NTE7154 データシートの表示（PDF） - NTE Electronics

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NTE7154

Integrated Circuit Control Circuit for Switch Mode Power Supplies using MOS Transistors

NTE Electronics 

Electrical Characteristics: (VCC = 10V, TA = +25°C unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Start–Up Hysteresis

Start–Up Current Drain

I6E0

Switch–On Voltage

V6E

Switch–Off Voltage

V6A

Switch–On Current

I6E1

Switch–Off Current

I6A1

Voltage Clamp (V6 = 10V, IC Switched Off)

At Pin2 (V6 < V6E)

V2(Max)

At Pin3 (V6 < V6E)

V3(Max)

Control Range

V6 = V6E

V6 = V6E

V6 = V6A

I2 = 1mA

I3 = 1mA

– 0.6 0.8 mA

11 12 13 V

4.5 5.0 5.5 V

– 11 – mA

– 10 – mA

5.6 6.6 9.0 V

5.6 6.6 9.0 V

Control Input Voltage

Voltage Gain of the Control Circuit in the

Control Range

V1R

400 410 420 mV

–VR VR = d(V2S – V2B)/dV1, f = 1kHz –

43

–

dB

Primary Current Simulation Voltage

Basic Value

VsB

Overload Range and Short Circuit Operation

0.955 1.000 1.030 V

Peak Value in the Range of Secondary

Overload

V2O V1 = V1R = 10mV

2.80 2.95 3.10 V

Maximum Ramp Amplitude

Peak value in the Range of Secondary

Short–Circuit Operation

DV2 V2O – V2B

V2S V1 = 0

1.82 1.95 2.08 V

2.3 2.5 2.7 V

Foldback Point Correction

Foldback Point Correction Current

–I2 V3 = 3.7V

Generally Valid Data (V6 = 10V) Voltage of the Zero Transition Detector

Positive Clamping Voltage

V8P I8 = 1mA

Negative Clamping Voltage

V8N I8 = –1mA

Threshold Voltage

V8S

Suppression of Transformer Ringing

TUL

300 500 650 µA

– 0.75 –

V

– –0.2 –

V

40 50 – mV

3.0 3.8 4.5 µs

Input Current

–I8

Push–Pull Output Stage Saturation Voltages

V8 = 0

0

–

4 µV

Pin5 Sourcing

Pin5 Sinking

Output Slow Rate

VSatU

VSatU

I5 = –0.1A

I5 = +0.1A

I5 = +0.5A

– 1.5 2.0 V

– 1.0 1.2 V

– 1.4 1.8 V

Rising Edge

Falling Edge

Reduction of Control Voltage

+dV5/dt

–dV5/dt

– 70 – V/µs

– 100 – V/µs

Current to Reduce the Control Voltage

–I1 V7 = 1V

– 50 – µA

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