Datasheet
PIN ASSIGNMENTS
(A1)
(B1)
(A4)
(C4)
(D4)
(SIDE VIEW)
MicroStar Juniort (GQY) PACKAGE
(TOP VIEW)
NC V
DD
SHUTDOWN
IN+
IN−
V
O−
V
DD
V
O+
NOTES A. The shaded terminals are used for electrical and thermal connections to the ground plane. All the shaded terminals need to be electrical
connected to ground. No connect (NC) terminals still need a pad and trace.
B. The thermal pad of the DRB and DGN packages must be electrically and thermally connected to a ground plane.
(C1)
(D1)
(B4)
GND
8
SHUTDOWN
NC
IN+
IN−
V
O−
GND
V
DD
V
O+
8-PIN QFN (DRB) PACKAGE
(TOP VIEW)
7
6
5
1
2
3
4
NC − No internal connection
V
O−
GND
V
DD
V
O+
8
7
6
5
1
2
3
4
SHUTDOWN
NC
IN+
IN−
8-PIN MSOP (DGN) PACKAGE
(TOP VIEW)
_
+
_
+
_
+
_
+
150 kΩ
150 kΩ
_
+
_
+
Deglitch
Logic
Deglitch
Logic
Gate
Drive
Gate
Drive
V
DD
Short
Circuit
Detect
Startup
& Thermal
Protection
Logic
Ramp
Generator
Biases
and
References
TTL
Input
Buffer
SD
Gain = 2 V/V
B4, C4
V
DD
A4
V
O−
D4
V
O+
†
GND
D1
IN−
C1
IN+
A1
SHUTDOWN
†
A2, A3, B3, C2, C3, D2, D3
(terminal labels for MicroStar Junior package)
TPA2005D1
SLOS369F – JULY 2002 – REVISED JULY 2008 ...............................................................................................................................................................
www.ti.com
Terminal Functions
TERMINAL
I/O DESCRIPTION
NAME ZQY, GQY DRB, DGN
IN- D1 4 I Negative differential input
IN+ C1 3 I Positive differential input
V
DD
B4, C4 6 I Power supply
V
O+
D4 5 O Positive BTL output
A2, A3, B3, C2, C3,
GND 7 I High-current ground
D2, D3
V
O-
A4 8 O Negative BTL output
SHUTDOWN A1 1 I Shutdown terminal (active low logic)
NC B1 2 No internal connection
Thermal Pad Must be soldered to a grounded pad on the PCB.
FUNCTIONAL BLOCK DIAGRAM
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