Pin Description - Onkyo TX-L55 Service Manual

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC2150(Digital Power Amplifier Driver)
Pin Connection
NC
OCS1LN
OCS1LP
NC
NC
VBOOT1
NC
SW-FB
SMPSO
NC
NC
NC
NC

Pin Description

Pin Function
5 AGND
6
7 OCD1
9 TSS
10 OCD2
13,17 Y2, Y1
14,16 Y2B, Y1B
27,57 VBOOT2, VBOOT1
30,31 OCS2LP, OCS2LN
33,34 OCS2HP, OCS2HN
36,48 HO2, HO1
37,47 HO2COM, HO1COM
39,45 LO2COM, LO1COM
40,44 LO2, LO1
41,43 VN10
42 VNN
50,51 OCS1HN, OCS1HP
53,54 OCS1LN ,OCS1LP
59 SW-FB
60 SMPSO
1,2,3,4,8,
11,12,15,
18,19,20,
21,22,23,
24,25,26,
28,29,32,
35,38,46,
49,52,55,
56,58,61,
62,63,64
64-pin LQFP
(Top View)
51 50 49 48 47
46 45 44 43 42 41
52
53
54
55
56
57
58
59
60
61
62
63
64
1 2 3 4 5 6 7 8 9
10
Analog ground.
V5 5V power supply input.
Over-current threshold output (Channel 1)
This a test pin for the TP2350B. This pin should be left floating.
Over-current threshold output (Channel 2)
Non-inverted switching modulator inputs
Inverted switching modulator inputs
Bootstrapped voltage to supply drive to gate of high-side FET
(Channel 2 & 1)
Over Current Sense inputs, Channel 2 low-side
Over Current Sense inputs, Channel 2 high-side
High side gate drive output (Channel 2 & 1)
Kelvin connection to source of high-side transistor (Channel 2 & 1)
Kelvin connection to source of low-side transistor (Channel 2 & 1)
Low side gate drive output (Channel 2 & 1)
"Floating" supply input for the FET drive circuitry. This voltage must be stable
and referenced to VNN.
Negative supply voltage.
Over Current Sense inputs, Channel 1 high-side
Over Current Sense inputs, Channel 1 low-side
Feedback for regulating switching power supply output for VN10
Switching power supply output for VN10
NC Not connected (bonded) internally. Leave these pins floating.
40 39 38 37 36 35 34 33
32
NC
31
OCS2LN
30
OCS2LP
29
NC
28
NC
27
VBOOT2
26
25
NC
24 NC
23 NC
22
NC
21
NC
20
15 16 17 18 19
11 12 13 14
Description
TX-L55/LR552
NC
NC