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參數(shù)資料
| 型號： | HA16116FPJ |
| 廠商： | Hitachi,Ltd. |
| 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)： | 10/34頁 |
| 文件大小： | 250K |
| 代理商： | HA16116FPJ |
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HA16116FP/FPJ, HA16121FP/FPJ
10
2.3 Error Amplifier
Figure 2.3 shows an equivalent circuit of the error amplifier. The error amplifier on these ICs is configured
of a simple NPN transistor differential input amplifier and the output circuit of a constant-current driver.
This amplifier features wide bandwidth (f
T
= 4 MHz) with open loop gain kept to 50 dB, allowing stable
feedback to be applied when the power supply is designed. Phase compensation is also easy.
Both HA16116 and HA16121 have a noninverting input (IN(+)) pin, in order to allow use of the channel 1
error amplifier for inverting control. The channel 2 error amplifier, on the other hand, is used for step-
down control in HA16116 and booster control in HA16121; so the channel 2 noninverting input is
connected internally to Vref.
IN(
)
IN(+)
E/O
40 A
80 A
IC internal V
IN
To internal PWM
comparator
Figure 2.3 Error Amplifier Equivalent Circuit
3. Dead Band (DB) Duty and Soft Start Setting (common to both channels)
3.1 Dead Band Duty Setting
Dead band duty is set by adjusting the DB pin input voltage (V
DB
). A convenient means of doing this is to
connect two external resistors to the Vref of this IC so as to divide V
DB
(see figure 3.1).
V
DB
= Vref
R
2
R
1
+ R
2
V
TH
V
DB
V
TH
V
TL
1
f
OSC
(V)
Duty (DB) =
×
Here, T =
×
100 (%)
This applies when V
DB
> V
TL
.
If V
DB
< V
TL
, there is no PWM output.
Note:
V
TH
: 1.6 V (Typ)
V
TL
: 1.0 V (Typ)
Vref is typically 2.5 V. Select R
1
and R
2
so that 1.0 V
≤
V
DB
≤
1.6 V.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HA16117 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS Watchdog Timer |
| HA16117F | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS Watchdog Timer |
| HA16117FA | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS Watchdog Timer |
| HA16117FB | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS Watchdog Timer |
| HA16117FC | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS Watchdog Timer |
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