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參數(shù)資料
| 型號： | HA16114FPJ |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | ID ISC.ANT.MUX 8X ANT MULTIPLEXR |
| 中文描述： | 開關(guān)穩(wěn)壓器的斬波式直流/直流轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/38頁 |
| 文件大小： | 275K |
| 代理商： | HA16114FPJ |
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HA16114P/PJ/FP/FPJ, HA16120FP/FPJ
8
1.2 External Synchronization
These ICs have a sync input pin so that they can be synchronized to a primary-control AC/DC converter.
Pulses from the secondary winding of the switching transformer should be dropped through a resistor
voltage divider to the sync input pin. Synchronization takes place at the falling edge, which is optimal for
multiple-output power supplies that synchronize with a flyback AC/DC converter.
The sync input pin (
SYNC
) is connected internally through a synchronizing circuit to the sawtooth
oscillator to synchronize the sawtooth waveform (see figure 1.2).
Synchronization is with the falling edge of the external sync signal.
The frequency of the external sync signal must be in the range f
OSC
< f
SYNC
< f
OSC
×
2.
The duty cycle of the external sync signal must be in the range 5% < t
1
/t
2
< 50% (t
1
= 300 ns Min).
With external synchronization, V
TH
'
can be calculated as follows.
f
OSC
f
SYNC
Note:
When not using external synchronization, connect the
SYNC
pin to the Vref pin.
V
TH
’ = (V
TH
V
TL
)
×
+ V
TL
Sawtooth wave
(f
OSC
)
V
(1.0 V typ)
SYNC
pin
(f
SYNC
)
Synchronized
at falling edge
V (1.6 V typ)
V
TH
Vref
1 V
t
1
t
2
Figure 1.2 External Synchronization
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HA16114FP | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16114P | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16120FP | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16114PJ | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16120FPJ | CAP 1000PF 25V 5% NP0(C0G) SMD-0603 TR-7 PLATED-NI/SN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA16114P | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Switching Regulator for Chopper Type DC/DC Converter |
| HA16114P/PJ/FP/FPJ/ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HA16114P/PJ/FP/FPJ/ HA16120FP/FPJ Datasheet 504K/SEP.18.03 |
| HA16114P-E | 制造商:Renesas Electronics Corporation 功能描述:Power Sup,SW Reg.Control IC,S-Down,DIP16 |
| HA16114PJ | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Switching Regulator for Chopper Type DC/DC Converter |
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