2/4

REV. B

○Electric Characteristics（Ta=25℃、VCC=12V、STB=3.0V）

Item

SYMBOL

LIMIT

UNIT

CONDITION

MIN.

TYP.

MAX.

(（WHOLE DEVICE）)

Operating current

Icc1

－

2.0

4.0

mA

RT=100kΩ, FB=GND, IS=1.5V

Stand-by current

Icc2

－

0

20

μA

VSTB=0V

((STAND BY CONTROL））

Stand-by voltage H

VSTBH

2

-

VCC

V

System ＯＮ

Stand-by voltage L

VSTBL

-0.3

-

0.8

V

System ＯＦＦ

STB PIN pull down resistor

RSTB

180

375

750

kΩ

VSTB=2V

（（VCC UVLO BLOCK））

）

Operating voltage

VCC_UVLO

7.2

7.5

7.8

V

VCC=6V→8V sweep

Hesteresis width

⊿UVLO_HYS

0.3

0.5

0.7

V

VCC=8V→6V sweep

（（OSC BLOCK）

）

RT pin Voltage

VRT

1.300

1.500

1.700

V

RT=100kΩ

SRT ON resistance

RSRT

－

75

150

Ω

VSRT=0.1V

((PWM Dimming Block))

PWM_IN PIN voltage H

VPWMIN_H

2.4

-

5

V

VPWM_IN=0V⇒3.0V

PWM_IN PIN voltage L

VPWMIN_L

-0.3

-

0.8

V

VPWM_IN=3.0V⇒0V

PWM_IN PIN pull down resistor

R_PWMIN

1000

2000

4000

kΩ

VPWM_I=5V

（（FEED BACK BLOCK））

IS threshold voltage

VIS

1.225

1.250

1.275

V

VS threshold voltage

VVS

1.200

1.250

1.300

V

IS source current

IIS

16

20

24

μA

IS=1.0V

IS COMP detect voltage

VISCOMP

0.565

0.625

0.685

V

IS=1.3V→0.5V

（（SLOW START BLOCK））

SS term END Voltage

VSS

2.400

2.500

2.600

V

VSS=0V⇒3V

Soft start current

ISS

1.7

2.0

2.3

μA

VSS=1.0V IS=1.5V

（（COMP BLOCK））

COMP over voltage

detect voltage

VCOMPH

1.900

2.000

2.100

V

VSS＞2.5V VCOMP=1.5V→2.5V

Hysterisis width (COMP)

⊿VCOMPH

0.100

0.200

0.300

V

VSS＜2.0V VCOMP=2.5V→1.5V

COMP PIN pull down resistor

RCOMP

1000

2000

4000

kΩ

COMP=5V

FAIL ON resistance

RFAIL

－

75

150

Ω

VFAIL=0.1V

（（OUTPUT BLOCK））

N1,N2 PIN output

sink resistance

RsinkN

1.5

3.0

6.0

Ω

IIN=100mA

N1,N2 PIN output

source resistance

RsourceN

4.5

9

18

Ω

IIN=-100mA

MAX DUTY

MAX DUTY

45

47.0

49.5

%

FOUT=50kHz

Drive output frequency

FOUT

48.25

50

51.75

kHz

RT=100kΩ

（（TIMER BLOCK））

Timer Latch setting voltage

VCP

2.900

3.000

3.100

V

VCP=0V⇒3.2V

Timer Latch setting current

ICP

1.7

2.0

2.3

μA

CP=1.0V IS=1.5V COMP=3.0V

（This product is not designed to be radiation-resistant.）