LC554XLF datasheet(3/13 Pages) SANKEN

3 / 13 page

Electrical Characteristics of Control Part Unless specifically noted, TA is 25°C, VCC = 20 V

Characteristic

Symbol

Test Conditions

Pins

Min.

Typ.

Max.

Unit

Power Supply Startup Operation

Operation Start Voltage

VCC(ON)

3 – 2

13.8

15.1

17.3

Operation Stop Voltage*

VCC(OFF)

3 – 2

8.4

9.4

10.7

Circuit Current in Operation

ICC(ON)

3 – 2

–

4.7

Startup Circuit Operation Voltage

VSTARTUP

1 – 2

Startup Current

ICC(STARTUP) VCC = 13 V

3 – 2

−8.5

−4.0

−1.5

Startup Current Threshold Biasing

Voltage*

VCC(BIAS)

3 – 2

9.5

11.0

12.5

Normal Operation

PWM Operation Frequency

fOSC

1 – 2

kHz

Maximum On-Time

tON(MAX)

1 – 2

17.5

μs

FB Pin Control Minimum Voltage

VFB(MIN)

5 – 2

0.50

0.85

1.20

Maximum Feedback Current

IFB(MAX)

5 – 2

–40

–25

–10

μA

Leading Edge Blanking Time

tON(LEB)

4 – 2

−

600

−

Quasi-Resonant Operation Threshold

Voltage-1

VBD(TH1)

4 – 2

0.14

0.24

0.34

Quasi-Resonant Operation Threshold

Voltage-2

VBD(TH2)

4 – 2

0.11

0.16

0.21

Protection Operation

OCP Pin Overcurrent Protection

(OCP) Threshold Voltage

VOCP

4 – 2

−0.66

−0.60

−0.54

OCP Pin Source Current

IOCP

4 – 2

−120

−40

−10

μA

OCP Pin Overvoltage Protection

(OVP) Operation Voltage

VBD(OVP)

4 – 2

2.2

2.6

3.0

Overload Protection (OLP) Threshold

Voltage

VFB(OLP)

5 – 2

4.1

4.5

4.9

OVP Pin OVP Threshold Voltage

VOVP(OVP)

7 – 2

1.6

2.0

2.4

VCC Pin OVP Threshold Voltage

VCC(OVP)

3 – 2

28.5

31.5

34.0

Thermal Shutdown Activating

Temperature

TJ(TSD)

―

135

–

°C

*VCC(BIAS) > VCC(OFF) always.

January 28, 2013

SANKEN ELECTRIC CO., LTD.

LC5540LF-DS

Single-Stage Power Factor Corrected

Off-Line Switching Regulator ICs

LC5540LF

Series

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