ml4832 Microsemi Corporation, ml4832 Datasheet - Page 10

• Manufacturer Part Number: ml4832
• Description: Electronic Dimming Ballast Controller
• Manufacturer: Microsemi Corporation

ML4832
FUNCTIONAL DESCRIPTION
the lamp fails to strike or is out of socket. Typically this
time is set to be fairly long by choosing a large value
of R
LFB OUT is ignored by the oscillator until C
threshold. The lamps are therefore driven to full power and
then dimmed. The C
10
DIMMING
LOCKOUT
X
.
INHIBIT
R
HEAT
X
INT
/C
X
6.8
4.8
1.2
.65
7.5
0
X
pin is clamped to about 7.5V.
Figure 8. Lamp Starting and Restart Timing
(Continued)
X
reaches 6.8V
A summary of the operating frequencies in the various
operating modes is shown below.
OPERATING MODE
DIMMING
CONTROL
Dimming
Lock-out
Preheat
OPERATING FREQUENCY
[F(MAX) to F(MIN)]
F(MIN) TO F(MAX)
F(MIN)
2