NJM2367 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Fabricante

NJM2367

5.5A HIGH POWER DC/DC CONVERTER CONTROLLER IC

Japan Radio Corporation  

NJM2367

sTYPICAL APPLICATIONS

Step-Down Converter

*SBD

Vin

Cin

4

2

NJM2367

35

1

CF

L

SBD

Cout

Vout

R2

R1

RF

1) 5V and higher converter, the application must be connected R1 resistor according to above figure.

2) High current converter, the application must be placed Cin capacitor next to NJM2367, which avoid the

power-line fluctuation.

3) The sharp fluctuation of output load cause reverse voltage for inductance and over the supply-voltage for

SWOUT terminal. To avoid this problem, the application must be placed SBD between terminal 2 and 4.

sTIMING CHART

x

Oscillator

Compensation

ON

Switch output

OFF

ON

Current sense

OFF

y

z

ON

Thermal shutdown

{

OFF

1) The NJM2367 generate square waves. The PWM comparator generate PWM signals to compare square

waves and compensation voltage.

2) The switching duty is maximum 95%.

3) Over the 6.5A current, the output switch will be OFF to operate current limit protection. The NJM2367

sense the switching current of power transistor.

4) Over the 180°C (Tj), the switching will be OFF to operate thermal shutdown circuit.

-6-

Share Link: