SC4810EITSTRT datasheet(14/24 Pages) SEMTECH

Part #	SC4810EITSTRT

Description	High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay

PDF	24 Pages

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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14 / 24 page

 2004 Semtech Corp.

www.semtech.com

SC4810A/B/C/D/E

POWER MANAGEMENT

Application Information (Cont.)

GND

VREF

Vout

VBias

SC431

Fig.9 Cycle-by-cycle over-current limitation

)

........(

•

)

........(

REF

•

Synchronization

SC4810 features a special synchronization function

which is leading-edge triggered with a threshold set to

2.1V. Applications like multi-phase interleaving can be

achieved using the SYNC pin. When the SYNC pin is con-

nected to the RCT pin of the master SC4810, the out-

puts of the two SC4810’s will be out of phase. The fre-

quency of the master SC4810 clock signal should be at

least 30% faster than that of the slave SC4810 for the

guaranteed synchronization. SYNC pin should be

grounded if synchronization is unused. (The patent for

the synchronization scheme is pending).

The synchronous function is illustrated as in Fig. 10.

VRCT

Clock Signal of the Master SC4810

2.1V

OUT1 of the Master SC4810

OUT1 of the Slave SC4810

Fig. 10 Illustration for Synchronization

SC4810EITSTRT Datasheet(PDF) 14 Page - Semtech Corporation