AC/DC Charger/Adapter

CT5604D Datasheet

The CT5604D is a family of a high performance Primary Side Regulation (PSR) power switch with high precision CV/CC control ideal for charger applications. The IC can also support Quasi-Resonant (QR) Buck constant current topology for LED lighting if SEL pin is short to GND.

In CV mode, The CT5604D adopts Multi Mode Control which uses the hybrid of AM (Amplitude Modulation) mode and (Frequency Modulation) FM mode to improve system efficiency and reliability. In CC mode, the IC uses PFM control with line and load CC compensation. The IC can achieve audio noise free operation and optimized dynamic response. The built-in Cable Drop Compensation (CDC) function can provide excellent CV performance.

The CT5604D integrates functions and protections of Under Voltage Lockout (UVLO), VCC over Voltage Protection (VCC OVP), Cycle-by-cycle Current Limiting (OCP), Short Load Protection (SLP), and VCC Clamping.

The CT5604D is available in DIP-7 package, and CT5604D/CT5605D are available in DIP-7 package.


  • Integrated with 650V MOSFET
  • Multi Mode PSR Control
  • Audio Noise Free Operation for PSR
  • Optimized Dynamic Response for PSR
  • Low Standby Power <70mW
  • ±4% CC and CV Regulation
  • Programmable Cable Drop Compensation (CDC) in PSR CV Mode
  • Built-in AC Line & Load CC Compensation
  • Build in Protections
    • Short Load Protection (SLP)
    • On-Chip Thermal Shutdown (OTP)
    • Cycle-by-Cycle Current Limiting (OCP)
    • Leading Edge Blanking (LEB)
    • Pin Floating Protection
    • VDD OVP & UVP & Clamp