Rainbow Electronics MAX8759 - Manual (Page 6)

MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V BATT = 12V, V CC = V DD, T A = -40°C to +85°C.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
PWMI Input Low Voltage 0.7 V
PWMI Input High Voltage 2.1 V
PWMI Input Frequency Range 5 50 kHz
PWMI duty cycle = 100% 98
PWMI duty cycle = 50% 48 52 PWMI Brightness Setting
PWMI duty cycle = 0% 9.7 10.3
%
ALS Full-Adjustment Range 0 1.8 V
VALS Output Voltage
MAX8759 is enabled, 6V < V BATT < 28V,
I LOAD = 1mA
5.10 5.50 V
VALS On-Resistance MAX8759 is enabled 60 Ω
V BATT = 9V, R THR = 100k Ω 0 0.3
Zero-Crossing Delay
V
BATT
= 12V, R
THR
= 100k Ω 1.50 2.10
µs
Maximum Zero-Crossing Delay V BATT = 16V, R THR = 100k Ω 3.2 4.4 µs
DEL rising 4.5
DEL Disable Threshold
DEL falling 3.9
V
V ISEC < 1.25V and V IFB < 540mV; V FLT = 2V 0.8 1.2
V ISEC < 1.25V and V IFB > 660mV; V FLT = 2V -1.5 -0.8 TFLT Charge Current
V ISEC > 1.25V and V IFB > 660mV; V FLT = 2V 115 155
µA
TFLT Trip Threshold Rising edge 3.7 4.3 V
SDA, SCL, Input Low Voltage 0.7 V
SDA, SCL, Input High Voltage 2.1 V
SDA Output Low-Sink Current V SDA = 0.4V 4 mA
SMBus Frequency 10 100 kHz
SMBus Free Time t BUF 4.7 µs
SCL Serial Clock High Period t HIGH 4 µs
SCL Serial Clock Low Period t LOW 4.7 µs
START Condition Setup Time t SU:STA 4.7 µs
START Condition Hold Time t
HD:STA
4 µs
STOP Condition Setup Time from SCL t SU:STO 4 µs
SDA Valid to SCL Rising-Edge Setup Time,
Slave Clocking in Data
t SU:DAT 250 ns
SCL Falling Edge to SDA Transition t HD:DAT 0 ns
SCL Falling Edge to SDA Valid,
Reading Out Data
t DV 200 ns
Note 1: Specifications to -40°C are guaranteed by design, not production tested.