UCC3813-5 datasheet(3/8 Pages) ETC

Part #	UCC3813-5

Description	Low Power Economy BiCMOS Current Mode PWM

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UCC2813-0/-1/-2/-3/-4/-5

UCC3813-0/-1/-2/-3/-4/-5

ELECTRICAL CHARACTERISTICSUnless otherwise stated, these specifications apply for –40°C

£ TA £ +85°C for

UCC2813-x; 0°C

£ TA £ +70°C for UCC3813-x; VCC = 10V (Note 3); RT = 100k from REF to RC; CT=330pF from RC to GND;

0.1

mF capacitor from VCC to GND; 0.1mF capacitor from VREF to GND. TA =TJ.

PARAMETER

TEST CONDITIONS

UCC2813-x

UCC3813-x

UNITS

MIN

TYP

MAX

Error Amplifier Section

Input Voltage

COMP = 2.5V; UCCx813-0/-1/-2/-4

2.42

2.50

2.56

V

COMP = 2.0V; UCCx813-3/-5

1.92

2.0

2.05

V

Input Bias Current

–22

mA

Open Loop Voltage Gain

60

80

dB

COMP Sink Current

FB = 2.7V, COMP = 1.1V

0.4

2.5

mA

COMP Source Current

FB = 1.8V, COMP = REF – 1.2V

–0.2

–0.5

–0.8

mA

Gain Bandwidth Product

(Note 9)

2

MHz

PWM Section

Maximum Duty Cycle

UCCx813-0/-2/-3

97

99

100

%

UCCx813-1/-4/-5

48

49

50

%

Minimum Duty Cycle

COMP = 0V

0

%

Current Sense Section

Gain

(Note 5)

1.10

1.65

1.80

V/V

Maximum Input Signal

COMP = 5V (Note 6)

0.9

1.0

1.1

V

Input Bias Current

–200

200

nA

CS Blank Time

50

100

150

ns

Over-Current Threshold

1.32

1.55

1.70

V

COMP to CS Offset

CS = 0V

0.45

0.90

1.35

V

Output Section

OUT Low Level

I = 20mA, all parts

0.1

0.4

V

I = 200mA, all parts

0.35

0.90

V

I = 50mA, VCC = 5V, UCCx813-3/-5

0.15

0.40

V

I = 20mA, VCC = 0V, all parts

0.7

1.2

V

OUT High VSAT

(VCC-OUT)

I = –20mA, all parts

0.15

0.40

V

I = –200mA, all parts

1.0

1.9

V

I = –50mA,VCC = 5V, UCCx813-3/-5

0.4

0.9

V

Rise Time

CL = 1nF

41

70

ns

Fall Time

CL = 1nF

44

75

ns

Undervoltage Lockout Section

Start Threshold (Note 8)

UCCx813-0

6.6

7.2

7.8

V

UCCx813-1

8.6

9.4

10.2

V

UCCx813-2/-4

11.5

12.5

13.5

V

UCCx813-3/-5

3.7

4.1

4.5

V

Stop Threshold (Note 8)

UCC1813-0

6.3

6.9

7.5

V

UCC1813-1

6.8

7.4

8.0

V

UCCx813-2/-4

7.6

8.3

9.0

V

UCCx813-3/-5

3.2

3.6

4.0

V

Start to Stop Hysteresis

UCCx813-0

0.12

0.3

0.48

V

UCCx813-1

1.6

2

2.4

V

UCCx813-2/-4

3.5

4.2

5.1

V

UCCx813-3/-5

0.2

0.5

0.8

V

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