RoadTest: Test and Review the P.I. 60W ultra-compact USB PD 3.0 Charger RDK
Author: fyaocn
Creation date:
Evaluation Type: Development Boards & Tools
Did you receive all parts the manufacturer stated would be included in the package?: True
What other parts do you consider comparable to this product?: PI InnoSwitch 3
What were the biggest problems encountered?: No problems.
Detailed Review:
Examine the effectiveness of the PCB layout and component selection in ensuring proper operation and compliance with EMI/EMC standards. Verify that the 60 W USB PD 3.0 power supply in the RDK - 928 kit meets the specified electrical performance requirements, including input voltage range, output voltage accuracy, output current capabilities, efficiency, and ripple limits. Evaluate the power supply's performance under different load conditions, input voltages, and environmental temperatures.
AC Power Source: Capable of providing a variable AC voltage in the range of 90 - 265 VAC with a frequency of 47 - 64 Hz. Since the maximum power of 60W, use one AC power variable switch.
Electronic Load: Able to simulate different load currents for each output voltage setting (5 V/3 A, 9 V/3 A, 15 V/3 A, 20 V/3 A). There is one portable constant current electrical loadfor this mobile power charge testing
Oscilloscope or mobile charger tester, : In this case, one portable mobile charger tester 0-24V and 0-5A is better fit,
AC Power Meter: To measure input power, output power, and efficiency. One socket type AC power meter can read voltage , current , frequency
Multimeter: For general voltage, current, and resistance measurements. The Fluke 87V like multimeter is a reliable choice.
Test conditions,
Ambient Temperature: Conduct most tests at room temperature (20 - 25 °C).
Input Voltage: Test the power supply at the minimum input voltage (90 VAC), nominal input voltages (115 VAC and 230 VAC), and the maximum input voltage (265 VAC).
Load Conditions: No - load: Measure the input power and output voltage ripple with no load connected to the power supply. Full - load: Apply the maximum rated load current for each output voltage setting (e.g., 3 A for 5 V, 9 V, 15 V, and 20 V outputs). and Partial - load: Test at 25%, 50%, and 75% of the full - load current for each output voltage to evaluate load regulation.
Here is the RDK-928 kit , front view and backward view
There are key com[onent
In comparing with previous product in mobile charger
PI GaN Control chipset SC1933,
one of INN3307 serial of InnoSwitch3-Pro
The control logic block is
There have been many improvement for InnoSwitch 4 INN4073C-H181 | Power Integrations
The maximum power increases to 75W and more green technology shall be applied. For this serial of product with PowerGaN technology, 220W output can be reached.
The InnoSwitch
4-CZ family of ICs partners with the ClampZero family of active clamp ICs to dramatically improve the efficiency of flyback power converters. The InnoSwitch4-CZ family incorporates primary and secondary controllers and safety-rated feedback into a single IC. This greatly reduces system and primary switch losses, allowing for extremely high power densities. InnoSwitch4-CZ also incorporates multiple protection features including output overvoltage and over-current limiting, and over-temperature shutdown. Devices are available that support the common combinations of latching and auto-restart protection mode required by applications such as chargers, adapters, consumer electronics and industrial systems. Most widely applied products are high performance mobile charger. One typical diagram for notebook computer power supply as
This RDK-928 kit is fully tested demonstration solution for mobile charger, this is optimized for 65W power delivery in many PD protocol.
The compact design into compact size
Connect the power supply to the AC power source at different input voltages as 115 VAC, and 230 VAC (The maximum voltage of 90 VAC, and 265 VAC are not tested, according to the test, the output is fairly stable even within the voltage range).
Connect the electronic load to the power supply's output with the appropriate load current for each output voltage setting 5 V/3 A ( 9 V/3 A, 15 V/3 A, 20 V/3 A can be tested in this configuration and runs OK, only that the PD cheating shall be used for voltage modification). Read the output
No load state while the electrical load is off.
start from 0.2A
increate to 1.01A,
Increase to 1.50A, the output voltage drops a little to 5.06V
That works well in this stage. in 2A and 3A as well , the output voltage is stable around 5.04V
Output Voltage Ripple test,Use an oscilloscope with a modified probe (as described in the RDR - 928 documentation) to measure the output voltage ripple as the document explained. Measure the ripple at different input voltages (90 VAC, 115 VAC, 230 VAC, 265 VAC) and load conditions (no - load, full - load) for each output voltage setting. While in this test, the specific meter can measure ripple internally
The bandwidth of 2MHz are as low as 9mV, and normally 11mV for 5 V, 9 V, 15 V at 2 MHz bandwidth. Furthermore, for reference dynamic voltage vs current diagram can be shown as well,
The supported protocol can be read directly with updated firmware for the mobile charger tester, it starts to polling the protocol tests automatically.
When finished, the Following protocol are supported,
Apple 5V/2.4A
Samsung DCP, AFC
Oppo, Oneplus, VOOC, DASH
Huawei FCP, SCP
QC 1.0 and QC 3.0
The QC can supported up to 5V, 9V, 12V and 20V
With previous experience in Inno-switch 3, the Thermal withstanding capacity is excellent. It works well within normal temperature up to 40 degree, and keep stable output even 40+.
The variation of input AC voltage has little impact on low power DC output. The smart control solution for Inno-switch 4 keeps the RDK-928 kit always running stable.
The test result is perfect and most of the recorded results under tests are better than the nominal parameter..
Special care shall be made sine HV voltage is imported.
Ensure that all test equipment is properly grounded to avoid electrical hazards.
When handling high - voltage components or performing high - voltage tests , wear appropriate safety gear, including insulated gloves and safety glasses.
