Rainbow-electronics MAX8709 Manual do Utilizador descarregar pdf (Página 3)

MAX8709

High-Efficiency CCFL Backlight

Controller with SMBus Interface

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1. V

BATT

= 12V, V

LOT

= V

REF

, V

= V

DD,

SUS

= 5.3V, T

= 0°C to +85°C. Typical values are at T

= +25°C,

unless otherwise noted.)

PARAMETER CONDITIONS

MIN

TYP

MAX

UNITS

LOT Input Voltage Range 0.5

REF

LOT Input Bias Current -2 +2 µA

IFB Input Voltage Range

-1.7 +1.7

IFB Regulation Point

380 400 420

IFB Input Bias Current V

IFB

= 0.4V -2 +2 µA

IFB Lamp-Out Threshold LOT = REF

500 600 700

IFB to CCI Transconductance 1V < V

CCI

< 2.5V

100

µS

CCI Output Impedance 20 MΩ

ISEC Input Voltage Range -2 +2 V

ISEC Regulation Threshold

1.20 1.25 1.30

ISEC Input Bias Current V

ISEC

= 1.25V -2 +2 µA

VFB Input Voltage Range -2 +2 V

VFB Input Bias Current V

VFB

= 0.5V

-0.5 +0.5

µA

VFB Regulation Point

490 510 530

VFB to CCV Transconductance 1V < V

CCV

< 2.7V 40 µS

VFB Zero-Voltage Crossing Threshold -10

+10

CCV Output Impedance 20 MΩ

Digital PWM Chopping Frequency

200 210 220

Lamp-Out Detection Timeout Timer V

IFB

< 0.1V (Note 1)

1.14 1.22 1.30

SDA, SCL, SUS Input Low Voltage 0.8 V

SDA, SCL, SUS Input High Voltage 2.1 V

SDA, SCL, SUS Input Hysteresis

300

SDA, SCL, SUS Input Bias Current -1 +1 µA

SDA Output Low Sink Current V

SDA

= 0.4V 4 mA

SCL Serial Clock High Period T

HIGH

4µs

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

4µs

SDA Valid to SCL Rising-Edge Setup Time,

Slave Clocking-In Data

SU:DAT

250

SCL Falling Edge to SDA Transition t

HD:DAT

0ns

SCL Falling Edge to SDA Valid,

Reading Out Data

700

1 2 3 4 5 6 7 8 ... 22 23

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX8709 Manual do Utilizador Página 3

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX8709