PR4401 Datasheet, PDF (2/12 Pages) List of Unclassifed Manufacturers – 0.9V Boost Driver for White LEDs PR4401/4402 Requires Only One External Component

LED DRIVER PR4401/PR4402
Absolute Maximum Ratings (PR4401 and PR4402)
Parameter
VCC (no damage)
Operating Temperature Range
Storage Temperature Range
Electrostatic Discharge (ESD) Protection
Min Typ Max
-0.3
8
-20
85
-55
150
2
Units
V
°C
°C
kV
Electrical Characteristics
Vcc=1.5V, Ta = 25°C, 10-22µH: one white LED / 4.7-6.8µH: two white LEDs in parallel, unless otherwise noted.
Parameter
Supply Voltage, min. operating
min. startup
max. operating
Supply Voltage, min. operating
min. startup
max. operating
LED Mean Current
measured with L1 type LQH32C Murata
Switching Current at Vout
Switching Frequency
Quiescent supply current
Efficiency
Vout
Conditions
L1 = 10...22µH
Ta = 25°C
L1 = 10...22µH
Ta = 0...60°C
L1 = 47µH
L1 = 32µH
L1 = 26.7µH
L1 = 22µH
L1 = 14.7µH
L1 = 10µH
L1 = 6.8µH
L1 = 4.7µH
Vout = 0.4V
Vcc > 950mV
Vcc = 600mV
Vcc = 400mV
Min Typ Max
PR4401
0.70 0.80
0.90 0.95
1.90
0.80 0.90
1.00 1.05
1.90
6.5
8.3
10.8
12
15
23
--
--
200
500
4
5
50
10
80
Vcc
15
Min Typ Max
PR4402
0.70 0.80
0.90 0.95
1.90
0.80 0.90
1.00 1.05
1.90
--
--
--
12
15
23
32
40
250
500
8
10
100
20
80
15
Units
V
V
V
V
V
V
mA
mA
mA
mA
mA
mA
kHz
mA
µA
µA
%
V
Block Diagram
Ref.
Vcc
Comp.
Control
Logic
Vout
© PREMA Semiconductor GmbH 2006-2008
Page 2/12
Gnd
Rev 0908