Overview
The NCP45492XMNTWG is a high-performance monolithic IC designed by ON Semiconductor to monitor bus voltage and current on four high-voltage power supplies simultaneously. This device translates the high-voltage bus voltages and currents into a low-voltage power domain and multiplexes them onto a single differential output, allowing for external measurement by common ADCs. It can operate either standalone or as a pair, enabling the monitoring of up to eight separate high-voltage power supplies.
Key Specifications
| Rating | Pins | Condition | Symbol | Value | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | VCC | GND = 0 V | VCC | −0.3 to 5.5 | V |
| Bus Input Voltage Range | BV_INx, IN_Px, IN_Nx | GND = 0 V | VBV_IN | −0.3 to 30 | V |
| Digital Input Voltage Range | MUX_SEL, EN_B, SKIP, SCL, SDA, ADRS[x] | GND = 0 V | VLV | −0.3 to 5.5 | V |
| Low Voltage I/O Range | DIFF_OUT_P, DIFF_OUT_N, BV_OK, BG_REF_OUT | GND = 0 V | VLV | −0.3 to 5.5 | V |
| Thermal Resistance, Junction-to-Air | RθJA | 40 | °C/W | ||
| Thermal Resistance, Junction-to-Case (VIN Paddle) | RθJC | 5 | °C/W | ||
| Operating Temperature Range | TA1 | −40 to 105 | °C | ||
| Functional Temperature Range | TA2 | −40 to 125 | °C |
Key Features
- Translates and scales shunt and bus voltages up to 26 V
- Single device monitors up to four high-voltage power supplies
- May be paired for monitoring up to eight high-voltage power supplies
- Very low power-down current
- All channels individually gain programmable by external resistor selection
- Fast settling time
- Real-time indication of all bus voltages valid
- Adjustable output common-mode voltage adapts to most external ADCs
- Lead-free device
Applications
- Computers and Notebooks
- Graphics Cards
- Desktop Computers
- Set-top boxes
- Enterprise Servers
- Telecom Equipment
- Power Management and Power Control Loops
- Battery Chargers
Q & A
- What is the primary function of the NCP45492XMNTWG?
The NCP45492XMNTWG is designed to monitor bus voltage and current on four high-voltage power supplies simultaneously, translating these values into a low-voltage domain for external measurement.
- How many high-voltage power supplies can be monitored with a single NCP45492XMNTWG device?
A single device can monitor up to four high-voltage power supplies.
- Can the NCP45492XMNTWG be paired to monitor more supplies?
- What is the operating temperature range of the NCP45492XMNTWG?
The operating temperature range is from −40°C to 105°C.
- How is the gain of each channel programmed?
The gain of each channel is individually programmable by external resistor selection.
- What is the typical power-down current of the NCP45492XMNTWG?
The typical power-down current is very low, specifically 200 μA in standby mode.
- What is the maximum bus input voltage range for the NCP45492XMNTWG?
The maximum bus input voltage range is from −0.3 V to 30 V.
- Is the NCP45492XMNTWG a lead-free device?
- What types of applications is the NCP45492XMNTWG suitable for?
- How does the device handle thermal management?
The device has a thermal resistance of 40°C/W (junction-to-air) and 5°C/W (junction-to-case).
