ISL6722A Datasheet, PDF (2/24 Pages) Intersil Corporation – Flexible Single Ended Current Mode PWM

ISL6722A, ISL6723A
Functional Block Diagram (ISL6722A)
V_CC
LGND
SLEEP
ISET
ISENSE
5k
START/STOP
UV COMPARATOR
V_REF
5V
+
ENABLE
-
BG ^+-
RESTART
DELAY
0.8
SS CHARGE
VOLTAGE CLAMP
SS CHARGED
VREF
+
S
53µA _{+ 100mV}
- OC DETECT
+
OVERCURRENT
COMPARATOR
SHTDN
SOFT-START
CHARGE
CURRENT _70µA
ON
OC
FAULT
OC
25µA
+
-
4.375V
SS DCHG ON
OVERCURRENT
SHUTDOWN
DELAY
SS CHG
SLOPE
0.1
COMP
SS
SS CLAMP
+
-
VFB
ERROR
2.5V AMPLIFIER
+
-
PWM
COMPARATOR
+
-
1/3
100ns START
BLANKING
SS LOW -
+
SS LOW 270mV
FAULT ^COMPARATOR
LATCH
SQ
RQ
SET DOMINANT
VREF
VREF
UV COMPARATOR
4.65V _-
+
BG
VREF
SS
15µA
VREF
20k
3.0V/
1.5V ^12k
ON
30k
OSCILLATOR
COMPARATOR
-
+
1mA
ON
BLANKING
COMPARATOR
3.0V
-
+
+
OV
-
2.50V
-
UV
+
1.45V
SQ
V_C
RQ
GATE
36k
PGND
2
FN9237.1
July 11, 2007