Table of Contents
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Introduction ...................................................................................................... 2
AP33771C Sink Controller ............................................................................... 3
2.1
Package Pinout .................................................................................................................. 3
2.2
Pin Descriptions ................................................................................................................. 3
AP33771C EVB Descriptions .......................................................................... 4
3.1
EVB Schematics ................................................................................................................. 4
3.2
EVB TOP View .................................................................................................................... 4
3.3
EVB Quick Setup ................................................................................................................ 5
3.4
EVB Function Description ................................................................................................. 6
3.5
EVB System BOM ............................................................................................................... 7
USB PD Source-to-Sink Application Examples ............................................. 8
Compliance test ............................................................................................. 10
Design Considerations .................................................................................. 11
6.1
Termination of CC1/CC2 channels .................................................................................. 11
6.2
ESD Considerations ......................................................................................................... 11
Revision History ............................................................................................. 11
AP33771C EVB User Guide
Rev. 1.0
Table of Contents
1 of 12
www.diodes.com
AP33771C
EVB User Guide
© 2024 Copyright Diodes Incorporated. All Rights Reserved.
July 2024
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Summary of Contents for Diodes AP33771C
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Page 1: Table Of Contents
Design Considerations .................. 11 Termination of CC1/CC2 channels .................. 11 ESD Considerations ......................11 Chapter 7. Revision History ..................... 11 1 of 12 AP33771C EVB User Guide July 2024 www.diodes.com © 2024 Copyright Diodes Incorporated. All Rights Reserved. Rev. 1.0... -
Page 2: Chapter 1. Introduction
Type-C to Type-C cable. Figure 1 illustrates a TCD embedded with a PD3.1 sink controller IC (i.e. AP33771C). This is physically connected to a PDC, embedded with a USB PD3.1 source controller (e.g. AP43771) through a suitable Type-C to Type-C cable. Based on the USB PD3.1 compliance protocol, the AP33771C may go through the USB PD3.1 standard negotiation process with the AP43771, and then the TCD will retrieve... -
Page 3: Chapter 2. Ap33771C Sink Controller
Terminal for VOUT monitoring. PWR_EN To control external VOUT. Connected to external NMOS switch, ON (High) or OFF (Low). The power supply of the AP33771C. A 1µF cap is required to connect this pin to GND pin. ISENP Current sense positive node. -
Page 4: Chapter 3. Ap33771C Evb Descriptions
If some of the PDO is matched, the MOS switch is turned on to connect VBUS to VOUT. The AP33771C supports dead-battery functionality and can be woken up as soon as an active PD adaptor is plugged in the TCD Type-C receptacle. -
Page 5: Evb Quick Setup
Step 3: Connect the Type-C connector to a USB PD adaptor (PDC), and power on EVB with the USB PD adaptor (D2/D7 will be illuminated) The AP33771C Evaluation Board will output the requested voltage and current on the load after the above steps. -
Page 6: Evb Function Description
3A, a suitable e-Marker cable with over 3A current rating is necessary. LED for System State Indication The AP33771C’s LED pin is used to reflect the system’s states. Below, Table 4 summarizes the LED indications and VOUT ON/OFF for each corresponding state. State... -
Page 7: Evb System Bom
CC Flip Test Point The AP33771C uses the FLIP pin for CC flip indication, as shown in Table 5 below. If the CC is not flipped, the FLIP pin output is low. If the CC is flipped, the FLIP pin output is high. -
Page 8: Chapter 4. Usb Pd Source-To-Sink Application Examples
Step 1: set VSEL to “26KΩ” to get 28V, set ISEL to “82KΩ” to get 1.5A. Step 2: AP33771C starts to handshake with the powered PDC as soon as a Type-C cable is connected. Step 3: according to Matching Mechanism, APDO 15V~28V/45W can match ISEL. - Page 9 Step 1: set VSEL to “26KΩ” to get 28V, set ISEL to “66KΩ” to get 2A. Step 2: AP33771C starts to handshake with the powered PDC as soon as a Type-C cable is connected. Step 3: according to Matching Mechanism, 28V can’t match ISEL, search for PDOs below 28V.
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Page 10: Chapter 5. Compliance Test
EVB User Guide Chapter 5. Compliance test The AP33771C EVB passes all test items in Ellisys USB-PD Compliance tester, as shown in Figure 7 below. Figure 7 – Ellisys USB PD test environment and test item list 10 of 12... -
Page 11: Chapter 6. Design Considerations
Since the AP33771C has no internal Rd resistor embedded, the designer must place a 5.1K ohm resistor on both CC1 and CC2 to GND, as shown in Figure 8 below. A lack of any Rd will cause the AP33771C to misrecognize the direction of the CC, and will not enter into the PD negotiation process. -
Page 12: Important Notice
Diodes assumes no liability for any application-related information, support, assistance or feedback that may be provided by Diodes from time to time. Any customer or user of this document or products described herein will assume all risks and liabilities associated with such use, and will hold Diodes and all companies whose products are represented herein or on Diodes’...
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