UC3845L-D08-T 查看數據表（PDF） - Unisonic Technologies

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UC3845L-D08-T

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

Unisonic Technologies 

UC3844/45

LINEAR INTEGRATED CIRCUIT

„ ABSOLUTE MAXIMUM RATINGS (TA=25°C)

PARAMETER

SYMBOL

RATINGS

UNIT

Total Power Supply and Zener Current

(ICC+Iz)

30

mA

Output Current, Source or Sink (Note 2)

IOUT

Output Energy (Capacitive Load per cycle)

W

1.0

A

5.0

μJ

Current Sense and Voltage feedback Inputs

VIN

-0.3 ~ +5.5

V

Error Amp Output Sink Current

ISINK

10

mA

Power Dissipation

SOP-8

DIP-8

PD

862

mW

1250

mW

Junction Temperature

Operation Temperature

Storage Temperature

TJ

TOPR

TSTG

+150

°C

0 ~ 70

°C

-65 ~ +150

°C

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

Note:1. 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

Junction to Ambient

SOP-8

DIP-8

SYMBOL

θJA

RATINGS

145

100

„ ELECTRICAL CHARACTERISTICS

(TA=25°C, VCC=15V, RT=10k, CT=3.3nF, 0°C ≤ TA ≤ 70°C, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

REFERENCE SECTION

Reference Output Voltage

Line Regulation

Load Regulation

VREF

IOUT=1.0mA,TJ=25 C

4.9

△VOUT VCC=12V ~ 25V

△VOUT IOUT=1.0mA ~ 20mA

Temperature Stability

Total Output Variation over Line,

Load, Temperature

tS

VREF

4.82

Output Noise Voltage

Long Term Stability

eN

f=10Hz ~ kHz, TJ=25°C

S

TA=125°C for 1000 Hours

Output Short Circuit Current

ISC

-30

OSCILLATOR SECTION

Oscillator Voltage Swing

Discharge Current

VOSC

IDSG

VOSC=2.0V, TJ=25°C

Frequency

fOSC

TJ=25°C,

0°C ≤ TA ≤ 70°C

47

46

Frequency Change with Voltage

ΔfOSC/ΔV VCC=12V ~ 25V

Frequency Change with Temperature ΔfOSC/ΔT 0°C ≤ TA ≤ 70°C

ERROR AMPLIFIER SECTION

Voltage Feedback Input

VFB

VOUT=2.5V

2.42

Output Voltage Swing

High

Low

VOH

RL=15k to ground, VFB=2.3V 5.0

VOL

RL=15k to VREF, VFB=2.7V

Output Current

Sink

ISINK

VOUT=1.1V, VFB=2.7V

2.0

Source ISOURCE VOUT=5.0V, VFB=2.3V

-0.5

Input Bias Current

II(BIAS)

VFB=2.7V

Open Loop Voltage Gain

GVO

VOUT=2.0V ~ 4.0V

65

Power Supply Rejection Ratio

PSRR VCC=12V ~ 25V

60

Unity Gain Bandwidth

GBW TJ=25°C

0.7

TYP

5.0

2.0

3.0

0.2

50

5

-85

1.6

10.8

52

0.2

5.0

2.50

6.2

0.8

12

-1.0

-0.1

90

70

1.0

UNIT

°C/W

°C/W

MAX UNIT

5.1 V

20 mV

25 mV

mV/°C

5.18 V

μV

mV

-180 mA

V

mA

57 kHz

60

1.0 %

%

2.58 V

V

1.1

mA

-2.0 μA

dB

dB

MHz

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

4 of 7

QW-R103-010.D

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