參數(shù)資料
型號(hào)： HA16114PJ
廠商： Hitachi,Ltd.
元件分類： 基準(zhǔn)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(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 14/38頁(yè)
文件大小： 275K
代理商： HA16114PJ
HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
14
The relation between Vref and the ADJ pin enables Vref to be trimmed by inserting one external resistor
(R
3
) between the Vref and ADJ pins and another (R
4
) between the ADJ pin and ground, to change the
resistance ratio. Vref is then determined by the combined resistance ratio of the internal R
1
and R
2
and
external R
3
and R
4
.
Vref = V
ADJ
×
R
A
+ R
B
R
B
Where, R
A
: parallel resistance of R
1
and R
3
R
B
: parallel resistance of R
2
and R
4
Although Vref can be trimmed by R
3
or R
4
alone, to decrease the temperature dependence of Vref it is
better to use two resistors having identical temperature coefficients. Vref can be trimmed in the range of
2.5 V ± 0.2 V. Outside this range, the bandgap circuit will not operate and the IC may shut down.
Vref
ADJ
R
1
R
2
Internal
resistors
R
3
R
4
External
resistors
R
A
=
R
1
R
3
R
1
+ R
3
R
B
=
R
2
R
4
R
2
+ R
4
Figure 5.3 Trimming of Reference Voltage
5.3 Vref Undervoltage Lockout and Overvoltage Protection
The undervoltage lockout (UVL) function turns off PWM pulse output when the input voltage (V
IN
) is low.
In these ICs, this is done by monitoring the Vref voltage, which normally stays constant at approximately
2.5 V. The UVL circuit operates with hysteresis: it shuts PWM output off when Vref falls below 1.7 V,
and turns PWM output back on when Vref rises above 2.0 V. Undervoltage lockout also provides
protection in the event that Vref is shorted to ground.
The overvoltage protection circuit shuts PWM output off when Vref goes above 6.8 V. This provides
protection in case the Vref pin is shorted to V
IN
!
PWM
output
off
PWM output on
PWM output off
1.7 2.0
2.5
5.0
6.8
Vref
PWM
output
(V)
10
Figure 5.4 Vref Undervoltage Lockout and Overvoltage Protection
UVL Voltage
Vref (V typ)
V
IN
(V typ)
3.6 V
Description
V
H
V
L
2.0 V
V
IN
increasing: UVL releases; PWM output starts
V
IN
decreasing: undervoltage lockout; PWM output stops
1.7 V
3.3 V
相關(guān)PDF資料
PDF描述
HA16120FPJ CAP 1000PF 25V 5% NP0(C0G) SMD-0603 TR-7 PLATED-NI/SN
HA16117FA CMOS Watchdog Timer
HA16117FB CMOS Watchdog Timer
HA16117FC CMOS Watchdog Timer
HA16117FPA CMOS Watchdog Timer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FW330F1 制造商:GE Energy (formerly Lineage Power) 功能描述:Module DC-DC 1-OUT 3.3V 100A 330W 22-Pin
FW330F1-59T 制造商:GE Energy (formerly Lineage Power) 功能描述:108755794
FW330G71-56T 制造商:GE Energy (formerly Lineage Power) 功能描述:Module DC-DC 1-OUT 2.5V 100A 330W 22-Pin
FW332 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
FW340 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:N-Channel and P-Channel Silicon MOSFETs General-Purpose Switching Device
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*