CTS 6.6KW Bidirectional OBC 2.5KW DCDC converter Integrated BC
The CTS3670-M16 series combines a 6.6kW onboard charger with a 2.5kW isolated DCDC converter in a single air-cooled, automotive-grade package. Wide 90–290VAC input, full digital control, and CAN communication make it ideal for passenger and commercial EV platforms.
6.6kW Bidirectional On-Board Charger
,2.5KW DCDC converter Integrated BC
,DCDC converter On-Board Charger
The CTS3670-M16 series combines a 6.6kW onboard charger with a 2.5kW isolated DCDC converter in a single air-cooled, automotive-grade package. Wide 90–290VAC input, full digital control, and CAN communication make it ideal for passenger and commercial EV platforms.
The CTS3670-M16 is a board-level integrated charger that combines an active-PFC onboard charger (OBC) and an isolated DCDC converter into a single air-cooled assembly. By using discrete magnetic components on the power board, CTS achieves higher reliability and easier servicing compared with resin-potted alternatives.
Full digital control, automotive-grade PCB design, and comprehensive hardware + software protection make the unit suitable for demanding EV platforms where reliability under vibration, temperature, and moisture is non-negotiable.
The unit supports CAN communication with Bootloader-based firmware updates, allowing field-upgradeable parameters without hardware changes.
Functional Block Diagram
AC Port 90-290VAC EMI + PFC Active PFC DCDC 1 Isolated Rectify Filter HV DC Battery DCDC 2 Isolated LV DC 14V / 2.5kW Control 1 Power MCU Control 2 System MCU CAN / Boot Diagnostics Aux PSU 24V SysEvery design decision is driven by field-proven EV powertrain requirements: wide input tolerance, fault tolerance, and serviceable hardware.
Board-Level Integration
Discrete magnetic components mounted on the power board instead of resin potting, delivering higher reliability and easier field servicing.
Automotive Digital Control
Full-digital modular power design with automotive-grade PCB layout, ensuring stable control loops under all load and temperature conditions.
Wide-Range Active PFC
Active PFC stage accepts 90–290VAC across the full input range, compliant with global grid voltages and improving input power factor.
Dual-Layer Protection
Comprehensive protection implemented in both hardware and firmware — overvoltage, overcurrent, overtemperature, and short-circuit — for fault-tolerant operation.
CAN + Bootloader
Standard CAN communication interface with Bootloader support enables remote diagnostics and firmware updates without hardware replacement.
Air-Cooled, IP67 Ready
Dedicated fan and finned heat sink allow a fully sealed IP67 integrated assembly, suitable for under-hood and chassis-mount EV environments.
Five voltage-platform variants are available to match different battery architectures. All models share the same mechanical footprint and input range.
| Model | Vin Range | HV Power | HV Output | HV Range | LV Power | LV Output |
|---|---|---|---|---|---|---|
| CTS3671-M16-XX | 90~290 VAC | 6.6 kW | 720V / 9A | 500–900 VDC | 2.5 kW | 14V / 178A |
| CTS3672-M16-XX | 90~290 VAC | 6.6 kW | 540V / 12A | 400–750 VDC | 2.5 kW | 14V / 178A |
| CTS3673-M16-XX | 90~290 VAC | 6.6 kW | 360V / 18A | 250–500 VDC | 2.5 kW | 14V / 178A |
| CTS3674-M16-XX | 90~290 VAC | 6.6 kW | 144V / 44A | 100–180 VDC | 2.5 kW | 14V / 178A |
| CTS3675-M16-XX | 90~290 VAC | 6.6 kW | 108V / 60A | 80–140 VDC | 2.5 kW | 14V / 178A |
A single mechanical footprint across all five electrical variants simplifies integration for platform engineering teams.
From passenger cars to commercial vehicles and off-highway equipment, the CTS3670-M16 covers the most common 6.6kW OBC use cases.
Passenger EVs
BEV and PHEV platforms in the 400V and 800V class.
Commercial Vehicles
Electric vans, trucks, and buses with overnight charging.
Off-Highway & AGV
Industrial, mining, and autonomous guided vehicle fleets.
V2L / V2G Systems
Bidirectional energy export for emergency backup and grid services.
Our engineering team supports OEM customization on HV range, CAN protocol mapping, and mechanical mounting. Send us your specification and we will respond within one business day.
info@ctscharger.com
