ML4836CS 查看數據表（PDF） - Micro Linear Corporation

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ML4836CS

Compact Fluorescent Electronic Dimming Ballast Controller

Micro Linear Corporation 

FUNCTIONAL DESCRIPTION

The ML4836 consists of flexible ballast control section.

Start-up and lamp-out retry timing are controlled by the

selection of external timing components, allowing for

control of a wide variety of different lamp types. The

ballast section controls the lamp power using frequency

modulation (FM) with additional programmability

provided to adjust the VCO frequency range. This allows

for the IC to be used with a variety of different output

networks. Figure 1 depicts a detailed block diagram of

ML4836.

The ML4836 provides several safety features. See the

corresponding sections for more details:

ML4836

• End-of-lamp life detection to detect EOL and shut-off

lamps; See End Of Life Section.

• Thermal shutdown for temperature sensing extremes;

See IC Bias, Under-Voltage Lockout and Thermal

Shutdown Section.

• Relamping starting with anti-flash for programmable

restart for lamp out conditions while minimizing

“flashing” when powering from full power to dimming

levels; See Starting, Re-Start, Preheat and Interrupt

Section

REF

1

6.75V

REF_OK

+

–

VCC

14

REF

AGND

10

THERMAL SHUTDOWN

TEMP

140ºC/100ºC

QR

QS

QS

QR

–

14V

+

UVLO

RX/CX

8

RSET

4

Q

T

Q

4.65V/

1.75V

PREHEAT

+

–

CLK

OSCILLATOR

V TO I

V TO I

Figure 1. Detailed Block Diagram

OUT A

13

OUT B

12

PGND

11

PWDET

9

1.05V

COMP

1.20V/1V

INTERRUPT 7

RX/CX

6.65V/1.25V

RT2

5

RT/CT

6

LEAO

3

LAMP FB

2

2.5V

5

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