Rainbow Electronics MAX8759 - Manual (Page 4)

MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V BATT = 12V, V CC = V DD, T A = 0°C to +85°C. Typical values are at T A = +25 °C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V BATT = 9V, R THR = 100k Ω 0 0.15 0.30
Zero-Crossing Delay
V BATT = 12V, R THR = 100k Ω 1.50 1.80 2.10
µs
Maximum Zero-Crossing Delay V BATT = 16V, R THR = 100k Ω 3.2 3.8 4.4 µs
DEL rising 4.5
DEL Disable Threshold
DEL falling 3.8
V
V ISEC < 1.25V and V IFB < 540mV; V FLT = 2V 0.9 1.0 1.1
V ISEC < 1.25V and V IFB > 660mV; V FLT = 2V -1.5 -1.2 -0.8 TFLT Charge Current
V
ISEC
> 1.25V and V
IFB
> 660mV; V
FLT
= 2V 115 135 155
µA
TFLT Trip Threshold Rising edge 3.7 4 4.3 V
SDA, SCL, Input Low Voltage 0.7 V
SDA, SCL, Input High Voltage 2.1 V
SDA, SCL, Input Hysteresis 100 mV
SDA, SCL, Input Bias Current -1 +1 µA
SDA Output Low Sink Current V SDA = 0.4V 4 mA
SMBus Frequency 10 100 kHz
SMBus Free Time t BUF 4.7 1 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