6

(T = 0°C to 70°C, *V

=15V, C =3.3nF, R =10kW, unless otherwise specified )

ACC

T

T

TYP

MAX

UNIT

CHARACTERISTICS

TEST CONDITIONS

MIN

SYMBOL

PWM Section

Total Standby Current

Maximum Duty Cycle

Minimum Duty Cycle

Zener Voltage

Operating Supply Current

Start-Up Current

GM3842A, GM3843A

GM3844A, GM3845A

95

47

97

48

100

50

0

17

0.3

%

%

V

mA

mA

V

=

=0V

PIN3

I

= 25mA

CC

30

38

13

0.17

* Adjust V

above the Startup threshold before setting to 15 V.

CC

Note1: Parameter measured at trip point of latch with V

= 0.

PIN2

Note2: Gain defined as A=DV

/ DV

; 0

V

0.8V

PIN1

PIN3

PIN3

Note3: These parameters, although guaranteed, are not 100% tested in production

TYPICAL PERFORMANCE CHARACTERISTICS

50

20

10

1

2

5

10

20

30

50

100

200 300 500

(KW)

fosc

(kHz)

V

= 15V

CC

T =25°C

A

Figure 1. Timing Resistor vs. Oscillator Frequency

C = 1000pF

T

C = 200pF

T

C = 500pF

T

C = 10pF

T

C = 5nF

T

C = 2nF

T

C = 1nF

T

50

20

10

1

2

5

10

20

30

50

100

200 300 500

%

fosc

(kHz)

V

= 15V

CC

T =25°C

A

Figure 2. Output Dead-Time vs. Oscillator Frequency

C = 1000pF

T

C = 200pF

T

C = 5nF

T

C = 2nF

T

C = 1nF

T

C = 500pF

T

C = 10pF

T

30

3

%

GM3842A/ 43A/ 44A/ 45A