參數(shù)資料
型號(hào)： HA16116
廠商： Hitachi,Ltd.
元件分類(lèi)： 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(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 8/34頁(yè)
文件大小： 250K
代理商： HA16116
HA16116FP/FPJ, HA16121FP/FPJ
8
The triangle wave is a voltage waveform used as a reference in creating a PWM pulse. This block operates
according to the following principles. A constant current I
O
, determined by an external timing resistor R
T
,
is made to flow continuously to external timing capacitor C
T
. When the C
T
pin voltage exceeds the
comparator threshold voltage V
H
, the comparator output causes a switch to operate, discharging a current I
O
from C
T
. Next, when the C
T
pin voltage drops below threshold voltage V
L
, the comparator output again
causes the switch to operate, stopping the I
O
discharge. The triangle wave is generated by this repeated
operation.
Note that I
O
= 1.1 V/R
T
. Since the I
O
current mirror circuit has a very limited current producing ability, R
T
should be set to
≥
5 k
(I
O
≥
220
μ
A).
With this IC series, V
H
and V
L
of the triangle wave are fixed internally at about 1.6 V and 1.0 V by the
internal resistors R
A
, R
B
, and R
C
. The oscillator frequency can be calculated as follows.
1
t
1
+ t
2
+ t
3
f
OSC
=
t
1
=
C
T
(V
H
V
L
)
1.1 V/R
T
C
T
(V
H
V
L
)
(2
1)
×
1.1 V/R
T
C
T
R
T
(V
H
V
L
)
1.1 V
=
t
2
=
C
T
R
T
(V
H
V
L
)
1.1 V
=
= t
1
V
H
V
L
= 0.6 V
1
2t
1
+ t
3
f
OSC
≈
≈
1
1.1 C
T
R
T
+ 0.8
μ
s
[Hz]
t
1
= t
2
= 0.6
T
R
T
1.1
t
3
≈
0.8
μ
s (comparator delay time in the oscillator)
Accordingly,
Here,
Note that the value of f
OSC
may differ slightly from the above calculation depending on the amount of delay
in the comparator circuit. Also, at high frequencies this comparator delay can cause triangle wave
overshoot or undershoot, skewing the dead band threshold. Confirm the actual value in implementation
and adjust the constants accordingly.
相關(guān)PDF資料
PDF描述
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
HA16129 1500000 SYSTEM GATE 1.5 VOLT FPGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA16116FP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:Switching Regulator for Chopper Type DC/DC Converter
HA16116FP/FPJ/ 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:HA16116FP/FPJ/ HA16121FP/FPJ Datasheet 443K/SEP.18.03
HA16116FP-E 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Dual-OUT PWM DC to DC Controller/Step Down 20-Pin SOP Bulk
HA16116FPJ 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Switching Regulator for Chopper Type DC/DC Converter
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