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PDF KIA494AF Data sheet ( Hoja de datos )
| Número de pieza | KIA494AF | |
| Descripción | Voltage-Mode PWM Controller IC | |
| Fabricantes | KEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de KIA494AF (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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KEC
m
SEMICONDUCTOR
KIA494AP/AF
TECHNICAL DATA
BIPOLAR LINEAR INTEGRATED CIRCUIT
Voltage-Mode PWM Controller IC
The KIA494AP/AF incorporates on a single monolithic chip
all the functions required in the construction of a pulse-width-
modulation control circuit. Designed primarily for power supply
control, this device offers the systems engineer the flexibility to
tailor the power supply control circuitry to a specific application.
The KIA494AP/AF contains two error amplifiers, an on-chip
adjustable oscillator, a dead-tme control(DTC) comparator, a
pulse-steering control flip-flop, a 5-V, 5%-precision requlator,
and output-control circuits.
The error amplifiers exhibit a common-mode voltage range
from -0.3V to Vcc -2V. The dead-time control comparator has
a fixed offset that provides approximately 5% dead time.
The on-chip oscillator may be bypassed by terminating RT to
the reference output and providing a sawtooth input to CT,
or it may drive the common circuits in synchronous multiple-
rail power supplies.
The uncommitted output transistors provide either common-
emitter or emitter-follower output capability. The KIA494AP/AF
provides for push-pull or single-ended output operation, which
may 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.
Ju
DIM
A
B
D
d
G
H
MILLIMETERS
19.3± 0.2
6.45+0.2
1.52± 0.1
0.46± 0.1
0 . 5 0 MIN
3.8± 0.3
L 3.3± 0.3
P 2.54
T 0.25+0.1/-0.05
W 7.62
0 0 - 15-
DIP— 16
FEATURES
* Completed 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 Pulse at Either Output.
* Variable Dead Time Provides Control Over Total Range.
* Internal Regulator Provides a Stable 5V Reference Supply
With 5% Tolerance.
* Circuit Architecture Allows Easy Synchronization.
MAXIMUM RATINGS (Ta=25°C)
ITEM
SYMBOL RATING UNIT
Supply Voltage
Vcc 41 V
Error Amplifier Input Voltage
VlN
Vcc+0.3
V
Collector Output Voltage
Collector Output Current
Power
Consumption
KIA494AP
KIA494AF
V 0 41 V
Io 250 mA
750
PD mW
400
Operating Temperature
T 0 p r -40 — 85 °C
Storage Temperature
Tstg -65 — 150 °C
J U 1 Ld
fJU
H H H Hifl H H H"
H H H H! H H H H_
DIM
A
B1
B2
D
G
H
L
P
T
MILLIMETERS
9.88+0.2
3.94+0.2
6.00+0.3
0.4+0.1
0.15+0.1 /—0.05
1.63+0.2
0.65+0.2
1.27
0.20+0.1/-0.05
FLP-16
FUNCTION TABLE
INPUT TO
OUTPUT
OUTPUT FUNCTION
CTRL
Vi=GND Single-ended or paralled output
Vi=Vref Normal push-pull operation
1999. 2. 20
Revision No : 0
KEC
1/6
1 page  
TEST CIRCUIT
KIA494AP/AF
VCC = 15V
TEST INPUTS
OUTPUT 1
OUTPUT 2
Error Amplifier
vi O
Characteristics
>Amplifier Under Test
OFEEDBACK
7J77 Vref
OTHER Amplifier
Common—Emitter Configuration Test Circuit and Waveform
15V
Each Output
Circuit
-Output
II
77777
TEST CIRCUIT
NOTE A. CL includes probe and jig capacitance.
OUTPUT VOLTAGE WAVEFORM
Emitter—Follower Configuration Test Circuit and Waveform
Each Output
Circuit
15V
- Output
L J I C!
> CO
CO
TEST CIRCUIT
7^77
NOTE A. CL includes probe and jig capacitance.
OUTPUT VOLTAGE WAVEFORM
1999. 2. 20
Revision No : 0
KEC
5/6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet KIA494AF.PDF ] | |
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