GL494 View Datasheet(PDF) - Hynix Semiconductor

Part Name

Description

Manufacturer

GL494

PWM CONTROL CIRCUIT

Hynix Semiconductor 

GL494

Parameter Measurement Information

1.Dead time and Feedback Control

Vcc=15V

TEST

DEAD TIME (4)

(8) C1

INPUTS

12kΩ FEEDBACK (3)

Re (6)

(9) E1

Cr (5)

(11) C2

0.01µF (+) (16) ERROR (12) E2

(-) (15) AMP

(+) (1) ERROR

50kΩ

(-) (2) AMP

OUTPUT

(14) REF

CONTROL GND (7) OUT

(13)

TEST CIRCUIT

150Ω

2W

150Ω

2W

OUTPUT 1

VOLTAGE

AT C1

VOLTAGE

AT C2

OUTPUT 2

VOLTAGE

AT CT

THRESHOLD VOLTAGE

DEAD-TIME

CONTROL

INTPUT

0V

THRESHOLD VOLTAGE

Vcc

0

Vcc

0

FEEDBACK 0.7V

0%

DUTY

MAX

MAX

0%

CYCLE

VOLTAGE WAVEFORMS

2. Error Amplifier Characteristics

V1

VREF

ERROR AMPLIFIER

+ UNDER TEST

FEEDBACK

TERMINAL

–

+

– OTHER

ERROR

AMPLIFIER

3. Common-Emitter Configuration

(EACH OUTPUT

CIRCUIT)

15V

68Ω

2W

OUTPUT

90%

90%

CL=15pF

(INCLUDES PROBE AND

JIG CAPACITANCE)

10%

tr

10%

tf

TEST CIRCUIT

OUTPUT VOLTAGE WAVEFORM

5

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