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Infineon Technologies CYPAP211A1-14SXIT
- Part No.:
- CYPAP211A1-14SXIT
- Manufacturer:
- Infineon Technologies
- Category:
- AC DC Converters, Offline Switches
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CYPAP211A1-14SXIT.pdf
- Description:
- PRIMARY SIDE STARTUP CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
CYPAP211A1-14SXIT 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 frequency, and dual-mode operation (X-cap discharge or non-X-cap). It drives low-side FETs directly, interfaces with secondary controllers via pulse-edge transformer (PET), and enables Active Clamp Flyback (ACF) topology in USB PD mobile adapters.
For engineers reviewing the CYPAP211A1-14SXIT datasheet, CYPAP211A1-14SXIT pinout, CYPAP211A1-14SXIT application, or CYPAP211A1-14SXIT equivalent, key selection criteria include HV start-up capability (500 V max), integrated VCC boost switch, auxiliary winding overvoltage protection (OVP_AUX), soft-start ramp control (SS pin), and dual-gate driver support (GDH/GDL) for ACF or QR/DCM/CCM topologies.
Technical Context
The CYPAP211A1-14SXIT implements a secondary-synchronized control architecture where primary-side switching is managed only during startup and fault recovery-normal regulation is delegated to the secondary-side controller (e.g., EZ-PD™ PAG2S/PAG1S) via PET-coupled PWM pulses on PULSEIN. Its high-voltage start-up block draws current from the HV pin (≤500 V) to charge VCC until auxiliary winding takeover.
It supports two operational modes: X-cap mode (HV connected directly to AC mains via diodes for active X-cap discharge) and non-X-cap mode (HV tied to rectified DC bus). Protection logic includes line UVP/OVP, SOVP via OVP_AUX, pulse-by-pulse and short-circuit OCP on CS, and VCC short protection (VCCPSP) limiting HV current to I_HV_VCCSTG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–265 VAC universal mains; enables global adapter compliance without hardware reconfiguration. |
| Oscillator Frequency | 30 kHz typical; sets base switching frequency during startup before secondary synchronization. |
| HV Pin Rating | 500 V max; allows direct connection to AC mains or bridge rectifier output without external voltage divider. |
| Soft-Start Ramp Max | 3.75 V; defines maximum duty cycle (70%) and enables controlled output voltage ramp using external CSS. |
| OVP_AUX Threshold | V_OVPAUXRISE (value specified in datasheet); triggers shutdown if auxiliary winding voltage exceeds safe secondary regulation limit. |
| VCC Boost Switch | Integrated HV NFET on BSW/BGND; eliminates need for external LDO by generating regulated VCC across wide output voltage range. |
| Current Sense Inputs | CS pin with dual thresholds CSTH1 (pulse-by-pulse OCP) and CSTH2 (SCP); enables fast primary-side fault response independent of secondary timing. |
Pinout & Package
Package: SOIC-14 (surface-mount, 150 mil width, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HV | High-voltage start-up supply input | Accepts up to 500 V; powers internal start-up circuitry before auxiliary winding takeover; enables X-cap discharge in X-cap mode. |
| GDH | High-side gate driver logic output | Drives external floating high-side driver IC (e.g., for ACF topology); not a direct FET driver. |
| PULSEIN | Pulse-edge transformer (PET) input | Receives isolated PWM pulses from secondary controller (PAG2S/PAG1S); synchronizes primary switching post-startup. |
| SS | Soft-start capacitor terminal | Connects to external capacitor (e.g., 0.1 μF); controls soft-start duration (e.g., ~41.67 ms) via internal 4.8 μA current source. |
| RT | Oscillator timing resistor input | Connects to 50 kΩ resistor; sets free-running oscillator frequency at 30 kHz during startup phase. |
| GDL | Low-side gate driver output | Directly drives primary-side low-side MOSFET gate; supports QR/DCM/CCM and ACF configurations. |
| CS | Primary current sense input | Monitors RSENSE voltage; triggers OCP/SCP by disabling GDL when CSTH1 or CSTH2 threshold exceeded. |
| OVP_AUX | Auxiliary winding overvoltage detection | Inputs scaled auxiliary voltage; initiates shutdown if secondary overvoltage detected during startup or open-loop operation. |
| BSW / BGND | Boost converter switch node / return | BSW connects to internal HV NFET drain; BGND to source; forms integrated boost stage for VCC generation. |
Key Features
| Feature | Design Value |
|---|---|
| X-cap discharge capability | Enables active discharge of EMI filter X-capacitors via HV pin in X-cap mode-eliminates need for bleed resistors and improves no-load efficiency. |
| Dual-gate driver architecture | Separate GDH (logic-level high-side driver) and GDL (direct low-side driver) outputs support both ACF and conventional flyback topologies. |
| Integrated VCC boost converter | Internal HV NFET + BSW/BGND pins generate stable VCC across variable output voltages-removes external LDO requirement. |
| Secondary-synchronized operation | Primary switching fully handed off to secondary controller after startup via PET-coupled PULSEIN signal-enables precise cross-regulation and dynamic load response. |
| Multi-level protection suite | Includes line UVP/OVP, SOVP, pulse-by-pulse OCP, SCP, VCC short protection, and auto-restart timer-ensures robust fault recovery without external supervision. |
Applications
| USB-C PD Mobile Adapter | Universal Laptop Charger |
|---|---|
Use Scenario: Compact 30–65 W USB-C power adapter for smartphones and tablets with programmable voltage output (5/9/15/20 V). IC Role / Device Role / Timing Role: Primary-side startup controller that initiates power-up, drives low-side FET, and synchronizes to PAG2S via PET during normal operation. Use Value: Enables zero-voltage switching in ACF mode, reduces snubber losses, and achieves >94% efficiency at full load while meeting CoC Tier 2 and DOE VI standards. | Use Scenario: Multi-port 65–100 W laptop charger supporting simultaneous USB-C PD and legacy USB-A outputs. IC Role / Device Role / Timing Role: Provides primary-side start-up and fault handling while secondary controller manages precise constant-voltage/constant-current regulation and port negotiation. Use Value: Supports dynamic output reconfiguration (e.g., 20 V @ 3 A → 15 V @ 3 A + 5 V @ 3 A) without compromising primary-side stability or protection integrity. |
| Industrial AC/DC Power Module | Smart Home Wall Adapter |
Use Scenario: DIN-rail mountable 24 V/5 A industrial power supply with extended temperature range (−40°C to +105°C) and reinforced isolation. IC Role / Device Role / Timing Role: Primary-side supervisor ensuring reliable cold-start under brownout conditions and rapid fault shutdown during output short or overtemperature events. Use Value: HV start-up (500 V rating) and line OVP/UVP allow operation across unstable utility grids; SOVP prevents secondary-side component overstress during transformer saturation. | Use Scenario: Low-noise, ultra-low standby power (<30 mW) wall adapter for smart speakers, security cameras, and IoT hubs. IC Role / Device Role / Timing Role: Enables X-cap discharge mode to meet IEC 62368-1 touch-current safety requirements while maintaining <75 mW no-load consumption. Use Value: Integrated VCC boost and optimized gate drive reduce auxiliary winding dependency-cutting transformer complexity and improving light-load efficiency by 12% vs. legacy controllers. |
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 |
|---|---|---|---|
| CYPAP212A1-14SXIT | Same SOIC-14 package and pinout; differs only in factory-programmed X-cap mode enablement (CYPAP212 = X-cap mode enabled by default; CYPAP211 = non-X-cap mode enabled). | Requires no external mode-select resistor network; simplifies BOM for X-cap discharge designs but lacks field-configurable mode switching. | Select CYPAP212A1-14SXIT when X-cap discharge is mandatory and board layout must avoid mode-setting components. |
| ICE5QSBG | Fixed-frequency quasi-resonant controller with integrated 650 V MOSFET; no PET interface or secondary synchronization; standalone operation only. | Designed for cost-sensitive single-output adapters without USB PD negotiation; lacks SOVP, VCC boost, and X-cap discharge features. | Choose ICE5QSBG only for basic QR flyback designs where secondary control, efficiency optimization, and safety certification flexibility are not required. |
Compared with CYPAP211A1-14SXIT, CYPAP212A1-14SXIT offers identical functionality with factory-set X-cap mode-reducing design effort but limiting runtime configurability; ICE5QSBG provides lower system cost and integration but sacrifices secondary synchronization, adaptive protection, and USB PD ecosystem compatibility.
Availability
CYPAP211A1-14SXIT is available at Aetrix Electronics and suitable for USB-C PD mobile adapters, universal laptop chargers, and industrial AC/DC power modules requiring stable component supply, long-term lifecycle support, and certified safety compliance.
Supply support for CYPAP211A1-14SXIT 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 portfolio coverage from silicon to SiC and GaN solutions.
CYPAP211A1-14SXIT belongs to the EZ-PD™ PAG2P product line, engineered specifically for secondary-controlled flyback architectures in high-efficiency, safety-certified USB Power Delivery adapters-emphasizing startup reliability, X-cap management, and seamless handover to secondary regulation.
FAQ
What is the maximum allowable voltage on the HV pin?
The HV pin supports up to 500 V DC, enabling direct connection to AC mains (via diodes) or bridge rectifier output without external voltage division. This rating applies during startup only; once auxiliary winding supplies VCC, HV pin current drops to near-zero. Exceeding 500 V risks permanent damage to the internal high-voltage JFET start-up circuit.
How does the CYPAP211A1-14SXIT handle X-cap discharge?
In X-cap mode (enabled via external resistor network per datasheet Section 3.3), the HV pin actively sinks current from the X-capacitor through internal circuitry during power-off, discharging it below 60 V within 1 second-meeting IEC 62368-1 touch-current safety limits. No external bleed resistors or relays are required, reducing BOM count and no-load power loss.
Can the CYPAP211A1-14SXIT operate without a secondary controller?
No-it is designed exclusively for secondary-controlled flyback topologies and requires continuous PET-coupled PWM signals on PULSEIN for normal regulation. Without PULSEIN input, it defaults to free-running 30 kHz operation with soft-start-limited duty cycle (max 70%), insufficient for stable output regulation beyond brief startup or fault recovery periods.
What is the purpose of the BSW and BGND pins?
BSW and BGND form the terminals of an integrated high-voltage boost converter: BSW connects to the drain of an internal 600 V NFET, and BGND connects to its source. When driven by external inductor/diode, this stage generates regulated VCC from varying output voltages-eliminating the need for a separate LDO and enabling operation across wide output ranges (e.g., 5–20 V) without auxiliary winding redesign.
CYPAP211A1-14SXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-PD™
- Package/Case:
- 14-SOIC (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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PG-DSO-14-800
- Mounting Type:
- Surface Mount
CYPAP211A1-14SXIT FAQ
1.How can I place an order for CYPAP211A1-14SXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CYPAP211A1-14SXIT 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 CYPAP211A1-14SXIT reliable?
The price and inventory of CYPAP211A1-14SXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPAP211A1-14SXIT is usually 5 days.
3.What payment methods are accepted for CYPAP211A1-14SXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPAP211A1-14SXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYPAP211A1-14SXIT?
CYPAP211A1-14SXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYPAP211A1-14SXIT 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 CYPAP211A1-14SXIT?
For technical support, including CYPAP211A1-14SXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPAP211A1-14SXIT requirements.
6.How does Aetrix verify that CYPAP211A1-14SXIT is sourced from the original manufacturer or authorized distributors?
All CYPAP211A1-14SXIT 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 CYPAP211A1-14SXIT meets industry standards.
7.What is the process for return or replacement of CYPAP211A1-14SXIT?
All CYPAP211A1-14SXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPAP211A1-14SXIT, 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 CYPAP211A1-14SXIT part is unused and in its original packaging.
Return procedure for CYPAP211A1-14SXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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