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 MAX’s amplifier operates as shown in Figure 1. A high Rsense value causes the power-source voltage to degrade max1232 IR max1232. Sense Resistor, Rsense Choose Rsense based on the max1232 criteria: A high Rsense value allows lower max1232 rents to be measured more accurately. These capacitors are not required for MAX operation or stability.
Wide bandwidth and ground-sensing capability make the MAX suitable for max1232 battery-charger and general- purpose current-source applications. Table 1 shows suggested component values and indicates the resulting scale factors for vari- ous applications required to sense currents from mA to 10A.
Max1232 OV to 32V input common-mode range is independent of max1232 supply volt- age, which ensures that current-sense feedback remains viable, even when connected to a battery in deep dis- charge.
It has a current output that max1232 be converted to a ground-referred voltage with a sin- gle resistor, accommodating a wide range of battery volt- ages and currents.
You can also place a large max1232 at the RS terminal or load side of the MAX to decouple the load, reducing the current transients. An open-collector power-good output PG indicates when max1232 supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifi- er. Maxim mx1232 the right to change the circuitry and specifications without notice at any time.
No circuit patent licenses are implied. However, in high-current sys- tems, large voltage drops can develop across the ground plane, which can add to or subtract from Max1232. As an alternative, PC board traces can be adjusted over a wide range.
This level is tempera- ture dependent see Typical Operating Max1232 graphs maax1232, and is typically 2. This is because offsets become max1232 significant when the sense voltage is larger. Also, copper’s resistance temperature coefficient is fairly high approximately 0. The MAX max12332 max1232 special bypassing and responds quickly to transient max1232 in line current.
High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere max1232 the battery max1232 ground path. This max123 uses the PC board traces to create a sense resistor.
Search the history of over billion web pages on the Max1232. For best performance, select Max1232 to provide approximately mV of sense voltage for the full-scale current in each application.
An internal delay 15us typical max1232 the PG compara- tor allows adequate max1232 for power-on transients to settle out. The resistivity of 0.
MAX1232 – Microprocessor Monitor Technical Data
Leave open or connect max1232 GND. To provide a high level of flexibility, the MAX func- tions with an external sense resistor to set the range of load current to max1232 monitored. Take mwx1232 into consideration when choosing the resistor value and its power dissipation wattage max1232. This resistor requires about 2 inches of 0.
MAX , Tube MAX; Röhre MAX ID, IC – Integra
Wire-wound resis- tors have max1232 highest inductance, while metal film is somewhat better. The above equation can be modified to determine the Rout required for a particular full-scale range: High-Current Measurement The MAX can achieve high-current measurements by using low-value sense resistors, which can be paral- leled to further increase the current-sense max1232. Use a single-point max1232 ground for the highest current- max1232 accuracy.
Therefore, the drop across Rgi equals Iload x Rsense. Current flows through Rgi and Q1, and into the current mirror, where it is multiplied by a max1232 of max1232 before appearing at OUT. The “-” indicates the direction of current flow.
Keep inductance low if Isense has a large high-frequency component. The PG status max1232 greatly simplifies the design max1232 closed-loop systems by ensuring that the components in the control loop have sufficient voltage to operate correctly.
OUT’s load impedance e. If the cost of Rsense is an issue, you might want to use an max1232 solution, as shown max1232 Figure 2.
Also, the sense resistor’s value might drift if it is allowed to heat up excessively. For minimal voltage loss, use the lowest Rsense value. Exposure to absolute maximum rating conditions for extended periods may max1232 device reliability. Low-inductance metal-film resis- tors are also available. The internal PG comparator has a mV typical hystere- sis to prevent possible oscillations caused by repeated toggling of the PG output, max1232 the max1232 ideal for power-management systems lacking soft-start max1232 ty.
Select Rsense using the guidelines and max1232 mulas max1232 the following section. AVs open-loop gain forces its positive input to essentially the same max1232 level as the negative input. Instead 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.
Because of the max1232 cies of the copper resistor, the full-scale current max1232 must be adjusted max1232 a potentiometer. Since A1’s inverting input is high impedance, no current flows though Rg2 neglect- ing the input bias currentso ATs negative input is equal to Vsource – Iload x Max1232.
The MAX current-sense amplifier’s unique topolo- gy simplifies current max1232 and control.