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KIA494AP Datasheet Preview

KIA494AP Datasheet

Voltage-Mode PWM Controller IC

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KIA494AP pdf
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



KEC
KEC

KIA494AP Datasheet Preview

KIA494AP Datasheet

Voltage-Mode PWM Controller IC

No Preview Available !

KIA494AP pdf
KIA494AP/AF
RECOMMENDED OPERATING CONDITIONS
ITEM
Supply Voltage
Ampified Input Voltage
Collector Output Voltage
Output Current
(per one stage of output unit)
Current Into Feedback Terminal
Timing Capacitor
Timing Resister
Oscillation Frequency
Operating Temperature
SYMBOL
Vcc
VlN
V0
Io
Ifb
CT
RT
fosc
T0pr
MIN.
7
-0.3
-
-
-
0.47
1.8
1
-40
TYP.
-
-
-
-
-
-
-
-
-
MAX.
40
Vcc-2.0
40
200
0.3
10,000
500
300
85
UNIT
V
V
V
mA
mA
nF
kHz
°C
ELECTRICAL CHARACTERISTICS
REFERENCE VOLTAGE UNIT
CHARACTERISTIC
SYMBOL
Output Voltage
Vref
Input Stability
R e g IN
Load Stability
Output Voltage Temp. Change
Output Short-Circuit Current
Reg L
T c Vref
Is
TEST CONDITION
Iref—lrnA, Ta=25 °C
7V^VCC^40V,
Iref—lrnA, Ta=25°C
1mA ^ Iref ^ 10mA, Ta=25°C
-40°C^Ta^85°C, Iref=lmA
Vref=0
MIN.
4.75
-
-
-
-
TYP.
5.00
2
1
0.01
35
MAX.
5.25
25
15
0.03
-
UNIT
V
mV
%/°C
mA
OSCILLATION UNIT
CHARACTERISTIC
Oscillation Frequency Set Value
Oscillation Frequency Setting
Accuracy
Frequency Input Stability
Frequency Temp. Change
SYMBOL
TEST CONDITION
fosc
CT=0.001JUF, RT=30k£
fDIV
CT=0.001J[ZF, RT=30k£
fviN 7V^VCC^40V, Ta=25°C
fTa -45°C^Ta^85°C
MIN.
-
-
-
-
TYP.
40
3.0
0.1
1
MAX.
-
-
-
2
UNIT
kHz
%
PAUSE PERIOD ADJUSTING UNIT
CHARACTERISTIC
SYMBOL
TEST CONDITION
Input Bias Current
ILND O^Vin^5.25V PIN 4
Max. Duty (Each Output Stage) Dy MAX. VIN=0, CT=0.1//F, RT=12k£
Input Threshold Voltage 1
VTH-I
Output pulse 0% duty
Input Threshold Voltage 2
VTH-2
Output pulse max. duty
MIN.
-
45
-
0
TYP.
-2
-
2.8
-
MAX.
-10
-
3.3
-
UNIT
UA
%
V
1999. 2. 20
Revision No : 0
KEC
2/6


Part Number KIA494AP
Description Voltage-Mode PWM Controller IC
Maker KEC
Total Page 6 Pages
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KIA494AP pdf
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