VSEL2 Charge Voltage
Blink Slow Powered On and Charging (0.8Hz) High High 4.35V Blink Fast Charging Paused due to Battery Temperature Out of High Low 4.20V (6Hz) Range, or Low High 4.10V Charging Stopped due to Bad Battery Detected, or Low Low 4.00V Limited Charging due to Undervoltage Current Limit Pull Down End of Charge C/10 Reached or Charging Complete Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Charge Termination Period and CHRG Pull-Down Current vs Bad Battery Detection Period vs Temperature Temperature
400 3.8 61 V BAD BA CHRG = 0.4V VCC = 5V 300 3.6 57 360 TTER 3.4 53 340 Y DETECTION PERIOD (MINS) 320 3.2 49 (µA) 300 TION PERIOD (HOURS) 3.0 45 I CHRG 280 2.8 41 260 2.6 37 240 220 2.4 CHARGE TERMINATION PERIOD 33 CHARGE TERMINA BAD BATTERY DETECTION PERIOD 200 2.2 29 –20 –5 10 25 40 55 70 85 –20 –5 10 25 40 55 70 85 TEMPERATURE (°C) TEMPERATURE (°C) 4124 G08 4124 G09
PIN FUNCTIONS VCC (Pin 1):
System DC Supply. The VCC voltage range
PRECHG (Pin 3):
Precharge Enable. Tie this pin to VCC to is 2.7V to 5.5V. An internal diode is connected from the enable low current precharge at battery voltages below ACIN pin (anode) to this pin (cathode), and a second one the precharge battery threshold (VBAT_TRKL). Tie this is connected from the DCIN pin (anode) to this pin (cath- pin to GND to disable low current precharge. When low ode). The voltage on this pin will be determined by the current precharge is disabled, full charge current will be higher of the DCIN voltage and the peak AC voltage on the delivered for battery voltages below the final charge volt- ACIN pin. There is an internal 2.2µF rectification capacitor age. Do not leave this pin open. connected between this pin and GND. Optional additional
VSEL1 (Pin 4):
Charge Voltage Select Bit 1. Tie this pin capacitance can be connected externally between this pin to V and GND. CC or GND to program the battery charge voltage. Do not leave this pin open. Refer to Table 2 for programming
CHRG (Pin 2):
Charge Status Indicator. This pin is an open the desired charge voltage. drain output with a 300µA current source pull down. In
VSEL2 (Pin 5):
Charge Voltage Select Bit 2. Tie this pin a typical application, this pin is pulled up by an LED to to V V CC or GND to program the battery charge voltage. Do CC. This pin has four possible states shown in Table 1. not leave this pin open. Refer to Table 2 for programming
Table 1. CHRG States
the desired charge voltage.
CHRG Status Table 2. Battery Charge Voltage Programming
High Impedance No Input Power
VSEL1 VSEL2 Charge Voltage
Blink Slow Powered On and Charging (0.8Hz) High High 4.35V Blink Fast Charging Paused due to Battery Temperature Out of High Low 4.20V (6Hz) Range, or Low High 4.10V Charging Stopped due to Bad Battery Detected, or Low Low 4.00V Limited Charging due to Undervoltage Current Limit Pull Down End of Charge C/10 Reached or Charging Complete Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
