參數(shù)資料
型號(hào): HA17524P
廠商: Hitachi,Ltd.
元件分類: FPGA
英文描述: 3000000 SYSTEM GATE 1.5 VOLT FPGA
中文描述: 開關(guān)穩(wěn)壓器控制器
文件頁數(shù): 5/18頁
文件大?。?/td> 88K
代理商: HA17524P
HA17524P/FP
5
I
I
Q
1
R
T
C
T
Q
2
V
REF
Q
Discharge
3
V
H
V
L
V
T
C
T
Terminal Waveform
V
REF
– V
EB
(Q
2
) – V
EB
(Q
3
)
I
V = V – V
L
3.8 – 0.9 = 2.9 V
1
I
T C
T
·
V ·
R
T
6
7
Figure 4 Oscillating Circuit and C
T
Terminal Waveform
The oscillator output pulse signal is used as the flip flop clock pulse and as switching pulses for the output
transistors, synchronous to the clock pulse.
The pulse-widths which can be controlled by the timing capacitor C
T
as shown in figure 5, increases output
dead time.
0.001
0.003
0.01
0.03
0.1
0.1
0.3
1.0
3
10
Timing Capacitance C
T
(
μ
F)
D
μ
s
V = 20 V
R = 10 k
Ta = 25
°
C
Figure 5 Dead Time vs Timing Capacitance
Reference Voltage: The built-in regulator (reference voltage: V
REF
= 5 ±0.4 V) can be used as a reference
power supply for the error amplifier, which determines output voltage (V
OUT
). It is also connected as a bias
source for another circuits in IC.
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