ICE1PCS02G vs INN3678C-H606-TL: Component Comparison for Power Conversion Designs
Quick verdict
For continuous conduction mode (CCM) PFC front-ends operating around 65kHz with through-hole assembly, the ICE1PCS02G is the simpler, more straightforward choice, especially when ease of debugging and robust thermal handling are priorities. In contrast, the INN3678C-H606-TL excels in isolated, flyback secondary-side synchronous rectification at up to 75 W and 70kHz, offering integrated switching and fault protection in a compact surface-mount module, making it ideal for isolated offline power supplies with tight space constraints.
Spec comparison table
| Spec | ICE1PCS02G | INN3678C-H606-TL | Notes |
|---|---|---|---|
| Current Startup | 100 µA | Not specified | Low startup current (100 µA) reduces losses during startup and allows lower biasing power on ICE1PCS02G. |
| Mode | Continuous Conduction Mode (CCM) | Flyback, Secondary Side SR | Different topologies: ICE1PCS02G is for CCM PFC; INN3678C-H606-TL targets isolated flyback SR. |
| Mounting Type | Through Hole | Surface Mount | Through-hole (ICE1PCS02G) facilitates prototyping and rework; SMD (INN3678C-H606-TL) enables compact, automated assembly. |
| Operating Temperature Range | -40°C to 125°C | -40°C to 105°C (TA) | ICE1PCS02G supports higher max ambient temperature, potentially better for high-temp environments. |
| Package Case | 8-DIP (7.62 mm wide) | 24-PowerSMD Module (10.8 mm wide), 17 leads | INN3678C-H606-TL is larger and more complex package; ICE1PCS02G simpler DIP package. |
| Supplier Device Package | PG-DIP-8-12 | InSOP-24D | Package differences impact PCB layout and assembly choices. |
| Switching Frequency (typ) | 65 kHz | 70 kHz | Frequencies close; 70 kHz may allow smaller magnetics on INN3678C-H606-TL but at possible increased switching losses. |
| Voltage Supply | 10.2 V to 21 V | Not specified | ICE1PCS02G requires external supply in 10.2–21 V range; INN3678C-H606-TL supply voltage details not provided. |
| Fault Protection | Not specified | Current Limiting, Over Temperature, Over Voltage | INN3678C-H606-TL integrates multiple protections, reducing external circuitry. |
| Internal Switch | No | Yes | INN3678C-H606-TL contains internal switching transistor, simplifying design and reducing component count. |
| Output Isolation | No | Yes | INN3678C-H606-TL supports isolated power conversion; ICE1PCS02G is for non-isolated PFC stage. |
| Power Watts | Not specified | 75 W | INN3678C-H606-TL rated for 75 W output power, suitable for mid-power isolated supplies. |
| Voltage Breakdown | Not specified | 750 V | INN3678C-H606-TL withstands 750 V, suitable for offline line voltages; ICE1PCS02G voltage rating not specified here. |
Design trade-offs
The ICE1PCS02G is a dedicated PFC controller IC optimized for continuous conduction mode at 65 kHz switching frequency, with a low startup current of 100 µA. This low startup current reduces power consumption during no-load or standby conditions, which is beneficial for meeting energy efficiency standards. The through-hole PG-DIP-8 package simplifies prototyping and manual assembly but limits high-density PCB layouts. The 125°C maximum operating temperature rating provides some headroom for thermal stress, useful in industrial or harsh environments.
In contrast, the INN3678C-H606-TL is a flyback secondary-side synchronous rectifier controller with an integrated switch, designed for isolated power supplies up to 75 W and switching at 70 kHz. Its surface-mount 24-lead InSOP package is significantly larger in footprint but enables automated assembly and compact layouts. The built-in fault protections (current limiting, over-temperature, over-voltage) reduce external component count and improve system reliability but require careful thermal management due to the internal power device. The maximum ambient temperature rating of 105°C is typical for SMD power modules but lower than ICE1PCS02G, necessitating more conservative thermal design.
From a layout perspective, ICE1PCS02G’s through-hole package simplifies manual rework and debugging but increases parasitic inductances compared to the INN3678C-H606-TL’s surface-mount design, which benefits high-frequency switching performance and EMI control. The integrated switch on the INN3678C-H606-TL reduces overall system complexity and BOM but demands careful PCB thermal management and possibly a heat sink or thermal vias to maintain junction temperature within limits.
Gate drive requirements differ fundamentally: the ICE1PCS02G is a controller IC needing an external power MOSFET, which allows selecting a transistor tailored to the load and efficiency goals, enabling optimization of conduction and switching losses. The INN3678C-H606-TL’s integrated switch simplifies driver design but locks in the device’s conduction characteristics, which may not be ideal for all load conditions.
Cost-wise, the ICE1PCS02G plus discrete MOSFET will generally have a lower unit cost in very high volumes due to simpler packaging and component sourcing but increases PCB area and assembly complexity. The INN3678C-H606-TL’s integrated nature and protection features may justify a higher cost with reduced design risk and faster time-to-market for isolated flyback converters.
Use-case fit
Choose ICE1PCS02G when…
- Designing a non-isolated CCM PFC stage for AC-DC power supplies targeting 65 kHz switching frequency.
- Prototyping or low-volume production where through-hole assembly facilitates debugging and rework.
- Operating environments with higher ambient temperatures up to 125°C requiring robust thermal tolerance.
- You need precise control over the external MOSFET choice to optimize efficiency or cost.
- Your design targets moderate power levels without isolation and benefits from low startup current to minimize standby losses.
Choose INN3678C-H606-TL when…
- Implementing an isolated offline flyback converter with secondary-side synchronous rectification, up to 75 W output power.
- Needing integrated fault protection (current limit, over-voltage, over-temperature) to simplify system design and enhance safety.
- Space-constrained designs requiring surface-mount components and compact PCB footprints.
- Prefer an integrated switching device to reduce component count and simplify gate drive circuitry.
- Designing for isolated power supplies where a 750 V voltage breakdown capability is required for line-side robustness.
Drop-in compatibility
These two devices are not pin-compatible or footprint-compatible. The ICE1PCS02G is an 8-pin through-hole DIP package intended as a PFC controller for continuous conduction mode, whereas the INN3678C-H606-TL is a 24-lead surface-mount module with integrated switch for isolated flyback secondary-side synchronous rectification. Substituting one for the other would require a complete redesign of the power stage topology, PCB layout, and supporting components. No direct drop-in replacement is possible.
Alternatives to consider
- STMicroelectronics L6562: CCM PFC controller with integrated startup, suitable for 65–100 kHz switching frequencies, offering a similar application space as ICE1PCS02G but with different package options.
- Power Integrations InnoSwitch3-CP: Integrated offline flyback controller with primary-side regulation and built-in protections, a competitor to INN3678C-H606-TL for isolated power supplies but with different control topology.
- Texas Instruments UCC28070: Dual-mode PFC controller supporting CCM and DCM, providing flexibility for efficiency optimization with external MOSFETs, targeting similar applications as ICE1PCS02G.