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参数资料
| 型号： | MAX17535ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/28页 |
| 文件大小： | 0K |
| 描述： | IC SMBUS BATT CHARGER 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（锂离子），多化学 |
| 电源电压： | 8 V ~ 26 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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High-Frequency,
Low-Cost SMBus Chargers
A
t LOW
B
t HIGH
C
D
E
F
G
H
I
J
K
SMBCLK
SMBDATA
t SU:STA t HD:STA
t SU:DAT
t HD:DAT
t SU:DAT
t SU:STO
t BUF
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
Figure 5. SMBus Read Timing
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
I = ACKNOWLEDGE CLOCK PULSE
J = STOP CONDITION
K = NEW START CONDITION
Battery Charger Commands
The 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
MAX17435/MAX17535. On the 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 and read-word protocols (see Figure
3). The command code for ChargeVoltage() is 0x15
(0b00010101). The 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.
Table 3. Battery Charger Command Summary
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
and read-word protocols (see Figure 3). The command
code for ChargeCurrent() is 0x14 (0b00010100). When
RS2 = 10m I , the MAX17435/MAX17535 provide a charge-
current range of 128mA to 8.064A, with 128mA resolution.
If a sense resistor other than 10m I is used, the current
limit must be scaled by RS/10m I , 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 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.
COMMAND
0x14
0x15
0x3D
0x3E
0x3F
0xFE
0xFF
COMMAND NAME
ChargeCurrent()
ChargeVoltage()
Relearn Voltage
IINPVoltage()
InputCurrent()
ManufacturerID()
DeviceID()
READ/WRITE
Read and write
Read and write
Read and write
Read only
Read and write
Read only
Read only
DESCRIPTION
6-bit charge-current setting, readback
(3’b0, 6’bx, 7’b0)
11-bit charge-voltage setting, readback
(1’b0, 11’bx, 4’b0)
11-bit relearn voltage set and 1-bit enable/status
Digital readback of IINP voltage
6-bit input-current setting readback
(3’b0, 6’bx, 7’b0)
Manufacturer ID
Device ID
POR STATE
0x0000
0x0000
0x4B00
NA
0x1000
0x004D
0x0008
Note: ‘x’ means the data is sent to the analog block.
18
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