ISL6842 Datasheet, PDF (2/9 Pages) Intersil Corporation – Improved Industry Standard Single Ended Current Mode PWM Controller

Functional Block Diagram
V _DD
GND
UVLO
COMPARATOR
+
VDD OK
-
BG ^+-
2.5 V
A
A=0.5
VREF
5.00 V
ENABLE
VREF FAULT -
+
V_REF
UV COMPARATOR
4.65V 4.80V
BG
CS
ERROR
AMPLIFIER
+
FB
-
COMP
RTCT
VREF
2.6V
0.7V
ON
OSCILLATOR
COMPARATOR
-
+
8.4mA
CLOCK
ON
100mV
PWM
COMPARATOR
+
-
2R
R
1.1V
CLAMP
ISL6844/5 ONLY
Q
T
Q
SQ
RQ
RESET
DOMINANT
P/N
-42, -44
-43, -45
UVLO ON/OFF
14.3 / 8.8V
8.4 / 7.2V
VREF
OUT