1.5W, 5kVRMS Complete Isolated DC-DC Converter

The CA-IS3115AW is a family of complete isolated DC-DC converters with up to 5kVRMS isolation rating. These devices integrate most of the components needed for an isolated power supply —switching controller, power switches, transformer, soft-start, protection circuit etc. — into a single, compact SOIC package. The result is an efficient and compact fully integrated solution that is easy to comply with EMI requirements and makes power-supply isolation design as easy as possible. Operating over an input voltage range of 4.5V to 5.5V, the CA-IS3115AW devices provide a fixed output voltage of 3.3V, 3.7V, 5V or 5.4V set by pin SEL. 3.7V and 5.4V output options provide headroom voltage to power an LDO. Only output, input bypass capacitors, and a pull-up resistor for 3.7V or 5.4V outputs are needed to finish the design.

The CA-IS3115AW devices feature a unique control scheme, which can quickly respond to load transient and accurately regulate the output voltage. The devices are capable of delivering a load up to 1.5W output power and offering soft-start, current limit, short-circuit protection and thermal shutdown protection features to better enhance the reliability of the system. The CA-IS3115AW devices include an enable input pin (EN). Connect the EN pin to the VINP input voltage or force this pin high to turn on the DCDC converter. Force this pin low to disable the device and enter shutdown mode. In shutdown mode, the device stops switching operation with microampere standby supply current.

The CA-IS3115AW devices are available in wide-body SOIC16 package with creepage and clearance > 8mm, and operate over -40°C to +125°C temperature range.

These devices offer a ready-made, reliable, easy-to-use solution and allow users save PCB space and reduce design time for the popular 5V, 3.3V power supply systems. These devices are provided with a robust overcurrent protection scheme that protects the devices under overload and output short-circuit conditions. A cycle-by-cycle peak current limit turns off the switching operation and triggers hiccup mode. Once the hiccup timeout period expires, soft-start is attempted again. Hiccup mode operation ensures low power dissipation under output short-circuit conditions.

1 Features

• Complete Switch Mode Power Supply
  • High integration with internal transformer
  • Soft-start reduces input inrush current and output overshoot
  • Hiccup current-limit protection
  • Thermal shutdown
• 4.5 V to 5.5 V Input Voltage Range
• Selectable Output voltages
  • 3.3V and 5V output options
  • 3.7V and 5.4V output options provide headroom voltage to power LDO
• Delivers up to 1.5W(5V/300mA) Typical Output Power
• Excellent Load Transient Response
• Complies with CISPR32 Class B Radiated Emissions
• Up to ±3kV HBM and ±2kV CDM ESD protection
• Robust Galvanic Isolation Barrier
  • High lifetime: > 40 years
  • Up to 5kVRMS isolation rating
  • ▪ ±150 kV/μs typical CMTI
• Wide Operating Temperature Range: -40°C to 125°C
• Low Profile SOIC16-WB (10.30mm × 7.50) Package
• Safety-Related Certifications (Pending)
  • VDE certification according to DIN EN IEC6074717(VDE 0884-17):2021-10
  • UL certification according to UL1577
  • CQC certification according to GB4843.1-2022

2 Applications

• Instruments and Apparatuses
• Industrial automation
• Motor Control
• Medical Equipment
• Industrial Sensors
• Telecom Equipment