Tripath Technology, Inc. - Preliminary Information
Pin Description
Pin
1
2
Function
Description
OAOUT_AUX
Output of auxiliary op-amp
INV_AUX
Negative input of auxiliary op-amp. Internally biased at 2.5VDC.
3
BIASCAP
Bandgap reference times two (typically 2.5VDC). Used to set the common
mode voltage for the input op amps. This pin is not capable of driving external
circuitry.
4
DCMP
Internal mode selection. This pin must be connected to 5V for proper device
operation.
Analog Ground
5
6, 32
7
AGND
V5
BBMSET
5 Volt power supply input
Break-before-make timing control to prevent shoot-through in the output
Mosfets.
8
GATEOFF
10V under-voltage fault pin (requires external pull-up resistor)
9, 10
OCSP_NEG,
OCSN_NEG
FBK_NEG
PGND
Over-current detect pins for negative output.
11
13, 24
15
17
20
22
Switching feedback for negative output.
Power Ground.
HO_NEG
L0_NEG
LO_POS
HO_POS
V10
High side gate drive output for negative amplifier half-bridge
Low side gate drive output for negative amplifier half-bridge
Low side gate drive output\ for positive amplifier half-bridge
High side gate drive output for positive amplifier half-bridge
10 Volt power supply input. Used for gate drive circuitry.
Switching feedback for positive output.
25
27
FBK_POS
28, 29
OCSN_POS,
OCSP_POS
FAULT
Over-current detect pins for positive output.
30
33
34
35
A logic high output indicates an under-voltage (5V or 10V), over-current or
over-temperature condition (requires and external pull-down resistor).
Over-Current Detect pin. This pin must be connected to AGND for proper
device operation.
OCD2
REF
Internal bandgap reference voltage; approximately 1.0 VDC. Requires an
external 8.25k resistor to AGND.
OCD1
Over-Current Detect pin. This pin must be connected to AGND for proper
device operation.
36
38
SUB
VNNSENSE
Substrate pin. Must connect to AGND.
Negative supply voltage sense input. This pin is used for both over and under
voltage sensing for the VNN supply.
40
VPPSENSE
AGND
Positive supply voltage sense input. This pin is used for both over and under
voltage sensing for the VPP supply.
41, 42
Analog Ground. External input circuitry such as preamps or gain controls
should be referenced to these pins.
43, 44
45
46
47
V5
5 Volt power supply input.
OAOUT_AMP
INV_AMP
MUTE
Output of op-amp used to provide signal to the amplifier.
Negative input of amplifier op-amp.
When set to logic high, the amplifier is in idle mode. When low (grounded), the
amplifier outputs are fully operational. Mute can be connected to the FAULT
pin to enable auto restart after a fault occurrence.
Not Connected internally. These pins may be grounded or left floating on the
PCB layout.
12,14,16,
18,19,21,
23, 26
NC
31,37,
39, 48
6
TDA1400 – Rev. 0.65/KLi/02.06
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
