ISL97651 Intersil Corporation, ISL97651 Datasheet - Page 9

• Manufacturer Part Number: ISL97651
• Description: 4-Channel Integrated LCD Supply
• Manufacturer: Intersil Corporation

Block Diagram
V
IN1
, V
N
C
V
FBP
CM1
V
FBB
ENL
FBN
OUT
SUP
DEL
IN2
EN
INL
V
0.75 V
0.4V
0.2V
REF
V
UVLO COMPARATOR
0.75V
UVLO COMPARATOR
REF
REF
-
+
-
+
-
+
-
+
REF
-
+
-
+
CONTROL
NOUT
OSCILLATOR
VSUP
1.2MHz
VOLTAGE
FEEDBACK
9
C1-
C1+
FAULT CONTROL
COMPARATOR
REFERENCE
CONTROL
SEQUENCE
CURRENT
POUT
+
-
P
V
LIMIT
BIAS
AND
AND
OUT
REF
FIGURE 11. BLOCK DIAGRAM
CURRENT LIMIT
THRESHOLD
C2+
VSUP
ISL97651
THRESHOLDS
AND BIAS
C2-
CURRENT FEEDBACK
GENERATOR
SAWTOOTH
∑
DRN
SLOPE
COMPENSATION
BUFFER
CURRENT LIMIT
COMPARATOR
CONTROL
LOGIC
GENERATOR
CTL
SAWTOOTH
CONTROL
FEEDBACK
CURRENT
LOGIC
∑
SLOPE
COMPENSATION
P
BUFFER
OUT
CURRENT LIMIT
THRESHOLD
COMPARATOR
COM
VOLTAGE
FEEDBACK
UVLO
0.75 V
+
+
-
-
R
V
SENSE
REF
REF
March 15, 2007
PGND3
ACGND
DELB
PGND1
PGND2
CM2
LX1
LX2
CB
LXL
FBL
FN7493.2