Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SO 16

L272

July 2003

DUAL POWER OPERATIONAL AMPLIFIERS

OUTPUT CURRENT TO 1 A

OPERATES AT LOW VOLTAGES

SINGLE OR SPLIT SUPPLY

LARGE COMMON-MODE AND DIFFEREN-

TIAL MODE RANGE

GROUND COMPATIBLE INPUTS

LOW SATURATION VOLTAGE

THERMAL SHUTDOWN

DESCRIPTION

The L272 is a monolithic integrated circuits in Pow-

erdip, Minidip and SO packages intended for use as

power operational amplifiers in a wide range of ap-

plications including servo amplifiers and power sup-

plies, compacts disc, VCR, etc.

The high gain and high output power capability pro-

vide superior performance whatever an operational

amplifier/power booster combination is required.

Powerdip

(8 + 8)

Minidip

ORDERING NUMBERS

: L272 (Powerdip)

L272M (Minidip)

L272D (SO16 Narrow)

PIN CONNECTIONS (top view)

SO16 (Narrow)

L272D

L272M

1/10

Summary of content (10 pages)

PAGE 1
L272 ® DUAL POWER OPERATIONAL AMPLIFIERS .. .. .. . OUTPUT CURRENT TO 1 A OPERATES AT LOW VOLTAGES SINGLE OR SPLIT SUPPLY LARGE COMMON-MODE AND DIFFERENTIAL MODE RANGE GROUND COMPATIBLE INPUTS LOW SATURATION VOLTAGE THERMAL SHUTDOWN Powerdip (8 + 8) DESCRIPTION The L272 is a monolithic integrated circuits in Powerdip, Minidip and SO packages intended for use as power operational amplifiers in a wide range of applications including servo amplifiers and power supplies, compacts disc, VCR, etc.
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L272 BLOCK DIAGRAMS L272 SCHEMATIC DIAGRAM (one only) 2/10 L272D L272M
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L272 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Vs Supply Voltage 28 Vi Input Voltage Vs Vi Differential Input Voltage Io DC Output Current 1 A Ip Peak Output Current (non repetitive) 1.5 A Power Dissipation at: Tamb = 80°C (L272), Tamb = 50°C (L272M), Tcase = 90 °C (L272D) Tcase = 75 °C (L272) 1.
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L272 Figure 1 : Quiescent Current versus Supply Voltage Figure 2 : Quiescent Drain Current versus Temperature Figure 3 : Open Loop Voltage Gain Figure 4 : Output Voltage Swing versus Load Current Figure 5 : Output Voltage Swing versus Load Current Figure 6 : Supply Voltage Rejection versus Frequency 4/10
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L272 Figure 7 : Channel Separation versus Frequency APPLICATION SUGGESTION NOTE In order to avoid possible instability occuring into final stage the usual suggestions for the linear power stages are useful, as for instance : Figure 8 : Common Mode Rejection versus Frequency - layout accuracy ; - a 100nF capacitor corrected between supply pins and ground ; - boucherot cell (0.1 to 0.
PAGE 6
L272 Figure 12 : Motor Current Control Circuit. Note : The input voltage level is compatible with L291 (5-BIT D/A converter). Figure 13 : Bidirectional Speed Control of DC Motors. 2R3 ° R1 For circuit stability ensure that RX > where RM = internal resistance of motor. RM Vs 2R ° R1 The voltage available at the terminals of the motor is VM = 2 (Vi ⋅ ) + Ro ⋅ ΙM where Ro = 2 RX and IM is the motor current.
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L272 mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.055 0.020 0.50 D 0.015 0.020 20.0 0.787 E 8.80 0.346 e 2.54 0.100 e3 17.78 0.700 F 7.10 0.280 I 5.10 0.201 L OUTLINE AND MECHANICAL DATA 3.30 0.130 Powerdip 16 Z 1.27 0.
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L272 mm inch DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 0.020 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 8/10 3.18 OUTLINE AND MECHANICAL DATA 3.81 1.52 0.125 0.150 0.
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L272 mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.25 a2 MAX. 0.069 0.004 0.009 1.6 0.063 b 0.35 0.46 0.014 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 c1 45˚ (typ.) 9.8 10 0.386 0.394 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F (1) 3.8 4 0.150 0.157 G 4.6 5.3 0.181 0.209 L 0.4 1.27 0.016 0.050 S Weight: 0.20gr 0.020 D (1) M OUTLINE AND MECHANICAL DATA 0.62 0.024 SO16 Narrow 8˚(max.
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L272 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice.