參數(shù)資料
型號(hào)： HA16108P
廠商： Hitachi,Ltd.
元件分類： FPGA
英文描述： 1500000 SYSTEM GATE 1.5 VOLT FPGA
中文描述： PWM開關(guān)穩(wěn)壓器的高性能電壓模式控制
文件頁(yè)數(shù)： 19/38頁(yè)
文件大?。?/td> 170K
代理商： HA16108P
HA16107P/FP, HA16108P/FP
19
Application Note
Case:
When DC power is applied directly as the power supply of the HA16107/HA16108, without using the
transformer backup coil.
Phenomenon:
The IC may not be activated in the case of a circuit in which V
IN
rises quickly (10 V/100
μ
s or faster),
such as that shown in figure 2.
Reason:
Because of the IC circuit configuration, the timer latch block operates first.
Remedy (counter measure):
Take remedial action such as configuring a time constant circuit as shown in figure 3, to keep the V
IN
rise speed below 10 V/100
μ
s.
If the IC power supply consists of an activation resistance and backup coil, as in an AC/DC converter, The
V
IN
rise speed is usually around 1 V/100
μ
s, and there is no risk of this phenomenon occurring.
Input
V
IN
V
IN
HA16107
Series
GND
Feedback
Output
Figure 2 Example of Circuit with Fast V
IN
Rise Time
Input
V
IN
V
IN
18 V
1
μ
FC
HA16107
Series
GND
Feedback
Output
R 51
Time constant
circuit
Figure 3 Sample Remedial Circuit
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