PQ1PF1 データシートの表示（PDF） - Sharp Electronics

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PQ1PF1

Primary Regulator for Switching Power Supply (50W Class)

Sharp Electronics 

Primary Regulators

Fig.20 Output-OFF Mode Consumption

Current vs. Junction Temperature

0.08

0.75

0.70

0.65

0.60

0.55

0.50

0.45

0.40

0.35

0.30

-25

VCC=18V,VCA=GND

VFB=OPEN,VDS=OPEN

0 25 50 75 100 125

Junction temperature Tj (˚C)

PQ1PF1

Fig.21 Operation Stopping Voltage vs.

Junction Temperature

9.40

VCA=GND

VFB=OPEN,VDS=OPEN

9.35

9.30

9.25

9.20

9.15

9.10

-25

0 25 50 75 100 125

Junction temperture Tj (˚C)

s Block Diagram

Overheat

detection

circuit

Overload cut-off

voltage circuit

FB

CA

VCC

←

Low voltage

malfunction

prevention circuit

Cut-off voltage

detecting circuit

OFF voltage

detecting circuit

OSC

R

Q

S

PWM

+

-

-

-

DET

VDS

Constant

voltage

source

Drive

circuit

Overcurrent

detection

circuit

GND

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