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參數(shù)資料
| 型號： | LM1578 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關穩(wěn)壓器 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 1037K |
| 代理商： | LM1578 |
Typical Performance Characteristics
(Continued)
Test Circuit
*
Parameter tests can be made using the test circuit shown.
Select the desired V
, collector voltage and duty cycle with
adjustable power supplies. A digital volt meter with an input
resistance greater than 100 M
should be used to measure
the following:
Input Reference Voltage to Ground; S1 in either position.
Level Shift Accuracy (%) = (T
P3
(V)/1V) x 100%; S1 at I
1
= I
2
= 1 mA
Input Current (mA) = (1V T
p3
(V))/1 M
: S1 at I
1
= I
2
=
0 mA.
Oscillator parameters can be measured at T
p4
using a fre-
quency counter or an oscilloscope.
The Current Limit Sense Voltage is measured by connecting
an adjustable 0-to-1V floating power supply in series with the
current limit terminal and referring it to either the ground or
the V
in
terminal. Set the duty cycle to 90% and monitor test
point T
while adjusting the floating power supply voltage
until the LM1578A’s duty cycle just reaches 0%. This voltage
is the Current Limit Sense Voltage.
The Supply Current should be measured with the duty cycle
at 0% and S1 in the I
1
= I
2
= 0 mA position.
*
LM1578A specifications are measured using automated
test equipment. This circuit is provided for the customer’s
convenience when checking parameters. Due to possible
variations in testing conditions, the measured values from
these testing procedures may not match those of the factory.
Current Limit Sense Voltage
Drift with Temperature
DS008711-38
Current Limit Response Time
for Various Over Drives
DS008711-39
Current Limit Sense Voltage
vs Supply Voltage
DS008711-40
Supply Current
DS008711-41
Supply Current
DS008711-42
Collector Current with
Emitter Output Below Ground
DS008711-43
5
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM1578A | CAP 100UF 50V ELECT TG SMD |
| LM158AFK | DUAL OPERATIONAL AMPLIFIERS |
| LM158APT | OP-AMP|DUAL|BIPOLAR|TSSOP|8PIN|PLASTIC |
| LM158AN | Voltage-Feedback Operational Amplifier |
| LM158AJ-QMLV | Voltage-Feedback Operational Amplifier |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1578A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Switching Regulator |
| LM1578AH/883 | 制造商:Rochester Electronics LLC 功能描述: |
| LM1578H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| LM158 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power dual operational amplifiers |
| LM158 MD8 | 制造商:Texas Instruments 功能描述:LINEAR IC-NON VMI |
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