Datasheet

V
IN
A
SHUTDOWN
V
OUT
A
GND
V
DD
V
OUT
B
BYPASS
V
IN
B
2
3
4
5
6
7
8
9
1
GND (TAB)
V
IN
A
SHUTDOWN
V
OUT
A
GND
GND (TAB)
V
DD
V
OUT
B
BYPASS
V
IN
B
LM4950
www.ti.com SNAS174E –JULY 2003–REVISED MAY 2013
Connection Diagrams
Figure 2. Plastic Package, DDPAK Figure 3. Plastic Package, TO-220
Top View Top View
See Package Number KTW0009A See Package Number NEC0009A
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)(2)(3)
Supply Voltage (pin 6, referenced to GND, pins 4 and 5) 18.0V
Storage Temperature −65°C to +150°C
pins 3 and 7 −0.3V to V
DD
+ 0.3V
Input Voltage
pins 1, 2, 8, and 9 −0.3V to 9.5V
Power Dissipation
(4)
Internally limited
Human Body Model
(5)
2000V
ESD Susceptibility
Machine Model
(6)
200V
Junction Temperature 150°C
θ
JC
(KTW) 4°C/W
θ
JA
(KTW)
(4)
20°C/W
Thermal Resistance
θ
JC
(NEC) 4°C/W
θ
JA
(NEC)
(4)
20°C/W
(1) All voltages are measured with respect to the GND pin, unless otherwise specified.
(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 VDD = 12V 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) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(4) The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
, θ
JA
, and the ambient temperature,
T
A
. The maximum allowable power dissipation is P
DMAX
= (T
JMAX
− T
A
) / θ
JA
or the given in Absolute Maximum Ratings, whichever is
lower. For the LM4950 typical application (shown in Figure 1) with V
DD
= 12V, R
L
= 4Ω stereo operation the total power dissipation is
3.65W. θ
JA
= 20°C/W for both DDPAK and TO220 packages mounted to 16in
2
heatsink surface area.
(5) Human body model, 100pF discharged through a 1.5 kΩ resistor.
(6) Machine Model, 220pF–240pF discharged through all pins.
Operating Ratings
Temperature Range (T
MIN
≤ T
A
≤ T
MAX
) −40°C ≤ T
A
≤ 85°C
Supply Voltage 9.6V ≤ V
DD
≤ 16V
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