UC3854

Advance

CMOS IC

UNISONIC TECHNOLOGIES CO., LTD

4 of 6

www.unisonic.com.tw

QW-R103-082.b



ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

VCC

22

V

GT Drv Current

Continuous

IOUT

0.5

A

50% Duty Cycle

1.5

A

Input Voltage

VSENSE, VRMS

VIN

11

V

ISENSE, Mult Out

11

V

PKLMT

5

V

RSET, IAC PKLMT, ENA

10

mA

Power Dissipation

PD

1

W

Storage Temperature

TSTG

-65 ~ +150

°C

Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2. All voltages with respect to Gnd (Pin 1)

3. All currents are positive into the specified terminal



ELECTRICAL CHARACTERISTICS

Unless otherwise stated, VCC=18V, RT=8.2k, CT=1.5nF, PKLMT=1V, VRMS=1.5V, IAC=100uA, I=0V, CA Out=3.5V, VA

Out=5V, VSENSE=3V, 0°C <TA<70°C, TA=TJ.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overall

Supply Current, Off

ICC(On)

CAO, VAO = 0V, VCC= UVLO - 0.3V

250

400

uA

Supply Current, On

ICC(Off)

12

18

mA

VCC Turn-On Threshold

VCC(On)

UC3854A

16

17.5

V

UC3854B

10.5

11.2

V

VCC Turn-OFF Threshold

VCC(Off)

UC3854A/B

9

10

V

VCC Clamp

VCC(Clamp) I(VCC) = ICC(on) + 5mA

18

20

22

V

Voltage Amplifier

Input Voltage

VSENSE

2.9

3.0

3.1

V

VSENSE Bias Current

IVSENSE

-500

-25

500

nA

Open Loop Gain

AVA

VOUT= 2 ~ 5V

70

100

dB

VOUT High

VHV

ILOAD= -500uA

6

V

VOUT Low

VLV

ILOAD= 500uA

0.3

0.5

V

Output Short Circuit Current

ISCV

VOUT= 0V

1.5

3.5

mA

Gain Bandwidth Product

GBV

Fin = 100kHz, 10mV p-p, (Note 1)

1

mHz

Current amplifier

Input Offset Voltage

IOFFC

VCM= 0V

TA=+25°C

-4

0

mV

Overtemp

-5.5

0

mV

Input Bias Current(sense)

ICSENSE

VCM= 0V

-500

500

nA

Open Loop Gain

ACA

VCM= 0V, VOUT= 2 ~ 6V

80

110

dB

VOUT High

VHC

ILOAD= -500uA

8

V

VOUT Low

VLC

ILOAD= 500uA

0.3

0.5

V

Output Short Circuit Current

ISCC

VOUT= 0V

1.5

3.5

mA

Common Mode Range

VCMC

-0.3

5

V

Gain Bandwidth Product

GBC

Fin = 100kHz, 10mV p-p, (Note 1)

3

5

mHz

Reference

Output Voltage

VREF

IREF = 0mA, TA= 25°C

7.4

7.5

7.6

V

IREF= 0mA

7.35

7.5

7.65

V

Load Regulation

△VLOAD IREF= 1 ~ 10mA

0

8

20

mV

Line Regulation

△VLINE VCC=12 ~ 18V

0

14

25

mV

Short Circuit Current

ISCR

VREF= 0V

25

35

60

mA