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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MAX1232 – Microprocessor Monitor Technical Data
The MAX operates max1232 a 3. Adjust the Rsense value to monitor higher or lower cur- rent levels. OUT’s high imped- ance permits max1232 Rout values up to kQ with minimal error. Wide bandwidth and ground-sensing capability make the MAX max1232 for closed-loop max1232 and general- purpose current-source applications.
A high Rsense value allows lower cur- rents to be measured more accurately. A high Rsense value causes the power-source voltage to degrade ma1x232 Max1232 loss. The MAX current-sense amplifier’s unique topolo- gy simplifies current monitoring and control.
Max1232, in high-current sys- tems, large voltage drops can develop across the ground plane, which can add to or subtract from VoiiT.
An max1232 delay 15us typical in the PG compara- tor max1232 adequate time for power-on transients to settle out. Sense Resistor, Rsense Choose Rsense based on the following criteria: As max1232 alternative, PC board traces max1232 be adjusted over a wide range.
High-Current Measurement The MAX can max1232 high-current measurements by using low-value sense resistors, which can be paral- leled to further increase the current-sense limit.
MAX Datasheet(PDF) – Maxim Integrated Products
Max1232 solution uses the PC board traces to create a sense resistor. Wire-wound resis- tors have the highest inductance, while metal film is somewhat better. You can also place a large capacitor at the RS terminal or load side of the MAX to decouple the load, reducing the current max1232. The above equation can be modified to max1232 the Rout required for a particular full-scale range: The MAX requires no special bypassing and responds max1232 to transient changes in line current.
Also, the sense resistor’s value might drift max1232 it is allowed to heat max1232 excessively. In Figure 2, assume that the load current max1232 be mea- sured is 10A, and that you have determined a 0.
OUT’s load impedance e. Also, copper’s resistance temperature max1232 is fairly high approximately 0. AVs open-loop gain forces its positive input to essentially the same voltage level max1232 the negative input.
The OV max1232 32V input common-mode range is independent of the supply volt- age, which ensures that current-sense feedback remains viable, even when connected to a battery in deep dis- charge. For best performance, select Rsense to provide approximately mV of sense voltage for the full-scale current in each application.
The MAX’s amplifier operates as shown in Figure 1. Select Rsense using the guidelines and for- mulas in the following section. Maxim maax1232 the max1232 to max1232 the circuitry and specifications without notice at any time.
max1232 The “-” indicates the direction of current flow. Take this into consideration when choosing the resistor value and its power max1232 wattage rating.
For minimal voltage loss, use the lowest Rsense value. Use a single-point star max1232 for the highest current- measurement accuracy. To provide a high level of flexibility, the MAX func- tions with max1232 external sense resistor to set the range of load current to be monitored.
No circuit patent licenses are implied. These max1232 are not required for MAX operation or stability. High-side power-line monitoring is especially useful max1232 battery-powered systems, since it does not interfere with the battery charger’s ground path. Table 1 shows suggested component values and indicates max1232 resulting scale factors for vari- ous applications required to sense currents from mA to 10A.
The PG status indicator greatly simplifies the design of closed-loop systems max1232 ensuring that the components in the control loop have sufficient voltage to operate correctly. Because of the inaccura- cies of the copper resistor, the full-scale current max1232 must be adjusted with a potentiometer.
Therefore, the drop across Rgi equals Iload x Rsense. Max1232 of being spiral wrapped around a core, as in metal-film or wire- wound resistors, they max1232 a straight band of metal and are available in values under 1Q.
At high current max1232, the l 2 R losses in Rsense can be significant. An open-collector power-good output PG max1232 when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifi- er.
The internal PG comparator has a mV typical hystere- sis to prevent possible oscillations caused by repeated toggling of max1232 PG output, making the device ideal for max1232 systems lacking max1232 capabili- ty. If the cost of Rsense is an issue, max1232 might want to use an alternative solution, as shown in Figure 2. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Keep inductance low if Isense has max1232 large high-frequency component. Current flows through Rgi and Q1, and into the current mirror, where it is multiplied by a factor of 50 before appearing at OUT.
Search the history of max1232 billion web pages on the Max1232. This is because offsets become less significant when the sense voltage is larger.