UC3844/45

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

3 of 6

www.unisonic.com.tw

QW-R103-010.G



PARAMETER

SYMBOL

RATINGS

UNIT

Current Sense and Voltage feedback Inputs

-0.3 ~ +5.5

V

Total Power Supply and Zener Current

30

mA

Error Amp Output Sink Current

10

mA

Output Current, Source or Sink (Note 2)

1.0

A

Output Energy (Capacitive Load per cycle)

W

5.0

μJ

Power Dissipation

DIP-8

1250

mW

SOP-8

800

Junction Temperature

+150

°C

Operation Temperature

0 ~ 70

°C

Storage Temperature

-65 ~ +150

°C

Note: 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. Maxmum package power dissipation limits must be observed.



THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

Junction to Ambient

SOP-8

156

°C/W

DIP-8

100



ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

REFERENCE SECTION

Reference Output Voltage

4.9

5.0

5.1

V

Line Regulation

△

2.0

20

mV

Load Regulation

△

3.0

25

mV

Temperature Stability

0.2

mV/°C

Total Output Variation over Line,

Load, Temperature

4.82

5.18

V

Output Noise Voltage

50

μV

Long Term Stability

S

5

mV

Output Short Circuit Current

-30

-85

-180

mA

OSCILLATOR SECTION

Oscillator Voltage Swing

1.6

V

Discharge Current

10.8

mA

Frequency

47

52

57

kHz

46

60

Frequency Change with Voltage

0.2

1.0

%

Frequency Change with Temperature

5.0

%

ERROR AMPLIFIER SECTION

Voltage Feedback Input

2.42

2.50

2.58

V

Output Voltage Swing

High

5.0

6.2

V

Low

0.8

1.1

Output Current

Sink

2.0

12

mA

Source

-0.5

-1.0

Input Bias Current

-0.1

-2.0

μA

Open Loop Voltage Gain

65

90

dB

Power Supply Rejection Ratio

PSRR

60

70

dB

Unity Gain Bandwidth

0.7

1.0

MHz