Data Sheet
AZ3842/3/4/5
Advanced Analog Circuits
CURRENT MODE PWM CONTROLLER
Functional Block Diagram
V
V
V
(PWR V )
CC C
CC
7(11)
8(14)
7(12)
5(9)
34V
UVLO
5V
REF
S/R
REF
GND
INTERNAL
BIAS
2.50V
VREF
GOOD
LOGIC
6(10) OUTPUT
4(7)
OSC
T
R /C
T
T
(Note)
OVER TEMP
PROTECT
GND
5(8)
(PWR GND)
ERROR
AMP
S
R
2R
V
2(3)
1(1)
FB
PWN
LATCH
A(B)
A for 8-pin
B for 14-pin
1V
R
CURRENT
SENSE
COMP
Note: Toggle flip-flop used
for 3844/45 only
3(5)
COMPARATOR
I
SENSE
Figure 3. Functional Block Diagram of AZ3842/3/4/5
Ordering Information
Package
Temperature Range
Part Number
Marking ID
Packing Type
SOIC-8
DIP-8
SOIC-14
AZ3842/3/4/5M
AZ3842/3/4/5P
AZ3842/3/4/5MM
3842/3/4/5M
AZ3842/3/4/5P
AZ3842/3/4/5MM
Tape/Reel/Tube
Tube
o
o
-40 C~85 C
Tape/Reel
March 2003
Rev: 1.0
3
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
