LED Driver PR4403

Electrical Characteristics

Vcc = 1.5 V, Ta = 25°C, 10 – 14.7 µH: one white LED / 4.7-6.8µH: two white LEDs in parallel, unless otherwise noted.

Parameter

Conditions

Min

Typ.

Max

Units

Supply Voltage,

min. operating

min. startup

max. operating

L1 = 10...14.7 µH

Ta = 25°C

1.90

0.70

0.90

0.80

0.95

[V]

[V]

[V]

Supply Voltage,

min. operating

min. startup

max. operating

L1 = 10...14.7 µH

Ta = 0...60°C

1.90

0.80

1.00

0.90

1.05

[V]

[V]

[V]

LED Mean Current (at VLS < Voff)

measured with L1 type LQH32CN

Murata

L1 = 47 µH

L1 = 32 µH

L1 = 26.7 µH

L1 = 22 µH

L1 = 14.7 µH

L1 = 10 µH

L1 = 6.8 µH

L1 = 4.7 µH

6.5

8.3

10.8

12

15

23

32

40

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

Switching Current at Vout

Vout = 0.4 V

250

[mA]

Switching Frequency

500

[kHz]

Threshold Voff at LS *)

Vcc > 950 mV

Ta = 25°C

Ta = 0...60°C

0.26

0.27

0.28

[V]

[V]

Threshold Von at LS *)

Vcc > 950 mV

Ta = 25°C

Ta = 0...60°C

0.21

0.22

0.23

[V]

[V]

Quiescent supply current

VLS > Voff

VLS < Von

Vcc > 850 mV

Vcc = 600 mV

Vcc = 400 mV

Vcc > 850 mV

Vcc = 600 mV

Vcc = 400 mV

100

50

< 10

8

100

< 10

[µA]

[µA]

[µA]

[mA]

[µA]

[µA]

Input resistance of LS input

series resistor R1

resistor to Gnd R2

30

400

[k ]

Ω

[k ]

Ω

Internal reference (bandgap)

Vref

200

[mV]

Efficiency

80

[%]

Vout

15

[V]

© PREMA Semiconductor GmbH 2006-2014 I rev. 1014

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