ML4832CP 데이터 시트보기 (PDF) - Micro Linear Corporation

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ML4832CP

Electronic Dimming Ballast Controller

Micro Linear Corporation 

ML4832

PIN CONFIGURATION

ML4832

18-Pin DIP (P18)

EA OUT

IA OUT

ISINE

IA+

LAMP FB

LFB OUT

RSET

RT/CT

INTERRUPT

1

18

2

17

3

16

4

15

5

14

6

13

7

12

8

11

9

10

TOP VIEW

EA–/OVP

VREF

VCC

PFC OUT

OUT A

OUT B

P GND

GND

RX/CX

ML4832

18-Pin SOIC (S18)

EA OUT

IA OUT

ISINE

IA+

LAMP FB

LFB OUT

RSET

RT/CT

INTERRUPT

1

18

2

17

3

16

4

15

5

14

6

13

7

12

8

11

9

10

TOP VIEW

EA–/OVP

VREF

VCC

PFC OUT

OUT A

OUT B

P GND

GND

RX/CX

PIN DESCRIPTION

PIN# NAME

1 EA OUT

FUNCTION

PFC error amplifier output and

compensation node

2 IA OUT

Output and compensation node of the

PFC average current transconductance

amplifier

3 ISINE

4 IA+

PFC gain modulator input

Non-inverting input of the PFC average

current transconductance amplifier

and peak current sense point of the

PFC cycle by cycle current limit

comparator

5 LAMP FB Inverting input of an error amplifier

used to sense (and regulate) lamp arc

current. Also the input node for

dimming control.

6 LFB OUT Output from the lamp current error

transconductance amplifier used for

lamp current loop compensation

7 RSET

8 RT/CT

External resistor which sets oscillator

FMAX, and RX/CX charging current

Oscillator timing components

PIN#

9

NAME

INTERRUPT

FUNCTION

Input used for lamp-out detection

and restart. A voltage greater than

7.5 volts resets the chip and

causes a restart after a

programmable interval.

10 RX/CX

Sets the timing for the preheat,

dimming lockout, and interrupt

11 GND

Ground

12 P GND

Power ground for the IC

13 OUT B

Ballast MOSFET drive output

14 OUT A

Ballast MOSFET drive output

15 PFC OUT

Power Factor MOSFET drive

output

16 VCC

17 VREF

Positive supply for the IC

Buffered output for the 7.5V

voltage reference

18 EA–/OVP

Inverting input to PFC error

amplifier and OVP comparator

input

2

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