Datasheet

TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038G − JANUARY 1989 − REVISED FEBRUARY 2008
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
functional block diagram
†
The toggle flip-flop is present only in TL2844, TL2845, TL3844, and TL3845.
Pin numbers shown are for the D (14-pin) package.
Internal
Bias
V
ref
Good
Logic
OSC
5-V REF
Error
Amplifier
PWM
Latch
Current-
Sense
Comparator
34 V NOM
V
CC
GND
RT/CT
VFB
COMP
ISENSE
12
9
7
3
1
5
14
11
10
8
REF
VC
OUTPUT
POWER
GROUND
+
−
UVLO
EN
2R
R1 V
S
R
T
†
+
−