LM3401EVAL National Semiconductor, LM3401EVAL Datasheet - Page 15

• Manufacturer Part Number: LM3401EVAL
• Description: BOARD EVALUATION FOR LM3401
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3401EVAL

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 4.5 ~ 35V
• Utilized Ic / Part: LM3401
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Kit Features: Hysteretic Control For Speed And
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Voltage - Output: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

This is the estimated amount of LED current variation over the
input voltage range. If the minimum input voltage was below
Parameter
Regulation
Accuracy
Ta_max
I
PFET
LED_PK
I
ripple
R1
R2
f
R3
C1
D1
C2
L1
sw
2.2 µF, 50V ceramic
40V, 1.8A, 130 mΩ
33 µH, >804 mA
1.0 µF, 50V
290 mΩ
40V, 1A
5.6 kΩ
±6.1%
108°C
Value
46 kΩ
1.6%
-
-
-
TABLE 1. Design Example Summary
0.95A minimum peak current limit
±42 mA max variation
±22.4 mV hysteresis
LED ripple reduction
15
11 mA variation
>345 mA rms
1MHz typical
690 mA DC
227 mA p-p
17V, the LED current variation would be calculated using the
100% duty cycle equation.
804 mA
Result
V
HYS
= 112 mV(adjustable)
219 kHz min
part-to-part
worst case
worst case
worst case
Comment
adjustable
Schottky
optional
vs VIN
1%
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