Sharp LC-26GA5F Service Manual page 105

2. IC1301 (VHITA2024++-1)
2.1. Pinning IC1301
2.2. Pin Description IC1301
Pin
2, 3 DCAP2, DCAP1
4, 9
5, 8, AGND1, AGND2,
17
6
7 OVERLOADB
10, 14 OAOUT1, OAOUT2
11, 15
12
16
18
19
20, 35 PGND2, PGND1
22
24, 27; OUTP2 & OUTM2;
31, 28 OUTP1 & OUTM1
25, 26, VDD2, VDD2
29, 30 VDD1, VDD1
13, 21,
23, 32,
34
33
36
1
1
+5VGEN
2
DCAP2
3
DCAP1
4
V5D
5
AGND1
6
REF
7
OVERLOADB
8
AGND2
9
V5A
10
OAOUT1
11
INV1
12
MUTE
13
NC
14
OAOUT2
15
INV2
16
BIASCAP
17
AGND3
18
SLEEP
Function
Charge pump switching pins. DCAP1 (pin 3) is a free running 300kHz square
wave between VDDA and DGND (12Vpp nominal). DCAP2 (pin 2) is level shifted
10 volts above DCAP1 (pin 3) with the same amplitude (12Vpp nominal),
frequency, and phase as DCAP1.
V5D, V5A Digital 5VDC, Analog 5VDC
Analog Ground
AGND3
REF Internal reference voltage; approximately 1.0 VDC.
A logic low output indicates the input signal has overloaded the amplifier.
Input stage output pins.
INV1, INV2 Single-ended inputs. Inputs are a "virtual" ground of an inverting opamp with
approximately 2.4VDC bias.
MUTE When set to logic high, both amplifiers are muted and in idle mode. When low
(grounded), both amplifiers are fully operational. If left floating, the device stays in
the mute mode. This pin should be tied to GND if not used.
BIASCAP Input stage bias voltage (approximately 2.4VDC).
SLEEP When set to logic high, device goes into low power mode. If not used, this pin
should be grounded
FAULT A logic high output indicates thermal overload, or an output is shorted to ground,
or another output.
Power Grounds (high current)
DGND Digital Ground. Connect to AGND locally (near the TA2024).
Bridged output pairs
Supply pins for high current H-bridges, nominally 12VDC.
NC Not connected. Not bonded internally.
VDDA Analog 12VDC
CPUMP Charge pump output (nominally 10V above VDDA)
5VGEN Regulated 5VDC source used to supply power to the input section (pins 4 and 9).
36
CPUMP
35
PGND1
34
NC
33
VDDA
32
NC
31
OUTP1
30
VDD1
29
VDD1
28
OUTM1
27 OUTM2
26 VDD2
25 VDD2
24 OUTP2
23 NC
22 DGND
NC
21
PGND2
20
FAULT
19
Description
105
LC-26GA5E
LC-26GA5E
LC-32GA5E
LC-32GA5E