Datasheet

LM4936
SNAS269A –APRIL 2005–REVISED APRIL 2013 www.ti.com
Electrical Characteristics for Bridged Mode Operation
(1)(2)
The following specifications apply for V
DD
= 5V, unless otherwise noted. Limits apply for T
A
= 25°C.
LM4936
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
V
OS
Output Offset Voltage V
IN
= 0V, No Load 10 50 mV (max)
P
O
Output Power THD + N = 1%; f = 1kHz; R
L
= 3Ω
(5)
2.2 W
THD + N = 1%; f = 1kHz; R
L
= 4Ω
(6)
2 W
THD+N = 1% (max); f = 1kHz; 1.25 1.0 W (min)
R
L
= 8Ω
THD+N = 10%; f = 1kHz; R
L
= 8Ω 1.6 W
THD+N Total Harmonic Distortion+Noise P
O
= 0.4W, f = 1kHz 0.06 %
R
L
= 8Ω, A
VD
= 2, 80kHz BW
PSRR Power Supply Rejection Ratio C
B
= 1µF, f = 120Hz, 55 dB
Input Terminated
V
RIPPLE
= 200mVp-p; R
L
= 8Ω
N
OUT
Output Noise A-Wtd Filter 36 µV
X
talk
Channel Separation
(7)
f = 1kHz, C
B
= 1μF 63 dB
(1) All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical
application as shown in Figure 2.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to Texas Instruments' AOQL ( Average Outgoing Quality Level). Datasheet min/max specification limits are specified
by design, test, or statistical analysis.
(5) When driving 3Ω loads from a 5V supply the LM4936MH must be mounted to the circuit board and forced-air cooled. The demo board
shown in the datasheet has planes for heat sinking. The top layer plane is 1.05 in
2
(675mm
2
), the inner two layers each have a 1.03 in
2
(667mm
2
) plane and the bottom layer has a 3.32 in
2
(2143mm
2
) plane. The planes are electrically GND and interconnected through six
15 mil vias directly under the package and eight 28 mil vias in various locations.
(6) When driving 4Ω loads from a 5V supply the LM4936MH must be mounted to the circuit board. The demo board shown in the datasheet
has planes for heat sinking. The top layer plane is 1.05 in
2
(675mm
2
), the inner two layers each have a 1.03 in
2
(667mm
2
) plane and the
bottom layer has a 3.32 in
2
(2143mm
2
) plane. The planes are electrically GND and interconnected through six 15 mil vias directly under
the package and eight 28 mil vias in various locations.
(7) PCB design will affect Crosstalk performance.
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