Electrical characteristics (continued) – Rainbow Electronics MAX754 User Manual
Page 3
MAX753/MAX754
CCFL Backlight and
LCD Contrast Controllers
_______________________________________________________________________________________
3
Note 1:
Maximum shutdown current occurs at BATT = LX = 0V.
Note 2:
Timing specifications are guaranteed by design and not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V, BATT = 15V, CON = LON = 5V, LX = GND = PGND = 0V, I
REF
= 0mA, all digital input levels are 0V or 5V,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
At zero scale (code = 0)
At full scale (DAC code = 31)
At full scale (DAC code = 63)
Guaranteed monotonic
BATT = 4V, LX = 0V
BATT = 16V
Sink current, CFB = 5V, CC = 2.5V
Source current, CFB = 0V, CC = 2.5V
At zero scale (code = 0)
BATT = 4V
CONDITIONS
µA
12
20
LX Input Current
µA
12
20
BATT Input Current
nA
±150
LFB Input Leakage Current
595
625
655
893
928
963
mV
1200
1240
1280
MAX753 Feedback Voltage (REF-LFB)
Bits
6
DAC Resolution
µs
35
70
Switching Period
0.5
1.5
µs
2
5
Switch On-Time
745
782
820
mV
1210
1250
1290
Feedback Voltage (CFB)
200
µA
50
Feedback-Amplifier Output Current
V/µs
0.4
Feedback-Amplifier Slew Rate
320
343
365
nA
±100
Feedback-Amplifier Input Bias Current
MHz
1
Feedback-Amplifier Unity-Gain Bandwidth
UNITS
MIN
TYP
MAX
PARAMETER
At preset DAC, CON = 0V, CADJ = 5V
(code = 15)
ns
100
CADJ, LADJ High Width (t
SH
)
ns
0
Reset Hold Time (t
RH
)
ns
0
Reset Setup Time (t
RS
)
ns
110
Reset Pulse Width (t
R
)
At preset DAC, LON = 0V, LADJ = 5V
(code = 31)
LON = CON = CS = LFB = CFB = LADJ =
CADJ = LX = 0V
LON = CON = CS = LFB = CFB = LADJ =
CADJ = 0V, LX = BATT = 15V
ns
100
CADJ, LADJ Low Width (t
SL
)
ns
50
CADJ Low to CON Low or
LADJ Low to LON Low (t
SD
)
At zero scale (code = 0)
At preset DAC, LON = 0V, LADJ = 5V
(code = 31)
At full scale (DAC code = 63)
610
635
660
905
938
971
mV
1210
1250
1290
MAX754 Feedback Voltage (LFB)
LCD CONTROLLER
TIMING
(Note 2)