UC3854

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 6

www.unisonic.com.tw

QW-R103-082.a



ELECTRICAL CHARACTERISTICS (Cont.)

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Oscillator

Initial Accuracy

85

100

115

kHz

Voltage Stability

1

%

Total Variation

Line, Temp

80

120

kHz

Ramp Amplitude (p-p)

4.9

5.9

V

Ramp Valley Voltage

0.8

1.3

V

Enable/Softstart /Current Limit

Enable Threshold

2.35

2.55

2.8

V

Enable Hysteresis

500

600

mV

Enable Input Bias Current

-2

-5

uA

Propagation Delay to Disable

Enable Overdrive= -100mV (Note 1)

300

ns

SS Charge Current

10

14

24

PKLMT Offset Voltage

-15

15

mV

PKLMT Input Current

-200

-100

uA

PKLMT Propagation Delay

(Note 1)

150

ns

Multiplier

-220

-200

-170

uA

Output Current - Zero

-2.0

-0.2

2.0

uA

Output Current - Power Limited

-230

-200

-170

uA

-22

uA

-156

uA

-2

uA

Output Current

-14

uA

Gain Constant

K

-1.1

-1.0

-0.9

A/A

Gate Driver

Output High Voltage

12

12.8

v

1

2.2

V

300

500

mV

Output Low Voltage Output

Low (UVLO)

0.9

1.5

V

Output Rise / Fall Time

35

ns

Output Peak Current

1.0

A

Notes: 1. Guaranteed by design, not 100% tested in production

2. Gain constant (K)=

MO

2

RMS

AC

I

*

V

1.5V)

*(Va

I

