LED Driver PR4401 / PR4402

Electrical Properties

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATNGS

(PR4401 and PR4402)

Parameter

Units Min Max

Vcc (no damage)

[V]

-0.3

8

Operating Temperature Range

[°C]

-20

85

Storage Temperature Range

[°C]

-55

150

Electrostatic Discharge (ESD)

Protection

[kV]

2

-

ELECTRICAL CHARACTERISTICS

Vcc = 1.5 V, Ta = 25°C, 10 - 22 µH: one white LED / 4.7 - 6.8 µH: two white LEDs in parallel, unless otherwise noted.

PR4401

PR4402

Parameter

Conditions

Units

Min

Typ

Max

Min

Typ

Max

Supply Voltage,

min. operating

min. startup

max. operating

L1 = 10...22 µH

Ta = 25°C

[V]

[V]

[V]

1.90

0.70

0.90

0.80

0.95

1.90

0.70

0.90

0.80

0.95

Supply Voltage,

min. operating

min. startup

max. operating

L1 = 10...22 µH

Ta = 0...60°C

[V]

[V]

[V]

1.90

0.80

1.00

0.90

1.05

1.90

0.80

1.00

0.90

1.05

LED Mean Current

measured with L1 type

LQH32C 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

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

[mA]

6.5

8.3

10.8

12

15

23

--

--

--

--

--

12

15

23

32

40

Switching Current at Vout

Vout = 0.4 V

[mA]

200

250

Switching Frequency

[kHz]

500

500

Quiescent supply current

Vcc > 950 mV

Vcc = 600 mV

Vcc = 400 mV

[mA]

[µA]

[µA]

4

50

10

5

8

100

20

10

Efficiency

[%]

80

80

Vout

[V]

Vcc

15

15

© PREMA Semiconductor GmbH 2006-2014 I rev. 1014

Page 2/12

Ref.

Vcc

Gnd

Vout

Comp.

Control

Logic