UC2843B(2009) Ver la hoja de datos (PDF) - Unisonic Technologies

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Fabricante

UC2843B
(Rev.:2009)

HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

Unisonic Technologies 

UC2843B

Preliminary

LINEAR INTEGRATED CIRCUIT

„ ELECTRICAL CHARACTERISTICS

(VCC = 15 V, RT = 10kΩ, CT = 3.3nF, TJ=25°C, unless otherwise specified)

PARAMETER

REFERENCE SECTION

Reference Output Voltage

Line Regulation

Load Regulation

Average Temperature Coefficient Of

Output Voltage

Total Output Variation

Output Noise Voltage

Long Term Stability

Output Short Circuit Current

OSCILLATOR SECTION

Frequency

Frequency Change with Voltage

Frequency Change with

Temperature

Oscillator Voltage Swing

Discharge Current

ERROR-AMPLIFIER SECTION

Voltage Feedback Input

Input Bias Current

Open Loop Voltage Gain

Unity Gain Bandwidth

Power Supply Rejection Ratio

Output Sink Current

Output Source Current

Output Voltage Swing High State

CURRENT-SENSE SECTION

Current Sense Input Voltage Gain

Maximum Current Sense Input

Threshold

Power Supply Rejection Ratio

Input Bias Current

Propagation Delay

OUTPUT SECTION

High-Level Output Voltage

Low-Level Output Voltage

Under-Voltage Lockout

Output Voltage

Output Voltage Rise Time

Output Voltage Fall Time

SYMBOL

VREF

ΔVOUT

ΔVOUT

TS

VREF

eN

ISC

fOSC

ΔfOSC

ΔV

ΔfOSC

ΔT

VOSC

IDISC

VFB

II(BIAS)

GVO

GBW

PSRR

ISINK

ISOURCE

VOH

VOL

GV

VTH

PSRR

II(BIAS)

tD

VOH

VOL

VUVLO

tR

tF

TEST CONDITIONS

IOUT =1mA, TJ =25°C

VCC = 12V~25V

IOUT = 1mA~20mA

MIN

4.95

VCC =12V~25V, IOUT =1mA~20mA 4.9

f = 10Hz~10kHz, TJ =25°C

TJ=25°C FOR 1000 hours

-30

TJ =25°C,

RT =62kΩ, CT =1nF,

Min =225 kHz, Max =275 kHz

TJ = Full range

VCC = 12V ~ 25V

TJ = Full range

Peak to peak

TJ =25°C, RT/CT =2V

RT/CT =2V

COMP =2.5V

49

48

7.8

7.5

2.45

VOUT =2V~4V

65

0.7

VCC =12V~25V

60

VFB =2.7V, COMP=1.1V

2

VFB =2.3V, COMP =5V

-0.5

VFB =2.3V, RL =15kΩ to GND

5

VFB =2.7V, RL =15kΩ to GND

(Note 2,3)

2.85

COMP =5V (Note 2)

0.9

VCC =12V~25V (Note 2)

VFB =0V~2V

IOH =-20mA

13

IOH =-200mA

12

IOL =20mA

IOL =200mA

VCC =5V, IOL=1mA

CL =1nF, TJ = 25°C

CL =1nF, TJ = 25°C

TYP MAX UNIT

5 5.05 V

6 20 mV

6 25 mV

0.2 0.4 mV/°C

5.1 V

50

μV

5 25 mV

-100 -180 mA

52 55 kHz

56 kHz

0.2 1 %

5

%

1.7

V

8.3 8.8 mA

8.8 mA

2.5 2.55 V

-0.3 -1 μA

90

dB

1

MHz

70

dB

6

mA

-0.8

mA

6

V

0.7 1.1 V

3 3.15 V/V

1 1.1 V

70

dB

-2 -10 μA

150 300 ns

13.5

V

13.5

V

0.1 0.4 V

1.5 2.2 V

0.7 1.2 V

50 150 ns

50 150 ns

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

5 of 9

QW-R103-048.a

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