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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > AC DC Converters, Offline Switches

Infineon Technologies CYPAP212A1-14SXIT

Name: CYPAP212A1-14SXIT
Brand: Infineon Technologies
SKU: CYPAP212A1-14SXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYPAP212A1-14SXIT

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: CYPAP212A1-14SXIT.pdf

Description:: PRIMARY SIDE STARTUP CONTROLLER

Quantity:: RFQ Add To RFQ list

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Inventory:2,000

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Product details

Overview

CYPAP212A1-14SXIT 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, 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.

For engineers reviewing the CYPAP212A1-14SXIT datasheet, CYPAP212A1-14SXIT pinout, CYPAP212A1-14SXIT application, or CYPAP212A1-14SXIT equivalent, key selection criteria include HV start-up capability (500 V max), integrated VCC boost switch, SOVP via OVP_AUX, dual-threshold current sense (CSTH1/CSTH2), and X-cap discharge control in ACF mode.

Technical Context

EZ-PD™ PAG2P operates in two primary configurations: low-side switch with snubber (QR/DCM/CCM) or half-bridge non-complementary mode (Active Clamp Flyback). It receives synchronized PWM pulses via PULSEIN from secondary-side controllers and uses internal high-voltage JFET for start-up current sourcing from HV pin.

The IC integrates line UVP/OVP (via HV), auxiliary winding overvoltage protection (OVP_AUX), VCC short protection (VCCPSP), and soft-start controlled by external RT (50 kΩ) and SS (0.1 μF typical) components - enabling ~41.67 ms ramp to 70% duty cycle.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	85–265 VAC universal mains; supports both X-cap and non-X-cap topologies with HV pin rated to 500 V.
Oscillator Frequency	30 kHz typical; set by 50 kΩ resistor on RT pin; enables predictable timing for soft-start and fault response.
Soft-Start Time	~41.67 ms with 0.1 μF capacitor on SS pin; linear ramp from 1% to 70% duty cycle up to 3.75 V threshold.
Current Sense Thresholds	Dual thresholds: CSTH1 (pulse-by-pulse OCP), CSTH2 (short-circuit shutdown); enables graded fault handling.
VCC Boost Switch	Integrated HV NFET on BSW/BGND pins; eliminates need for external LDO and supports variable output voltage designs.
Auxiliary OVP	Monitors OVP_AUX pin during startup/open-loop; triggers shutdown if voltage exceeds V_OVPAUXRISE; protects secondary side.

Pinout & Package

Package: SOIC-14 (surface-mount, 150 mil width).

Pin/Terminal	Circuit Role	Design Meaning
HV	High-voltage start-up supply input	Accepts up to 500 V; powers IC during startup; enables X-cap discharge in ACF mode.
GDH	High-side gate driver logic output	Drives external floating high-side driver IC; supports non-complementary half-bridge operation.
PULSEIN	Pulse-edge transformer (PET) synchronization input	Receives isolated PWM pulses from secondary controller (e.g., PAG2S); enables precise primary-side timing alignment.
SS	Soft-start ramp capacitor terminal	Connects to external capacitor; controls soft-start duration and duty-cycle ramp profile (0–3.75 V).
RT	Oscillator timing resistor terminal	Connects to 50 kΩ resistor; sets free-running oscillator frequency at 30 kHz.
GDL	Low-side FET gate driver output	Directly drives primary-side low-side MOSFET; supports QR/DCM/CCM and ACF topologies.
CS	Primary-side current sense input	Monitors RSENSE voltage; triggers OCP/SCP using dual-threshold detection (CSTH1/CSTH2).
OVP_AUX	Auxiliary winding overvoltage detection input	Reads resistor-divider voltage from transformer aux winding; initiates shutdown if > V_OVPAUXRISE during startup.
BSW / BGND	Internal boost converter switch node / return	BSW connects to boost inductor/diode; BGND ties to source of internal HV NFET; enables self-powered VCC regulation.

Key Features

Feature	Design Value
X-cap discharge capability	Enables active X-cap discharge via HV pin in ACF mode, eliminating need for passive bleed resistors and improving standby efficiency.
Secondary synchronization	Uses PET-based isolation to receive real-time PWM signals from PAG2S/PAG1S, allowing full secondary-side regulation takeover after startup.
Integrated VCC boost converter	On-chip HV NFET (BSW/BGND) + external inductor/diode generates regulated VCC without external LDO - simplifies BOM and supports wide output voltage range.
Dual-threshold current protection	Separate CSTH1 (pulse-by-pulse) and CSTH2 (latched short-circuit) thresholds enable responsive yet stable overcurrent handling across load transients and faults.
VCC short protection (VCCPSP)	Limits HV-to-VCC start-up current to I_HV_VCCSTG when VCC is shorted to GND, preventing thermal damage during assembly or field failure.

Applications

USB-C PD Power Adapter

Active Clamp Flyback (ACF) Charger

Use Scenario: Compact 30–65 W USB-C PD adapter for smartphones and laptops using secondary-controlled flyback with isolation barrier.

IC Role / Device Role / Timing Role: Primary-side startup controller that initiates power-up, drives low-side FET, and synchronizes to PAG2S PWM pulses via PET during regulation.

Use Value: Enables zero-voltage switching (ZVS) in ACF mode, reduces leakage energy loss, and achieves >94% efficiency at full load.

Use Scenario: High-efficiency wall charger with X-capacitor safety discharge requirement per IEC 62368-1.

IC Role / Device Role / Timing Role: Controls HV pin to actively discharge X-cap through internal path during plug-out, replacing passive resistor networks.

Use Value: Reduces standby power by >30 mW vs. passive discharge; meets strict no-load consumption targets (<30 mW).

Universal Input AC/DC Adapter

Multi-Output Flyback Converter

Use Scenario: 100–240 VAC input adapter powering multiple rails (e.g., 5 V/9 V/15 V/20 V) via secondary-side digital control.

IC Role / Device Role / Timing Role: Provides robust start-up under brownout conditions (UVP), line OVP, and seamless handover to secondary controller after soft-start completion.

Use Value: Ensures reliable cold-start down to 85 VAC and prevents damage during surges up to 265 VAC + margin.

Use Scenario: Dual-output (VBUS + AUX) flyback supplying USB-C PD and system management MCU simultaneously.

IC Role / Device Role / Timing Role: Delivers precise SOVP via OVP_AUX pin using aux winding feedback, protecting secondary outputs independently of main regulation loop.

Use Value: Prevents overvoltage on AUX rail during light-load or open-loop conditions, avoiding downstream component stress.

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
CYPAP211A1-14SXIT	Same SOIC-14 package and pinout; lacks X-cap discharge mode support; only supports non-X-cap topology.	Restricted to standard bridge-rectified input; cannot replace CYPAP212A1-14SXIT in ACF/X-cap discharge designs.	Select only when X-cap discharge is not required and cost sensitivity outweighs topology flexibility.
ICE5QSBG	Infineon quasi-resonant controller with integrated 650 V MOSFET; no PET interface or secondary sync; standalone primary-side regulation.	Used in simpler QR flyback designs without secondary-side digital control; no USB PD or ACF support.	Choose for cost-optimized, single-controller QR solutions where secondary-side intelligence is unnecessary.

Compared with CYPAP211A1-14SXIT, this part adds X-cap discharge and ACF compatibility; versus ICE5QSBG, it enables tighter regulation accuracy and dynamic load response via secondary coordination - critical for USB PD compliance.

Availability

CYPAP212A1-14SXIT is available at Aetrix Electronics and suitable for USB-C PD power adapters, Active Clamp Flyback chargers, and universal-input AC/DC converters requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for CYPAP212A1-14SXIT 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 MCUs, and high-voltage analog ICs, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q100.

This device belongs to the EZ-PD™ PAG2P product line, designed specifically for secondary-controlled, digitally regulated AC/DC power adapters targeting USB Power Delivery compliance and high-density charging solutions.

FAQ

What is the maximum voltage rating on the HV pin?

The HV pin is rated for continuous operation up to 500 V. During startup, it draws current from the rectified AC line or directly from AC mains via diodes. The internal high-voltage JFET limits current to prevent overstress, and UVLO/OVP circuitry ensures safe operation across 85–265 VAC inputs. This rating enables direct connection to bridge rectifier outputs without external voltage dividers.

How does CYPAP212A1-14SXIT achieve X-cap discharge?

CYPAP212A1-14SXIT discharges X-capacitors by routing the HV pin to the AC line through diodes in X-cap mode. When the AC input is removed, the IC activates an internal discharge path through the HV pin, sinking current from the X-cap into the internal shunt regulator. This replaces passive bleed resistors, reducing no-load power consumption and meeting IEC 62368-1 safety requirements without added BOM cost.

Can CYPAP212A1-14SXIT operate without a secondary controller?

No - CYPAP212A1-14SXIT is designed exclusively for secondary-controlled flyback topologies. It relies on PWM pulses received via PULSEIN from Infineon's PAG2S or PAG1S controllers to regulate output voltage after startup. Without those pulses, the IC remains in open-loop soft-start mode and cannot maintain stable regulation; it will trigger SOVP or OCP and shut down.

What external components are mandatory for basic operation?

Mandatory components include: (1) 50 kΩ resistor on RT pin for 30 kHz oscillator, (2) 0.1 μF capacitor on SS pin for 41.67 ms soft-start, (3) current-sense resistor (RSENSE) on CS pin, (4) boost inductor and Schottky diode connected between BSW and VCC, and (5) resistor divider on OVP_AUX for auxiliary overvoltage detection. The HV pin requires direct connection to rectified DC or AC line via diodes depending on topology.

CYPAP212A1-14SXIT 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

CYPAP212A1-14SXIT FAQ

1.How can I place an order for CYPAP212A1-14SXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CYPAP212A1-14SXIT 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 CYPAP212A1-14SXIT reliable?

The price and inventory of CYPAP212A1-14SXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPAP212A1-14SXIT is usually 5 days.

3.What payment methods are accepted for CYPAP212A1-14SXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPAP212A1-14SXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYPAP212A1-14SXIT?

CYPAP212A1-14SXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYPAP212A1-14SXIT 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 CYPAP212A1-14SXIT?

For technical support, including CYPAP212A1-14SXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPAP212A1-14SXIT requirements.

6.How does Aetrix verify that CYPAP212A1-14SXIT is sourced from the original manufacturer or authorized distributors?

All CYPAP212A1-14SXIT 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 CYPAP212A1-14SXIT meets industry standards.

7.What is the process for return or replacement of CYPAP212A1-14SXIT?

All CYPAP212A1-14SXIT units undergo pre-shipment inspection (PSI). If there is an issue with CYPAP212A1-14SXIT, 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 CYPAP212A1-14SXIT part is unused and in its original packaging.

Return procedure for CYPAP212A1-14SXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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