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Infineon Technologies CYPAP211A1-14SXI
- Part No.:
- CYPAP211A1-14SXI
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CYPAP211A1-14SXI.pdf
- Description:
- PRIMARY SIDE STARTUP CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:1,040
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Product details
Overview
CYPAP211A1-14SXI from Infineon is a primary-side startup controller for secondary-controlled AC/DC flyback adapters, supporting universal 85–265 VAC input, 30 kHz free-running oscillator, and dual-mode operation (X-cap discharge or non-X-cap). It drives low-side FETs directly, interfaces with secondary controllers (e.g., PAG2S/PAG1S) via pulse-edge transformer (PET), and enables active clamp flyback (ACF) topology in mobile USB PD power adapters.
For engineers reviewing the CYPAP211A1-14SXI datasheet, CYPAP211A1-14SXI pinout, CYPAP211A1-14SXI application, or CYPAP211A1-14SXI equivalent, key selection criteria include HV start-up capability (500 V max), integrated VCC boost switch, SOVP via OVP_AUX pin, dual-threshold current sense (CSTH1/CSTH2), and support for ACF vs. QR/DCM/CCM configurations.
Technical Context
The device implements high-voltage start-up using an internal JFET to charge VCC from the HV pin (≤500 V), then transitions to auxiliary winding supply post-startup. It supports two operational modes: X-cap discharge mode (HV connected pre-rectifier) and non-X-cap mode (HV connected post-rectifier), each with dedicated UVLO and OVP thresholds.
Control logic synchronizes primary switching to secondary PWM pulses received at PULSEIN, while maintaining autonomous control during startup and fault conditions. The RT pin sets oscillator frequency (~30 kHz) via 50 kΩ resistor; SS pin controls soft-start ramp (0–3.75 V) with typical 41.67 ms duration using 0.1 μF capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 85–265 VAC universal mains; enables global adapter deployment without hardware change. |
| Oscillator frequency | ~30 kHz set by 50 kΩ RT resistor; determines base switching timing during startup. |
| HV pin rating | 500 V max; allows direct connection to rectified DC bus or AC line via diodes for X-cap discharge. |
| Soft-start ramp | 0–3.75 V linear ramp; controls duty cycle from 1% to 70% to limit inrush current. |
| Current sense thresholds | CSTH1 (pulse-by-pulse OCP) and CSTH2 (short-circuit shutdown); enable fast primary-side fault response. |
| VCC boost switch | Integrated HV NFET on BSW/BGND pins; eliminates external LDO for wide output voltage adaptability. |
| Auxiliary OVP | Monitored at OVP_AUX pin during startup/open-loop; triggers shutdown if auxiliary winding exceeds V_OVPAUXRISE. |
Pinout & Package
Package: SOIC-14 (surface-mount, 150 mil width, standard JEDEC MS-012).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HV | High-voltage start-up supply input | Accepts up to 500 V; powers IC during startup before auxiliary winding takes over. |
| GDH | High-side gate driver logic output | Drives external floating high-side driver IC (e.g., for ACF topology). |
| PULSEIN | Pulse-edge transformer (PET) synchronization input | Receives isolated PWM pulses from secondary controller to synchronize primary switching. |
| SS | Soft-start ramp capacitor terminal | Connects to external capacitor; defines soft-start duration and duty-cycle ramp profile. |
| RT | Timing resistor connection | Sets free-running oscillator frequency (~30 kHz) with 50 kΩ resistor. |
| GDL | Low-side FET gate driver output | Directly drives primary-side low-side MOSFET in QR/DCM/CCM or ACF topologies. |
| CS | Primary current sense input | Enables pulse-by-pulse OCP (CSTH1) and short-circuit shutdown (CSTH2). |
| VCC | Low-voltage supply input | Internal regulator input; supported by integrated boost converter via BSW/BGND. |
| BSW / BGND | Boost converter switch node / return | Forms internal boost switch (BSW = drain, BGND = source); replaces external LDO. |
| OVP_AUX | Auxiliary winding overvoltage detection | Monitors secondary-side voltage via resistor divider; triggers OVP during startup only. |
Key Features
| Feature | Design Value |
|---|---|
| X-cap discharge capability | Enables active X-cap discharge via HV pin in ACF topology, eliminating passive bleed resistors and improving standby efficiency. |
| Dual-threshold current protection | Separate CSTH1 (fast pulse-by-pulse) and CSTH2 (latched short-circuit) thresholds ensure robust primary-side fault handling. |
| VCC boost integration | On-chip HV NFET (BSW/BGND) supplies regulated VCC across wide output voltage ranges, removing need for external LDO. |
| Secondary-synchronized operation | Primary switching fully follows secondary PWM via PET during regulation, minimizing cross-regulation and improving dynamic response. |
| Startup fault resilience | VCC pin short protection (VCCPSP) limits HV current to I_HV_VCCSTG, preventing thermal runaway during VCC-to-GND shorts. |
Applications
| USB-C PD Mobile Adapter | Universal Wall Charger |
|---|---|
Use Scenario: Compact 20–65 W USB-C PD adapter for smartphones and tablets with programmable output voltage. IC Role / Device Role / Timing Role: Primary-side startup controller that initiates power-up, drives low-side FET, and synchronizes to PAG2S/PAG1S secondary PWM signals via PET. Use Value: Enables zero-voltage switching in ACF mode, achieving >94% efficiency at full load and <30 mW no-load consumption. | Use Scenario: Multi-port wall charger supporting simultaneous USB-A + USB-C outputs with independent regulation. IC Role / Device Role / Timing Role: Provides primary-side start-up and fault management while secondary controllers handle precise V/I regulation per port. Use Value: Reduces bill-of-materials by integrating HV start-up, VCC boost, and dual OCP thresholds-eliminating 4 discrete components. |
| Active Clamp Flyback (ACF) | QR/DCM Flyback with X-cap Discharge |
Use Scenario: High-efficiency 45–100 W adapter using ACF topology to recycle leakage energy instead of dissipating it in snubbers. IC Role / Device Role / Timing Role: Drives both high-side (via GDH + external driver) and low-side (via GDL) switches in non-complementary half-bridge configuration. Use Value: Improves full-load efficiency by 1.2–1.8% versus conventional flyback and reduces transformer size by enabling higher operating frequency. | Use Scenario: Energy-efficient adapter meeting IEC 62368-1 and UL 62368-1 requirements for X-cap discharge within 1 second. IC Role / Device Role / Timing Role: Uses HV pin to actively discharge X-capacitor after AC removal, replacing passive resistor + relay solutions. Use Value: Achieves <1 s discharge time with <50 mW standby loss, satisfying safety standards without added cost or board space. |
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 |
|---|---|---|---|
| ICE5QSBG | Quasi-resonant controller with integrated 650 V MOSFET; no PET interface or X-cap discharge capability. | Designed for self-oscillating QR flyback only; lacks secondary synchronization and ACF support. | Select when cost-sensitive, single-output designs require integrated FET and no USB PD compliance is needed. |
| UCC28780 | Active-clamp flyback controller with integrated drivers; supports PET sync but requires external HV start-up circuitry. | Needs external HV JFET and bias network; no integrated VCC boost or X-cap discharge logic. | Select for high-power ACF designs where programmable dead-time control and multi-level OCP are required. |
Compared with ICE5QSBG and UCC28780, CYPAP211A1-14SXI uniquely integrates HV start-up, X-cap discharge control, VCC boost, and PET-based secondary synchronization in a single SOIC-14 package-reducing system component count by ≥6 while enabling USB PD-compliant, ultra-low-standby adapters.
Availability
CYPAP211A1-14SXI is available at Aetrix Electronics and suitable for USB-C PD mobile adapters, universal wall chargers, active clamp flyback power supplies, and energy-efficient X-cap discharge compliant designs requiring stable component supply and long-term lifecycle support.
Supply support for CYPAP211A1-14SXI 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 is a German semiconductor leader specializing in power management, automotive, and industrial control ICs, with broad expertise in high-voltage analog and digital power conversion solutions.
CYPAP211A1-14SXI belongs to the EZ-PD™ PAG2P product line, engineered specifically for secondary-controlled AC/DC flyback adapters targeting USB Power Delivery compliance, ultra-low standby power, and active X-cap discharge functionality.
FAQ
What is the maximum voltage rating on the HV pin?
The HV pin is rated for up to 500 V DC. It accepts either rectified DC bus voltage or AC line voltage through diodes, enabling flexible placement in the power stage-pre- or post-bridge rectifier-depending on whether X-cap discharge functionality is required. This rating is validated under continuous operation and transient surge conditions per Infineon's stress testing protocol.
How does CYPAP211A1-14SXI achieve X-cap discharge without external components?
CYPAP211A1-14SXI discharges X-capacitors by routing the HV pin to the AC line via diodes and enabling internal discharge circuitry during power-off. When AC is removed, the IC activates its internal HV switch between HV and BGND, forming a controlled discharge path. No external relay, resistor, or transistor is needed-reducing BOM cost and PCB area while ensuring <1 s discharge per IEC 62368-1.
Can CYPAP211A1-14SXI operate without a secondary controller?
No-it is designed exclusively for secondary-controlled flyback topologies. The IC relies on PWM pulses received at PULSEIN from a companion secondary-side controller (e.g., PAG2S or PAG1S) for regulation. During startup or fault conditions, it operates autonomously using its internal oscillator, but sustained regulation requires PET-based synchronization; standalone operation is not supported.
What is the function of the BSW and BGND pins?
BSW and BGND form the integrated boost converter switch node: BSW is the drain of an internal HV NFET, and BGND is its source. Connected to an external inductor and diode, this circuit generates a regulated VCC supply from the main DC bus-eliminating the need for an external LDO. This allows stable operation across wide output voltage ranges (e.g., 5–20 V USB PD profiles) without redesigning the bias network.
CYPAP211A1-14SXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PG-DSO-14-800
- Mounting Type:
- Surface Mount
CYPAP211A1-14SXI FAQ
1.How can I place an order for CYPAP211A1-14SXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPAP211A1-14SXI 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 CYPAP211A1-14SXI reliable?
The price and inventory of CYPAP211A1-14SXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPAP211A1-14SXI is usually 5 days.
3.What payment methods are accepted for CYPAP211A1-14SXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPAP211A1-14SXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPAP211A1-14SXI?
CYPAP211A1-14SXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPAP211A1-14SXI 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 CYPAP211A1-14SXI?
For technical support, including CYPAP211A1-14SXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPAP211A1-14SXI requirements.
6.How does Aetrix verify that CYPAP211A1-14SXI is sourced from the original manufacturer or authorized distributors?
All CYPAP211A1-14SXI 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 CYPAP211A1-14SXI meets industry standards.
7.What is the process for return or replacement of CYPAP211A1-14SXI?
All CYPAP211A1-14SXI units undergo pre-shipment inspection (PSI). If there is an issue with CYPAP211A1-14SXI, 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 CYPAP211A1-14SXI part is unused and in its original packaging.
Return procedure for CYPAP211A1-14SXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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