ADP5360ACBZ-2-R7 datasheet(23/60 Pages) AD

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Data Sheet

ADP5360

Rev. 0 | Page 23 of 60

BATTERY TEMPERATURE

Battery Pack Thermistor Input

The ADP5360 charger features battery pack temperature

sensing that precludes charging when the battery pack

temperature is outside of the specified range. The THR pin

provides three programmable current sources: 60 μA, 12 μA,

and 6 μA. Accordingly, the THR pin supports 10 kΩ, 47 kΩ, and

100 kΩ NTC resistors at 25°C. The THR pin is connected

directly to the battery pack thermistor terminal.

When the THR function is enabled, the THR node voltage is

sensed by the ADC and can be read in the 12-bit registers,

THR_V_HIGH and THR_V_LOW. Calculate the external

thermistor value (RNTC) by using the following equation:

RNTC = (THR_V/60 µA)

where:

THR_V is the ADC readback from the THR_V_HIGH and

THR_V_LOW registers.

60 μA is selected by the THR pin source current.

To achieve the battery temperature, the RNTC value must be

known.

When VVBUS is higher than VVBUS_OK_RISE, the THR function is

forced to enable for the charger control requirement. The update

rate is 1 second. When VVBUS is lower than VVBUS_OK_RISE, set the

EN_THR bit (Address 0x0A) high to enable the THR function. To

save quiescent current the THR node voltage update rate slows

to 30 seconds.

If the battery pack thermistor is not connected directly to the

THR pin, a 100 kΩ (tolerance ±20%) dummy resistor must be

connected between the THR pin and the AGND1 and AGND2

pins. Leaving the THR pin open results in a false detection of a

<0°C battery temperature, and charging disables.

The ADP5360 charger monitors the voltage on the THR pin and

suspends charging if the voltage is less than 0°C or higher than

60°C. For temperatures greater than 0°C and lower than 60°C, the

THR_STATUS[2:0] bits,Address 0x09, are set accordingly.

JEITA Li-Ion Battery Temperature Charging Specification

The charge of the ADP5360 is compliant with the JEITA Li-Ion

battery charging temperature specifications as shown in Table 13.

The JEITA function can be enabled via the I2C interface. When

the ADP5360 detects a JEITA cool condition, the charging

current reduces, as shown in Table 14.

When the ADP5360 identifies a hot or cold battery condition,

the battery isolation FET turns off. The VSYS pin is linear regulated

at VSYS_REG and provides power for the system.

Table 13. JEITA Li-Ion Battery Charging Specification Defaults

Parameter

Symbol

Conditions

Min Max Unit

JEITA Cold Temperature Limits

IJEITA_COLD

No battery charging occurs.

°C

JEITACool Temperature Limits

IJEITA_COOL

Battery charging occurs at approximately 50% or 10% of programmed

level. See Table 14 for specific charging current reduction levels.

°C

JEITATypical Temperature Limits

IJEITA_TYP

Normal battery charging occurs at default and programmed levels.

°C

JEITAWarm Temperature Limits

IJEITA_WARM

Battery termination voltage (VTRM) is reduced by 100 mV from

programmed value.

°C

JEITA Hot Temperature Limits

IJEITA_HOT

No battery charging occurs.

°C

Table 14. JEITA Cool Temperature Limit—Reduced Charge Current Levels

ICHG[4:0] Value (mA)

ICHG JEITAValue (mA)

ILIM_JEITA_COOL = 0

ILIM_JEITA_COOL = 1

00000 = 10

00001 = 20

00010 = 30

00011 = 40

00100 = 50

00101 = 60

00110 = 70

00111 = 80

01000 = 90

01001 = 100

01010 = 110

01011 = 120

01100 = 130

ADP5360ACBZ-2-R7 Datasheet(PDF) 23 Page - Analog Devices

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