OM5448TR Hendon Semiconductors, OM5448TR Datasheet - Page 5

• Manufacturer Part Number: OM5448TR
• Description: LED Drivers 1-3.5V 1W LED Boost Driver
• Manufacturer: Hendon Semiconductors

Specifications of OM5448TR

• Operating Supply Voltage: 1 V to 3.5 V
• Maximum Supply Current: 1.7 mA
• Maximum Power Dissipation: 200 mW
• Maximum Operating Temperature: 85 C
• Package / Case: SO-23-5
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8
At T
2007 May 28, Revision 1.0
Power supply
V
Supply current, V
I
I
I
Efficiency
η
Output drive, OP (pin 4)
V
V
F
Set peak output current, SETI (pin 3)
V
Enable input, EN (pin 5)
I
−V
SUP(standby)
SUP(run)
SUP(run)
EN
OP
CC
OP(max)
OP(sat)
SETI
SYMBOL
EN
CHARACTERISTICS
amb
= 25°C; Voltages are specified with respect to V
supply voltage (operating)
standby supply current
operating supply current
operating supply current
operating efficiency, see
figure 4 for the circuit
output drive voltage maximum
output switching threshold
(output transistor saturation
voltage)
oscillator frequency
voltage on SETI pin
pull-up current
enable switching threshold
CC
, (pin 1)
PARAMETER
V
V
= 4.7 kΩ, (~20mA I
V
= 68 kΩ, (~20mA I
V
V
Care must be taken that
the flyback voltage on the
output pin VP does not
exceed V
output drive current at
which this threshold
voltage is reached is set
by choice of RSETI
inductor = 220 µH
(R
V
inductor = 220 µH (R
1.6 Ω), R
V
250 mA, inductor =
100 µH (R
R
V
1.2 mA, inductor =
220 µH (R
R
V
V
V
EN
EN
EN
CC
CC
CC
CC
CC
EN
EN
CC
SETI
SETI
S
< 1.6 Ω)
= V
= V
= V
= 0 V, V
with respect to V
= 1.2 V, V
= 2.4 V, V
= 2.4 V, I
= 2.4 V, IOP =
= 2.4 V, IOP =
= 2.4V
CONDITIONS
EE
= 78 kΩ
= 78 kΩ
EE
CC
CC
(pin 2). Unless otherwise specified.
5
SETI
OP(max)
S
S
= 1.2 V, R
= 2.4 V, R
= 0.09 Ω),
= 1.6 Ω),
CC
OP
= 78 kΩ
OP
OP
= 2.4V
.
= 20 mA
= 3.1 V
= 3.1 V
OP
OP
)
S
SETI
SETI
CC
)
=
,
1
1.5
−
−
−
−
−
−
−
−
−
−
−
−
Low Voltage LED Driver
MIN
and Boost Converter
−
250
700
400
70
80
−
450
80
V
1 V
V
2.15 V
V
0.73 V
2.5
−590
CC
CC
CC
TYP
−
−
−
Product Specification
OM5448
3.5
−
−
−
−
−
14
−
−
−
−
−
4.0
−
MAX
V
µA
µA
µA
%
%
V
mV
kHz
V
V
V
µA
mV
UNIT