GM3842AS8T datasheet(5/19 Pages) GAMMA

Part #	GM3842AS8T

Description	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

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Manufacturer	GAMMA [Gamma Microelectronics Inc.]

Direct Link	http://www.gammamicro.com.tw/

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5

ELECTRICAL CHARACTERISTICS

(T = 0°C to 70°C, *V

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

ACC

T

TYP

MAX

UNIT

CHARACTERISTICS

TEST CONDITIONS

MIN

SYMBOL

Reference Section

Oscillator Section

Error Amplifier Section

Current Sense Section

Output Section

Undervoltage Lockout Section

Reference Output Voltage

Oscillation Frequency

Input Bias Current

Current Sense Input Voltage Gain

Rise Time

Fall Time

Low Output Voltage

Start Threshold

High Output Voltage

Minimum Operating Voltage

(after tum ON)

Line Regulation

Frequency Change with Voltage

Input Voltage

Maximum Input Signal

Load Regulation

Oscillator Amplitude

Open Loop Voltage Gain

Supply Voltage Rejection

Power Supply Rejection Ratio

Input Bias Current

Output Sink Current

Output Source Current

High Output Voltage

Low Output Voltage

Short Circuit Output Current

VREF

f

DVREF

Df/ DVCC

VI(EA)

VI(MAX)

DVREF

V(OSC)

AVOL

SVR

PSRR

ISC

T = 25°C, I

= 1mA

J

REF

T = 25°C

J

V

= 3V

FB

(Note 1 and 2)

T = 25°C, C = 1nF(Note 3)

JL

T = 25°C, C = 1nF(Note 3)

JL

I

= 20mA

SINK

GM3842A, GM3844A

I

= 20mA

SOURCE

GM3842A, GM3844A

4.9

47

5.0

52

-0.1

3.0

45

35

0.08

16.0

13.5

10

6.0

1.6

90

70

-3.0

7

-1.0

6.0

0.8

-100

5.1

57

-2

3.15

150

0.4

17.5

20

1.0

2.58

1.1

2.2

9.0

25

-180

V

kHz

µA

V/ V

nS

mV

%

V

mV

V

dB

µA

mA

12V

V

25V

CC

12V

V

25V

CC

V

=2.5V

PIN1

V

=5V (Note 1)

PIN1

I

= 200mA

SINK

GM3843A, GM3845A

I

= 200mA

SOURCE

GM3843A, GM3845A

1mA

20mA

IREF

(Peak to Peak)

T =25°C

A

0.05

2.5

1.0

1.4

8.4

13

7.6

IBIAS

GV

tR

tF

VOL

VTH(ST)

VOH

VOPR(MIN)

2V

V

4V

O

65

60

2

-0.5

5.0

12V

V

25V

CC

V

=2.7V,

PIN2

V

=1.1V

PIN1

V

=2.3V,

PIN2

V

=5V

PIN1

V

=2.3V, R

PIN2

=15kW to GND

L

V

=2.7V, R

PIN2

=15kW to PIN8

L

ISINK

ISOURCE

VOH

VOL

mA

V

1.1

2.85

0.9

12V

V

25V (Note 1)

CC

IBIAS

V

=3V

PIN3

-10

13

8.5

12

7.0

14.5

7.8

11.5

8.2

2.42

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