VIN

LX

DIM

FS

PGND

IADJ

GND

VCC

1

2

3

4

8

7

6

5

EP

Top View

8-Lead Plastic SOIC-8

Package Number DDA

VIN

LX

DIM

FS

PGND

IADJ

GND

VCC

Top View

8-Lead Plastic WSON-8

Package Number NGQ

2

3

4

1

7

6

5

8

EP

LM3414, LM3414HV

SNVS678E – JUNE 2010 – REVISED MAY 2013

www.ti.com

Connection Diagram

PIN DESCRIPTIONS

Pin

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

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

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.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings (LM3414)

(1)

VIN to GND

-0.3V to 42V

VIN to GND (Transient)

45V (500 ms)

LX to PGND

-0.3V to 42V

LX to PGND (Transient)

-3V(2 ns) to 45V (500 ms)

FS, IADJ to GND

-0.3V to 5V

DIM to GND

-0.3V to 6V

2kV

Storage Temp. Range

-65°C to 125°C

Soldering Information

Lead Temperature (Soldering 10s)

260°C

Infrared/Convection Reflow (20sec)

235°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.

(2)

The human body model is a 100pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

2

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