Cypress/MPS EZ-PD USB Type-C Power Bank Test Report
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1 Cypress/MPS EZ-PD USB Type-C Power Bank Test Report INTRODUCTION: This test report provides efficiency and thermal detailed data for the EZ-PD USB Type-C Power Bank reference design. The EZ-PD TM CCG3 Power Bank reference design has a portable external battery which stores charge when connected to a charger and later delivers charge to an attached device. This solution has a USB Type-C receptacle which acts as a power source or sink and a legacy USB Type-A receptacle which acts as a power source. The main features of this solution are: USB Type-C port acting as a source and sink supporting USB Power Delivery spec 3.0 USB Type-A port acting as source supporting legacy charging protocols: BC v1.2, Quick Charge 3.0 Provides up to 18W (12V@1.5A, 9V@2A, 5V@3A) on the Type-C port Supports 1-Cell battery configuration Supports firmware upgrade for CCG3: CC/USB The CCG3 fully supports the latest Power Delivery 3.0 specification. The CCG3 integrates USB Type-C, USB Power Delivery, Over Voltage and Over Current protection, and high-voltage regulator reducing the BOM cost. CCG3 device is available in 40-QFN package. Other major components in the design are MPS's MP2636 (Single Cell Battery Charger) and MP9184A (Boost Convertor).
2 DOCUMENTATION: The EZ-PD USB-C Power Bank schematic, PCB layout, Gerber files, and BOM can be found at TEST EQUIPMENTS: Digital Multimeters (DMM) Fluke DC Power Supply Agilent A3624A Electronic Load Kikusui Infrared Camera Flir i7 Lenovo 45W USB-C AC-DC Adapter Apple 29W USB-C AC-DC Adapter Custom Li-Ion Battery: 3.6V 18.2Ah (66wh, 7A rate, 7S/S, ICR18650B4). STANDBY CURRENT: Parameter Test Conditions Typ Unit Isb Vbatt=3.5V, all ports unattached 2 ma CHARGE MODE EFFICIENCY on the USB Type-C Port: Charging Measurement Set Up:
3 Efficiency (%) Type C Charging w/ Vin=5V 93.00% 92.00% 91.00% 90.00% 89.00% 88.00% 87.00% 86.00% 85.00% 84.00% 83.00% 82.00% Ibatt (A) Vbatt=3.8V Vbatt=3.5V Vbatt=3.2V Figure 1: Charging USB Type-C VBUSin = 5V Vin=5V, Vbatt=3.2V Vin (V) Iin (A) Vbatt (V) Ibatt (A) Eff (%) % % % Vin=5V, Vbatt=3.5V Vin (V) Iin (A) Vbatt (V) Ibatt (A) Eff (%) % % % Vin=5V, Vbatt=3.8V Vin (V) Iin (A) Vbatt (V) Ibatt (A) Eff (%) % % % Note: Vin is USB Type-C VBUSin
4 Efficiency (%) DISCHARGE EFFICIENCY TYPE C PORT: Type C Discharge Measurement Set Up: 94.00% 92.00% 90.00% Type C Discharging w/ Vout=5V and Iout=3A 88.00% 86.00% 84.00% Vbatt=3.2V Vbatt=3.5V Vbatt=3.8V 82.00% 80.00% Iout (A) Figure 2: USB Type C Discharging VBUSout=5V and Iout=3A
5 Vbatt=3.2V, Vbus=5V % % % % % % % % % % % Vbatt=3.5V, Vbus=5V % % % % % % % % % % % Vbatt=3.8V, Vbus=5V % % % % % % % % % % %
6 Efficiency (%) Type C Discharging w/ Vout=9V and Iout=2A 95.00% 90.00% 85.00% 80.00% 75.00% Vbatt=3.2V Vbatt=3.5V Vbatt=3.8V 70.00% Iout (A) Figure 3: USB Type C Discharging VBUSout=9V and Iout=2A Vbatt=3.2V, Vbus=9V % % % % % % % % % % % Vbatt=3.5V, Vbus=9V % % % % % % % % %
7 Efficiency (%) % % Vbatt=3.8V, Vbus=9V % % % % % % % % % % % 95.00% Type C Discharging w/ Vout=12V and Iout=1.5A 90.00% 85.00% 80.00% 75.00% Vbatt=3.2V Vbatt=3.5V Vbatt=3.8V 70.00% 65.00% Figure 4: USB Type C Discharging VBUSout=12V and Iout=1.5A Iout (A) Vbatt=3.2V, Vbus=12V % % % % % %
8 % % % % % Vbatt=3.5V, Vbus=12V % % % % % % % % % % % Vbatt=3.8V, Vbus=12V % % % % % % % % % % %
9 Efficiency (%) DISCHARGE EFFICIENCY TYPE A PORT: Type A Discharge Measurement Set Up: 96.00% 95.00% 94.00% Type A Discharging w/ Vout=5V and Iout=2.4A 93.00% 92.00% 91.00% Vbatt=3.2V Vbatt=3.5V Vbatt=3.8V 90.00% 89.00% Iout (A) Figure 5: USB Type A Discharging VBUSout=5V and Iout=2.4A Vbatt=3.2V, Vbus=5V % % % % % % %
10 Efficiency (%) Vbatt=3.5V, Vbus=5V % % % % % % % Vbatt=3.8V, Vbus=5V % % % % % % % 93.00% 92.00% 91.00% 90.00% Type A Discharging w/ Vout=9V and Iout=1.5A 89.00% 88.00% 87.00% Vbatt=3.2V Vbatt=3.5V Vbatt=3.8V 86.00% 85.00% Iout (A) Figure 6: USB Type A Discharging VBUSout=9V and Iout=1.5A Vbatt=3.2V, Vbus=9V % %
11 % % % % Vbatt=3.5V, Vbus=9V % % % % % % Vbatt=3.8V, Vbus=9V % % % % % % THERMAL: Charging: Vin=4.93V, Iin=2.47A, Vbatt=3.8V, Ibatt=2.947A; Focused on part no. MP2636 Figure 7: Thermals on MP2636
12 Discharging Type C: Vbatt=3.2V, Ibatt=6.466A, Vbus=12.15V, Ibus=1.5A; Focused on part no. MP9184A Figure 8: Thermals on MP9184A (Type-C) Discharging Type A: Vbatt=3.2V, Ibatt=4.774A, Vbus=9.26V, Ibus=1.5A; Focused on part no. MP9184A Figure 9:: Thermals on MP9184A (Type-A)
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