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PDF UTCTL494 Data sheet ( Hoja de datos )
| Número de pieza | UTCTL494 | |
| Descripción | VOLTAGE MODE PWM CONTROL CIRCUIT | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UTCTL494 LINEAR INTEGRATED CIRCUIT
VOLTAGE MODE PWM CONTROL
CIRCUIT
DESCRIPTION
The UTC TL494 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.
SOP-16
FEATURES
*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
DIP-16
ABSOLUTE MAXIMUM RATINGS(Unless otherwise noted all is over operating free air temperature
range)
PARAMETER
Supply Voltage(note 1)
Amplifier Input Voltage
Collector Output Voltage
Collector Output Current
Continuous Total Dissipation at(or for below)
25°C Free Air Temperature(note 2)
Operating Temperature Range
Storage Temperature Range
Lead Temperature 1.6mm from Case for 60
Sec.
SYMBOL
VCC
VI
VO
ICO
PD
Topr
Tstg
Tcase
VALUE
41
VCC+0.3
41
250
1000
0 TO 70
-65 TO 150
300
UNIT
V
V
V
mA
mW
°C
°C
°C
note 1: All voltage values, except differential voltages are with respect to the network ground terminal.
note 2:For operation above 25°C free-air temperature, the dissipation derates with 9.2mW/°C.
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R103-004,A
1 page  
UTC TL494
LINEAR INTEGRATED CIRCUIT
ERROR
1 AMPLIFIER
Vin
2
FEEDBACK
TERMINAL
16
Vref 15
ERROR
AMPLIFIER
FIG 2. AMPLIFIER CHARACTERISTICS
Vcc
EACH
OUTPUT
CIRCUIT
Q
68Ω
15pF
90%
10%
tr
90%
Vc
10%
tf
FIG. 3 COMMON-EMITTER CONFIGURATION
PIN CONFIGURATIONS
NONINV
INPUT
1
INV INPUT 2
FEEDBACK 3
DEAD-TIME
CONTROL
4
CT 5
RT 6
GND
7
C1 8
EACH
OUTPUT
CIRCUIT Q
Vcc
90%
10%
68Ω 15pF
tr
90%
Ve
10%
tf
FIG. 4 EMITTER -FOLLOWER CONFIGURATION
16
NONINV
INPUT
15 INV INPUT
14 Vref
13
OUTPUT
CONTROL
12 Vcc
11 C2
10 E2
9 E1
UTC UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R103-004,A
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet UTCTL494.PDF ] | |
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