1-211

tPHL MAX

tPLH MIN

PDD* MAX = (tPHL- tPLH)MAX = tPHL MAX - tPLH MIN

*PDD = PROPAGATION DELAY DIFFERENCE

NOTE: FOR PDD CALCULATIONS THE PROPAGATION DELAYS

ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.

VOUT1

ILED2

VOUT2

ILED1

Q1 ON

Q2 OFF

Q1 OFF

Q2 ON

Figure 34. Minimum LED Skew for Zero Dead Time.

Figure 35. Waveforms for Dead Time.

Figure 36.Under Voltage Lock Out.

0

0

(VCC - VEE ) – SUPPLY VOLTAGE – V

10

5

14

10

15

2

20

6

8

4

12

(12.3, 10.8)

(10.7, 9.2)

(10.7, 0.1)

(12.3, 0.1)

Figure 37. Thermal Derating Curve,

Dependence of Safety Limiting Value

with Case Temperature per

VDE 0884.

0

0

TS – CASE TEMPERATURE – °C

200

600

400

25

800

50

75 100

200

150 175

PS (mW)

IS (mA)

125

100

300

500

700

tPLH

MIN

MAXIMUM DEAD TIME

(DUE TO OPTOCOUPLER)

= (tPHL MAX - tPHL MIN) + (tPLH MAX - tPLH MIN)

= (tPHL MAX - tPLH MIN) – (tPHL MIN - tPLH MAX)

= PDD* MAX – PDD* MIN

*PDD = PROPAGATION DELAY DIFFERENCE

NOTE: FOR DEAD TIME AND PDD CALCULATIONS ALL PROPAGATION

DELAYS ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.

VOUT1

ILED2

VOUT2

ILED1

Q1 ON

Q2 OFF

Q1 OFF

Q2 ON

tPHL MIN

tPHL MAX

tPLH MAX

= PDD* MAX

(tPHL-tPLH) MAX