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LC5540LF

Single-Stage Power Factor Corrected Off-Line Switching Regulators

Sanken Electric co.,ltd. 

LC5540LF

Series

Single-Stage Power Factor Corrected

Off-Line Switching Regulators

Electrical Characteristics of Control Part (MIC) 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

Operation Stop Voltage*

Circuit Current in Operation

Startup Circuit Operation Voltage

Startup Current

Startup Current Threshold Biasing

Voltage*

VCC(ON)

VCC(OFF)

ICC(ON)

VSTARTUP

ICC(STARTUP) VCC = 13 V

VCC(BIAS)

3–2

13.8

15.1

17.3

V

3–2

8.4

9.4

10.7

V

3–2

–

–

4.7

mA

1–2

18

21

24

V

3–2

−8.5

−4.0

−1.5

mA

3–2

9.5

11.0

12.5

V

Normal Operation

PWM Operation Frequency

Maximum On-Time

FB Pin Control Minimum Voltage

Maximum Feedback Current

Leading Edge Blanking Time

Quasi-Resonant Operation Threshold

Voltage-1

fOSC

tON(MAX)

VFB(MIN)

IFB(MAX)

tON(LEB)

VBD(TH1)

1–2

33

40

47

kHz

1–2

14

17.5

21

μs

5–2

0.50

0.85

1.20

V

5–2

–40

–25

–10

μA

4–2

−

600

−

ns

4–2

0.14

0.24

0.34

V

Quasi-Resonant Operation Threshold

Voltage-2

VBD(TH2)

4–2

0.11

0.16

0.21

V

Protected Operation

OCP Pin Overcurrent Protection

(OCP) Threshold Voltage

VOCP

4–2

−0.66

−0.60

−0.54

V

OCP Pin Source Current

OCP Pin Overvoltage Protection

(OVP) Operation Voltage

IOCP

VBD(OVP)

4–2

−120

−40

−10

μA

4–2

2.2

2.6

3.0

V

Overload Protection (OLP) Threshold

Voltage

VFB(OLP)

5–2

4.1

4.5

4.9

V

OVP Pin OVP Threshold Voltage

VCC Pin OVP Threshold Voltage

Thermal Shutdown Activating

Temperature

VOVP(OVP)

VCC(OVP)

TJ(TSD)

7–2

1.6

2.0

2.4

V

3–2

28.5

31.5

34.0

V

―

135

–

–

°C

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

LC5540LF-DS

3

SANKEN ELECTRIC CO., LTD.

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