Denon AVR-S540BT Service Manual

Terminal Functions
TC74VHC157FT (DIGITAL : IC745)
TPS563200 (DIGITAL : IC751 - IC753)
Terminal Functions
PIN
DESCRIPTION
NAME NUMBER
GND 1
Ground pin Source terminal of low-side power NFET as well as the ground ter-
minal for controller circuit. Connect sensitive VFB to this GND at a single point.
SW 2 Switch node connection between high-side NFET and low-side NFET.
VIN 3 Input voltage supply pin. The drain terminal of high-side power NFET.
VFB 4
Converter feedback input. Connect to output voltage with feedback resistor
divider.
EN 5 Enable input control. Active high and must be pulled up to enable the device.
VBST 6
Supply input for the high-side NFET gate drive circuit. Connect a 0.1 μ F ca-
pacitor between VBST and SW pins.
Block diagram
TC74VHC157F/FN/FT/FK
2007-10-01
2
Pin Assignment IEC Logic Symbol
Truth Table
Inputs
ST SELECT A B
Output
H X X X L
L L L X L
L L H X H
L H X L L
L H X H H
X: Don’t care
(1)
(15)
(2)
(5)
(3)
1A
2A
1B
(6)
(10)
3A
2B
(4)
(9)
1Y
3Y
(7)
(12)
2Y
4Y
EN
SELECT
ST
3B
(14)
(13)
4A
4B
G1
(11)
1 MUX
1
4A
V
CC
16
4B
15
14
13
12
11
10
1
2
3
4
5
6
7
1Y
2A
2B
2Y
GND
4Y
8
3Y
9
3A
3B
(top view)
1A
1B
SELECT
ST
A
S G
B A
Y B
A
Y
B A
Y BY
SW
VBST
VFB
GND
2
3
1
EN
4
6
5
VIN
TPS562200, TPS563200
DDC (SOT) Package
Top View
2 SW
ZC
XCON
PWM
Control Logic
+
+
+
UVP
OVP
3 VIN
Ton
One-Shot
6
VBST
+
4
VFB
OCL
+
+
Soft Start
5EN
HS
LS
1 GND
SS
Voltage
Reference
Ref
Hiccup
V
UVP
V
OVP
OCL
threshold
Regulator
UVLO
VREG5
VREG5
TSD
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
42

Denon AVR-S540BT Specifications

General

Channels	5.2
Power Output per Channel	70 W (8 ohm, 20 Hz - 20 kHz, 0.08% 2ch Drive)
Output Power (6 ohm, 1 kHz, 0.7% 2ch Drive)	90 W
Output Power (6 ohm, 1 kHz, 10% 1ch Drive)	140 W
HDMI Inputs	5
HDMI Outputs	1
HDMI Version	2.0a
HDCP Support	2.2
4K/60 Hz Pass-through	Yes
Dolby Format	Dolby TrueHD, Dolby Digital Plus
DTS Format	DTS-HD Master Audio
Auto Speaker Setup	Yes (Audyssey MultEQ)
Bluetooth	Yes
FM Tuner	Yes
AM Tuner	Yes
Input Sensitivity/Impedance	200 mV / 47 kOhm
Dimensions (W x H x D)	434 x 151 x 319 mm
Ethernet Port	No
Wi-Fi	No
HDR Support	HDR10, HLG
Frequency Response	10 Hz - 100 kHz - +1/-3 dB
Total Harmonic Distortion	0.08% (20 Hz - 20 kHz)
Signal-to-Noise Ratio	98 dB (IHF-A weighted)
USB Port	Yes (Front)