FP6321 Ver la hoja de datos (PDF) - Unspecified

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FP6321

Synchronous Buck PWM DC-DC Controller

Unspecified 

fitipower integrated technology lnc.

Electrical Characteristics

(VCC=5V/12V, TA=25°C, unless otherwise specified)

Parameter

Symbol Conditions

INPUT

VCC Under Voltage Lockout

VRISING

VFALLING

VCC rising

VCC falling

Quiescent Current

ICC

UGATE and LGATE open

ERROR AMPLIFIER

Feedback Voltage

VFB

FB Input Bias Current

IFB

VFB=1V

Open Loop DC gain (Note2)

AO

OSCILLATOR

Frequency

Ramp Amplitude (Note2)

FOSC

△VOSC

VCC=12V

VCC=12V

GATE DRIVERS

Upper Gate Source

Upper Gate Sink

Lower Gate Source

Lower Gate Sink

Dead Time (Note2)

IUGATE

RUGATE

ILGATE

VBOOT-VPHASE=12V,

VUGATE-VPHASE=6V

VBOOT-VPHASE=12V,

VUGATE-VPHASE=1V

VCC=12V, VLGATE =6V

RLGATE VCC=12V, VLGATE =1V

TDT

PROTECTION

FB Under-Voltage Trip

OC Current Source

Soft-Start Interval (Note2)

Note2：Guarantee by design.

IOCSET

Tss

FB Falling

VPHASE=0V

FP6321

Min

Typ

Max Unit

3.7

4.1

4.5

V

0.25

V

2

6

mA

0.784 0.8 0.816 V

0.1

uA

85

dB

250

300

350 kHz

1.5

Vp-p

300

500

mA

4

8

Ω

300

500

mA

3

5

Ω

100

ns

70

75

80

%

35

40

45

uA

2

3.5

ms

FP6321-1.3 -FEB-2010

5

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