NCP1411 Ver la hoja de datos (PDF) - ON Semiconductor

Número de pieza

componentes Descripción

Fabricante

NCP1411

Sync-Rect PFM Step-Up DC-DC Converter with Low-Battery Detector and Ring-Killer

ON Semiconductor 

NCP1411

along the path. Feedback signal path must be separated with

the main current path and sensing directly at the anode of the

output capacitor.

Components Placement

Power components, i.e. input capacitor, inductor and

output capacitor, must be placed as close together as

possible. All connecting traces must be short, direct and

thick. High current flowing and switching paths must be

kept away from the feedback (FB, pin 1) terminal to avoid

unwanted injection of noise into the feedback path.

Feedback Network

Feedback of the output voltage must be a separate trace

detached from the power path. External feedback network

must be placed very close to the feedback (FB, pin 1) pin and

sensing the output voltage directly at the anode of the output

capacitor.

VBATT

RLB1

225 k

CIN +

10 mF/10 V

GND

CEN

120 nF

RLB2

330 k

RFB1

335 k

CFB2

220 pF

RFB2

200 k

CFB1

150 pF

L 22 mH

NCP1411

1

8

FB

OUT

2

7

LBI/EN

LX

3

6

LBO

GND

4

5

REF

BAT

CREF

150 nF

VOUT

+

COUT

33 mF/10 V

GND

Figure 28. Typical Application Schematic for 2 Alkaline Cells Supply

http://onsemi.com

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