KA7577 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA7577

SMPS controller

Fairchild Semiconductor 

KA7577

Electrical Characteristics

(VCC = 18V, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Conditions

Min. Typ. Max. Unit

POWER SUPPLY VOLTAGE AND CURRENT SECTION

Power Supply Voltage

VCC

-

-

- 30 V

Operation Start-Up Voltage

VCC(START)

-

15.2 16.2 17.2 V

Operation Stop Voltage

VCC(STOP)

-

9.0 9.9 10.9 V

Difference Voltage Between

Operation Start and Stop

∆VCC

-

5.0 6.3 7.6 V

Stand-By Current

TA = 25°C, VCC = 14.5V

50 80 140 µA

ISB

TA = -30 to +85°C, VCC = 14.5V 40 80 160 µA

Operating Supply Current

ICC(OPR) VCC = 30V

13 15 21 mA

Supply Current at Non-Operating

ICC(OFF)

VCC = 25V

VCC = 14V

0.95 1.31 1.9 mA

50 80 120 µA

Supply Current at Timer Non-

Operating

ICC(CT)

VCC = 25V

VCC = 14V

0.95 1.35 2.0 mA

- 140 220 µA

Supply Current at OVP Operating ICC(OVP)

VCC = 25V

VCC = 9.5V

1.0 2.0 3.0 mA

125 190 290 µA

ON/OFF SECTION

ON/OFF Terminal High

Threshold Voltage

VTHH(ON/OFF)

-

2.1 2.6 3.1 V

ON/OFF Terminal Low Threshold

Voltage

VTHL(ON/OFF)

-

1.9 2.4 2.9 V

ON/OFF Terminal Hysteresis

Voltage

VHYS(ON/OFF)

-

0.1 0.2 0.3 V

DETECTION SECTION

Detection Voltage

V(DET)

-

2.4 2.5 2.6 V

Input Current of Detection

Voltage

II(DET)

V(DET) = 2.5V

- 1.0 3.0 µA

Voltage Gain of Detection Amp

GV(DET)

-

40 55 - dB

FEEDBACK SECTION

Current at Min Duty Cycle

IFB(MIND)

-

- 2.1 -1.54 -1.0 mA

Current at Max Duty Cycle

Current Difference Between Max

and Zero Duty Cycle

FB Terminal Voltage

FB Terminal Resistance

IFB(MAXD)

∆I (FB)

V(FB)

R(FB)

-

-

ISINK = - 0.95mA

V(DET) = 2.5V

- 0.9 - 0.55 - 0.4 mA

-1.35 - 0.99 - 0.7 mA

4.9 5.9 7.1 V

- 500 - W

3

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