MEAN WELL NLDD-H Series Constant Current Step Down LED Driver Owner’s Manual

: September 4, 2024
: MEAN WELL

Table of Contents

NLDD-H Series Constant Current Step Down LED Driver
Specifications:
Product Usage Instructions:
Installation:
Dimming Control:
Safety Precautions:
- Frequently Asked Questions (FAQ):
Q: Can I connect multiple LED loads to a single NLDD-H
Q: How do I troubleshoot if the driver does not power on?
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

NLDD-H Series Constant Current Step Down LED Driver

Specifications:

Model: NLDD-H series
Current Range: 350mA, 500mA, 700mA, 1050mA,
1200mA, 1400mA
Voltage Range: 6 ~ 52VDC
Output Ripple & Noise: 150mVp-p
Switching Frequency: 200KHz
Input Voltage Range: 10 ~ 56VDC (59VDC
Max.)
Efficiency: 96% at full load and 36VDC/48VDC
input
PWM Dimming & ON/OFF Control: Yes
Quiescent Input Current in Shutdown Mode: 2mA
at PWM dimming OFF at 48VDC input
Working Temperature: -40 ~ +50°C
Working Humidity: 20% ~ 90% RH
non-condensing
Safety Standards: LVD BS EN/EN61347-1, BS
EN/EN61347-2-13; IEC61347 and EAC TP TC 004 approved
EMC Emission: Compliance to BS EN/EN55015, BS
EN/EN61547
EMC Immunity: Compliance to BS
EN/EN61000-4-2,3,4,6,8, light industry level, EAC TP TC 020
DIMENSION WEIGHT: 32.120.512.5mm or
1.260.80.49 inch (LWH)
POTTING MATERIAL: Expoxy(UL94-V0)

Product Usage Instructions:

Installation:

Ensure the input voltage is within the specified range.
Connect the LED load to the output terminals of the
driver.
Securely mount the driver in a well-ventilated area to prevent
overheating.

Dimming Control:

To dim the LEDs connected to the driver, apply a PWM signal
within the frequency range of 100 ~ 1KHz to the DIM pin according
to the provided PWM dimming specifications.

Safety Precautions:

Avoid short-circuiting the output terminals.
Do not exceed the maximum temperature and humidity limits
during operation.
Refer to the safety standards for proper compliance and
installation.

Frequently Asked Questions (FAQ):

Q: Can I connect multiple LED loads to a single NLDD-H

driver?

A: It is recommended to avoid connecting multiple LED loads to a
single driver to prevent overloading and ensure optimal
performance.

Q: How do I troubleshoot if the driver does not power on?

A: Check the input voltage, connections, and ensure that the DIM
pin is receiving the correct signal for power-on operation. If
issues persist, refer to the warranty statement or contact customer
support.

DC-DC Constant Current Step-Down LED driver

NLDD-H series
User’s Manual

or DC .

File Name:NLDD-H-SPEC 2024-02-18

DC-DC Constant Current Step-Down LED driver

NLDD-H series

SPECIFICATION
ORDER NO.

NLDD-350H

NLDD-500H

NLDD-700H

NLDD-1050H

NLDD-1200H

NLDD-1400H

CURRENT RANGE

350mA

500mA

700mA

1050mA

VOLTAGE RANGE Note.4 6 ~ 52VDC

OUTPUT

CURRENT ACCURACY (Typ.) ±5% at 48VDC input

RIPPLE & NOISE(max.) Note.2 150mVp-p

150mVp-p

200mVp-p

350mVp-p

SWITCHING FREQENCY

200KHz

VOLTAGE RANGE

10 ~ 56VDC (59VDC Max.)

INPUT

EFFICIENCY (max.)

96% at full load and 36VDC/48VDC input

DC CURRENT Full load Note.3 350mA

No load

5mA

490mA

Leave open if not use

700mA

1100mA

PWM DIMMING
& ON/OFF CONTROL

REMOTE ON/OFF

Power ON with dimming: DIM ~ -Vin >2.5 ~ 5VDC or open circuit Power OFF : DIM ~ -Vin < 0.8VDC or short

PWM FREQUENCY

100 ~ 1KHz

QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(max.)

2mA at PWM dimming OFF at 48VDC input

1200mA 6 ~ 46VDC
350mVp-p

1400mA 350mVp-p

95% at full load and 36VDC/48VDC input

1200mA

1360mA

SHORT CIRCUIT PROTECTION
OVER TEMPERATURE

Regulated at rated current Protection type: Can be continued, recovers automatically after fault condition is removed Tj 165 typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

WORKING TEMP.

-40 ~ + 50(Refer to derating curve)

WORKING HUMIDITY

20% ~ 90% RH non-condensing

STORAGE TEMP., HUMIDITY -40 ~ +85, 10 ~ 95% RH

ENVIRONMENT TEMP. COEFFICIENT

±0.03% /

VIBRATION

10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes

OPERATING CASE TEMP. (max.) 90

SOLDERING TEMPERATURE Wave soldering: 265,5s (max.); Manual soldering: 390,3s (max.)

SAFETY STANDARDS

LVD BS EN/EN61347-1, BS EN/EN61347-2-13;IEC61347 and EAC TP TC 004 approved

EMC

EMC EMISSION

EMC IMMUNITY

Compliance to BS EN/EN55015, BS EN/EN61547 Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, EAC TP TC 020

MTBF

29984.3K hrs min. Telcordia SR-332 (Bellcore) 2881.6Khrs min. MIL-HDBK-217F (25)

OTHERS

DIMENSION WEIGHT

32.120.512.5mm or 1.26″0.8″0.49″ inch (LWH) NLDD-H:15.6g ; NLDD-HW:18g (Please refer to Page 6 for packing)

NOTE

POTTING MATERIAL

Expoxy(UL94-V0)

1.All parameters are specified at normal input(48VDC), rated load, 25 70% RH ambient.

2.Ripple & noise are measured at 20MHz by using a 12″ twisted pair terminated with a 0.1f capacitor. 3.Test condition: 48VDC input. 4.Output voltage will always step down by 4 volts from input DC voltage. 5.The output of NLDD-H should not be connected to the input of the same unit or output from other sources. 6.The power supply is regarded as a part of the components in the system, and the final EMI test needs to be tested with the final device. If an
additional EMI filter circuit is required to meet the electromagnetic compatibility requirements, please refer to the EMC test report for details. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf) 7.Please refer to the warranty statement on MEAN WELL’s website at http://www.meanwell.com
Product Liability DisclaimerFor detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx

File Name:NLDD-H-SPEC 2024-02-18

DC-DC Constant Current Step-Down LED driver

NLDD-H series

Mechanical Specification Blank type(NLDD- 350~1050H):

Unit: mm (inch)

20.5 [0.80]

2.06 [ 0.08]

24

1

23

2

22

BOTTOM VI EW

3.81 [ 0.15]

SIDE VI EW

2.5 4 [ 0.1]

14

11

13

12

15.24 [ 0.60]

NOTE: Pin tolerance ±0.5mm

0.60 12.5 [0.49]

32.1[1.26]

Pin Configuration

Pin No.

Comment

1,2 11,12

-Vin -Vout

Don’t connect to -Vout
LED – Connection

13,14 +Vout LED + Connection

ON/OFF and PWM

22 PWM DIM

Dimming

(Leave open if

not used)

23,24 +Vin

DC Supply

others N.C

No connection

Blank type(NLDD- 1200~1400H):

20.5 [ 0.80]

2.06 [ 0.08]

24

1

23

2

21 BOTTOM VI EW

3.81 [ 0.15]

SIDE VI EW

2.5 4 [ 0.1]

14

11

13

12

15.24 [ 0.60]

NOTE: Pin tolerance ±0.5mm

0.60 12.5 [0.49]

32.1 [1.26]

Pin No.

Comment

1,2 11,12

-Vin -Vout

Don’t connect to -Vout
LED – Connection

13,14 +Vout LED + Connection

21 23,24

ON/OFF and PWM

PWM DIM

Dimming

(Leave open if

not used)

+Vin

DC Supply

others N.C

No connection

W type(NLDD – 350~1400HW):

20.5 [0.80]

5±2mm 100±10mm

12.5 [0.49]

23

2

21

BOTTOM VI EW

2 21
SIDE VI EW

14

11

NOTE: All wires UL1569 22AWG

32.1[1.26]

Pin No.

Comment

2

-Vin (Black)

Don’t connect to -Vout

11

-Vout (Blue)

LED – Connection

14

+Vout (Yellow)

LED + Connection

21
23 others

ON/OFF and PWM

PWM DIM

Dimming

(White) (Leave open if

not used)

+Vin (Red)

DC Supply

N.C

No connection

File Name:NLDD-H-SPEC 2024-02-18

LOAD (%)
Iout(%)

DC-DC Constant Current Step-Down LED driver
Derating Curve

NLDD-H series

100

75

50

for 1200/1400mA

for other

25

-40

0 10 20 30 40 45 50 60 70 80 90 100

Ta ()

PWM Dimming Control

PWM Signal

H(5V) L(0V)

100~1KHz

Max
Output Current
0

Standard Application
+Vin

PWM H
L

NLDD-H
Dimming

-Vin

Short circuit PWM PIN can realize dimming turn off. During PWM dimming operation, the output current will change to
PWM style. 100 Tol : ±5%(Typ.) 75
50
25

10

25

50

75

100

Duty Cycle (%)

+Vout

1st LED Last LED

H: >2.5~5VDC or open circuit L: <0.8VDC or short

-Vout

File Name:NLDD-H-SPEC 2024-02-18

DC-DC Constant Current Step-Down LED driver
Efficiency VS Output Voltage