UC3842AD

更新时间： 2024-02-12 17:03:34

品牌	Logo	应用领域
德州仪器 - TI		开关光电二极管控制器
页数	文件大小	规格书
11页	659K
描述
Current Mode PWM Controller

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数据手册

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UC3842AD 数据手册

UC1842A/3A/4A/5A

UC2842A/3A/4A/5A

UC3842A/3A/4A/5A

ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for –55°C ≤ TA ≤ 125°C for the

UC184xA; –40°C ≤ TA ≤ 125°C for the UC284xAQ; –40°C ≤ TA ≤ 85°C for the UC284xA; 0 ≤ TA ≤ 70°C for the UC384xA; VCC = 15V

(Note 5); RT = 10k; CT = 3.3nF; TA = TJ; Pin numbers refer to DIL-8.

UC184xA\UC284xA

UC384xA

PARAMETER

Reference Section

TEST CONDITIONS

UNITS

MIN. TYP. MAX. MIN. TYP. MAX.

Output Voltage

TJ = 25°C, IO = 1mA

4.95

4.9

5.00

5.05

4.90

4.82

5.00

5.10

Line Regulation

12 ≤ VIN 25V

1 ≤ IO ≤ 20mA

(Note 2, Note 7)

Load Regulation

Temp. Stability

0.2

0.4

5.1

0.2

0.4

5.18

mV/°C

Total Output Variation

Output Noise Voltage

Line, Load, Temp.

10Hz ≤ f ≤ 10kHz

TJ = 25°C (Note 2)

TA = 125°C, 1000Hrs. (Note 2)

µV

Long Term Stability

Output Short Circuit

Oscillator Section

Initial Accuracy

-30

-100

-180

-30

-100

-180

TJ = 25°C (Note 6)

0.2

kHz

Voltage Stability

Temp. Stability

12 ≤ VCC ≤ 25V

TMIN ≤ TA ≤ TMAX (Note 2)

VPIN 4 peak to peak (Note 2)

TJ = 25°C, VPIN 4 = 2V (Note 8)

VPIN 4 = 2V (Note 8)

Amplitude

1.7

8.3

1.7

8.3

Discharge Current

7.8

7.5

8.8

7.8

7.6

8.8

Error Amp Section

Input Voltage

VPIN 1 = 2.5V

2.45

2.50

-0.3

2.55

-1

2.42

2.50

-0.3

2.58

-2

µA

MHz

Input Bias Current

AVOL

2 ≤ VO ≤ 4V

TJ = 25°C (Note 2)

0.7

Unity Gain Bandwidth

PSRR

12 ≤ VCC ≤ 25V

Output Sink Current

Output Source Current

VOUT High

VPIN 2 = 2.7V, VPIN 1 = 1.1V

VPIN 2 = 2.3V, VPIN 1 = 5V

VPIN 2 = 2.3V, RL = 15k to ground

VPIN 2 = 2.7V, RL = 15k to Pin 8

-0.5

-0.8

-0.5

-0.8

VOUT Low

0.7

1.1

0.7

1.1

Current Sense Section

Gain

(Note 3, Note 4)

2.85

0.9

3.15

1.1

2.85

0.9

3.15

1.1

V/V

Maximum Input Signal

PSRR

VPIN 1 = 5V (Note 3)

12 ≤ VCC ≤ 25V (Note 3)

-2

µA

Input Bias Current

Delay to Output

Output Section

Output Low Level

-10

VPIN 3 = 0 to 2V (Note 2)

150

300

150

300

ISINK = 20mA

0.1

0.4

2.2

0.1

0.4

2.2

ISINK = 200mA

Output High Level

ISOURCE = 20mA

13.5

ISOURCE = 200mA

Rise Time

TJ = 25°C, CL = 1nF (Note 2)

VCC = 5V, ISINK = 10mA

150

1.2

150

1.2

Fall Time

UVLO Saturation

0.7

1 234 5 6 7...11

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