STA517B

Electrical characteristics

7/13

35

µA

Low logical state voltage VL (pin

PWRDN, TRISTATE)(seeTable 7)

0.8

V

High logical state voltage VH (pin

PWRDN, TRISTATE)(seeTable 7)

1.7

V

PWRDN

Supply current from Vcc in power down PWRDN = 0

3

mA

Output current pins

FAULT -TH-WARN when

FAULT CONDITIONS

Vpin = 3.3 V

1

mA

Supply current from Vcc in Tristate

Tristate = 0

22

mA

Supply current from Vcc in operation

both channel switching)

Input pulse width

= 50 % duty

Switching frequency

= 384 Khz;

No LC filters

70

mA

Over current protection threshold Isc

(short circuit current limit)1(1)

6.5

8

10

A

Under voltage protection threshold

7

V

Over voltage protection threshold

60

70

V

Output minimum pulse width

No load

25

40

ns

1.

See specific application note number: AN1994.

Table 6.

Electrical characteristics (continued)

(VL= 3.3 V; Vcc = 50 V; Tamb = 25 °C unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Table 7.

VLow, VHigh variation with VL

VLow min

VHigh max

Unit

2.7

0.7

1.5

V

3.3

0.8

1.7

V

5

0.85

1.85

V

Table 8.

Logic truth table (see Figure 2)

Tristate

INxA

INxB

Q1

Q2

Q3

Q4

Output mode

0

x

x

OFF

OFF

OFF

OFF

Hi-Z

1

0

0

OFF

OFF

ON

ON

DUMP

1

0

1

OFF

ON

ON

OFF

NEGATIVE

1

1

0

ON

OFF

OFF

ON

POSITIVE

1

1

1

ON

ON

OFF

OFF

Not used