ISL1903 datasheet(10/19 Pages) RENESAS

Il numero della parte	ISL1903

Spiegazioni elettronici	Dimmable Buck LED Driver - AC Mains or DC Input LED Driver

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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10 / 19 page

ISL1903

FN8285 Rev 1.00

Page 10 of 19

September 20, 2012

EA Reference vs AC Conduction Angle

ILPOUT = 0µA, f = 120Hz (rectified),

8V < VDD< 26V

Duty Cycle (

) = 98%

523

548

574

mV

Duty Cycle (

) = 75%

286

318

340

mV

Duty Cycle (

) = 50%

117

139

156

mV

Duty Cycle (

) = 25%

16

33

44

mV

Duty Cycle (

) = 10%

0

3

11

mV

DHC

Low Level Output Voltage (VOL)

VDHC = 10mA,

VDD = 8V operating

--

600

mV

Turn-off Delay after AC Returns

-

4.0

-

µs

SOFT-START

Duration

289

389

483

ms

Reference Soft Start Initial Step

11

27

43

mV

OFFREF

Input Bias Current

-1.0

-

1.0

µA

Operating Range (Excluding Offset)

0

-

0.5

V

Threshold Hysteresis

33

52

70

mV

Threshold Offset

78

104

129

mV

AC Dropout Disable Delay

-

32

ms

OUT

High Level Output Voltage (VOH)

VOUT @ 0mA - VOUT @ -100mA,

VDD = 8V operating

-

0.35

1.2

V

Low Level Output Voltage (VOL)

VOUT @ 100mA, VDD = 8V operating

-

0.7

1.2

V

Rise Time

CLOAD = 2.2nF, VDD = 8V,

t90% - t10%

-

35

55

ns

Fall Time

CLOAD = 2.2nF, VDD = 8V,

t10% - t90%

-

25

40

ns

Output Clamp Voltage

VDD = 20V, ILOAD = -10µA

10.5

12.0

13.4

V

Unbiased Output Voltage Clamp

VDD = 6V, ILOAD = 5mA

-

1.9

V

PWMOUT

High Level Output Voltage (VOH)

VOUT @ 0mA - VOUT @ -10mA,

VDD = 8V operating

-

0.8

1.2

V

Low Level Output Voltage (VOL)

VOUT @ 10mA,

VDD = 8V operating

-

0.8

1.2

V

Rise Time

CLOAD = 1nF, VDD = 8V operating,

t90% - t10%

-

160

240

ns

Fall Time

CLOAD = 1nF, VDD = 8V operating,

t10% - t90%

-

160

240

ns

Output Voltage Clamp

VDD = 20V, ILOAD = -10µA

10.5

12.0

13.4

V

Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram -

ISL1903” on page 2 and “Typical Application schematics” beginning on page 3. VDD = 17V, RRAMP = 54k, CRAMP = 470pF, TA = -40°C to

+125°C, Typical values are at TA = +25°C; Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)

PARAMETER

TEST CONDITIONS

MIN

(Note 7)

TYP

MAX

(Note 7)

UNITS

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