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參數(shù)資料
| 型號： | HCA10014 |
| 廠商： | Intersil Corporation |
| 英文描述： | Darlington Bipolar Transistor; Package/Case:TO-3; Current Rating:50A; Voltage Rating:120V |
| 中文描述： | 15MHz的，BiMOS運算放大器MOSFET的輸入/ CMOS輸出 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大小： | 521K |
| 代理商： | HCA10014 |
14
Error Amplifier in Regulated Power Supplies
The HCA10014 is an ideal choice for error amplifier service
in regulated power supplies since it can function as an error
amplifier when the regulated output voltage is required to
approach zero. Figure 19 shows the schematic diagram of a
40mA power supply capable of providing regulated output
voltage by continuous adjustment over the range from 0V to
13V. Q
3
and Q
4
in lC
2
(a CA3086 transistor array lC)
function as zeners to provide the supply voltage for
comparator IC
1
. Q
1
, Q
2
, and Q
5
in IC
2
are configured as a
low impedance, temperature compensated source of
adjustable reference voltage for the error amplifier.
Transistors Q
1
, Q
2
, Q
3
, and Q
4
in lC
3
(another CA3086
transistor array lC) are connected in parallel as the series
pass element. Transistor Q
5
in lC
3
functions as a current
limiting device by diverting base drive from the series pass
transistors, in accordance with the adjustment of resistor R
2
.
Figure 20 contains the schematic diagram of a regulated
power supply capable of providing regulated output voltage
by continuous adjustment over the range from 0.1V to 50V
and currents up to 1A. The error amplifier (lC
1
) and circuitry
associated with lC
2
function as previously described,
although the output of lC
1
is boosted by a discrete transistor
(Q
4
) to provide adequate base drive for the Darlington
connected series pass transistors Q
1
, Q
2
. Transistor Q
3
functions in the previously described current limiting circuit.
Multivibrators
The exceptionally high input resistance presented by the
HCA10014 is an attractive feature for multivibrator circuit
design because it permits the use of timing circuits with high
R/C ratios. The circuit diagram of a pulse generator (astable
multivibrator), with provisions for independent control of the
“on” and “off” periods, is shown in Figure 21. Resistors R
1
and R
2
are used to bias the HCA10014 to the midpoint of
the supply voltage and R
3
is the feedback resistor. The pulse
repetition rate is selected by positioning S
1
to the desired
position and the rate remains essentially constant when the
resistors which determine “on-period” and “off-period” are
adjusted.
Function Generator
Figure 22 contains a schematic diagram of a function
generator using the HCA10014 in the integrator and
threshold detector functions. This circuit generates a
triangular or square wave output that can be swept over a
1,000,000:1 range (0.1Hz to 100kHz) by means of a single
control, R
1
. A voltage control input is also available for
remote sweep control.
FIGURE 20. VOLTAGE REGULATOR CIRCUIT (0.1V TO 50V AT 1A)
6
2
3
1
8
7
4
4.3k
1W
1
+
-
43k
100
μ
F
ERROR
AMPLIFIER
IC
1
VOLTAGE
ADJUST
14
13
100
μ
F
+55V
INPUT
2.2k
+
-
IC
2
CA3086
10, 11
Q
4
Q
1
Q
2
6
REGULATION (NO LOAD TO FULL LOAD): <0.005%
INPUT REGULATION: 0.01%/V
HUM AND NOISE OUTPUT: <250
μ
V
RMS
UP TO 100kHz
+
-
+
-
+
-
+
-
3.3k
1W
5
μ
F
9
8, 7
Q
3
1, 2
3
5
4
1k
62k
Q
5
12
10k
Q
2
Q
1
50k
Q
3
1k
2N3055
2N2102
CURRENT
LIMIT
ADJUST
2N5294
2N2102
Q
4
1000pF
10k
8.2k
OUTPUT:
0.1 TO 50V
AT 1A
HCA10014
HCA10014
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