FP6795MPPTR datasheet(2/9 Pages) FITIPOWER

tên linh kiện	FP6795MPPTR

Giải thích chi tiết về linh kiện	Low-Noise Boost DC-DC Converter

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FP6795-1.5-FEB-2012

FP6795

09A

85T

fitipower integrated technology lnc.

Typical Application Circuit

COMP

GND

FREQ

SHDN

FP6795

VIN

ON/OFF

VIN

VOUT

0.1µF

4.7µH

22µF

0.033µF

120K

1000pF

47pF

43K

390K

10µF

0.1µF

22µF

3.3V

Figure 2. Typical Application Circuit of FP6795

VIN (V)

VOUT (V)

fOSC (kHz)

L (µH)

COUT (µF)

R3 (k

Ω)

C4 (pF)

C6 (pF)

IOUT(MAX) (mA)

3.3

12.5

640

10 (TDK SLF7045)

33 (Ceramic)

120

1000

300

3.3

12.5

1200

6.8 (TDK SLF7045)

33 (Ceramic)

200

680

300

Functional Pin Description

Pin Name

Pin Function

COMP

Compensation Pin for Error Amplifier.

Connect a series RC from COMP to ground.

Feedback Pin.

The typical reference voltage is 1.24V.

Set VOUT = 1.24V (1+ R1/R2).

See Figure 2.

Enable Pin.

Connect

SHDN low to turn off FP6795.

GND

Ground.

Switching Pin.

Power Input Pin.

FREQ

Frequency Select Pin.

When FREQ is connected to ground, the frequency is 640kHz.

When FREQ is

connected to VIN, the frequency is 1.2MHz.

Soft-Start Control Pin.

Connect a capacitor (C3) to this pin.

The pin will source 4

μA constant current to charge

the capacitor.

Leave this pin floating for not using soft-start.

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