LM3524 DATASHEET PDF

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LM Datasheet(PDF) – National Semiconductor (TI)

Regulating Pulse Width Modulator. The LMD family is an improved version of the industry. It has improved specifications and addi.

New features reduce the need for additional exter. V CE breakdown datasheey 60V. The common mode voltage range of. In the LMD the circuit bias line has been isolated from. This prevents the oscillator pulse ampli. In addition, the LMD can now be synchronized exter. Also a latch has been added to insure. LMD includes double pulse suppression logic that in.

This feature prevents the same output from being.

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Typical Performance Characteristics Continued. Current Limit Sense Voltage.

The above shows the relation between V INV o and duty. L1 is in Henrys.

Also, see LM data sheet for graphical methods of induc. From Figure 13 it can be seen that current will be lj3524 into. The current flowing for this time is. For this reason Q1 should be selected to have the maxi. Some minimum load current I oand thus in.

Solving the above for L1. It has improved specifications and addi- tional features yet is pin for pin compatible with existing families.

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New features reduce the need for additional exter- nal circuitry often required in the original version. The cur- rent carrying capability of the output drive transistors has been raised to mA while reducing V CEsat and increasing V CE breakdown to 60V.

The common mode voltage range of the error-amp has been raised to 5. In the LMD the circuit bias line has been isolated from the shut-down pin. This prevents the oscillator pulse ampli- tude and frequency from being disturbed by shut-down. In addition, the LMD can now be synchronized exter- nally, through pin 3. Also a latch has been added to insure datashheet pulse per period even in noisy environments. The LMD includes double pulse suppression logic that in- sures when a shut-down condition is removed the state of the T-flip-flop will change only after the first clock pulse has arrived.

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This feature prevents the same output from being pulsed twice in a row, thus reducing the possibility of core saturation in push-pull designs.

LM35240 DATASHEET

L1 is in Henrys f is switching frequency in Hz Also, see LM data sheet for graphical methods of induc- tor selection. This curent must flow to the load and C o.

For this reason Q1 should be selected to have the maxi- mum possible f Twhich implies very fast rise and fall times. Some minimum datasneet current I oand thus in- ductor current, is required as shown below: