FL7740 datasheet(5/14 Pages) ONSEMI

Part #	FL7740

Description	Constant-Voltage Primary-Side-Regulation PWM Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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FL7740

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ELECTRICAL CHARACTERISTICS

VDD = 18 V and TJ = -40 ~ 125°C unless otherwise specified

Parameter

Test Conditions

Symbol

Min

Typ

Max

Unit

VDD Section

Turn-On Threshold Voltage

VDD-ON

14.5

16.0

17.5

V

Turn-Off Threshold Voltage

VDD-OFF

6.75

7.75

8.75

V

Operating Current

CLOAD = 1 nF, VDD = 18V

IDD-OP

3

5

6.5

mA

Operating Current during Auto Restart

IDD-AR

0.3

1

mA

VDD Over-Voltage-Protection

VDD-OVP

24

25

26

V

VBIAS Voltage

VBIAS

4.85

5.00

5.15

V

GATE Section

Output Voltage Low

VOL

0.2

V

Output Voltage High

VDD = 18 V

VOH

17.8

V

Peak Sourcing Current

Design guaranteed

CLOAD = 1 nF, VDD = 20 V

CLOAD = 1 nF, VDD = 23 V

Isource

180

210

mA

Peak Sinking Current

Design guaranteed

CLOAD = 1 nF, VDD = 20 V

CLOAD = 1 nF, VDD = 23 V

Isink

385

435

mA

Rising Time

CLOAD = 1 nF

tr

110

150

190

ns

Falling Time

CLOAD = 1 nF

tf

40

60

80

ns

HV Section

Supply Current From HV Pin

VHV = 560 V, VDD = 0 V

IHV

3

9

mA

Leakage Current after Startup

IHV-LC

1

10

μA

JFET Regulation Time at Startup

Design guaranteed

tR-JFET

400

500

600

ms

VDD High Limit during JFET Regulation

VDD-JFET-HL

17.5

19.0

20.5

V

VDD Low Limit during JFET Regulation

VDD-JFET-LL

15.5

17.0

18.5

V

PWM Section

Min. Turn-on Time Min. Limit

Design guaranteed

TON-MIN-MIN

0.40

μs

Min. Turn-on Time Max. Limit

Design guaranteed

TON-MIN-MAX

2.0

μs

Max. Turn-on Time

Design guaranteed

TON-MAX

23.3

μs

Oscillator Section

Max. Frequency

fMAX

60

65

70

kHz

Min. Frequency

fMIN

0.72

0.80

0.88

kHz

Current Sense Section

Leading-Edge Blanking Time

Design guaranteed

tLEB

300

ns

Propagation Delay to GATE

Design guaranteed

tPD

50

100

150

ns

Voltage Sense Section

tDIS Blanking Time at VS Sampling

Design guaranteed

tDIS-BNK

0.95

1.00

1.05

μs

VS Clamping Voltage

IVS=1 mA

IVS=10 µA

VVS-CLAMP

-0.1

0.35

V

Feedback Section

Reference voltage

VREF

3.465

3.5

3.535

V

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