MAX1535A Datasheet, PDF (21/39 Pages) Maxim Integrated Products – Highly Integrated Level 2 SMBus Battery Charger

Highly Integrated Level 2 SMBus
Battery Charger
Table 4. ChargerMode()
BIT
BIT NAME
DESCRIPTION
0* = Allow normal operation; clear the CHG_INHIBITED flip-flop.
0
INHIBIT_CHARGE
1 = Turn off the charger; set the CHG_INHIBITED flip-flop.
The CHG_INHIBITED flip-flop is not affected by any other commands.
1
ENABLE_POLLING
Not implemented
0* = No change.
2
POR_RESET
1 = Change the ChargeVoltage() to 0x4B00 and the ChargeCurrent() to 0x0080;
clear the THERMISTOR_HOT and ALARM_INHIBITED flip-flops.
0* = No change.
3
RESET_TO_ZERO
1 = Set the ChargeCurrent() and ChargeVoltage() to zero even if the
INHIBITED_CHARGE bit is zero.
4
AC_PRESENT_MASK
0* = Interrupt on either edge of the AC_PRESENT status bit.
1 = Do not interrupt because of an AC_PRESENT bit change.
5
BATTERY_PRESENT_MASK
0* = Interrupt on either edge of the BATTERY_PRESENT status bit.
1 = Do not interrupt because of a BATTERY_PRESENT bit change.
6
POWER_FAIL_MASK
0* = Interrupt on either edge of the POWER_FAIL status bit.
1 = Do not interrupt because of a POWER_FAIL bit change.
7
—
Not implemented
0* = When DCIN > BATT + 100mV, PDS pulls low and PDL pulls high.
0 = When DCIN < BATT + 100mV, PDS pulls high and PDL pulls low.
8
CALIBRATION_ENABLE
1 = When THM < 91% and DCIN > BATT + 100mV, PDS pulls high and PDL
pulls low.
1 = When THM > 91% and DCIN > BATT + 100mV, PDS pulls high and PDL
pulls low.
9
—
Not implemented
0 = The THERMISTOR_HOT status bit does not turn off the charger.
10
HOT_STOP
1* = The THERMISTOR_HOT status bit does turn off the charger.
THERMISTOR_HOT is reset by either POR_RESET or BATTERY_PRESENT = 0.
11
—
12
—
13
—
14
—
15
—
Command: 0x12
* Indicates POR state.
Not implemented
Not implemented
Not implemented
Not implemented
Not implemented
result in a current setting of 256mA. A 10mΩ current-
sense resistor (R1 in Figure 1) is required to achieve
the correct code/current scaling.
The default input current-limit setting at POR is 256mA.
Thus, the first time a MAX1535A powers up, the input
current is limited to 256mA. Anytime the battery is
removed, the InputCurrent() register returns to its POR
state.
Interrupts and Alert Response Address
The MAX1535A requests an interrupt by pulling the
INT pin low. An interrupt is normally requested when
there is a change in the state of the ChargerStatus()
bits POWER_FAIL (bit 13), BATTERY_PRESENT
(bit 14), or AC_PRESENT (bit 15). Therefore, the INT
pin pulls low whenever the AC adapter is connected
or disconnected, the battery is inserted or removed,
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