Denon DHT-391XP Service Manual page 86

Location Mnemonic
138 RXB_1+
139 TVDD
140 RXB_2-
141 RXB_2+
142 HP_CTRLC
143 5V_DETC
144 DDCC_SDA
EX3AV (HDMI : IC16)
EX3AV
Terminal Functions
PIN NAME
1-2, 12,
26, 34- NC(SW)
38
3-4,
NC
22-25
5-11 VOUT
13-18 PGND
19-21 PVIN
27 ENABLE
28 POK
29 EAOUT
30 SS
31 XFB
32 AGND
33 AVIN
Type
HDMI Input
Power
HDMI Input
HDMI Input
Digital Output
Digital Input
Digital I/O
NO CONNECT – These pins are internally connected to the common switching node of the
internal MOSFETs. They are not to be electrically connected to any external signal, ground,
or voltage. Failure to follow this guideline may result in damage to the device.
NO CONNECT – These pins may be internally connected. Do not connect them to each
other or to any other electrical signal. Failure to follow this guideline may result in device
damage.
Regulated converter output. Connect these pins to the load, and place output capacitor
from these pins and PGND pins 13-15
Input/Output power ground. Connect these pins to the ground electrode of the Input and
output filter capacitors. See VOUT and PVIN pin descriptions for more details.
Input power supply. Connect to input power supply. Decouple with input capacitor to
PGND pins 16-18.
Input Enable. Applying logic high enables the output and initiates a soft-start. Applying a
logic low disables the output.
Power OK is an open drain transistor for power system state indication. POK will be logic
high when VOUT is with -10% to +20% of VOUT nominal.
Optional Error Amplifier output. Allows for customization of the control loop response.
Soft-Start node. The soft-start capacitor is connected between this pin and AGND. The
value of this capacitor determines the startup time.
External Feedback Input. The feedback loop is closed through this pin. A voltage divider at
VOUT is used to set the output voltage. The mid point of the divider is connected to XFB. A
phase lead capacitor from this pin to VOUT is also required to stabilize the loop.
Analog Ground. This is the Ground return for the controller. Needs to be connected to a
quiet ground.
Input power supply for the controller. Needs to be connected to input voltage at a quiet
point.
Digital input channel 1 true of port B in the
HDMI interface.
Receiver terminator supply voltage (3.3 V)
Digital input channel 2 complement of port
B in the HDMI interface.
Digital input channel 2 true of port B in the
HDMI interface.
Hot Plug Detect for port C.
5 V detect pin for port C in the HDMI
interface.
HDCP slave serial clock port C.
DDCC_SDA is a 3.3 V input/output that is
5 V tolerant.
FUNCTION
86
Description