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LM196 数据表(PDF) 1 Page - National Semiconductor (TI) |
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LM196 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page TLH9059 August 1992 LM196LM396 10 Amp Adjustable Voltage Regulator General Description The LM196 is a 10 amp regulator adjustable from 125V to 15V which uses a revolutionary new IC fabrication structure to combine high power discrete transistor technology with modern monolithic linear IC processing This combination yields a high-performance single-chip regulator capable of supplying in excess of 10 amps and operating at power lev- els up to 70 watts The regulators feature on-chip trimming of reference voltage to g08% and simultaneous trimming of reference temperature drift to 30 ppm C typical Thermal interaction between control circuitry and the pass transistor which affects the output voltage has been reduced to ex- tremely low levels by strict attention to isothermal layout This interaction called thermal regulation is 100% tested These new regulators have all the protection features of popular lower power adjustable regulators such as LM117 and LM138 including current limiting and thermal limiting The combination of these features makes the LM196 im- mune to blowout from output overloads or shorts even if the adjustment pin is accidentally disconnected All devices are ‘‘burned-in’’ in thermal shutdown to guarantee proper operation of these protective features under actual overload conditions Output voltage is continuously adjustable from 125V to 15V Higher output voltages are possible if the maximum input-output voltage differential specification is not exceed- ed Full load current of 10A is available at all output volt- ages subject only to the maximum power limit of 70W and of course maximum junction temperature The LM196 is exceptionally easy to use Only two external resistors are used to to set output voltage On-chip adjust- ment of the reference voltage allows a much tighter specifi- cation of output voltage eliminating any need for trimming in most cases The regulator will tolerate an extremely wide range of reactive loads and does not depend on external capacitors for frequency stabilization Heat sink require- ments are much less stringent because overload situations do not have to be accounted foronly worst-case full load conditions The LM196 is in a TO-3 package with oversized (0060 ) leads to provide best possible load regulation Operating junction temperature range is b55 Cto a150 C The LM396 is specified for a 0 Cto a125 C junction tempera- ture range Features Y Output pre-trimmed to g08% Y 10A guaranteed output current Y Pa Product Enhancement tested Y 70W maximum power dissipation Y Adjustable output125V to 15V Y Internal current and power limiting Y Guaranteed thermal resistance Y Output voltage guaranteed under worst-case conditions Y Output is short circuit protected Typical Applications VOUT e (125V) R1aR2 R1 J aIADJ(R2) TLH9059 – 1 For best TC of VOUT R1 should be wirewound or metal film 1% or better R2 should be same type as R1 with TC track- ing of 30 ppm C or better C1 is necessary only if main filter capacitor is more than 6 away assuming 18 or larger leads C2 is not absolutely necessary but is suggest- ed to lower high frequency output impedance Output capacitors in the range of 1 mFto 1000 mF of aluminum or tantalum electrolytic are commonly used to provide improved out- put impedance and rejection of transients C3 improves ripple rejection output imped- ance and noise C2 should be 1 mF or larger close to the regulator if C3 is used FIGURE 1 Basic 125V to 15V Regulator C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
类似零件编号 - LM196 |
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类似说明 - LM196 |
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