AS1109_1 datasheet(7/26 Pages) AMSCO

Part #	AS1109

Description	Constant-Current, 8-Bit LED Driver with Diagnostics

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Manufacturer	AMSCO [ams AG]

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AS1109

Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s

7 Typical Operating Characteristics

Figure 3. Output Current vs. REXT,

Figure 4. Relative Output Current Error vs. VDD,

VDD = 5V; VOUT = 0.8V, TAMB = 25°C

Iout/Iout@VDD = 5V - 1, TAMB = 25°C

Figure 5. Output Current vs. VDS;

Figure 6. Output Current vs. VDS;

VDD = 5V, TAMB = 25°C

Figure 7. Relative IOUT Error vs. Temperature

Figure 8. Output Current vs. VDD

VDD = 5V, Iout/Iout@25°C - 1, TAMB = 25°C

1

10

100

1000

10000

REXT (Ohm)

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

33.5

44.5

55.5

VDD (V)

REXT = 744

Ω;

VDS = 0.5V

REXT = 372

Ω;

VDS = 0.6V

REXT = 186

Ω;

VDS = 0.8V

0

20

40

60

80

100

120

140

160

02

46

8

10

12

14

VDS (V)

REXT = 127

Ω

REXT = 251

Ω

REXT = 372

Ω

REXT = 150

Ω

REXT = 186

Ω

REXT = 744

Ω

0

20

40

60

80

100

120

140

160

0

0.2

0.4

0.6

0.8

1

1.2

1.4

VDS (V)

REXT = 127

Ω

REXT = 251

Ω

REXT = 372

Ω

REXT = 150

Ω

REXT = 186

Ω

REXT = 744

Ω

-1

-0.5

0

0.5

1

-50

-25

0

255075

100

Temperature (°C)

REXT = 372

Ω;

VDS = 0.6V

REXT = 744

Ω;

VDS = 0.5V

REXT = 186

Ω;

VDS = 0.8V

0

20

40

60

80

100

120

140

160

3

3.5

4

4.5

5

5.5

VDD (V)

VDS = 1V

VDS = 0.9V

VDS = 0.8V

VDS = 0.7V

VDS = 0.6V

VDS = 0.5V

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