IRPLLED1A International Rectifier, IRPLLED1A Datasheet - Page 5

• Manufacturer Part Number: IRPLLED1A
• Description: Power Management IC Development Tools Hi-Vlt DC-DC Buck Cnvr HBLED Cur Cntrl
• Manufacturer: International Rectifier
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of IRPLLED1A

• Product: Power Management Development Tools
• Tool Is For Evaluation Of: IRS25401PBF
• Output Voltage: 16 V to 24 V
• Output Current: 350 mA to 1.5 A
• Factory Pack Quantity: 1

Since some of these equivalent values of resistance are not available, series and parallel combinations are used and
are specified as follows (all combinations use standard value resistors: 1.43Ω, 0.56Ω, and 0.47Ω):
Although some of the series and parallel combinations do not yield the exact resistance needed for tolerance
purposes, they are accurate enough. For this evaluation board an extremely tight current regulation is achieved with
a worst case result of ±1.2% for the 350mA setting over the bus voltage range from 50V to 170V. Likewise a precise
regulation of ±0.25% can be maintained for a range of load voltage from 16V to 24V at the 350mA current setting.
The jumper positions on the evaluation boards (JSET) for setting the different load currents are shown below:
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R
R
R
R
R
R
1
1
1A
1 A
350mA
700mA
5 .
5 .
A
A
=
=
=
=
0
0
1
= 43
=
5 .
. 0
5 .
1
0
A
5 .
5 .
. 1
Ω
V
. 0
33
V
A
71
≈
=
Ω
=
Ω
Ω
(
0
≈
. 0
5 .
. 0
≈
47
(
Ω
33
. 0
. 1 (
Ω
47
Ω
43
+
Ω
Ω
. 0
+
||
56
. 0
. 1
Ω
56
43
)
Ω
Ω
Fig. 4a: JSET LED Current Programming Settings
( ||
)
)
. 0
( ||
=
47
. 0
. 0
Ω
47
715
+
Ω
Ω
. 0
+
56
. 0
Ω
RD-0608
56
)
Ω
=
)
. 0
( ||
515
. 0
47
Ω
Ω
+
. 0
56
Ω
)
=
. 0
343
Ω
5