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參數(shù)資料
| 型號(hào)： | HA16121FPJ |
| 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)： | 15/34頁 |
| 文件大?。?/td> | 250K |
| 代理商： | HA16121FPJ |
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HA16116FP/FPJ, HA16121FP/FPJ
15
6. Setting of Intermittent Operation Timing when Overcurrent is Detected
6.1 Operation Principles
The current limiter on this IC detects overcurrent in each output pulse, providing pulse-by-pulse
overcurrent protection by limiting pulse output whenever an overcurrent is detected. If the overcurrent
state continues, the TIM pin and ON/
OFF
pin can be used to operate the IC intermittently. As a result, a
power supply with sharp vertical characteristics can be configured.
The ON/
OFF
timing for intermittent operation makes use of the hysteresis in the ON/
OFF
pin threshold
voltage V
ON
and V
OFF
, such that V
ON
– V
OFF
= V
BE
. Setting method is performed as described on the
following pages. V
BE
is based-emitter voltage of internal transistor.
Note:
When an overcurrent is detected in one channel of this IC but not the other, the pulse-by-pulse
current limiter still goes into operation on both channels. Also, when the intermittent operation
feature is not used, the TIM pin should be set to open state and the ON/
OFF
pin pulled up to high
level (above V
ON
).
390 k
4.7 k
+
R
R
A
B
ON/OFF
ON/OFF
TM
Latch
Q
R
S
Vref
generation
circuit
V
IN
Current
limiter
CL
Figure 6.1 Connection Diagram (example)
6.2 Intermittent Operation Timing Chart (V
ON/
OFF
only)
!
!
"
#
V
BE
2V
BE
3V
BE
4V
BE
*1
V
ON/OFF
b
Off
On
On
c
0 V
2T
ON
T
OFF
T
ON
t
a
a.
b.
c.
Note:
Continuous overcurrent detected
Intermittent operation starts (IC is off)
Overcurrent cleared (dotted line)
1.V is the base-emitter voltage in transistors on the IC, and is approximately 0.7 V
(see the figure 7.1).
For details, see the overall waveform timing diagram.
IC is on
IC is off
Figure 6.2 Intermittent Operation Timing Chart
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HA16116 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16121FP | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16116FP | 1500000 SYSTEM GATE 1.5 VOLT FPGA |
| HA16116FPJ | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| HA16129FPJ | Single Watchdog Timer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA16129 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Single Watchdog Timer |
| HA16129AFPJ | 制造商:未知廠家 制造商全稱: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:Renesas Technology Corp 功能描述:Single Watchdog Timer |
| HA16138 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:AC/DC Switching Converter Controller IC With High-Voltage Power MOS FET |
| HA16138PS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:AC/DC Switching Converter Controller IC With High-Voltage Power MOS FET |
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