VER.A5 2019.07 Page

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General test conditions: Free-air, normal operating temperature range (unless otherwise specified).

Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Bias mains voltage

VVDD

35

V

Voltage of the GATE pin

VDRV

-0.6

30

V

Voltage range

UVP,FB,CS,RI

-0.6

6

BOS

-0.6

30

Storage temperature

TSTG

-40

150

℃

Operating junction temperature

TJ

-40

150

Lead temperature for soldering

0.6mm from case for 10s

260

Rated value of electrostatic discharge (ESD)

Human body model (HBM)

-2000

2000

V

Charging device model (CDM)

-1000

1000

Important: Exposure to Absolute Maximum Rated conditions for an extended period may severely affect the device reliability, and stress levels exceeding the “Absolute

Maximum Ratings” may result in permanent damage.

Recommended Operating Conditions

Parameter

Symbol

Min

Max

Unit

Bias mains voltage

VDD

8

25

V

VDD bypass capacitance

CVDD

0.47

20

uF

Maximum operating switching frequency

FSW

65

100

kHz

Operating junction temperature

TJ

-40

125

℃

Electrical Characteristics

General test conditions and VDD = 12V, GATE with no load (unless otherwise specified).

Symbol

Parameter

Test condition

Mini

Typ

Max

Unit

Chip power supply (VDD pin)

ISTARTUP

VDD starting current

VVDD<VVDD off, current flowing

into the VDD port

150

300

450

uA

IVDD_OP

Chip’s operating current

VFB=3V, RI=24K

1.5

2.5

3.5

mA

VUVLO_ON

VDD undervoltage lockout

cancellation

(enable)

VVDD: increasing

14.8

16.1

17.4

V

VUVLO_OFF

VDD undervoltage lockout

VVDD: decreasing

6.8

7.4

8

V

VOVP_ON1

VDD overvoltage protection

trigger voltage

VVDD:15V~21V

FB=4V

22.3

24.2

26.2

V

VOVP_OFF

VDD overvoltage protection

recovery voltage

VVDD: 21V~10V

FB=1-4V

14.8

16.1

17.4

V

VOVP_HYS

VDD overvoltage protection

backlash voltage

8.1

V

VCLAMP

VDD clamping voltage

Sudden improvement of the

current absorption capability

of VDD

30

35

40

V

Feedback voltage input (FB pin)

AV_CS

PWM input gain

△

VFB/△VCS

2.75

V/V

VFB_OPEN

FB open-circuit voltage

5.37

V

IFB_SHORT

FB short-circuit current

FB grounding current

0.9

1.2

1.5

mA

VBURST_ON

Frequency modulation mode

entry level

VFB voltage increasing

1.25

V

VBURST_OFF

Frequency modulation mode exit

level

VFB voltage decreasing

1.65

V

VTH_PL

FB threshold voltage during

power limitation

4.55

V

Oscillator parameter（RI pin）

FOSC

Oscillator frequency

RI=24K

90.8

KHz

DMAX

Maximum duty ratio

76

80

84

%

AJITTER

Frequency jittering amplitude

RI=24K

86

90

95

KHz

FJITTER

Frequency jittering trimming

period

RI=24K

5

6

8

mS

FMIN1

Minimum operating frequency

during start

RI=24K

23.9

kHz

FMIN2

Minimum operating frequency

during steady output

RI=24K

23.9

kHz

RI_RANGE

RI change range

15

24

48

KΩ

VRI_OPEN

RI open-circuit voltage

2

V

Current detection input (CS pin)

VCST_MAX

Internal current limiting

0.8

V

TBLANKING

Leading edge blanking time,

RI=24K

External

-

nS

SCOMP1

Slope compensation

RI=24K,

D∈(40%-60%)

33

mV/uS

SCOMP2

Slope compensation

RI=24K,

58

mV/uS