Tri path Technol og y, I nc. - Techni cal I nformation
TCA2002 PIN DESCRIPTION
Pin
1
2
6
3
4
7
5
8
9, 12
10, 11
13
14,16
15
17
18
19
20
21
22
27
23, 28
24
25, 26
Function
BIASCAP
FBKP2
FBKP1
DCMP
FBKN2
FBKN1
VPWR
HMUTE
Y1, Y2
Y1B, Y2B
NC
OCD2, OCD1
REF
VNNSENSE
OVRLDB
VPPSENSE
AGND
V5
OAOUT1
OAOUT2
INV1, INV2
MUTE
BBM1, BBM0
Description
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.
Positive switching feedback (Channels 2 & 1)
Internal mode selection. Grounding this pin enables 16-pulses during startup.
Connecting this pin to V5 disables 16-pulses during startup, which minimizes
turn-on pop. DCMP must be grounded when connected to fet drivers or power
stages using bootstrapped high-side supplies.
Negative switching feedback (Channels 2 & 1)
Test pin. Must be left floating.
Logic output. A logic high indicates both amplifiers are muted, due to the mute
pin state, or a “fault”.
Non-inverted switching modulator outputs. (Channels 1 & 2)
Inverted switching modulator outputs. (Channels 1 & 2)
No connect
Over Current Detect inputs. If either pin exceeds V
TOC
, both amplifiers are
muted. Ground if not used. The TCA2002 will try to automatically recover from
an over current fault with an approximately 950mS repetition rate.
Internal reference voltage; approximately 1.0 VDC. Connect and 8.25kΩ, 1% to
AGND.
Negative supply voltage sense input. This pin is used for both over and under
voltage sensing for the VNN supply.
A logic low output indicates the input signal has overloaded the amplifier.
Positive supply voltage sense input. This pin is used for both over and under
voltage sensing for the VPP supply.
Ground
5 Volt power supply input.
Input stage output pins. (Channels 1 and 2)
Single-ended inputs. Inputs are a “virtual” ground of an inverting opamp with
approximately 2.5VDC bias. The bias at INV1 and INV2 is active, even if the
MUTE pin is high.
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. Ground if not used.
Break-before-make timing control to prevent shoot-through in the output
MOSFETs. Please refer to the Application Information section additional
information.
4
TCA2002 – KLi/0.95/04.06
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
