Features • Fully interchangeable with standard LM3524 family • ±1% precision 5V reference with thermal shut-down • Output current to 200 mA DC • 60V output capability • Wide common mode input range for error-amp • One pulse per period (noise suppression) • Improved max. duty cycle at high frequencies • Double pulse suppression • Synchronize through pin 3 Description The LM3524D family is an improved version of the industry standard LM3524. It has improved specifications and additional features yet is pin for pin compatible with existing 3524 families. New features reduce the need for additional external circuitry often required in the original version. The LM3524D has a ±1% precision 5V reference. The current carrying capability of the output drive transistors has been raised to 200 mA while reducing VCEsat and increasing VCE breakdown to 60V. The common mode voltage range of the error-amp has been raised to 5.5V to eliminate the need for a resistive divider from the 5V reference. In the LM3524D the circuit bias line has been isolated from the shut-down pin. This prevents the oscillator pulse amplitude and frequency from being disturbed by shut-down. Also at high frequencies (≃300 kHz) the max. duty cycle per output has been improved to 44% compared to 35% max. duty cycle in other 3524s. In addition, the LM3524D can now be synchronized externally, through pin 3. Also a latch has been added to insure one pulse per period even in noisy environments. The LM3524D includes double pulse suppression logic that insures when a shut-down condition is removed the state of the T-flip-flop will change only after the first clock pulse has arrived. This feature prevents the same output from being pulsed twice in a row, thus reducing the possibility of core saturation in push-pull designs.

MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LM2524D/LM3524D Regulating Pulse Width Modulator	1078 Kbytes	2-May-08	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語

More Application Notes

Title		Size	Date	Other Language
	AN-292: Application Note 292 Applications of the LM3524 Pulse-Width-Modulator	239 Kbytes	3-Oct-02
	AN-715: Application Note 715 LM385 Feedback Provides Regulator Isolation	50 Kbytes	3-Oct-02
	AN-288: Application Note 288 System-Oriented DC-DC Conversion Techniques	405 Kbytes	3-Oct-02
	AN-293: Application Note 293 Control Applications of CMOS DACs	385 Kbytes	4-Oct-04
	AN-272: Application Note 272 Op Amp Booster Designs	382 Kbytes	2-Oct-02