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