LM3414HVMR/NOPB National Semiconductor, LM3414HVMR/NOPB Datasheet - Page 16
![IC LED DRIVER BUCK 1A 8-PSOP](/photos/13/94/139470/8-epsop_sml.jpg)
LM3414HVMR/NOPB
Manufacturer Part Number
LM3414HVMR/NOPB
Description
IC LED DRIVER BUCK 1A 8-PSOP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Automotive, High Brightness (HBLED)r
Datasheet
1.LM3414SDNOPB.pdf
(20 pages)
Specifications of LM3414HVMR/NOPB
Constant Current
Yes
Topology
Low Side, PWM, Step-Down (Buck)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Automotive, General Purpose
Type - Secondary
High Brightness LED (HBLED)
Frequency
250kHz ~ 1MHz
Voltage - Supply
4.5 V ~ 65 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width) Exposed Pad
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
1A
Internal Switch(s)
Yes
Efficiency
96%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM3414HVMR/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
www.national.com
ANALOG DIMMING CONTROL
The IADJ pin can be used as an analog dimming signal input.
As the average output current of the LM3414 depends on the
current being drawn from the IADJ pin, thus the LED current
When external bias current I
reduction of LED current follows the equations:
Provided that
EXT
is applied to the IADJ pin, the
FIGURE 6. Analog LED Current Control Circuit
16
can be increased or decreased by applying external bias cur-
rent to the IADJ pin. The simplified circuit diagram for facili-
tating analog dimming is as shown in figure 6.
I
This feature is exceptionally useful for the applications with
analog dimming control signals such as those from analog
temperature sensors and ambient light sensors.
LED
decreases linearly as I
EXT
increases.
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