Infineon EZ-PD PAG2S-2P User manual

User guide
Please read the sections “Important notice” and “Warnings” at the end of this document
002-39511 Rev. **
www.infineon.com
2024-02-15
EZ-PD™PAG2S-2P 65 W high-frequency active
clamp flyback charger and adapter solution
user guide
REF_65W_HFACF_PAG2
About this document
Scope and purpose
This document provides instructions and a quick start guide for the EZ-PD™PAG2S-2P controller-based Type-C
charger and adapter solution (REF_65W_HFACF_PAG2).
Intended audience
This document is primarily intended for EZ-PD™PAG2S-2P high-frequency active clamp flyback (ACF) charger
and adapter solution developers.

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Table of contents
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 2
1Introduction .......................................................................................................................... 3
2Specifications........................................................................................................................ 5
3Board overview...................................................................................................................... 6
4Test setup ............................................................................................................................. 9
4.1 Test equipment .......................................................................................................................................9
4.2 Power adapter tester (PAT)...................................................................................................................10
5Quick steps for demo.............................................................................................................11
References....................................................................................................................................12
Revision history.............................................................................................................................13
Disclaimer.....................................................................................................................................14

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Introduction
1Introduction
The Active Clamp Flyback (ACF) converter is a popular flyback topology that offers ZVS for the FETs. This topology
is suitable for higher frequency operation than the QR flyback because of the ZVS operation. There is also a
complete energy recovery in transformer leakage inductance, which is dissipated in the QR flyback RCD clamp.
ACF also has good electromagnetic interference (EMI) performance regarding ZVS operation and clamping of the
primary FET voltage through the clamp capacitor.
There are two types of ACF control modes: Complementary (CP) and noncomplementary (NCP). In the CP mode,
the main flyback and clamp switches are turned on/off alternatively to complement each otherin every switching
cycle, and the transformer current waveform is sinusoidal. Both the main flyback and clamp switches are under
ZVS switching. In the CP mode, the switching frequency rises with load decrease. This may have an impact on
light load and standby efficiency as well as EMI. Additionally, the full resonant current in the resonant tank
increases the conduction loss in the transformer.
To overcome the increased conduction loss and improve the light-load efficiency, use the noncomplementary
mode. This mode operates the active clamp FET so that it only turns on to accumulate enough magnetic energy
to ensure the main FET ZVS operation. This way, the circulating clampcapacitor currents are mitigated to output.
A few analog ACF controllers exist in the market. Some of them can only support either CP or NCP, but not both
types of operation.
Secondary Side
Isolation Barrier
Primary Side
EMI
Filter
Full-bridge
Rectifier
HV
VCC
USB Type-C Connector
CC1
CC2
DP_GPIO
DM_GPIO
VBUS_TypeC
EZ-PDPAG2S
SR_DRV
SR_SEN
PWM_DRV
SR_CPP
SR_CPN
VBUS_IN
VBUS_CTRL
CSN
CSP
VBUS_C
VDDD
VCCD
VBUS_IN
Temperature
Sensor
GPIO
CC_COMP_GPIO
EA_OUT
FB
AC input
RT
GND
EZ-PD
PAG2P
PULSEIN
SS
GD
Driver
GDH
VCC
GND
GD
Vbst
BSW
SW
SR_CAP
Rext
SR_DRAIN
Figure 1 High-level block diagram of EZ-PD™PAG2S-2P REF_65W_HFACF_PAG2 Solution
Infineon provides a comprehensive solution for ACF-based flyback adapters. Specifically, for AC-DC conversion,
Infineon’s EZ-PD™PAG2x-based solution offers two chip solutions:
•EZ-PD™PAG2P primary side startup controller with high and low side PWM drive
•EZ-PD™PAG2S USB PD power adapter secondary side controller with synchronous rectification (SR)
EZ-PD™PAG2S-2P based 65W active clamp flyback charger and adapter demonstrates this highly efficient
topology.

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Introduction
Table 1 Critical components bill of materials (BOM)
Designator
Description
Part number
Manufacturer
U2
EZ-PD™PAG2P primary side
startup controller
CYPAP212A1-14SXQ
Infineon Technologies
U3
EZ-PD™PAG2S USB PD power
adapter secondary side
controller
CYPAS212A1-32LQXQ
Infineon Technologies
U1
High-side gate driver IC non-
inverting
IRS25752LTRPBF
Infineon Technologies
Q1
OptiMOS™N-channel 30 V 19 A
BSZ0902NS
Infineon Technologies
Q4
OptiMOS™6 N-channel 120 V
3.04 mΩ
ISC030N12NM6
Infineon Technologies
Q2, Q3
700 V 150 mΩ E-mode GaN
transistor
GS-065-009-6S-L
Infineon Technologies
T1
118 µH ATQ23.7 power
transformer
EF-239002
Better Magnetics Corp
T2
Pulse edge transformer
ALTWR-C33TF
Infineon Technologies
C2, C3, C4, C5
Capacitor ALUM 33 µF 400 V 8x25
Radial
KCX 33 µF 400 V 8X25
Sh-ymin
C9, C48
Aluminium organic polymer
capacitors 560 µF 25 V (6.3x10)
NPX 560 µF 25 V 6.3x10
Sh-ymin

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Specifications
2Specifications
Table 2 Test specifications
Parameter
Value
Input voltage and frequency
100 to 240 V AC, 47 to 63 Hz
Max output power
65 W, 20 V to 3.25 A max
Output voltage
Fixed PDOs: 5.0 V / 3.0 A, 9.0 V / 3.0 A, 15.0 V / 3.0 A, 20.0 V / 3.25 A
PPS: 5 V to 11 V, 3.0 A; 5 V to 16 V, 3.0 A; 5 V to 21.0 V, 3.25 A with PPS power
limit
Peak efficiency
> 94%
Protections
1. Input overvoltage protection
2. Input undervoltage protection
3. VBUS_C overvoltage protection (OVP)
4. VBUS_C undervoltage protection (UVP)
5. Overcurrent protection (OCP)
6. Short-circuit protection (SCP)
7. Over-temperature protection (OTP)
8. VBUS_C to CC short protection
Charging standards
supported
1. USB-C PD v3.1 including programmable power supply (PPS) mode
2. Apple Charging 2.4 A
3. Qualcomm QC 2.0, 3.0, 4.0, 5.0
4. Samsung AFC
5. USB BC 1.2
EMI/EMC
1. Conducted emissions, CISPR32 CLASS B, 4 dB margin at 115/220 V AC
2. ESD, IEC61000-4-2, ±8 kV contact, ±16 kV air, Criteria A
3. Surge, IEC61000-4-5, ±1 kV DM and ±2 kV CM, Criteria B

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Board overview
3Board overview
The EZ-PD™PAG2S-2P based 65 W active clamp flyback USB PD charger and adapter solution
(REF_65W_HFACF_PAG2) shown in Figure 2 solution board is designed to meet the specifications shown in
Table 2.
Figure 2 REF_65W_HFACF_PAG2 solution board
In this solution, the EZ-PD™PAG2x operates with an optimal frequency of 150 kHz and functions as a
secondary-side flyback, ACF controller, and SR controller. Additionally, a high-side driver is used externally to
drive the ACF/high-side GaN FET. This solution board consists of three boards:
•Baseboard being primary board with EZ-PD™PAG2P and other power components
•EMI Board with filters and bulk capacitors
•Secondary board with EZ-PD™PAG2S, SR MOSFET, and Type-C connector
Figure 3 shows the schematic of EZ-PD™PAG2S-2P based 65 W high frequency active clamp flyback charger and
adapter solution.

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Board overview
Figure 3 EZ-PD™PAG2S-2P REF_65W_HFACF_PAG2 Schematic
EZ-PD™PAG2S uses PSoC™MiniProg4 (CY8CKIT-005) to program the EZ-PD™controllers. The EZ-PD™PAG2S-
based board uses a PSoC™MiniProg4 five-pin connection and a JTAG to Type-C connector board. In this way,
one can simply program the EZ-PD™PAG2S-2P based 65 W active clamp flyback charger and adapter board
using a Type-C connector.
Figure 4 PSoC™MiniProg4 (CY8CKIT-005) Programmer Kit
Programming interface and settings
The PSoC™Programmer software is used as a programming interface to program the firmware (.hex file) in an
EZ-PD™PAG2S-based board. For programming, select the “CCGx” platform and update the settings as shown in
Figure 5.

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Board overview
Figure 5 Programming interface to program EZ-PD™PAG2S board

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Test setup
4Test setup
Figure 6 shows the test setup to capture the electrical data of the DUT. The following is the optimal setup to
capture efficiency by capturing:
•Input power using a power meter
•Output power using high-resolution output multimeters
Figure 6 Test equipment connected to the standalone REF_65W_HFACF_PAG2 board
4.1 Test equipment
Table 3 shows the test equipment to measure performance parameters such as efficiency, ripple, regulation,
and transient response.
Table 3 Test equipment details
Test setup
Description
Programmable AC source
Chroma 61501
AC power meter
Yokogawa WT310E
PAT tester
USBCEE PAT
Electronic load
Chroma 63102A
Multimeters
Keysight 34465A

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Test setup
4.2 Power adapter tester (PAT)
Connect the DUT to a USB-C power adapter tester (PAT) using a USB Type-C cable. After the connection is
established, the PAT UI does a PDO discovery and displays the results.
The EZ-PD™PAG2S-2P based 65 W active clamp flyback charger and adapter solution is pre-configured with
seven PDOs:
•Fixed PDOs: 5.0 V / 3.0 A; 9.0 V / 3.0 A; 15.0 V / 3.0 A; 20.0 V / 3.25 A
•PPS: 5 V to 11 V, 3.0 A; 5 V to 15.0 V, 3.0 A; 5 V to 21.0 V, 3.25 A (PPS power limited)
Choose a suitable pre-configured PDO or configure a new one using the EZ-PD™Configuration Utility. Tests in
the following sections use pre-configured PDOs.
To know more about the PAT tester, see USBCEE.
Figure 7 PAT tester and user interface

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Quick steps for demo
5Quick steps for demo
1. Connect the 65-W solution board to the power meter AC terminal (which is already connected to the
programmable AC supply) as in Figure 6.
2. Connect a USB PD tester or a power adapter tester (PAT) to the port and ensure that the USB PD tester gets
a successful Power Delivery contract as shown in Figure 7.
3. Connect the electronic load at the PAT tester load terminal as in Figure 6.
4. Select the desired voltage on PAT UI and ramp up the load on the electronic load.

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References
References
Datasheets
[1] CYPAP211A1-14SXI EZ-PD™PAG2P, Primary-side startup controller
[2] CYPAS212-32LQXQ EZ-PD™PAG2S-AC integrated USB PD and secondary-side ACF controller

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charger and adapter solution user guide
Revision history
Revision history
Document
revision
Date
Description of changes
**
2024-02-15
Initial release

Important notice
Warnings
Edition 2024-02-15
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2024 Infineon Technologies AG.
All Rights Reserved.
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002-39511 Rev. **
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