MAX17035(2009) 查看數據表（PDF） - Maxim Integrated
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MAX17035 Datasheet PDF : 27 Pages
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High-Frequency,
Low-Cost SMBus Chargers
A
B
C
D
EF
G
tLOW tHIGH
SMBCLK
H
I
J
K
SMBDATA
tSU:STA tHD:STA
tSU:DAT
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
tHD:DAT
E = SLAVE PULLS SMBDATA LINE LOW
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
tSU:DAT
tSU:STO tBUF
I = ACKNOWLEDGE CLOCK PULSE
J = STOP CONDITION
K = NEW START CONDITION
Figure 5. SMBus Read Timing
Battery Charger Commands
The MAX17035/MAX17435/MAX17535 support four
battery-charger commands that use either write-word
or read-word protocols as summarized in Table 3.
ManufacturerID() and DeviceID() can be used to identify
the MAX17035/MAX17435/MAX17535. On the MAX17035/
MAX17435/MAX17535 ManufacturerID() always returns
0x004D and DeviceID() always returns 0x0008.
Setting Charge Voltage
To set the output voltage, use the SMBus to write a
16-bit ChargeVoltage() command using the data format
listed in Table 4. The ChargeVoltage() command uses
the write-word protocol (see Figure 3). The command
code for ChargeVoltage() is 0x15 (0b00010101). The
MAX17035/MAX17435/MAX17535 provide a charge-
voltage range of 4.095V to 19.200V, with 16mV resolution.
Set ChargeVoltage() below 4.095V to terminate charging.
Upon reset, the ChargeVoltage() and ChargeCurrent()
values are cleared and the charger remains off until both
the ChargeVoltage() and the ChargeCurrent() command
are sent. Both DHI and DLO remain low until the charger
is restarted.
Setting Charge Current
To set the charge current, use the SMBus to write a
16-bit ChargeCurrent() command using the data format
listed in Table 5. The ChargeCurrent() command uses the
write-word protocol (see Figure 3). The command code for
ChargeCurrent() is 0x14 (0b00010100). When RS2 = 10mI,
the MAX17035/MAX17435/MAX17535 provide a charge-
current range of 128mA to 11.004A, with 128mA resolution.
If a sense resistor other than 10mI is used, the current
limit must be scaled by RS/10mI, where RS is the sense
resistor value used on the circuit. Set ChargeCurrent() to
0 to terminate charging. Upon reset, the ChargeVoltage()
and ChargeCurrent() values are cleared and the charger
remains off until both the ChargeVoltage() and the
ChargeCurrent() command are sent. Both DHI and DLO
remain low until the charger is restarted.
The MAX17035/MAX17435/MAX17535 include a fault
limiter for low-battery conditions. If the battery voltage
is less than 3V, the charge current is temporarily set to
128mA. The ChargeCurrent() register is preserved and
becomes active again when the battery voltage is higher
than 3V. This function effectively provides a foldback
current limit that protects the charger during short circuit
and overload.
Table 3. Battery Charger Command Summary
COMMAND
0x14
0x15
0x3D
0x3E
0x3F
0xFE
0xFF
COMMAND NAME
ChargeCurrent()
ChargeVoltage()
Relearn Voltage
IINPVoltage()
InputCurrent()
ManufacturerID()
DeviceID()
READ/WRITE
Write only
Write only
Read and write
Read only
Write only
Read only
Read only
DESCRIPTION
6-bit charge-current setting
11-bit charge-voltage setting
11-bit relearn voltage set and 1 bit enable/status
Digital read of IINP voltage
6-bit charge-current setting
Manufacturer ID
Device ID
POR STATE
0x0000
0x0000
0x4B00
NA
0x0080
0x004D
0x0008
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