MAX1647 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX1647

Chemistry-Independent Battery Chargers

Maxim Integrated 

Chemistry-Independent

Battery Chargers

Table 7. ChargerStatus( ) Bit Descriptions

NAME

CHARGE_INHIBITED

MASTER_MODE

VOLTAGE_NOTREG

CURRENT_NOTREG

LEVEL_2

LEVEL_3

CURRENT_OR

VOLTAGE_OR

THERMISTOR_OR

THERMISTOR_COLD

BIT

POSITION

0

1

2

3

4

5

6

7

8

9

LATCHED?

DESCRIPTION

Yes

0 = Ready to charge a smart battery

1 = Charger is off; IOUT current = 0mA; DLO = PGND; DHI = LX

N/A

Always returns ‘0’

No

0 = BATT voltage is limited at the voltage set point (BATT = V0).

1 = BATT voltage is less than the voltage set point (BATT < V0).

No

0 = Current through R1 is at its limit (IBATT = I0).

1 = Current through R1 is less than its limit (IBATT < I0).

N/A

Always returns 1

N/A

Always returns 0

No

0 = ChargingCurrent( ) value is valid for MAX1647.

1 = ChargingCurrent( ) value exceeds what MAX1647 can actually deliver.

No

0 = ChargingVoltage( ) value is valid for MAX1647.

1 = ChargingVoltage( ) value exceeds what MAX1647 can actually deliver.

No

0 = THM voltage < 91% of REF voltage

1 = THM voltage > 91% of REF voltage

No

0 = THM voltage < 75% of REF voltage

1 = THM voltage > 75% of REF voltage

THERMISTOR_HOT

10

This bit reports the state of an internal SR flip-flop (denoted THERMISTOR_HOT

Yes

flip-flop). The THERMISTOR_HOT flip-flop is set whenever THM is below 23%

of REF. It is cleared whenever BATTERY_PRESENT = 0 or ChargerMode( ) is

written with POR_RESET = 1.

THERMISTOR_UR

11

No

0 = THM voltage > 5% of REF voltage

1 = THM voltage < 5% of REF voltage

ALARM_INHIBITED

12

This bit reports the state of an internal SR flip-flop (denoted ALARM_INHIBITED

flip-flop). The ALARM_INHIBITED flip-flop is set whenever the AlarmWarning( )

Yes

command is written with D15, D14, or D12 set. The ALARM_INHIBITED flip-flop

is cleared whenever BATTERY_PRESENT = 0 or ChargerMode( ) is written with

POR_RESET = 1.

POWER_FAIL

13

BATTERY_PRESENT

14

AC_PRESENT

15

No

0 = BATT voltage < 89% of DCIN voltage

1 = BATT voltage > 89% of DCIN voltage

No

0 = No battery is present (THERMISTOR_OR = 1).

1 = A battery is present (THERMISTOR_OR = 0).

No

0 = VL voltage < 4V

1 = VL voltage > 4V

*Bit position in the D15-D0 data

N/A = Not applicable

___________________Chip Information

TRANSISTOR COUNT: 3612

SUBSTRATE CONNECTED TO AGND

______________________________________________________________________________________ 23

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