IL494D IK Semiconductor, IL494D Datasheet

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IL494D

Manufacturer Part Number
IL494D
Description
Manufacturer
IK Semiconductor
Datasheet

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IL494DT
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IL494N
IL494D
IL494DT
PWM Control Circuit
required in the construction of a pulse-width-modulation control circuit.
Designed primarily for power supply control, the IL494 contains an on-chip
5-volt regulator, two error amplifiers, adjustable oscillator, dead-time control
comparator, pulse-steering flip-flop, and output-control circuitry. The
uncommitted output transistors provide either common-emitter or emitter-
follower output capability. Push-pull or single-ended output operation may be
selected through the output-control function. The architecture of the IL494
prohibits the possibility of either output being pulsed twice during push-pull
operation.
FEATURE
Device
Output Control
The IL494 incorporates on a single monolithic chip all the functions
Complete PWM Power Control Circuitry
Uncommitted Outputs for 200 mA Sink or Source
Output Control Selects Single-Ended or Push-Pull Operation
Internal Circuitry Prohibits Double Pulse at Either Output
Internal Regulator Provides a Stable 5 V Reference Supply
Variable Dead-Time Provides Control Over Total Range
Grounded
At V
ref
Temperature Range
T
for all packages
A
FUNCTION TABLE
ORDERING INFORMATION
= -20 to 85 C
Operating
Single-ended or Parallel Output
Normal Push-Pull Operation
Output Function
Plastic
DIP-16
SOP-16
SOP-16
Package
LOGIC DIAGRAM
Tube
Tube
Tape& Reel
Shipping
PIN ASSIGNMENT
TECHNICAL DATA
July 2009, Ver.01
IL494

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IL494D Summary of contents

Page 1

... Internal Regulator Provides a Stable 5 V Reference Supply Variable Dead-Time Provides Control Over Total Range ORDERING INFORMATION Operating Device Temperature Range IL494N IL494D for all packages IL494DT FUNCTION TABLE Output Control Output Function Grounded Single-ended or Parallel Output At V Normal Push-Pull Operation ref Package Shipping Plastic ...

Page 2

MAXIMUM RATINGS Symbol V Supply Voltage CC V Amplifier Input Voltage I V Collector Output Voltage O Collector Output Current Tstg Storage Temperature RECOMMENDED OPERATING CONDITIONS Symbol V Supply Voltage CC V Amplifier Input Voltage I V Collector Output Voltage ...

Page 3

ELECTRICAL CHARACTERISTICS Symbol Parameter Reference Section V Output Voltage ref V Output regulation regin V Input regulation regout Output Voltage change with V ref temperature I Short-circuit output current SC (Note 1) Oscillator Section f Frequency OSC Standard deviation of ...

Page 4

ELECTRICAL CHARACTERISTICS Symbol Parameter PWM Comparator Section V Input threshold voltage THP (pin 3) I Input sink current (pin 3) I Switching Characteristics t Output voltage rise time rc t Output voltage fall time fc t Output voltage rise time ...

Page 5

Typical Application Pulse Width Modulated Step-down Converter IL494 July 2009, Ver.01 ...

Page 6

Parameter Measurement Information 1. Dead time and Feedback Control 2. Error Amplifier Characteristics 3. Common-Emitter Configuration 4. Emitter-Follower Configuration IL494 July 2009, Ver.01 ...

Page 7

Typical Performance Curves FIGURE 1 – OSCILLATOR FREQUENCY vs. TIMING RESISTANCE FIGURE 3 – PERCENT DEAD TIME vs.OSCILLATOR FREQUENCY FIGURE 2 – OPEN LOOP VOLTAGE GAIN AND PHASE vs. FREQUENCY FIGURE 4 – PERCENT DUTY CYCLE vs. DEAD-TIME CONTROL VOLTAGE ...

Page 8

FIGURE 5 – EMITTER-FOLLOWER CONFIGURATION OUTPUT-SATURATION VOLTAGE vs. EMITTER CURRENT FUGURE 7 – STANDBY-SUPPLY CURRENT vs. SUPPLY VOLTAGE FIGURE 6 – COMMON-EMITTER CONFIGURATION OUTPUT-SATURATION VOLTAGE vs. COLLECTOR CURRENT July 2009, Ver.01 IL494 ...

Page 9

0.25 (0.010 NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side ...

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