HDMI2C1-6C1 Datasheet, PDF (10/23 Pages) STMicroelectronics – ESD protection and signal booster for HDMI source control stage interface

Application information
HDMI2C1-6C1
In case either the current limiter or the OTP is triggered, a logic signal is sent over the fault
line in order to inform the HDMI™ ASIC that an abnormal situation has been detected
(option).
An under voltage lockout (UVLO) is also integrated in the block. It checks the main +5 V
power supply state, and enable the +5V_OUT only if the main power supply has reach a
minimal value V_{DD_5V_ON}.
The Figure 9 shows the functional diagram of the current limiter block.
Figure 9. +5V functional block diagram
VDD_IC
5V
VDD_5V
HDMI
ASIC
or
IC
RPU_FAULT
FAULT
Current
sensor
UVLO
Low drop current limiter
OTP
Ctrl
HDMI
connector
+5V_OUT
1
2
3
4
5
6
7
8
9
10
11
13
12
14
15
17
16
19
18
To summarize, the short circuit protection and the over temperature protection features
provide a high robustness level of the application. On top of this, the fault line can be used in
order to improve the user experience.
The 5V_OUT pin integrates a protection against ESD which is compliant with IEC61000-4-2
standard, level 4 (8 kV contact). The decoupling capacitance is mandatory, according to the
power management state of the art.
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