參數(shù)資料
型號(hào)： HA16121FP
廠商： Hitachi,Ltd.
元件分類(lèi)： 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(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 19/34頁(yè)
文件大?。?/td> 250K
代理商： HA16121FP
HA16116FP/FPJ, HA16121FP/FPJ
19
7.2 Adjusting UVL Voltage (when intermittent operation is not used)
The UVL voltage setting in this IC series can be adjusted externally as shown below.
Using the relationships shown in the figure, the UVL voltage in relation to V
IN
can be adjusted by changing
the relative values of V
TH
and V
TL
.
When the IC is operating, transistor Q
4
is off, so V
ON
= 3V
BE
≈
2.1 V. Accordingly, by connecting resistors
R
C
and R
D
, the voltage at which UVL is cancelled is as follows.
V
IN
= 2.1 V
R
C
+ R
D
R
D
×
This V
IN
is simply the supply voltage at which the UVL stops functioning, so in this state Vref is still below
2.5 V. In order to restore Vref to 2.5 V, a V
IN
of approximately 4.3 V should be applied.
With this IC series, V
ON/
OFF
makes use of the V
BE
of internal transistors, so when designing a power supply
system it should be noted that V
ON
has a temperature dependency of around –6 mV/°C.
R
C
R
D
TIM
(open)
ON/OFF
GND
50 k
P.V
IN
S.V
IN
V
IN
Q
1
Q
2
Q
3
Q
4
Vref output
Vref
generation
circuit
To other circuitry
To latch
Vref
3
2
1
00
1
2
V
ON/OFF
3
4
5
V
1.4 V
OFF
V
2.1 V
ON
2.5 V
V 4.5 V
To output
stage
On/off hysteresis circuit
Figure 7.2 Adjusting UVL Voltage
相關(guān)PDF資料
PDF描述
HA16116FP 1500000 SYSTEM GATE 1.5 VOLT FPGA
HA16116FPJ RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
HA16129FPJ Single Watchdog Timer
HA16129 1500000 SYSTEM GATE 1.5 VOLT FPGA
HA16129AFPJ Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp.
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA16121FP-E 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Dual-OUT PWM DC to DC Controller/Step Up/Step Down 20-Pin SOP 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Dual-OUT PWM DC to DC Controller/Step Up/Step Down 20-Pin SOP Cut Tape 制造商:Renesas Electronics Corporation 功能描述:Power Sup,SW Reg.Control IC,Boost,FP-20
HA16121FPJ 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Switching Regulator for Chopper Type DC/DC Converter
HA16129 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Single Watchdog Timer
HA16129AFPJ 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp.
HA16129FPJ 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:Single Watchdog Timer
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