AMC384XBD datasheet(5/11 Pages) ADDTEK

No de pièce	AMC384XBD

Description	CURRENT MODE PWM CONTROLLER

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Fabricant	ADDTEK [ADDtek Corp]

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AMC3842B/43B/44B/45B

Copyright

5

DD019_F

--

OCTOBER 2006

ELECTRICAL CHARACTERISTICS (Continued)

Error Amplifier Section

Input Bias Current

IBIAS

-0.1

-2

µA

Input Voltage

VI(EA)

COMP = 2.5V

2.42

2.50

2.58

V

Open Loop Voltage Gain

GVO

2V

≤ V

O ≤ 4V

65

90

dB

Unity Gain Bandwidth (note 8)

UGBW

TJ = 25

OC

0.7

1

MHz

Power Supply Rejection Ratio

PSRR

12V

≤ V

CC ≤ 25V

60

70

dB

Output Sink Current

ISINK

VFB = 2.7V, COMP = 1.1V

2

7

mA

Output Source Current

ISOURCE

VFB = 2.3V, COMP = 5.0V

-0.5

-1.0

mA

High Output Voltage

VOH

VFB = 2.3V, RL = 15KΩ to GND

5

6

V

Low Output Voltage

VOL

VFB = 2.7V, RL = 15KΩ to VREF

0.7

1.1

V

Output Section

ISINK = 20mA

0.1

0.4

Output Low Level

VOL

ISINK = 200mA

1.4

2.2

V

ISOURCE = 20mA

13

13.5

Output High Level

VOH

ISOURCE = 200mA

12

13.0

V

Rise Time (note 9)

tr

TJ = 25

OC, CL = 1nF

50

150

ns

Fall Time (note 9)

tf

TJ = 25

OC, CL = 1nF

50

150

ns

Under-Voltage Lockout Section

AMC3842B/44B

14.5

16.0

17.5

Start Threshold

VTH(ST)

AMC3843B/45B

7.8

8.4

9.0

V

AMC3842B/44B

8.5

10

11.5

Min. Operating Voltage

AMC3843B/45B

7.0

7.6

8.2

V

PWM Section

AMC3842B/43B

94

97

100

Maximum Duty Cycle

Dmax

AMC3844B/45B

47

48

50

%

Total Standby Current

AMC3842B/44B

0.2

Startup Current

AMC3843B/45B

0.2

mA

Operating Supply Current

ICC

VFB = ISENSE = 0V

14

17

mA

Zener Voltage

VZ

ICC = 25mA

30

35

V

Note 7:

Adjust VCC above the start threshold before setting at 15V

Note 8:

These parameters, although guaranteed, are not 100% tested in production prior to shipment

Note 9:

Parameters are measured at trip point of latch with VFB = 2V

Note 10:

Gain is measured between ISENSE and COMP with the input changing from 0V to 0.8V

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