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LM196 数据表(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM196
功能描述  LM196/LM396 10 Amp Adjustable Voltage Regulator
Download  14 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM196 数据表(HTML) 1 Page - National Semiconductor (TI)

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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


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