L4960 DATASHEET PDF

Malalkree Specification ll in this publication are subject to change without notice. The output stage is thus re-enabled and the output voltage rises under control of the soft start network. Product Stock Price Buy L 82 1 3. The load current is sensed by an internal metal.

Author:Kejas Nalmaran
Country:Bosnia & Herzegovina
Language:English (Spanish)
Genre:Medical
Published (Last):19 May 2007
Pages:404
PDF File Size:11.86 Mb
ePub File Size:16.26 Mb
ISBN:395-5-86922-529-2
Downloads:93626
Price:Free* [*Free Regsitration Required]
Uploader:Zulkikazahn



The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the output stage. An errorsignal is produced by comparing the output voltage with a precise 5.

This error signalis thencompared with thesawtooth signal to generate the fixed frequency pulse width modulated pulses which drive the output stage. The gain and frequency stability of the loop can be adjusted by an external RC network connected to pin 3.

Closing the loop directly gives an output voltage of 5. Higher voltages are obtained by inserting a voltage divider. Output overcurrents at switch on are prevented by the soft start function.

The error amplifier output is initially clamped by the external capacitor Css and allowed to rise, linearly, as this capacitor is charged by a constant current source. Output overload pro- tection is provided in the form of a current limiter. The load current is sensed by an internal metal resistor connected to a comparator.

When the load current exceeds a preset threshold this comparator sets a flip flop which disables the output stage and discharges the soft start capacitor. A second com- parator resets the flip flop when the voltage across the soft start capacitor has fallen to 0. The output stage is thus re-enabled and the output voltage rises under control of the soft start network.

If the overload condition is still present the limiter will trigger again when the threshold current is reached. The average short circuit current is limited to a safe value by the dead time introduced by the soft start network.

Figure 1. Soft start waveforms Figure 2.

BEGINNING RUBY ON RAILS STEVEN HOLZNER PDF

L4960 DATASHEET PDF

The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the output stage. An errorsignal is produced by comparing the output voltage with a precise 5. This error signalis thencompared with thesawtooth signal to generate the fixed frequency pulse width modulated pulses which drive the output stage. The gain and frequency stability of the loop can be adjusted by an external RC network connected to pin 3. Closing the loop directly gives an output voltage of 5.

CANON I-SENSYS MF6550 PDF

Product Stock Price Buy L 0 1. A second com- parator resets the flip flop when the voltage across the soft start capacitor has fallen to 0. L Information furnished is believed to be accurate and reliable. PDF L Datasheet download This error signalis thencompared with thesawtooth signal to generate the fixed frequency pulse width modulated pulses which drive the output stage. Chip One Stop 2.

ATRAPA EL PEZ DORADO DAVID LYNCH PDF

.

BARRY JOHN RAYBOULD PDF

.

Related Articles