ISSUED DATE :2003/05/26
REVISED DATE :2004/10/05B
GDTL494
Description
V O LTA G E M O D E P WM C O N T R O L C I R C U I T
The GDTL494 incorporates all the functions required in the construction of a pulse-width modulation switching circuit. Designed
Primarily for switching power supply control or DC-DC convectors, it offers the systems engineer the flexibility to tailor control circuitry
to its own application.
*Complete PWM power control circuitry
*Uncommitted outputs for 200 mA sink or source current
*Output control selects single ended or push pull operation
*Internal circuitry prohibits double pulses over total range.
*Easy synchronization.
Features
Package Dimensions
REF.
A
A1
A2
b
b1
b2
b3
c
Millimeter
Min.
Max.
-
0.381
3.175
0.406
0.356
1.270
0.762
0.203
5.334
-
3.429
0.508
0.508
1.778
1.143
0.356
REF.
c1
D
E
E1
e
HE
L
S
Millimeter
Min.
Max.
0.203
18.92
6.096
7.493
2.413
8.509
3.175
0
0.279
19.69
6.604
8.001
2.667
9.525
3.683
15
Absolute Maximum Ratings
(Unless otherwise noted all is over operating free air temperature range)
PARAMETER
Supply Voltage (note1)
Amplifier Input Voltage
Collector output Voltage
Collector output Current
Continuous Total Dissipation at (or for below)
25 : free air Temperature(note 2)
Operating Temperature Range
Storage Temperature Range
Lead Temperature 1.6mm from Case for 60 Sec.
Vcc
Vi
Vo
Ico
P
D
Topr
Tstg
Tcase
SYMBOL
41
Vcc+0.3
41
250
1000
0 TO 70
-65 TO 150
300
VALUE
V
V
V
mA
mW
:
:
:
UNIT
Note1: All voltage values, except differential voltages are with respect to the network ground terminal.
Note2:For operation above 25 : free-air temperature, the dissipation derates with 9.2mW/ : .
1/5
GTM [ GTM CORPORATION ]
