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參數(shù)資料
| 型號(hào)： | HA16120FP |
| 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 |
| 文件頁數(shù)： | 13/38頁 |
| 文件大?。?/td> | 275K |
| 代理商： | HA16120FP |
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HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
13
5. Voltage Reference (Vref = 2.5 V)
5.1 Voltage Reference
A bandgap reference built into the IC (see figure 5.1) outputs 2.5 V ± 50 mV. The sawtooth oscillator,
PWM comparator, latch, and other internal circuits are powered by this 2.5 V and an internally-generated
voltage of approximately 3.2 V.
The voltage reference section shut downs when the IC is turned off at the ON/
OFF
pin as described later,
saving current when the IC is not used and when it operates in intermittent mode during overcurrent.
ON/OFF
+
1.25 V
1.25 V
25 k
25 k
V
IN
Vref
2.5 V
3.2 V
ADJ
Sub bandgap circuit
Main bandgap circuit
Figure 5.1 Vref Reference Circuit
5.2 Trimming the Reference Voltage (Vref and ADJ pins)
Figure 5.2 shows a simplified circuit equivalent to figure 5.1. The ADJ pin in this circuit is provided for
trimming the reference voltage (Vref). The output at the ADJ pin is a voltage V
ADJ
of 1.25 V (Typ)
generated by the bandgap circuit. Vref is determined by V
ADJ
and the ratio of internal resistors R
1
and R
2
as
follows:
Vref = V
ADJ
×
R
1
+ R
2
R
2
The design values of R
1
and R
2
are 25 k
with a tolerance of ±25%.
If trimming is not performed, the ADJ pin open can be left open.
+
V
IN
Vref
ADJ
R
R
25 k
(typ)
25 k
(typ)
1
2
V
BG
(bandgap voltage)
1.25 V (typ)
Figure 5.2 Simplified Diagram of Voltage Reference Circuit
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| HA16114PJ | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16120FPJ | CAP 1000PF 25V 5% NP0(C0G) SMD-0603 TR-7 PLATED-NI/SN |
| HA16117FA | CMOS Watchdog Timer |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA16120FP-E | 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.9V to 40V Input 16-Pin SOP 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.9V to 40V Input 16-Pin SOP Bulk 制造商:Renesas Electronics Corporation 功能描述:Power Sup,SW Reg.Control IC,Boost,DIP16 |
| HA16120FPJ | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Switching Regulator for Chopper Type DC/DC Converter |
| HA16121 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Switching Regulator for Chopper Type DC/DC Converter |
| HA16121FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Switching Regulator for Chopper Type DC/DC Converter |
| 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 |
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