APW7199 Ver la hoja de datos (PDF) - Anpec Electronics

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APW7199

High-Performance Step-Down PWM Controller with PFM

Anpec Electronics 

APW7199

Operating Waveforms

Refer to the typical application circuit. The test condition is VIN=19V, TA=25oC unless otherwise specified.

Enable at Zero Initial Voltage of V

OUT

Enable Before End of Soft-Stop

VEN/E X TRE F

1

V

OUT

2

VP H A S E

3

V

POK

4

V EN/E X TREF

1

2

VOUT

VPHASE

3

VPOK

4

CH1: VEN/EXTREF, 5V/Div, DC

CH2: VOUT, 1V/Div, DC

CH3: VPHASE, 20V/Div, DC

CH4: VPOK, 5V/Div, DC

TIME: 5ms/Div

CH1: VEN/EXTREF, 5V/Div, DC

CH2: VOUT, 1V/Div, DC

CH3: VPHASE, 20V/Div, DC

CH4: VPOK, 5V/Div, DC

TIME: 1ms/Div

Shutdown at I =20A

OUT

V

E N /E X TRE F

1

VOUT

V

PHASE

2

3

VPOK

4

CH1: VEN/EXTREF, 5V/Div, DC

CH2: VOUT, 1V/Div, DC

CH3: VPHASE, 20V/Div, DC

CH4: VPOK, 5V/Div, DC

TIME: 10µs/Div

Shutdown with Soft-Stop at No Load

V

E N /E X TRE F

1

VOUT

2

VPHASE

3

VPOK

4

CH1: VEN/EXTREF, 5V/Div, DC

CH2: VOUT, 1V/Div, DC

CH3: VPHASE, 20V/Div, DC

CH4: VPOK, 5V/Div, DC

TIME: 20ms/Div

Copyright © ANPEC Electronics Corp.

8

Rev. A.4 - Oct., 2010

www.anpec.com.tw

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