TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP FORM
(Y)
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(N)
0°C to 70°C
TL594CD
TL594ID
TL594CN
TL594IN
TL594Y
–40°C to 85°C
The D package is available taped and reeled. Add “R” suffix to device type (e.g.,
TL594CDR). Chip forms are tested at 25°C.
functional block diagram
OUTPUT CTRL
(see Function Table)
13
6
5
RT
CT
Oscillator
8
9
1D
C1
E1
DTC
Comparator
≈ 0.1 V
4
DTC
C1
11
10
PWM
Comparator
C2
E2
Error Amplifier 1
1
2
IN+
IN–
+
1
Pulse-Steering
Flip-Flop
–
12
Error Amplifier 2
+
V
CC
Undervoltage
Lockout
16
15
IN+
IN–
2
Control
–
Reference
Regulator
14
7
REF
3
FEEDBACK
GND
0.7 mA
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
