VTM48EF040T200A00
200A high-efficiency current multiplier for FPA, converting 48V to 1V at 200A with 97% peak efficiency.
Product Overview
Description
The VTM48EF040T200A00 is a 200A VTM current multiplier for Factorized Power Architecture.
Converts 48V input to 1V output at 200A continuous with industry-leading 97% efficiency.
Designed for powering high-current loads like GPUs, FPGAs, and ASICs directly at the point of load.
Product Series
VTM
Primary Application
GPU power for AI accelerators
Key Features
- 97% peak efficiency for reduced power loss
- High current density - 200A from compact module
- Integrated thermal interface for direct cooling
- Low output impedance for excellent transient response
- Parallel operation for higher current
- Soft-start and pre-biased output startup
Specifications
| Input Voltage | 38-55V DC |
|---|---|
| Output Voltage | 1V fixed ratio transformation |
| Output Current | 200A continuous |
| Efficiency | Up to 97% |
| Power Density | 2,500A per cubic inch |
| Package | VI Chip |
Applications
GPU power for AI accelerators
Electronic system design
FPGA and ASIC point-of-load
Electronic system design
High-performance processor power
Electronic system design
Data center acceleration cards
Electronic system design
GPU clusters
Electronic system design
FAE Expert Insights
"The VTM48EF040T200A00 is a game-changer for high-current power delivery. I've designed power systems for AI accelerators and GPU clusters where traditional approaches struggled with distribution losses and thermal management. With this VTM, the 48V bus comes directly to the GPU board, and the VTM provides 200A at 1V right at the load. The 97% efficiency means minimal heat generation, and the thermal pad allows direct attachment to the board's heatsink. In a recent AI accelerator design, we achieved 15% higher efficiency compared to the previous design using conventional converters. For any high-current application, this VTM is the answer."
Enables unprecedented power delivery for AI accelerators and high-current processors
— John Zhang, BeiLuo
Frequently Asked Questions
How do I parallel VTM48EF040T200A00 modules?
Paralleling VTM modules for higher current: Enable droop load sharing between parallel units; Use identical modules from same production batch; Connect all inputs in parallel to common bus; Connect all outputs in parallel to common output bus. Bus bar design: Use low-impedance bus bars sized for total current; Maintain symmetry in connections; Calculate resistance for <1mV difference between modules. Example: For 800A with four 200A modules: Each module sees approximately 200A; Use 2mΩ bus resistance for 1mV droop at 500A. Vicor provides paralleling guidelines and bus bar calculators.
Contact us for paralleling guidelines and bus bar design assistance.
What is the thermal performance of VTM48EF040T200A00?
Thermal performance of VTM48EF040T200A00: Power dissipation at 200A, 1V out, 97% efficiency: P_loss = 200W x (1/0.97 - 1) = 6.2W; Thermal resistance: Junction to thermal pad ~0.5°C/W; Max case temperature: Limited by internal components; Operating range: -40°C to +125°C case temperature. Cooling options: Air cooling with heatsink for lower power; Liquid cooling cold plate for full power; Direct attachment to board heatsink. Thermal design: Calculate required thermal resistance; Ensure adequate cooling capacity; Monitor case temperature in system.
Contact us for thermal design support and cooling recommendations.
How does VTM efficiency compare to traditional converters?
VTM vs traditional converter efficiency: VTM efficiency: Up to 97% peak; Traditional 48V-1V converter: Typically 88-92% efficiency; Improvement: 5-9 percentage points higher with VTM. Why VTM is more efficient: Fixed-ratio transformation is simpler than regulation; Zero-voltage switching minimizes switching losses; High-frequency operation with optimized magnetics; No need for output filtering inductors. System-level impact: For 100A at 1V: Traditional converter loss = 12W; VTM loss = 3W; 75% reduction in losses means significantly less cooling required.
Contact us for efficiency comparison and system-level analysis for your application.
What is the startup behavior of VTM48EF040T200A00?
VTM startup characteristics: Soft-start: Configurable rise time typically 1-5ms; Pre-bias startup: Can start with voltage present on output; Inrush current: Limited by internal circuitry; Turn-on delay: Typically 5-10ms after enable. Startup sequence: Enable signal received; Internal circuits initialize; Output voltage ramps with soft-start; Full current available after soft-start complete. Pre-bias capability: VTM can start into capacitive loads; Output follows input ratio during soft-start; No damage from pre-existing voltage on output. This enables reliable startup in complex systems.
Contact us for startup timing configuration and system startup sequencing guidance.
Can VTM modules be used without a PRM?
Using VTM without PRM: Yes, VTM modules can operate directly from a 48V bus; Input voltage range: 38-55V for standard VTMs; Output follows input ratio (e.g., 48V in = 1V out at 1/48 ratio). Limitations without PRM: No output voltage regulation - output varies with input; No dynamic voltage positioning; Full system functionality limited. When to use PRM: When output voltage regulation is required; For dynamic voltage scaling; To optimize efficiency across load range. For applications where input voltage is stable and fixed ratio is acceptable, direct VTM operation can be cost-effective.
Contact us for guidance on using VTM with or without PRM based on your requirements.