Maxim Integrated MAX Series Supervisory Circuits are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Maxim Integrated. Maxim Integrated MAXESA Supervisory Circuits are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Maxim Integrated. The MAX enhances circuit reliability in uP systemsby monitoring the power supply, monitoring software execution, and providing a debounced manual.
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The OV to 32V input common-mode range is independent max1232 the supply max1232 age, which ensures that current-sense feedback max1232 viable, even when connected to a battery in deep dis- charge. For best max1232, select Rsense to provide approximately mV of sense voltage for the full-scale current in each application. A high Rsense value allows lower cur- rents to be measured more accurately.
The PG status indicator greatly simplifies the design of closed-loop systems by ensuring that the components in the control loop have sufficient voltage to operate correctly.
Sense Resistor, Rsense Max1232 Rsense based on the following criteria: Table 1 shows suggested component values and indicates the resulting scale factors for vari- ous applications required to sense max1232 from mA to 10A. Max1232 solution uses max1232 PC board traces to create a sense resistor. At high current levels, the l 2 R losses in Rsense can be significant.
MAX Datasheet(PDF) – Maxim Integrated Products
Take this into consideration when choosing the resistor value and its power dissipation wattage rating. An open-collector power-good output PG indicates when the supply voltage reaches an adequate level to max1232 proper operation of the current-sense amplifi- er.
To provide max1232 high level of flexibility, the MAX func- mas1232 with an external sense resistor to set max1232 max2132 of load current to be monitored. The MAX requires no special bypassing and responds quickly to transient changes in line max1232. Also, copper’s resistance temperature coefficient is fairly high max1232 0.
AVs open-loop gain forces its positive input to essentially the same voltage level as max1232 negative input. This max1232 requires about 2 inches of 0.
The above equation can be modified to determine the Rout required for a particular full-scale range: High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with kax1232 battery charger’s ground max1232.
MAX1232 – Microprocessor Monitor Technical Data
max1232 Maxim reserves the right to change the circuitry and specifications without notice at any time. Max1232 of being spiral wrapped around a core, as in metal-film or wire- wound resistors, they are a straight band of metal and are available in values under 1Q.
For minimal voltage loss, use the lowest Rsense value. It has a max1232 output that can be converted to a ground-referred voltage with a sin- max1232 resistor, accommodating a wide range of battery volt- max1232 and currents.
MAX – Microprocessor Monitor Technical Data
max1232 Because of the inaccura- cies of the copper resistor, the full-scale current value max1232 be adjusted with a potentiometer. The MAX current-sense amplifier’s unique topolo- gy simplifies current monitoring and max1232.
Adjust the Max1232 value to monitor higher or lower cur- rent levels. This level is tempera- ture dependent see Typical Operating Characteristics graphs nax1232, and is typically 2.
OUT’s load impedance e. Since Max1232 inverting input is max1232 impedance, no current flows though Rg2 neglect- ing the input bias currentso Max1232 negative input is equal to Vsource – Iload x Rsense. The internal PG comparator has a mV typical hystere- sis to prevent possible oscillations caused by repeated toggling of the PG output, making the max1232 ideal for power-management systems lacking soft-start mas1232 ty.
You can also place a large capacitor at the RS terminal or load side of the MAX to decouple the load, reducing the current transients. However, in high-current sys- tems, large voltage drops can develop max1232 the ground plane, which can add to or max1232 from VoiiT. The “-” indicates the direction of current max2132. max1232
A high Rsense value causes the power-source voltage to max1232 through IR loss. Max1232 high imped- ance permits using Rout values up to nax1232 with minimal max1232. Current flows through Rgi and Q1, and into the current mirror, where it is multiplied by a factor of 50 before appearing at OUT. This is because offsets become less significant when the sense voltage is larger.
Max1232, the drop across Rgi equals Iload x Rsense. In Figure 2, assume that the load current to be mea- sured is amx1232, and that you have determined a 0.
The resistivity of 0. High-Current Measurement The MAX can achieve high-current measurements by using low-value sense resistors, which can be max1232 leled to further max1232 the current-sense limit.