NCP1397A Ver la hoja de datos (PDF) - ON Semiconductor

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NCP1397A

High Performance Resonant Mode Controller with Integrated High-Voltage Drivers

ON Semiconductor 

NCP1397A, NCP1397B

VDD

Vref

Rt

I = Imax for Vfb = 5.3 V

I = 0 for Vfb < Vfb(min)

Imin

VFB ≤ VFB(off)

+

−

C

IDT

+

DT Adj.

VDD

Fmax

VDD

Imax

VFB = 5

Vdd

Vref

Itimer1

Itimer2

Timer

+

−

+

Vref

Timeout

Fault

S

D

Q

Clk Q

R

50% DC

Temperature

Shutdown

Vref

FF

PON

Reset

Fault

Timeout

Fault

BO

Reset

Fast

Fault

Level

Shifter

SS(dis)

PON

Reset

Fault

Fault

VBOOT

Mupper

UVLO

HB

NC

VCC

FB

RFB

+

−

+

VFB(fault)

IDT

DT

VDD

IBO

G=1

+

−

> 0 only

VDD

V = V(FB) − VFB(min)

+

VFB(min)

20 ms Noise

Filter

Vref

Deadtime

Adjustment

Mlower

−

+

+

Vref Skip/Disable

GND

Skip/

Disable

20 ns Noise

Filter

BO

+

−

+

VBO

+

−

+

Vlatch

20 ms Noise

Filter

QQ

S

R

PON Reset

Fault

+

Vref(fault)

+

−

Vref(OCP)

+

−

+

1 ms Noise

Filter

Figure 2. Internal Circuit Architecture (NCP1397A)

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