LM3414 datasheet(3/20 Pages) NSC

Part #	LM3414

Description	1A 60W* Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor

PDF	20 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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3 / 20 page

Pin Descriptions

Pin(s)

Name

Description

Application Information

VCC

Internal Regulator Output Pin

This pin should be bypassed to ground by a ceramic capacitor

with a minimum value of 1µF.

PGND

Power Ground Pin

Ground for power circuitry. Reference point for all stated

voltages. Must be externally connected to EP and GND.

IADJ

Average Output Current Adjustment Pin

Connect resistor R

IADJ from this pin to ground to adjust the

average output current.

GND

Analog Ground Pin

Analog ground connection for internal circuitry, must be

connected to PGND external to the package.

Switching Frequency Setting Pin

Connect resistor R

FS from this pin to ground to set the

switching frequency.

DIM

PWM Dimming Control Pin

Apply logic level PWM signal to this pin controls the intend

brightness of the LED string.

Drain of N-MOSFET Switch

Connect this pin to the output inductor and anode of the

schottky diode.

VIN

Input Voltage Pin

The input voltage should be in the range of 4.5V to 42V

(LM3414) or 4.5V to 65V (LM3414HV).

Thermal Pad (Power Ground)

Used to dissipate heat from the package during operation.

Must be electrically connected to PGND external to the

package.

LM3414 Datasheet(PDF) 3 Page - National Semiconductor (TI)

LM3414 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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