MEAN WELL NPP-450 Series
450W High Reliable Ultra Wide Output Range Battery Charger & Power Supply 2-in-1
Key Features
- Multi-function single unit battery charger or power supply operation modes selectable
- Output voltage and current adjustable via potentiometer
- 3-stage charging curve for charging mode
- -30~+70°C wide operating temperature
- Multiple protections: Short circuit / Over load / Over voltage / Over temperature
- Thermal controlled DC fan for noise reduction
- Remote ON-OFF control
- Comply with IEC/EN/UL62368-1 and EN60335-1/-2-29 dual certification
- Suitable for lead-acid (Pb) batteries
- Carry handle accessory available (Order NO.: DS-Carry handle, sold separately)
- 3 years warranty
Applications
- Radio system backup solution
- Electric scooter charger
- Camping car, Buses, Heavy duty truck
- Specialty vehicles
- Surveillance system
- Industrial automation machinery
- Industrial control system
- Mechanical and electrical equipment
Product Description
The NPP-450 is a miniaturized dual-purpose charger and power supply. It functions as a three-stage charger for lead-acid batteries and a constant voltage output power supply for general loads. The operating mode is switched by a connector on the front panel. Features include ultra-wide voltage output, adjustable voltage via VR (10.5~21V, 21~42V, 42~80V, 54~100V), adjustable charging current (50~100%), built-in intelligent variable-speed fan, -30~+70°C operating temperature, compliance with IEC/EN/UL62368-1 and EN60335-1/-2-29 safety standards, multiple built-in protections, and a 3-year warranty. It is an intelligent, safe, and reliable universal dual-purpose charger and power supply with excellent cost performance.
Model Encoding
NPP - 450 - 24
Output voltage (12V/24V/48V/72V)
Rated wattage
Series name
Specifications: Battery Charger Mode (Default)
| Parameter | NPP-450-12 | NPP-450-24 | NPP-450-48 | NPP-450-72 |
|---|---|---|---|---|
| BOOST CHARGE VOLTAGE (Vboost) (default) | 14.4V | 28.8V | 57.6V | 72V |
| FLOAT CHARGE VOLTAGE(Vfloat)(default) | 13.8V | 27.6V | 55.2V | 69V |
| VOLTAGE ADJUSTABLE RANGE | 10.5~21V, 21~42V, 42~80V, 54~100V (By built-in potentiometer) | |||
| MAX. OUTPUT CURRENT(CC) | 25A | 13.5A | 6.8A | 5.5A |
| CURRENT ADJUSTABLE RANGE | 12.5 ~ 25A | 6.75~13.5A | 3.4~6.8A | 2.75~5.5A |
| MAX. POWER | 420W | 453.6W | 456.96W | 462W |
| RECOMMENDED BATTERY CAPACITY (AMP HOURS) | 90~300AH | 45~155AH | 24~80AH | 19~64AH |
Input Specifications
| Parameter | Value |
|---|---|
| VOLTAGE RANGE | 90~264VAC (127~370VDC) |
| FREQUENCY RANGE | 47~63Hz |
| POWER FACTOR (Typ.) | PF>0.98/115VAC, PF>0.95/230VAC at full load |
| EFFICIENCY (Typ.) | 92% (12V), 93% (24V, 48V, 72V) |
| AC CURRENT (Typ.) | 4.5A/115VAC, 2.2A/230VAC |
| INRUSH CURRENT (Typ.) | COLD START 50A at 230VAC |
Protection
| Parameter | Description |
|---|---|
| SHORT CIRCUIT | Constant current limiting; charger shuts down after 5 sec, re-power on to recover. |
| OVER VOLTAGE | Shut down and latch off output voltage; re-power on to recover. (12V: 21.5~26V, 24V: 43~52V, 48V: 82~100V, 72V: 102~120V) |
| OVER TEMPERATURE | Shut down output voltage; recovers automatically after temperature goes down. |
Function (Charger Mode)
| Parameter | Description |
|---|---|
| CHARGING STAGE | 3 stage |
| CHARGER OK SIGNAL | TTL signal: High (4.5~5.5V) = Charger OK; Low (-0.5~+0.5V) = Charger failure or protection status. |
| BATTERY FULL SIGNAL | TTL signal: High (4.5~5.5V) = Battery full; Low (-0.5~+0.5V) = Charging. |
| REMOTE CONTROL | Open: Charger stop charging; Short: Charger normal work. |
| FAN SPEED CONTROL | Depends on internal temperature. |
Environmental
| Parameter | Value |
|---|---|
| WORKING TEMP. | -30~+70°C (Refer to "Derating Curve") |
| WORKING HUMIDITY | 20~95% RH non-condensing |
| STORAGE TEMP., HUMIDITY | -40~+85°C, 10~95% RH non-condensing |
| TEMP. COEFFICIENT | ±0.05%/°C (0~50°C) |
| VIBRATION | 10~500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes |
Safety & EMC
| Category | Parameter | Standard | Test Level / Note |
|---|---|---|---|
| EMC EMISSION | Conducted | BS EN/EN55032 (CISPR32), BS EN/EN55014-1 | Class B |
| Radiated | BS EN/EN55032 (CISPR32), BS EN/EN55014-1 | Class B | |
| Harmonic Current | BS EN/EN61000-3-2 | Class A | |
| Voltage Flicker | BS EN/EN61000-3-3 | - | |
| EMC IMMUNITY | ESD | BS EN/EN61000-4-2 | Level 3, 8KV air; Level 2, 4KV contact |
| Radiated | BS EN/EN61000-4-3 | Level 2, 3V/m | |
| EFT/Burst | BS EN/EN61000-4-4 | Level 2, 1KV | |
| Surge | BS EN/EN61000-4-5 | Level 2, 1KV/Line-Line, Level 3, 2KV/Line-Earth | |
| Conducted | BS EN/EN61000-4-6 | Level 2, 3Vrms | |
| Magnetic Field | BS EN/EN61000-4-8 | Level 1, 1A/m | |
| Voltage Dips and Interruptions | BS EN/EN61000-4-11 | >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods |
Others
| Parameter | Value |
|---|---|
| MTBF | 352.3K hrs min. (Telcordia SR-332); 118.5K hrs min. (MIL-HDBK-217F @ 25°C) |
| DIMENSION | 205*130*55mm (L*W*H) |
| PACKING | 1.02Kg; 8pcs/ 10Kg / 1.71CUFT |
Block Diagram
The NPP-450 series utilizes a block diagram comprising an EMI Filter, Active Inrush Current Limiting, Rectifiers & PFC stage, Power Switching, Rectifiers & Filter stage, Over Voltage Protection (OVP) and Over Temperature Protection (OTP) Detection Circuit, PFC Control, PWM Control, Auxiliary Power supply, Control Circuit, and a Fan. The unit supports selectable Charger mode/PSU mode via a jumper, and includes Remote ON-OFF control and Data Isolation.
Derating Curves
Power Derating Curve: The graph shows that for ambient temperatures above 50°C, the maximum allowable power output decreases linearly. For example, at 60°C, the power is reduced to 80% of its rated value, and at 70°C, it is reduced to 60%. The curve is shown for 230VAC input only.
Output Current vs. Input Voltage Curve: This graph illustrates that the output current capability remains at 100% for input voltages between approximately 100V and 264VAC (at 60Hz). For input voltages below 100V, the output current is derated.
Output Voltage vs. Output Current (Charger Mode): This chart shows the relationship between output voltage and current for different models in charger mode. For example, the NPP-450-12 has a voltage range of 10.5-21V and a rated current of 25A. The rated current should change with the output voltage programming accordingly.
Function Manual
Operation Modes
The NPP-450 can operate as either a Battery Charger or a Power Supply. This mode is selected using a jumper on pins 3 and 4. When the jumper is connected between pins 3 and 4, the unit operates in Power Supply mode. When the jumper is removed, it defaults to Battery Charger mode.
Charging Curve (Charging Mode)
The unit employs a 3-stage charging curve: Stage 1 (Constant Current), Stage 2 (Constant Current), and Stage 3 (Constant Voltage/Float). The charging process is indicated by an LED: Red indicates Stage 1 or Stage 2 (charging), and Green indicates Stage 3 (float stage) or full charge. The table below shows the Vboost and Vfloat values for each model:
| State | NPP-450-12 | NPP-450-24 | NPP-450-48 | NPP-450-72 |
|---|---|---|---|---|
| Constant Current | 25A | 13.5A | 6.8A | 5.5A |
| Vboost | 14.4V | 28.8V | 57.6V | 72V |
| Vfloat | 13.8V | 27.6V | 55.2V | 69V |
The unit is suitable for lead-acid batteries (flooded, Gel and AGM).
Charger OK / DC OK Signal
This is a TTL level signal, with a maximum sourcing current of 10mA.
- Signal: "High" (4.5~5.5V) Status: Work normally (Charger OK / DC OK)
- Signal: "Low" (-0.5~0.5V) Status: Failure or protection function activated
Remote ON-OFF Control
The NPP-450 can be turned ON/OFF remotely using the "Remote Control" function. This is achieved by connecting pins 7 (Remote ON-OFF) and 8 (+12Vaux).
- Connection: Short (Pin 7 = 10.8~13.2V) Status: ON (Default)
- Connection: Open (Pin 7 = -0.5 ~ 0.5V) Status: OFF
Mechanical Specification
The unit has dimensions of 205mm (Length) x 130mm (Width) x 55mm (Height). The airflow direction is indicated by an arrow pointing towards the front panel.
Connector Pin Assignment
The control connector (CN71) is a HRS DF11-14DP-2DS or equivalent. Pin assignments are as follows:
| Pin No. | Assignment | Mating Housing | Terminal | Description |
|---|---|---|---|---|
| 1,2,11~14 | NC | HRS DF11-14DS or equivalent | HRS DF11-**SC or equivalent | No connection. |
| 3,4 | Battery Charger / Power Supply | Mode selection: Jumper connected for Power Supply mode; Jumper removed for Battery Charger mode (Default). | ||
| 5 | Battery Full | Signal is a TTL level signal. High (4.5~5.5V) when battery is full; Low (-0.5~0.5V) when charging. Max sourcing current 10mA. | ||
| 6 | Charger OK / DC OK | Charger OK / DC OK Signal (TTL level). High (4.5~5.5V) for normal operation; Low (-0.5~0.5V) for charger failure or protection activation. Max sourcing current 10mA. | ||
| 7 | Remote ON-OFF | Remote control: Short (10.8~13.2V) for ON (Default); Open (-0.5~0.5V) for OFF. Max input voltage 13.2V. | ||
| 8 | +12V-AUX | Controlled by Remote ON-OFF. | ||
| 9,10 | GND-AUX | Signal return isolated from output terminals (+V & -V). |
Note 1: Non-isolated signal, referenced to [GND(signal)]. Note 2: Isolated signal, referenced to GND-AUX.
LED Status Table
Charger (Default) Mode
| LED Indicator | Status |
|---|---|
| Green | Float stage (stage 3) or full charged |
| Red | Charging (stage 1 or stage 2) |
| No Light | Abnormal |
Power Supply Mode
| LED Indicator | Status |
|---|---|
| Green | Normal working |
| No Light | Abnormal |
Accessory List
A mating pin for selecting Battery Charger or Power Supply mode (pins 3 and 4) is included as a standard accessory.
Optional Accessories:
- DS-Carry Handle: Includes Handle, Foot pad (4 pcs), and Screws (2 pcs).
Installation Manual
For installation guidance, please refer to: http://www.meanwell.com/manual.html
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