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Mean Well PWM-90-48DA2 Power Supply 90W 48V DALI2 1.88A

PWM style outputfully isolated plastic caseIP67Class II design without FGDALI2

SKU PWM-90-48DA2

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PWM-90-48DA2

PWM-40-48 Fixed output Backorder

PWM-60-48 Dimmable Low stock

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PWM-90-48DA DALI Backorder

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Overview

PWM-90-48DA2 is the 48V output model of this series: rated current 1.88A, rated power 90.24W, typical efficiency 90.5%.

PWM-90 series is a 90W LED AC/DC LED driver featuring the constant voltage mode with PWM style output, which is able to maintain the brightness homogeneity when driving all kinds of LED strips.PWM-90 operates from 90～305VAC and offers models with different rated voltage ranging between 12V and 48V. Thanks to the high efficiency up to 90.5%, with the fanless design, the entire series is able to operate for -40℃ ~ +85℃ case temperature under free air convection. The entire series is rated with IP67 ingress protection level and is suitable to work for dry, damp or wet locations. PWM-90 is equipped with dimming function that varies the duty cycle of the output, providing great flexibility for LED strips applications.

Features

Constant Voltage PWM style output
Emergency lighting application is available according to IEC61347-2-13
Built-in active PFC function and class II design
Class 2 power unit(except PWM-90-12)
No load power consumption <0.5W
Fully encapsulated with IP67 level
Function: 3 in 1 dimming (dim-to-off); DALI-2
Minimum dimming level 0.2% for DALI-2 type
Typical lifet ime>50000 hours and 5 years warranty

Specifications

PWM-90-48DA2Specifications from the official datasheet (2026-07-08 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 1.88A
RATED POWER: 90.24W
DIMMING RANGE: 0 ~ 100%
PWM FREQUENCY (Typ.): 1.47kHz for Blank-Type, 2.5kHz for DA2-Type
SETUP, RISE TIME^{Note.2 Note.9}: 500ms, 80ms/ 115VAC or 230VAC
HOLD UP TIME (Typ.): 16ms/115VAC or 230VAC

INPUT

VOLTAGE RANGE^Note.3: 90 ~ 305VAC 127 ~ 431VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.98/115VAC, PF>0.96/230VAC, PF>0.92/277VAC @ full load (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 20%(@load≧60%/115VAC, 230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION” section)
EFFICIENCY (Typ.): 90.5%
AC CURRENT (Typ.): 0.95A / 115VAC 0.5A / 230VAC 0.4A / 277VAC
INRUSH CURRENT (Typ.): COLD START 60A(twidth=550 μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. NO. of PSUs on 16A CIRCUIT BREAKER: 3 units (circuit breaker of type B) / 6 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.25mA / 277VAC
NO LOAD POWER CONSUMPTION: <0.5W

PROTECTION

OVERLOAD: 108 ~ 130% rated output power Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT: Shut down o/p voltage, re-power on to recover(except for DA2-type) Hiccup mode,recovers automatically after fault condition is removed (only for DA2-type)
OVER VOLTAGE: 54 ~ 60V Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: Tcase=-40 ~ +85℃ (Please refer to “ OUTPUT LOAD vs TEMPERATURE” section)
MAX. CASE TEMP.: Tcase=+85℃
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.5: UL8750, CSA C22.2 No. 250.13-12; ENEC BS EN/EN61347-1, BS EN/EN61347-2-13 independent, BS EN/EN62384, IP67,BIS IS 15885(Part2/Sec13)(for 12,24,48 Blank and DA2 Type), EAC TP TC 004,GB/T19510.1, GB/T19510.213 approved; Design refer to BS EN/EN60335-1;According to BS EN/EN61347-2-13 appendix J suitable for emergency installations(EL)(AC Input: 100-240Vac)(for DA2-Type only)
DALI STANDARDS: IEC62386-101, 102, 207,251 for DA2-Type only,Device type 6(DT6)
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC; I/P-DA:1.5KVAC; O/P-DA:1.5KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION^Note.6: Compliance to BS EN/EN55015, BS EN/EN61000-3-2 Class C (@load≧60%) ; BS EN/EN61000-3-3,GB/T 17743, GB17625.1;EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11; BS EN/EN61547, light industry level (surge immunity Line-Line 2KV), EAC TP TC 020

OTHERS

MTBF: 2394.5K hrs min. Telcordia SR-332 (Bellcore) ; 224.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 171*63*37.5mm (L*W*H)
PACKING: 0.77Kg; 18pcs/14.9Kg/0.97CUFT

Certifications & ratings

AC Input: 100-240Vac (for DA2-Type only)

Test conditions and notes9

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
3. Length of set up time is measured at first cold start. Turning ON/OFF the driver may lead to increase of the set up time.
4. The driver is considered as a component that will be operated in combination with final equipment. Since EMC performance will be affected by the complete installation, the final equipment manufacturers must re-qualify EMC Directive on the complete installation again. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
5. This series meets the typical life expectancy of >50,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 75℃ or less.
6. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com
7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
8. For any application note and IP water proof function installation caution, please refer our user manual before using. https://www.meanwell.com/Upload/PDF/LED_EN.pdf
9. Based on IEC 62386-101/102 DALI power on timing and interruption regulations, the set up time needs to test with a DALI controller which can support for DALI power on function, otherwise the set up time will be higher than 0.5 second for DA-2 type.

Technical drawings

PWM-90-48DA2 DIMMING OPERATION — DIMMING OPERATION

PWM-90-48DA2 ◎ Applying additive resistance — ◎ Applying additive resistance

PWM-90-48DA2 OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

PWM-90-48DA2 STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

PWM-90-48DA2 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

PWM-90-48DA2 LIFETIME(Kh) — LIFETIME(Kh)

PWM-90-48DA2 Block Diagram — Block Diagram

PWM-90-48DA2 Mechanical Specification — Mechanical Specification

PWM-90-48DA2 Recommend Mounting Direction — Recommend Mounting Direction

Typical applications

LED strip lighting
Indoor LED lighting
LED decorative lighting
LED architecture lighting
Industrial lighting

Downloads

Certificates5

UL Certificate (PWM-90)(EN) PDF Download

CB Certificate (PWM-90)(EN) PDF Download

EMC Certificate (PWM-90)(EN) PDF Download

ENEC Certificate (PWM-90)(EN) PDF Download

ErP Certificate (PWM-90)(EN) PDF Download

Test reports1

Test Report(PWM-90-48)(EN) PDF Download

FAQ

What is the difference between DALI and DALI2, and why does it matter for LED lighting control?

The PWM-90-48DA2 supports DALI2, complying with IEC62386-101, 102, 207, and 251 standards as a Device Type 6 (DT6). It is designed for integration with DALI2-compliant controllers and luminaires, offering digital control capabilities for LED lighting systems.

Can I use the PWM-90-48DA2 in an outdoor architectural lighting installation?

Yes. The PWM-90-48DA2 has an IP67 waterproof rating, protecting it against dust and temporary water immersion. It is suitable for outdoor architectural lighting, facade illumination, and landscape feature lighting supplied by 48V LED strips or modules.

Is the PWM-90-48DA2 compatible with smart building DALI2 lighting control systems?

Yes. The unit integrates directly with DALI2 bus-based lighting control systems, supporting dimming commands from DALI2 compliant controllers. With 90.24W output at 48V, it is appropriate for medium-scale DALI2-controlled zones in offices, retail spaces, or hospitality environments.

Can I use the PWM-90-48DA2 for museum or gallery display lighting that requires flicker-free dimming?

The PWM-90-48DA2 uses PWM-style output and DALI2 dimming control, which provides smooth, precise dimming suitable for display and accent lighting contexts. For flicker-sensitive applications, verify compatibility between the connected 48V LED load and the specific dimming frequency your installation requires.

How much 48V LED strip can the PWM-90-48DA2 support?

The PWM-90-48DA2 supplies up to 90.24W at 48V. Divide 90.24W by your strip's power consumption per meter to find the maximum run length — a 9 W/m strip, for instance, supports up to 10 meters from a single supply. Always verify your strip's rated power per meter before finalizing the design.

Can the PWM-90-48DA2 be installed in unheated outdoor enclosures in cold climates?

Yes. The operating temperature range extends down to -40°C, so it can be installed in unheated outdoor enclosures, rooftop sign cabinets, or cold-climate installations without risk of cold-start failure. The IP67-rated enclosure also prevents moisture intrusion in these environments.

How does the PWM-90-48DA2 compare to the PWM-90-48DA and other 48V siblings?

Both the PWM-90-48DA and PWM-90-48DA2 are 90W, 48V, 1.88A units with IP67 ratings; the key difference is that the DA2 supports the DALI2 protocol while the DA supports original DALI. Other 48V options in the series include the PWM-40-48 (40W), PWM-60-48 (60W), PWM-120-48 (120W, 2.5A), PWM-120-48DA (120W, 2.5A, DALI), PWM-200-48 (200W, 4.17A), and PWM-200-48DA2 (200W, 4.17A, DALI2). Choose based on the wattage and dimming protocol your project requires.

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Model	Power	Voltage	Current	IP Rating
Mean Well PWM-90-24DA2 Power Supply 90W 24V DALI2 3.75A	90W	24V	3.75A	IP67	View
Mean Well PWM-90-24 Power Supply 90W 24V - Dimmable 3.75A	90W	24V	3.75A	IP67	View
Mean Well PWM-90-24DA Power Supply 90W 24V - DALI 3.75A	90W	24V	3.75A	IP67	View
Mean Well PWM-90-12DA2 Power Supply 90W 12V DALI2 7.5A	90W	12V	7.5A	IP67	View
Mean Well PWM-90-48DA Power Supply 90W 48V - DALI 1.88A	90.24W	48V	1.88A	IP67	View
Mean Well PWM-90-48 Power Supply 90W 48V - Dimmable 1.88A	90.24W	48V	1.88A	IP67	View
Mean Well PWM-90-36DA Power Supply 90W 36V - DALI 2.5A	90W	36V	2.5A	IP67	View
Mean Well PWM-90-36 Power Supply 90W 36V - Dimmable 2.5A	90W	36V	2.5A	IP67	View
Mean Well PWM-90-12DA Power Supply 90W 12V - DALI 7.5A	90W	12V	7.5A	IP67	View
Mean Well PWM-90-12 Power Supply 90W 12V - Dimmable 7.5A	90W	12V	7.5A	IP67	View

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