F3

ICE3AS02 / ICE3AS02G / ICE3BS02 / ICE3BS02G

Electrical Characteristics

Datasheet, Version 1.2

18

02 Sep 2005

4.3.4

PWM Section

4.3.5

Control Unit

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Fixed Oscillator

Frequency

ICE3AS02

ICE3AS02G

92

100

108

kHz

94

100

106

kHz

ICE3BS02

ICE3BS02G

61

67

73

kHz

63

67

71

kHz

Max. Duty Cycle

0.67

0.72

0.77

Min. Duty Cycle

0-

-

PWM-OP Gain

3.5

3.7

3.9

Voltage Ramp Max Level

-0.85

-

V

0.3

0.7

-

V

-

-

4.75

V

CS=1V, limited by

1)

The parameter is not subjected to production test - verified by design/characterization

FB Pull-Up Resistor

16

20

27

k

Ω

SoftS Pull-Up Resistor

39

50

62

k

Ω

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Deactivation Level for SoftS

Comparator C7 by C2

3.85

4.00

4.15

V

Normal Operating Mode

4.23

4.40

4.57

V

Activation Limit of

Comparator C3

5.20

5.40

5.60

V

SoftS Startup Current

-1.3

-mA

Over Load & Open Loop Detection

Limit for Comparator C4

4.62

4.80

4.98

V

Active Burst Mode Level for

Comparator C5

1.23

1.30

1.37

V

Active Burst Mode Level for

Comparator C6a

3.85

4.00

4.15

V

After Active Burst Mode

is entered