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PDF TL494 Data sheet ( Hoja de datos )
| Número de pieza | TL494 | |
| Descripción | VOLTAGE MODE PWM CONTROL CIRCUIT | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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 1. PWM Control Circuit - Motorola  Hay una vista previa y un enlace de descarga de TL494 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
TL494
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.
FEATURES
* Complete PWM power control circuitry
* Uncommitted outputs for 200mA sink or source current
* Output control selects single ended or push pull operation
* Internal circuitry prohibits double pulses over total range
* Easy synchronization
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
TL494L-D16-T
TL494G-D16-T
TL494L-P16-R
TL494G-P16-R
TL494L-P16-T
TL494G-P16-T
TL494L-S16-R
TL494G-S16-R
TL494L-S16-T
TL494G-S16-T
Package
DIP-16
TSSOP-16
TSSOP-16
SOP-16
SOP-16
Packing
Tube
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 8
QW-R103-004. I
1 page  
TL494
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
AMPLIFIER SECTION
Input Offset Voltage
Error VI(OFF) VOUT (pin 3)=2.5V
2 10 mV
Input Offset Current
II(OFF) VOUT (pin 3)=2.5V
25 250 nA
Input Bias Current
II(BIAS) VOUT (pin 3)=2.5V
0.2 1 μA
Common-Mode Input Voltage Range Error
VCC=7V ~ 40 V
-0.3 ~
VCC-2
V
Open-Loop Voltage Amplification
VOUT=3V, VOUT=0.5V ~ 3.5V
70 95
dB
Unity-Gain Bandwidth
GBW
800 kHz
Common-Mode Rejection Ratio
Error CMRR VCC=40V,TA=25C
65 80
dB
Output Sink Current(pin 3)
IO(SINK) VID=-15mV ~ -5V, V(pin 3)=0.5V 0.3 0.7
mA
Output source Current(pin 3)
IO(SOURCE) VID=15mV ~ -5V, V(pin 3)=3.5V -2
mA
OUTPUT SECTION
Collector off-state current
Emitter off-state Current
Collector -emitter
Common-emitter
Saturation Voltage
Emitter-Follower
Output Control Input Current
IC(OFF)
IE(OFF)
VCE=40V, VCC=40V
VCC=VC=40V, VE=0
VE=0, IC=200mA
VC=15V, IE=-200mA
VIN=VREF
2 100 μA
-100 μA
1.1 1.3 V
1.5 2.5
3.5 mA
DEAD TIME CONTROL SECTION
Input bias (pin 4)
Maximum duty cycle, each output
Input threshold Voltage(pin 4)
II(BIAS)
VTHR
VIN=0 ~ 5.25V
VIN(pin 4)=0
Zero duty Cycle
Maximum duty cycle
-2 -10 μA
45 %
3 3.3 V
0
PWM COMPARATOR SECTION
Input Threshold Voltage(pin 3)
Input Sink Current (pin 3)
VTHR Zero Duty cycle
II(SINK) V(pin 3)= 0.7V
4 4.5 V
0.3 0.7
mA
TOTAL DEVICE
Standby Supply Current
Average supply current
VCC =15V
VCC =40V
IST-BY
pin 6 at VREF, all other Inputs and
outputs open
V(pin 4)=2V
6 10 mA
9 15
7.5 mA
SWITCHING CHARACTERISTICS, TA=25C
Output Voltage Rise Time
Output Voltage Fall Time
tR
tF
Common-emitter configuration
100 200 ns
25 100 ns
Output Voltage Rise Time
Output Voltage Fall Time
tR
tF
Emitter-follower configuration
100 200 ns
40 100 ns
Notes: 1. All typical Values except for temperature coefficient are at TA=25C.
2. For conditions shown as MIN or MAX, use appropriate value under recommended operating conditions.
3. Duration of the short-circuit should not exceed one second.
4. Standard deviation is a measure of the statistical distribution the mean as derived from the formula:
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 8
QW-R103-004. I
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TL494.PDF ] | |
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