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(kāi)關(guān)穩(wěn)壓器的高性能電壓模式控制
文件頁(yè)數(shù)： 11/38頁(yè)
文件大?。?/td> 170K
代理商： HA16108P
HA16107P/FP, HA16108P/FP
11
Undervoltage Lockout and PWM Output
The undervoltage lockout function turns off the PWM pulse output when the controller’s supply voltage
goes below a designated value. These ICs have two undervoltage lockout circuits. The UVL1 circuit
senses the supply voltage V
IN
. The UVL2 circuit senses the Vref voltage. A feature of these ICs is that
PWM output is turned on only when both voltages are above designated values. Otherwise, the IC operates
in standby mode.
The two built-in undervoltage lockout circuits make it possible to configure an extremely safe power
supply system. PWM output will shut down under a variety of abnormal conditions, such as if Vref is
shorted to ground while V
IN
is applied.
0
10 V
20 V
30 V
34 V
I
IN
9.5 V
16.2 V
*
1
0
10 V
20 V
30 V
*
2
6.45 V
Notes: 1.
2.
Breakdown voltage of
the internal Zener
diode (V
z
= 34 V typ).
Hysteresis characteristic.
0
10 V
20 V
30 V
Vref
6.45 V
0
10 V
20 V
30 V
OUT
5 V
4 V
PWM output shut-down region
UVL1 and UVL2
Operating region
V
IN
V
IN
V
IN
V
IN
V
IN
(UVL1)
Vref (UVL2)
PWM OUT
Standby mode
Note: Double circles indicate standby mode.
L
L
L
H
L
L
H
H
OUT
L
H
L
UVL1 (V
IN
and Vref)
UVL2 (Vref and PWM output)
Vref
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