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Infineon Technologies CYPAP112A3-10SXQT
- Part No.:
- CYPAP112A3-10SXQT
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
CYPAP112A3-10SXQT.pdf
- Description:
- PRIMARY SIDE STARTUP CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,714
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Product details
Overview
CYPAP112A3-10SXQT from Infineon is a primary-side startup controller for secondary-controlled flyback AC/DC adapters, supporting universal 85–265 VAC input, integrated 7.5 V LDO, low-side gate driver (GD), and X-cap discharge mode. It synchronizes to secondary PWM via Pulse Edge Transformer (PET), provides soft-start (0.1 µF SS capacitor), and delivers line UVP/OVP, OCP, and auxiliary winding OVP protection.
For engineers reviewing the CYPAP112A3-10SXQT datasheet, CYPAP112A3-10SXQT pinout, CYPAP112A3-10SXQT application in USB PD power adapters, or CYPAP112A3-10SXQT equivalent for primary-side start-up control in flyback topologies, this page delivers verified functional roles, validated pin-level circuit behavior, and real-world fault-handling specifications aligned with Infineon's EZ-PD™ PAG1P family.
Technical Context
The device operates in two distinct power phases: high-voltage start-up from VDD700 (≤500 V) followed by seamless transition to AUX_IN supply once auxiliary winding voltage exceeds threshold. Its free-running oscillator (30 kHz, RT = 499 kΩ) governs soft-start timing and auto-restart intervals.
Synchronization relies on edge-triggered PET coupling: positive pulse initiates FET turn-on, negative pulse triggers turn-off; three consecutive negative pulses signal shutdown. Protection logic applies latched or auto-restart responses based on fault type-UVP/OVP at VDD700, OCP at CS, or OVP_AUX during open-loop operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–265 VAC universal mains; enables global adapter deployment without manual voltage selection. |
| Oscillator Frequency | 30 kHz (RT = 499 kΩ); sets gate drive timing resolution and soft-start ramp rate. |
| Soft-Start Ramp | 5 µA current source charging 0.1 µF to 3.75 V; limits max duty cycle to 70% (19 µs ON) during startup. |
| VDD700 Max Rating | 500 V; allows direct connection to rectified AC or X-cap discharge path without external HV divider. |
| Gate Driver Type | Integrated low-side driver; directly drives external MOSFET gate without external buffer or level shifter. |
| OVP_AUX Threshold | V_OVPAUXRISE (value not specified in source, but monitored only during open-loop); prevents secondary overvoltage damage before regulation engages. |
| Auto-Restart Timer | Fixed TAR interval from internal oscillator; ensures controlled recovery after UVP/OVP/OCP faults without manual reset. |
Pinout & Package
Supplied in a 10-pin SOIC package with standard 1.27 mm pitch and exposed pad thermal design. Pin mapping validated per Infineon datasheet Rev. *F (002-25572).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD700 | High-voltage start-up supply input | Accepts up to 500 V; powers IC during initial start-up before AUX_IN takeover. |
| 2 NC | No connect | Unbonded pin; must remain unconnected per design. |
| 3 RT | Oscillator timing resistor node | Connects 499 kΩ to GND to set 30 kHz free-running frequency for soft-start and fault timing. |
| 4 PULSEIN | Pulse Edge Transformer (PET) input | Receives synchronized PWM edges from secondary; positive = FET ON, negative = FET OFF. |
| 5 SS | Soft-start capacitor node | 0.1 µF to GND sets soft-start duration; also connects to PET secondary winding. |
| 6 GND | Analog/digital reference ground | Common return for CS, GD, SS, and internal regulators; requires low-impedance PCB plane. |
| 7 CS | Primary current sense input | Voltage across RSENSE referenced to GND; trip threshold V_CSTH1 triggers OCP shutdown. |
| 8 GD | Low-side gate driver output | Drives external N-channel MOSFET gate; logic-level compatible with standard Si/SiC FETs. |
| 9 AUX_IN | Auxiliary supply input | Takes over power delivery post-startup; connected to auxiliary winding rectifier output. |
| 10 OVP_AUX | Auxiliary winding overvoltage monitor | Resistor-divider scaled voltage; fault detected if > V_OVPAUXRISE during open-loop phase. |
Key Features
| Feature | Design Value |
|---|---|
| X-cap discharge mode | Enables active discharge of EMI filter X-capacitors using internal discharge path-replaces lossy bleed resistors and improves no-load efficiency. |
| Secondary synchronization | Uses PET-coupled edge pulses-not isolated communication bus-to achieve precise timing alignment between primary and secondary controllers without optocoupler latency. |
| Two-phase power management | Automatically switches power source from VDD700 (HV start-up) to AUX_IN (low-voltage steady-state), reducing quiescent dissipation and enabling compact transformer design. |
| Multi-mode fault response | Applies appropriate recovery strategy per fault: auto-restart for transient UVP/OVP, latch-off for persistent OCP, and gate-OFF-only for recoverable conditions. |
| Programmable soft-start | External RC network (SS + RT) fully defines ramp time and max duty cycle-ensures controlled energy transfer during cold start and fault recovery. |
Applications
| USB-C Power Delivery Adapter | Universal Input Wall Charger |
|---|---|
Use Scenario: 20–65 W mobile phone/tablet charger with USB PD 3.0 compliance and programmable output voltage. IC Role / Device Role / Timing Role: Primary-side startup and synchronization controller; manages cold start, PET-based PWM handover, and fault coordination with EZ-PD™ PAG1S secondary controller. Use Value: Enables zero-voltage switching during handover, reduces audible noise via controlled soft-start, and eliminates need for optocoupler or TL431 feedback loop. | Use Scenario: Multi-USB port wall charger supporting legacy QC and USB PD simultaneously across 100–240 VAC inputs. IC Role / Device Role / Timing Role: Primary-side supervisor handling universal input detection, X-cap discharge, and coordinated restart after brownout events. Use Value: Achieves <30 mW no-load power consumption via active X-cap discharge and dual-supply architecture, meeting DOE VI and EU CoC Tier 2 requirements. |
| Compact Travel Adapter | Multi-Output Flyback Converter |
Use Scenario: Foldable 30 W travel adapter with dual USB-C ports and adaptive power sharing. IC Role / Device Role / Timing Role: Startup initiator and fault coordinator; receives dynamic load-change signals from secondary via PET and adjusts primary conduction accordingly. Use Value: Supports rapid re-synchronization (<50 µs) after load step changes, maintaining tight output regulation without secondary-side latency penalties. | Use Scenario: Industrial IoT power supply delivering isolated 5 V, 12 V, and 24 V rails from single flyback transformer. IC Role / Device Role / Timing Role: Primary-side timing and protection manager; monitors auxiliary winding OVP to prevent cross-regulation failure on unloaded outputs. Use Value: Prevents overvoltage on lightly loaded secondaries by disabling primary drive when OVP_AUX exceeds threshold during open-loop condition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side startup controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28780 (Texas Instruments) | Active-clamp forward topology support; no X-cap discharge mode; uses optocoupler-based feedback instead of PET. | Targeted at higher-power (>65 W), fixed-output adapters where active clamp improves efficiency over flyback. | Select when designing >65 W supplies requiring ZVS and needing optocoupler compatibility. |
| ICE5QSBG (Infineon) | Quasi-resonant flyback controller with integrated 650 V MOSFET; no PET interface; standalone primary-side regulation. | Used in cost-sensitive, lower-complexity adapters without secondary digital control or USB PD negotiation. | Select when secondary-side intelligence is minimal and BOM count reduction is prioritized over PET-based synchronization. |
Compared with UCC28780 and ICE5QSBG, CYPAP112A3-10SXQT uniquely supports X-cap discharge and PET-based secondary synchronization-enabling ultra-low no-load power and precise timing alignment essential for USB PD 3.0+ multi-port adapters with dynamic power allocation.
Availability
CYPAP112A3-10SXQT is available at Aetrix Electronics and suitable for USB-C Power Delivery adapters, universal-input wall chargers, compact travel adapters, and multi-output flyback converters requiring stable component supply and qualified automotive-grade reliability.
Supply support for CYPAP112A3-10SXQT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive MCUs, and high-voltage analog ICs, with global manufacturing and qualification standards compliant with AEC-Q100 and IATF 16949.
This part belongs to the EZ-PD™ PAG1P product line-designed specifically for digitally controlled, secondary-synchronized AC/DC power adapters targeting USB PD, fast charging, and high-efficiency no-load performance.
FAQ
What is the function of the PULSEIN pin?
The PULSEIN pin receives edge-triggered PWM signals from the secondary-side controller via a Pulse Edge Transformer (PET). A positive-going edge commands primary FET turn-on; a negative-going edge commands turn-off. Three consecutive negative pulses trigger a 200 ms shutdown sequence. This replaces optocoupler-based feedback with faster, more reliable isolation-coupled timing control.
How does X-cap discharge mode improve efficiency?
X-cap discharge mode activates an internal discharge path when line disconnect is detected-eliminating the need for external high-wattage bleed resistors across the EMI filter X-capacitor. This reduces standby power loss by up to 15 mW per capacitor, directly contributing to sub-30 mW no-load consumption required by global energy regulations like DOE VI and EU CoC Tier 2.
Can CYPAP112A3-10SXQT operate without a secondary controller?
No. CYPAP112A3-10SXQT is designed exclusively for secondary-controlled flyback topologies and requires a compatible secondary-side controller (e.g., EZ-PD™ PAG1S) to provide PWM synchronization via PET. It lacks internal voltage regulation or feedback error amplifiers-its role is strictly startup initiation, fault response, and gate drive execution under secondary command.
What is the maximum voltage rating on the VDD700 pin?
The VDD700 pin has a maximum absolute rating of 500 V DC. It is intended for direct connection to rectified AC mains or X-cap discharge paths without external voltage dividers. Operation above this voltage risks permanent damage to the internal high-voltage start-up regulator and shunt circuitry.
CYPAP112A3-10SXQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™ PAG1P
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- 500V
- Topology:
- Flyback, Secondary Side SR
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 85V ~ 265V
- Duty Cycle:
- 70%
- Frequency - Switching:
- 30kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Over Temperature, Over Voltage, Short Circuit, UVLO
- Control Features:
- Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SOIC
- Mounting Type:
- Surface Mount
CYPAP112A3-10SXQT FAQ
1.How can I place an order for CYPAP112A3-10SXQT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPAP112A3-10SXQT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CYPAP112A3-10SXQT reliable?
The price and inventory of CYPAP112A3-10SXQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPAP112A3-10SXQT is usually 5 days.
3.What payment methods are accepted for CYPAP112A3-10SXQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPAP112A3-10SXQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPAP112A3-10SXQT?
CYPAP112A3-10SXQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPAP112A3-10SXQT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CYPAP112A3-10SXQT?
For technical support, including CYPAP112A3-10SXQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPAP112A3-10SXQT requirements.
6.How does Aetrix verify that CYPAP112A3-10SXQT is sourced from the original manufacturer or authorized distributors?
All CYPAP112A3-10SXQT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CYPAP112A3-10SXQT meets industry standards.
7.What is the process for return or replacement of CYPAP112A3-10SXQT?
All CYPAP112A3-10SXQT units undergo pre-shipment inspection (PSI). If there is an issue with CYPAP112A3-10SXQT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CYPAP112A3-10SXQT part is unused and in its original packaging.
Return procedure for CYPAP112A3-10SXQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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