kia494af Korea Electronics (KEC GROUP), kia494af Datasheet

kia494af

Manufacturer Part Number

kia494af

Description

Bipolar Linear Integrated Circuit Voltage-mode Pwm Controller Ic

Manufacturer

Korea Electronics (KEC GROUP)

Datasheet

1.KIA494AF.pdf (6 pages)

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1999. 2. 20

Voltage-Mode PWM Controller IC

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.

oscillator, a dead-tme control(DTC) comparator, a pulse-steering control

flip-flop, a 5-V, 5%-precision requlator, and output-control circuits.

to V

provides approximately 5% dead time.

reference output and providing a sawtooth input to CT, or it may drive

the common circuits in synchronous multiple-rail power supplies.

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.

being pulsed twice during push-pull operation.

FEATURES

MAXIMUM RATINGS (Ta=25 )

Supply Voltage

Error Amplifier Input Voltage

Collector Output Voltage

Collector Output Current

Power

Consumption

Operating Temperature

Storage Temperature

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.

The KIA494AP/AF incorporates on a single monolithic chip all

The KIA494AP/AF contains two error amplifiers, an on-chip adjustable

The error amplifiers exhibit a common-mode voltage range from -0.3V

The on-chip oscillator may be bypassed by terminating RT to the

The uncommitted output transistors provide either common- emitter or

The architecture of this device prohibits the possibility of either output

-2V. The dead-time control comparator has a fixed offset that

ITEM

KIA494AP

KIA494AF

Revision No : 0

SEMICONDUCTOR

TECHNICAL DATA

SYMBOL

opr

stg

RATING

-65 150

-40 85

250

750

400

+0.3

UNIT

FUNCTION TABLE

OUTPUT CTRL

BIPOLAR LINEAR INTEGRATED CIRCUIT

INPUT TO

=GND

ref

KIA494AP/AF

Single-ended or paralled output

Normal push-pull operation

FLP-16

DIP-16

OUTPUT FUNCTION

DIM

DIM MILLIMETERS

MILLIMETERS

0.25+0.1/-0.05

0.15+0.1/-0.05

0.20+0.1/-0.05

19.3 0.2

6.45 0.2

1.52 0.1

0.46 0.1

0.50 MIN

9.88 0.2

3.94 0.2

6.00 0.3

1.63 0.2

0.65 0.2

3.8 0.3

3.3 0.3

0.4 0.1

0 - 15

2.54

7.62

1.27

+ _

1/6

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kia494af Summary of contents

Page 1

... Internal Regulator Provides a Stable 5V Reference Supply With 5% Tolerance. Circuit Architecture Allows Easy Synchronization. MAXIMUM RATINGS (Ta=25 ) ITEM Supply Voltage Error Amplifier Input Voltage Collector Output Voltage Collector Output Current KIA494AP Power Consumption KIA494AF Operating Temperature Storage Temperature 1999 Revision TECHNICAL DATA SYMBOL RATING UNIT V 41 ...

Page 2

RECOMMENDED OPREATING 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 ELECTRICAL CHARACTERISTICS REFERENCE VOLTAGE UNIT CHARACTERISTIC Output Voltage ...

Page 3

ERROR AMPLIFIER CHARACTERISTIC Input Offset Voltage Input Offset Current Input Bias Current In-phase Input Voltage Range Open Load Gain Unity Gain Frequency Common-mode rejection Ratio Output Sink Current (Feedback) Output Source Current (Feedback) PWM COMPARATOR CHARACTERISTIC Input Threshold Voltage (Feedback) ...

Page 4

BLOCK DIAGRAM OSCILLATOR OFFSET DEAD TIME CONTROL 1 NON-INV INPUT + INV INPUT FEED BACK 13 (Note) PIN BECOMES SINGLE MODE AT "L" AND PUSH-PULL MODE AT "H" OPERATING WAVEFORM ...

Page 5

TEST CIRCUIT { TEST INPUTS 30K 0.001 F Error Amplifier Characteristics ref Common-Emitter Configuration Test Circuit and Waveform Each Output Circuit TEST CIRCUIT NOTE A. C includes probe and jig capacitance. L Emitter-Follower Configuration Test Circuit and ...

Page 6

R OSC 500k C =0.001uF T 100k 0.01uF 10k 0.1uF 1.0k 500 1.0k 5.0k 20k TIMING RESISTANCE CE(sat) 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 100 COLLECTOR CURRENT ...

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