UAC33092A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

5 of 5

www.unisonic.com.tw

QW-R121-005.C

ELECTRICAL CHARACTERISTIC(Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

SWITCHING CHARACTERISTICS

Fundamental Regulation Output

Frequency. (Pin 17)

f

Clock oscillator frequency divided by

4096

68

Hz

Suggested Clock Oscillator

Frequency Range, (Pin 9)

205

280

350

kHz

Duty Cycle (Pin 17)

At Start-up

During Overvoltage Condition

StartDC

27

3.5

29

4.7

31

5.5

%

%

Low/High RPM Transition

Frequency (Pin 10)

247

273

309

Hz

LRC Duty Cycle Increase Rate

Low RPM Mode(LRCFreq<247Hz) Pin

11 =Open (Slow Rate)

Low RPM Mode(LRCFreq<247Hz)

Pin 11 =Grounded (Fast Rate)

High R PMMode(LRCFreq>309Hz)

Pin 11 = Don’t Care (LRC Mode is

disabled)

8.5

34

409

9.5

38

455

10.5

42

501

%/sec

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exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

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presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.