ML4831CP 查看數據表（PDF） - Micro Linear Corporation
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ML4831CP Datasheet PDF : 14 Pages
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R(X)/C(X)
10
C(X)
R(X)
6.8
0.625
R(SET)
+
1.2/3.4 –
+
1.2/6.8 –
INT
9
–
VREF
+
HEAT
DIMMING
LOCKOUT
R INHIBIT
Q
S
Figure 7. Lamp Preheat and Interrupt Timers
ML4831
LFB OUT is ignored by the oscillator until C(X) reaches
6.8V threshold. The lamps are therefore driven to full
power and then dimmed. The C(X) pin is clamped to
about 7.5V.
A summary of the operating frequencies in the various
operating modes is shown below.
Operating Mode
Preheat
Dimming
Lock-out
Dimming
Control
Operating Frequency
[F(MAX) to F(MIN)]
2
F(MIN)
F(MIN) to F(MAX)
6.8
3.4
R(X)/C(X)
1.2
.65
0
HEAT
DIMMING
LOCKOUT
7.5
INT
INHIBIT
Figure 8. Lamp Starting and Restart Timing
9
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