VIN

A

SHUTDOWN

VOUT

A

GND

VDD

VOUT

B

BYPASS

V IN

B

2

3

4

5

6

7

8

9

1

GND (TAB)

VIN

A

SHUTDOWN

VOUT

A

GND

GND (TAB)

VDD

VOUT

B

BYPASS

VIN

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 VDD + 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

θJC (KTW)

4°C/W

θJA (KTW)

(4)

20°C/W

Thermal Resistance

θJC (NEC)

4°C/W

θJA (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 TJMAX, θJA, and the ambient temperature,

TA. The maximum allowable power dissipation is P DMAX = (TJMAX − TA) / θJA or the given in Absolute Maximum Ratings, whichever is

lower. For the LM4950 typical application (shown in Figure 1) with VDD = 12V, RL = 4Ω stereo operation the total power dissipation is

3.65W.

θJA = 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 k

Ω resistor.

(6)

Machine Model, 220pF–240pF discharged through all pins.

Operating Ratings

Temperature Range (TMIN ≤ TA ≤ TMAX)

−40°C ≤ T A ≤ 85°C

Supply Voltage

9.6V

≤ VDD ≤ 16V

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