Rainbow Electronics MAX17061 - Manual (Page 13)

MAX17061
8-String White LED Driver with
SMBus for LCD Panel Applications
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5V LINEAR
REGULATOR
OSCILLATOR
SLOPE
COMPENSATION
CLOCK
FB OVERVOLTAGE
COMPARATOR
ERROR
COMPARATOR
OUTPUT OVERVOLTAGE
COMPARATOR
OV
V DD
LX1, 2
PGND1, 2
ERROR
AMPLIFIER
CURRENT SOURCE
IN
FB1
GND
FB2
OV FAULT
CONTROL AND
DRIVER LOGIC
CURRENT SENSE
HVC FB6
FB5
FB4
FB3
FB2
LVC
3-LEVEL
COMPARATOR
gm
FB7
FB8
EN
V
CC
OSC
REF ADJ
REF
V
CC
+ 0.6V
1.236V
ISET
PWMI
PWMO
A
MUX
0x03
D
"1"
"< = 1"
SCL
SMBus
INTERFACE
8-BIT D/A
VSAT
DPWM SIGNAL GENERATOR
DPWM
SETTING
WLED
ON/OFF
CURRENT SOURCE
SDA
FSET
CCV
V CC
FB3 CURRENT SOURCE
FB4 CURRENT SOURCE
FB5 CURRENT SOURCE
FB6 CURRENT SOURCE
FB7 CURRENT SOURCE
FB8 CURRENT SOURCE
10 Ω
MAX17061
0x02 0x01 0x00
MUX
PWM_SEL
PWM_MD
DIMMING
BLOCK DIAGRAM
Figure 2. Control Circuit Block Diagram