Rainbow Electronics MAX8709 - Manual (Page 10)

MAX8709
High-Efficiency CCFL Backlight
Controller with SMBus Interface
10 ______________________________________________________________________________________
SMBus
INTERF
ACE
BRIGHTNESS
DAC DPWM OSC RAMP
GENERA
TOR
PEAK
DETECTOR
SUPPL
Y
CONTROL
LOGIC
MUX
LAMP-OUT
COMP
GMV GMI
CCV CLAMP
PK_DET CLAMP
IMIN COMP IMAX COMP
LX1 LX2
0.5V 0.4V
6mV
400
µ
A
SEC OC COMP
PWM COMP
DPWM COMP
1.25V
MAX8709
SUS SDA SCL LOT
REF
CCV CCI ILIM
REF
IFB VFB
BA
TT
GND BST1 GH1 LX1 BST2 GH2 LX2 GL1 V DD GL2 PGND ISEC REF V CC
VIN
CCFL
Figure 2. MAX8709 Functional Diagram