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MAX34460ETM+ PDF预览

MAX34460ETM+

更新时间: 2024-01-24 18:47:58
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
65页 1774K
描述
Power Supply Management Circuit, PQCC48,

MAX34460ETM+ 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active包装说明:QCCN, LCC48,.24SQ,16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:12 weeks
风险等级:2.22模拟集成电路 - 其他类型:POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 代码:S-PQCC-N48湿度敏感等级:1
端子数量:48最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:QCCN封装等效代码:LCC48,.24SQ,16
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):NOT SPECIFIED电源:3.3 V
认证状态:Not Qualified子类别:Power Management Circuits
标称供电电压 (Vsup):3.3 V表面贴装:YES
温度等级:INDUSTRIAL端子形式:NO LEAD
端子节距:0.4 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIEDBase Number Matches:1

MAX34460ETM+ 数据手册

 浏览型号MAX34460ETM+的Datasheet PDF文件第59页浏览型号MAX34460ETM+的Datasheet PDF文件第60页浏览型号MAX34460ETM+的Datasheet PDF文件第61页浏览型号MAX34460ETM+的Datasheet PDF文件第63页浏览型号MAX34460ETM+的Datasheet PDF文件第64页浏览型号MAX34460ETM+的Datasheet PDF文件第65页 
MAX34460  
PMBus 12-Channel Voltage Monitor and Sequencer  
output is available to be configured as a GPO. Also, for  
these channels, POWER_GOOD_ON should be set to  
0000h to force power-good assertion since this channel  
is not measuring voltage (Figure 10). The current-sense  
amplifier must have a source impedance of less than the  
value as constrained by the selection of the ADC_TIME  
bits in MFR_MODE and the output from the amplifier must  
not exceed the maximum input-voltage limits of the device.  
The 100Iseries resistor is required to protect the device if  
the current-sense amplifier can be active when the system  
manager is powered off.  
Configuration Port  
Some applications require the ability to configure the  
device when it has been mounted on a PCB. In such  
applications, a 3- or 4-wire header can be added to allow  
2
access to the slave I C pins.  
Resistor-Dividers and Source  
Impedance for RSn Inputs  
The maximum full-scale voltage on the ADC inputs is  
2.048V (nom). A resistor-divider must be used to measure  
voltages greater than 1.8V. The maximum source imped-  
ance to the RSn inputs is determined by the ADC_TIME  
bits in MFR_MODE. See the Recommended Operating  
Conditions table for more information.  
The VOUT_SCALE_MONITOR command can be used to  
properly scale the external sense element and current-  
sense amplifier gain so that the READ_VOUT command  
reports current instead of voltage. Normally VOUT_SCALE_  
MONITOR scales voltage from 0 to 32.767V in 1mV steps.  
For channels used to measure current instead of voltage,  
the VOUT_SCALE_MONITOR command can be configured  
to report current from 0A to 32.767A in 1mA steps by using  
the following formula. Table 41 provides some examples.  
Note that VOUT_SCALE_MONITOR cannot exceed a ratio  
of 1. System designs should avoid RG combinations with a  
value greater than 1.  
Protecting Input Pins  
In applications where voltages can be applied to the RSn  
pins when V  
is grounded, a series 100Iresistor is rec-  
DD  
ommended on these pins to protect the device by limiting  
power dissipation. In applications where voltage can be  
applied to any other pin when V  
resistor of 100Ior greater is recommended on these pins  
is grounded, a series  
DD  
to protect the device by limiting power dissipation.  
Current Measurement on RSn Inputs  
The RSn inputs normally measure voltages, but with the  
addition of an external current-sense amplifier the device  
can also be configured to measure current. Any of the RSn  
inputs can be configured to measure current. On chan-  
nels that measure current, the sequencing for that channel  
should be disabled by setting TON_MAX_FAULT_LIMIT =  
8000h to FFFFh. On these channels, the associated PSENn  
VOUT_SCALE_MONITOR = R x G x 32,767  
Exposed Pad Grounding  
The device uses the exposed pad of the TQFN package  
as the common ground (V ) for the entire device. The  
SS  
exposed pad must be connected to the local ground plane.  
3V MAXIMUM OUTPUT VOLTAGE  
1kI MAXIMUM OUTPUT IMPEDANCE  
CURRENT-  
SENSE  
AMPLIFIER  
GAIN (G)  
100I  
SENSE  
ELEMENT  
(R)  
CURRENT  
MAX34460  
RSn  
VOUT_SCALE_MONITOR = R x G x 32,767  
TON_MAX_FAULT_LIMIT = 8000h TO FFFFh  
POWER_GOOD_ON = 0000h  
MAX4376 (SINGLE)  
MAX4377 (DUAL)  
MAX4378 (QUAD)  
Figure 10. Current-Measuring Circuit  
Table 41. Scale Current-Gain Example  
VOUT_SCALE_MONITOR VALUE  
R
G
V/A RATIO  
SENSE ELEMENT (mI)  
AMPLIFIER GAIN (V/V)  
R x G (I)  
Dec  
3276  
6553  
3276  
2621  
1638  
Hex  
0CCC  
1999  
0CCC  
0A3D  
0666  
1
2
100  
100  
50  
0.1  
0.2  
2
0.1  
4
20  
0.08  
0.05  
0.5  
100  
Maxim Integrated  
62  
 
 
 

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