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参数资料
| 型号： | MAX17535ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/28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
Pin Description (continued)
PIN
16
17
18
19
20
21
22
23
24
—
NAME
CSSP
CC
IINP
ACIN
ITHR
V AA
V CC
GND
EN
EP
FUNCTION
Current Sense for Positive Input. Connect a current-sense resistor from CSSP to CSSN. The voltage
across CSSP to CSSN determines the current at which the charger reduces charging current to
keep from drawing more current from the adapter than is allowed. As the system current flowing in
the resistor from CSSN to CSSP increases, the charger reduces charge current to keep the system
current at the limit value. When the system current reaches 130% of InputCurrent() setting for more
than 16ms, the PDSL pin turns off the adapter selector FET to prevent excess current from being
drawn from the adapter. The adaptor selector FET is re-enabled after 0.6s. If the fault continues, the
cycle is repeated three times after which the MAX17435/MAX17535 is latched off. To reset the latch,
remove and reinsert the adapter.
Voltage Regulation Loop-Compensation Point. Connect a 10nF capacitor from CC to GND.
Input Current-Monitor Output. The voltage at the IINP pin is 20 times the voltage from CSSP to
CSSN. This voltage is present when charging is enabled to monitor the system current, and when
the battery is discharging to monitor the battery discharge current.
AC Adapter-Detect Input. ACIN is the input to a comparator with a 1.485V (typ) reference voltage.
The output of the comparator is ACOK . ACOK goes low when the threshold voltage is exceeded,
indicating that the AC adapter is present, and it enables the charger. When the ACIN input is above
2.0V, the MAX17435/MAX17535 interpret that as an adapter overvoltage event. The charger is then
disabled and the adapter MOSFETs are turned off. If the part is charging and the ACIN voltage
drops below the programmed threshold, the charger is disabled, and a ChargeCurrent() and
ChargeVoltage() command have to be written over the SMBus to re-enable the charger.
Adaptive System Current-Limit Comparator Threshold. This pin connects to the inverting input of a
comparator. The noninverting input of the comparator is the IINP input, while the output is driving
the ADAPTLIM open drain. When the input to ITHR is greater than IINP, the ADAPTLIM output is
high.
4.096V Internal Reference Voltage; No External Load Allowed. Bypass to analog ground using a 1 F F
or greater ceramic capacitor. V AA is active only after LDO and the internal reference are active.
Circuitry Supply-Voltage Input. Connect to LDO through 10 I and bypass with a 0.1 F F capacitor to
GND as close as possible to the package pin.
Analog Ground
Enable/Disable Charger Operation. This disables the charger and associated circuitry when EN
goes low and is in addition to the ACOK charger enable. If the adapter is absent and EN is pulled
up to a voltage higher than 2.4V, LDO, V AA , the input charge current, and the battery discharge
current monitor on IINP are enabled.
Exposed Pad. Connect backside EP to power ground.
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