Why do you say it is omnipotent. Its fields of application are very wide.
From the earliest expansion docks, hubs, as shown below
To the later Nintendo Switch game dock and Nintendo Switch Bluetooth transmitter.
Then to the later Type-C portable display, Type-C desktop display.
Gallium nitride adapter + HUB
There is also a Type-C projector,
VR/AR, Type-C charging converter while listening to music,
including robot applications.
The above applications are all real customers.
Why such a small chip has such a powerful function, let's first look at the following breakdown
Support USB PD 2.0 and compatible with USB PD 3.0
◇ Both TYPE-C interfaces support DRP function
◇ PDO and REQUEST negotiation between transparent transmission adapter and smart device (computer, tablet, mobile phone)
◇ Automatically convert DR_SWAP to UFP mode
◇ Through the VDM negotiation application, let the smart device enter the ALT MODE to support DP output
◇ Provide configurable power allocation function, which can reserve 5W/10W/15W different power for the system
◇ Provide peripheral reset control function, provide reset signal for peripherals
◇ When there is no host plugged in, the second voltage of the adapter is applied by default (can be used as a fast charging hub)
Then these three states are on the schematic diagram, how to understand and how to work?
Inserting a picture here to describe
LDR6023 is easier to understand, as can be seen from the picture above. Before you start, you have to figure out the CC agreement. Type-C communicates through the CC protocol first, and then starts to work (when the signal device is inserted, A5 and B5 in the figure below will be linked to the corresponding pins of our chip LDR6023, and LDR6023 has a pull-down 5.1K to complete the protocol communication). Take a closer look, the first state is similar to inserting a picture description here.
When our chip detects that the CC is successfully established, it will start working. At the same time, LDR6023 will give a high frequency on the VBUS-EN PIN to turn on the MOS 2N7200. After the 2N7200 is turned on, it will pull down the MOS AO4805. In this way, the VBS of the signal device will be turned on. But VADP-EN has a low power frequency, MOS 2N7200 is disconnected, and MOS AO4805 is off.
If you need more information, my V signal is: the number of 135, the middle is 107, and the back is 67895. Welcome to exchange and discuss.
Table 4-1 Power allocation table
RS1 RS0 Reserved Power (W) Remarks
1 1 0W default, built-in pull-up
1 0 5W Pin9 pull down 10K, Pin10 floating
0 1 10W Pin9 floating, Pin10 pull down 10K
0 0 15W Pin9 and pin10 both pull down 10K
LDR6023A pin function description
No. Name Type Function Description
1 VSS ground chip ground
2 VBEN Output VBUS enable
3 HPD input
DP input application pin, high level enables DP signal output
4 LENS input
DP mode configuration, 10k resistor pull-down means only supports 4lane, floating table
Show 2lane
5 VadpEN Output adapter VBUS input enable
6 ResetOut output
It is used to reset the peripherals that need to be reset, such as some hubs.
Normally it is high level, when the output is reset, it is pulled high, and the hub is reset through the triode
7 C0CC2 Input/output C0 port CC2 channel level detection
8 C0CC1 Input/output C0 port CC1 channel level detection
9 RES0 input is used to configure the power allocation scheme during power transparent transmission, see 4.3
10 RES1 output
It is used to configure the power allocation scheme during power transparent transmission, see 4.3
11 C1DT Input C1 port VBUS detection
12 C1CC2 Input/output C1 port CC2 channel level detection
13 C1CC1 Input/output C1 port CC1 channel level detection
14 POL output C0 port lock direction, low level means CC1, high level means CC2
15 PDLDO output USB PD communication LDO external capacitor interface