Denon AVC-A1XV Service Manual page 63

TC9274F-022 (IC120,213,214,401,402) AUDIO P.W.B.
TPS6734IDR (IC301) DIGITAL P.W.B.
EN V
1 8
CC
REF FB
2 7
SS OUT
3 6
COMP GND
4 5
functional block diagram
1
EN
EN
7
FB
4
COMP
_
+
2
REF
Reference
1 MΩ
3
SS
x3.5
TERMINAL
NAME NO.
EN 1 Enable. EN ≥ 2 V turns on the TPS6734. EN ≤ 0.4 V turns it off and reduces the supply current to 3 µA max.
REF 2 1.22-V reference voltage output. REF can source 100 µA for external loads.
SS 3 Soft Start. A capacitor between SS and GND brings the output voltage up slowly at power-up.
COMP 4 Compensation connection. A 0.001-µF capacitor between COMP and FB stabilizes the feedback loop.
GND 5 Ground
OUT 6 N-channel MOSFET drain connection
FB 7 Feedback voltage. FB is connected to the converter output for the feedback loop.
V CC 8 Supply voltage input
EN
170-kHz
Oscillator
S
R
Error
Drive Latch
Amplifier PWM
Comparator
x6
Voltage
Current
Sense Amplifier
SS
Clamp
Overcurrent
Comparator
Terminal Functions
V CC
Power Switch
Q
Driver
Σ
+
–
DESCRIPTION DESCRIPTION
63
AVR-5805/AVC-A1XV
8
V CC
6
OUT
5
GND