MC33067DWR2G datasheet(7/16 Pages) ONSEMI

Teilenummer	MC33067DWR2G

Bauteilbeschribung	High Performance Resonant Mode Controllers

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MC34067, MC33067

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7

3

Figure 14. MC34067 Representative Block Diagram

12

Output B

13

14

8

7

Inverting Input

Oscillator

Control Current

16

9

8.0 V

Q2

R

RT

CT

ROSC

COSC

RVFO

Vref

4.9V/3.6 V

15

VCC

Enable /

UVLO Adjust

OSC Charge

OSC RC

One−Shot RC

Error Amp Output

Noninverting Input

Soft−Start

Ground

4

Fault Input

Power

Ground

Output A

Vref

D1

Q1

IOSC

Oscillator

One−Shot

Error Amp

Clamp

3.1V

Error Amp

9.0

mA

1.0 V

Q

T

Steering

Flip−Flop

4.2/4.0 V

Vref UVLO

VCC UVLO

7.0k

50k

7.0k

50k

4.9 V/3.6 V

Vref

5.1 V

Reference

1

2

6

11

5

10

Figure 15. Timing Diagram

5.1 V

3. 6 V

COSC

5.1 V

3.6 V

One−Shot

Output A

Output B

tOS

High State Error Amp output, minimum IOSC current

occurring at minimum input voltage, maximum load.

Low State Error Amp output, maximum IOSC current

occurring at maximum input voltage, minimum load.

Fault Comparator

IOSC

Fault

Latch

S

R

Q

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