UC1825A-SP_15 datasheet(7/39 Pages) TI1

Numer części	UC1825A-SP

Szczegółowy opis	Rad-Tolerant Class-V, High-Speed PWM Controller

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Producent	TI1 [Texas Instruments]

Strona internetowa	http://www.ti.com

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130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

Gain-Full Load

10

0

10

1

10

2

10

3

10

4

10

5

10

6

10

7

Frequency (Hz)

Ove

rall Ga

in

– F

ull L

oad

EA

Comp

ensa

tio

n

CTL–

Output Full Load

0

-90

180

Full

Phase

130

120

110

100

90

80

70

60

50

40

30

20

10

0

-10

-20

-30

Gain-Light Load

10

0

10

1

10

2

10

3

10

4

10

5

10

6

10

7

Frequency (Hz)

Ove

rall Ga

in

– Lig

ht L

oad

EA

Comp

ensa

tio

n

CTL–

Outpu Light Load

0

-90

180

Light

Phase

UC1825A-SP

www.ti.com

SLUS873B – JANUARY 2009 – REVISED OCTOBER 2015

Electrical Characteristics (continued)

TA = –55°C to 125°C, RT = 3.65 kΩ, CT = 1 nF, VCC = 12 V, TA = TJ (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CURRENT LIMIT, START SEQUENCE, FAULT

ISS

Soft-start charge current

VSS = 2.5 V

8

14

20

μA

VSS

Full soft-start threshold voltage

4.3

5

V

IDSCH

Restart discharge current

VSS = 2.5 V

100

250

350

μA

ISS

Restart threshold voltage

0 V

≤ VILIM ≤ 1.5 V

0.3

0.5

V

IBIAS

ILIM bias current

15

μA

ICL

Current limit threshold voltage

0.95

1

1.05

V

Overcurrent threshold voltage

1.14

1.2

1.26

V

td

Delay-to-output time, ILIM(1)

VILIM = 0-V to 2-V step

50

80

ns

OUTPUT

IOUT = 20 mA

0.25

0.45

Low-level output saturation voltage

V

IOUT = 200 mA

1.2

2.2

IOUT = –20 mA

1.9

2.9

High-level output saturation voltage

V

IOUT = –200 mA

2

3

tr, tf

Rise/fall time(1)

CL = 1 nF

20

45

ns

UNDERVOLTAGE LOCKOUT (UVLO)

Start threshold voltage

8.3

9.2

9.6

V

UVLO hysteresis

0.4

0.8

1.25

V

SUPPLY CURRENT

Isu

Start-up current

VC = VCC = 8 V

100

300

μA

ICC

Input current

28

36

mA

7.6 Typical Characteristics

Figure 1. Gain: Light Load

Figure 2. Gain: Full Load

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Product Folder Links: UC1825A-SP

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