ML4823MJ datasheet(2/9 Pages) FAIRCHILD

Teilenummer	ML4823MJ

Bauteilbeschribung	High Frequency Power Supply Controller

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Hersteller	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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2 / 9 page

ML4823

2

REV. 1.0 10/12/2000

PIN CONFIGURATION

NAME

FUNCTION

NAME

FUNCTION

1 (2)

INV

Inverting input to error amp.

2 (3)

NI

Non-inverting input to error amp.

3 (4)

E/A OUT Output of error amplifier and input to

main comparator.

4 (5)

CLOCK

Oscillator output.

5 (7)

RT

Timing resistor for oscillator — sets

charging current for oscillator timing

capacitor (pin 6).

6 (8)

CT

Timing capacitor for oscillator.

7 (9)

RAMP

Non-inverting input to main

comparator. Connected to CT for

Voltage mode operation or to current

sense resistor for current mode.

8 (10)

SS

Normally connected to soft start

capacitor.

PIN DESCRIPTION (Pin Numbers in Parentheses are for PLCC Version)

9 (12) ILIM/S.D.

Current limit sense pin. Normally

connected to current sense resistor.

10 (13) GND

Analog signal ground.

11 (14) ILIM REF

Reference input for cycle-by-cycle

current limit comparator.

12 (15) PWR GND Return for the high current totem

pole output.

13 (17) VC

Positive supply for the high current

totem pole output.

14 (18) OUT B

High current totem pole output.

15 (19) VCC

Positive supply for the IC.

16 (20) 5.1V REF

Buffered output for the 5.1V voltage

reference.

INV

NI

E/A OUT

CLOCK

RT

CT

RAMP

SS

5.1V REF

VCC

OUTPUT

VC

PWR GND

ILIM REF

GND

ILIM/S.D.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

TOP VIEW

32

1

20

19

18

17

16

15

14

910

11

12

13

4

5

6

7

8

OUTPUT

VC

NC

PWR GND

ILIM REF

E/A OUT

CLOCK

NC

RT

CT

TOP VIEW

ML4823

16-PIN DIP (P16)

16-PIN SOIC (S16W)

ML4823

20-PIN PLCC (Q20)

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