UCC2626, UCC3626

SLUS318B – APRIL 1999 – REVISED JANUARY 2002

5

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electrical characteristics over recommended operating conditions, VCC = 12 V; CT = 1 nF,

R_TACH = 250 k

for the UCC3626 (unless otherwise noted)

hall buffer inputs

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

High-level input voltage

HALLA, HALLB, HALLC

1.7

1.9

2.1

V

Hysteresis

HALLA, HALLB, HALLC

0.6

1.0

V

Input current

0V < VIN < 5 V

–25

µA

oscillator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Frequency

RTACH = 250 kΩ, CT = 1nF

9.0

10.0

11.0

kHz

Frequency change with voltage

12 V < VCC < 14.5 V

3%

CT peak voltage

7.25

7.5

7.75

V

CT peak-to-valley voltage

4.75

5.0

5.25

V

SYNCH pin minimum pulse width

500

ns

tachometer

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

High-level output voltage/VREF

IOUT = –10 µA

99%

100%

Low-level output voltage

IOUT = 10 µA

0

20

mV

High-level on-resistance

IOUT = –100 µA

1

1.5

k

Ω

Low-level on-resistance

IOUT = 100 µA

1

1.5

k

Ω

High-level ramp threshold voltage

2.5

V

Ramp voltage

2.375

2.500

2.625

V

CTACH charge current

RTACH = 49.9 kΩ

48

51

53

µA

On time accuracy

UCC3626

See Note 1

–3%

3%

On-time accuracy

UCC2626

See Note 1

–4%

3%

direction output

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

High-level output voltage

IOUT = –100 µA

4.5

5.2

V

Low-level output voltage

IOUT = 100 µA

0

0.5

V

output

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Maximum duty cycle

100%

Lo

le el o tp t oltage

IOUT = 2 mA

0.0

0.1

0.5

V

Low-level output voltage

IOUT = 100 µA

0.0

0.1

V

High level output voltage

IOUT = –2 mA

4.0

4.8

5.2

V

High-level output voltage

IOUT = –100 µA

4.7

5.2

V

Rise and fall time

CI = 10 pF

100

ns

C

TACH

V

I

CHARGE