Circuit Power Supply
Circuit Power Supply,Regulator Supply, Switching Regulator, DC to AC Inverter, DC to DC Converter
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- Current-Limit Switch Is Digitally Programmable by MAX5160
Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no higher. This application note illustrates the implementation of a digitally programmable current-limit switch using MAX890L a current-limited, high-side P-channel [...]
Sun, 06 Jan 2008 15:57:18 +0000 - Voltage reference sets current limit
The current-limit circuit in Figure 1 allows you to establish the setpoint by applying a voltage to one of the amplifier’s pins. With this design, it is possible to set the current-limit point with the output of a DAC, possibly under the control of an embedded µC. The OPA547 is a true op amp; thus, [...]
Sun, 06 Jan 2008 15:50:41 +0000 - dc/dc converter’s current-limit
The circuit in Figure 1 shows how a thermistor applies temperature compensation to the circuit’s output-current limit. The MAX1714’s linear current-limit (ILIM) input range at Pin 6 of IC1 spans 0.5 to 2V, which corresponds to current-limit thresholds of 50 to 200 mV, respectively. Source: http://www.edn.com/article/CA6262538.html
Sun, 06 Jan 2008 15:47:56 +0000 - Circuit adds latch-off current limit to regulator
The circuit is based on IC1, an LTC1430 PWM controller. The current-limiting feature of the IC operates by sensing the voltage across the high-side MOSFET and compares it with a threshold voltage developed across R3. Source: http://www.edn.com/article/CA46728.html
Fri, 21 Dec 2007 15:02:49 +0000 - Circuit provides hiccup-current limiting
The three major types of current-limit-protection mechanisms are constant, foldback, and hiccup. Hiccup current limit performs the best of the three types; however, the implementation is rather complex. In this scheme, upon detection of an overcurrent event, the whole power supply shuts down for an interval before it tries to power itself up again. The [...]
Fri, 21 Dec 2007 15:01:32 +0000 - Comparator adds current limit
Although this short-circuit protection is often sufficient, some applications require a true current limit, such as the implementation in Figure 1’s circuit. A low-value resistor, R1, performs current sensing. The circuit applies the voltage across this resistor, through R2 and R3, to the inputs of the comparator IC2A. R4 and R8 create initial offset voltages [...]
Fri, 21 Dec 2007 15:00:38 +0000 - Circuit adds latch-off current limit to regulator
The circuit is based on IC1, an LTC1430 PWM controller. The current-limiting feature of the IC operates by sensing the voltage across the high-side MOSFET and compares it with a threshold voltage developed across R3. Read Source:http://www.edn.com/article/CA46728.html
Thu, 20 Dec 2007 15:21:30 +0000 - Dual Current-Limiting Switch for USB
The circuit in Figure 1 uses the MIC2545A-2 and the MIC2778. The MIC2545A-2 is a programmable current limit high-side switch that is capable of having current-limit up to 2.5A. Read Source:http://www.micrel.com/_PDF/App-Notes/an-32.pdf
Thu, 20 Dec 2007 15:20:08 +0000 - Add trimmable current limit to dc/dc supply
You can add a simple, two-transistor circuit to a standard, step-down dc/dc converter to provide an adjustable limit for the output current (Figure 1). You can apply this method to most step-down converters that provide access to the feedback node. Read Source : http://www.edn.com/archives/1997/080197/16di_03.htm
Thu, 20 Dec 2007 15:19:00 +0000 - Current limiter provides latch-up signal
The comparator circuit in Figure 1 provides detection of a pending latch-up condition. The comparator senses whether the load voltage sinks below a given threshold. The comparator can then generate an interrupt to a supervising controller. You can use the circuit to effect board-level latch-up detection and power cycling. Source : http://www.edn.com/archives/1998/010198/01di_08.htm
Wed, 19 Dec 2007 04:59:02 +0000
