|
|
PDF AN002M2-29 Data sheet ( Hoja de datos )
| Número de pieza | AN002M2-29 | |
| Descripción | GaAs MMIC Control FET in SOT 143 DC-2.5 GHz | |
| Fabricantes | Alpha Industries | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AN002M2-29 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
D Complete PWM Power Control Circuitry
D Uncommitted Outputs for 200-mA Sink or
Source Current
D Output Control Selects Single-Ended or
Push-Pull Operation
D Internal Circuitry Prohibits Double Pulse at
Either Output
D Variable Dead Time Provides Control Over
Total Range
D Internal Regulator Provides a Stable 5-V
Reference Supply With 5% Tolerance
D Circuit Architecture Allows Easy
Synchronization
SLVS074B – JANUARY 1983 – REVISED JULY 1999
D, N, NS, OR PW PACKAGE
(TOP VIEW)
1IN+
1IN–
FEEDBACK
DTC
CT
RT
GND
C1
1
2
3
4
5
6
7
8
16 2IN+
15 2IN–
14 REF
13 OUTPUT CTRL
12 VCC
11 C2
10 E2
9 E1
description
The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control
circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the
power-supply control circuitry to a specific application.
The TL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC)
comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.
The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control
comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed
by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common
circuits in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The
TL494 provides for push-pull or single-ended output operation, which can be selected through the
output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice
during push-pull operation.
The TL494C is characterized for operation from 0°C to 70°C. The TL494I is characterized for operation from
–40°C to 85°C.
FUNCTION TABLE
INPUT TO
OUTPUT CTRL
OUTPUT FUNCTION
VI = GND
VI = Vref
Single-ended or parallel output
Normal push-pull operation
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1999, Texas Instruments Incorporated
1
1 page  
TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074B – JANUARY 1983 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, VCC = 15 V,
f = 10 kHz, TA = 25°C (unless otherwise noted)
reference section
PARAMETER
TEST CONDITIONS†
Output voltage (REF)
IO = 1 mA
Input regulation
VCC = 7 V to 40 V
Output regulation
Short-circuit output current‡
IO = 1 mA to 10 mA
REF = 0 V
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
‡ Duration of the short circuit should not exceed one second.
TL494Y
MIN TYP† MAX
5
2
1
25
UNIT
V
mV
mV
mA
oscillator section, CT = 0.01 µF, RT = 12 kΩ (see Figure 1)
PARAMETER
TEST CONDITIONS†
Frequency
Standard deviation of frequency§
All values of VCC, CT, RT, and TA constant
Frequency change with voltage
VCC = 7 V to 40 V
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
§ Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
N
+ Ǹȍ *+ (xn X)2
*s
n1
N1
TL494Y
MIN TYP†
10
100
1
UNIT
MAX
kHz
Hz/kHz
Hz/kHz
error-amplifier section (see Figure 2)
PARAMETER
TEST CONDITIONS
Input offset voltage
VO (FEEDBACK) = 2.5 V
Input offset current
VO (FEEDBACK) = 2.5 V
Input bias current
VO (FEEDBACK) = 2.5 V
Open-loop voltage amplification
∆VO = 3 V,
RL = 2 kΩ,
VO = 0.5 V to 3.5 V
Unity-gain bandwidth
VO = 0.5 V to 3.5 V,
RL = 2 kΩ
Common-mode rejection ratio
∆VO = 40 V
Output sink current (FEEDBACK)
VID = –15 mV to –5 V,
V (FEEDBACK) = 0.7 V
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
TL494Y
MIN TYP†
2
25
0.2
95
800
80
0.7
MAX
UNIT
mV
nA
µA
dB
kHz
dB
mA
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AN002M2-29.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AN002M2-29 | GaAs MMIC Control FET in SOT 143 DC-2.5 GHz | Alpha Industries |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |