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LM3414 bảng dữ liệu(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM3414
Giải thích chi tiết về linh kiện  1A 60W* Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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Pin Descriptions
Pin(s)
Name
Description
Application Information
1
VCC
Internal Regulator Output Pin
This pin should be bypassed to ground by a ceramic capacitor
with a minimum value of 1µF.
2
PGND
Power Ground Pin
Ground for power circuitry. Reference point for all stated
voltages. Must be externally connected to EP and GND.
3
IADJ
Average Output Current Adjustment Pin
Connect resistor R
IADJ from this pin to ground to adjust the
average output current.
4
GND
Analog Ground Pin
Analog ground connection for internal circuitry, must be
connected to PGND external to the package.
5
FS
Switching Frequency Setting Pin
Connect resistor R
FS from this pin to ground to set the
switching frequency.
6
DIM
PWM Dimming Control Pin
Apply logic level PWM signal to this pin controls the intend
brightness of the LED string.
7
LX
Drain of N-MOSFET Switch
Connect this pin to the output inductor and anode of the
schottky diode.
8
VIN
Input Voltage Pin
The input voltage should be in the range of 4.5V to 42V
(LM3414) or 4.5V to 65V (LM3414HV).
EP
EP
Thermal Pad (Power Ground)
Used to dissipate heat from the package during operation.
Must be electrically connected to PGND external to the
package.
3
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