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參數(shù)資料
| 型號： | CS5150 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | CPU 4-Bit Synchronous Buck Controller |
| 中文描述： | CPU的4位同步降壓控制器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 322K |
| 代理商： | CS5150 |
Applications Information: continued
C
8
If the maximum on time is exceeded while responding to a
sudden increase in load current, a normal off time occurs to
prevent saturation of the output inductor.
Figure 7: CS5150H demonstration board response to a 0.5 to 13A load
pulse (output set for 2.8V).
Figure 8: CS5150H demonstration board response to 13A load turn on
(output set for 2.8V). Upon completing a normal off time, the V
2
con-
trol loop immediately connects the inductor to the input voltage, pro-
viding 100% duty cycle. Regulation is achieved in less than 20μs.
Figure 9: CS5150H demonstration board response to 13A load turn off
(output set for 2.8V). V
2
control topology immediately connects
inductor to ground, providing 0% duty cycle. Regulation is achieved in
less than 10μs.
V
CC1
Monitor
To maintain predictable startup and shutdown characteris-
tics an internal V
CC1
monitor circuit is used to prevent the
part from operating below 3.75V minimum startup. The
V
CC1
monitor comparator provides hysteresis and guaran-
tees a 3.70V minimum shutdown threshold.
Short Circuit Protection
A lossless hiccup mode short circuit protection feature is
provided, requiring only the soft start capacitor to imple-
ment. If a short circuit condition occurs (V
FFB
< 1V), the V
FFB
low comparator sets the FAULT latch. This causes the top
MOSFET to shut off, disconnecting the regulator from its
input voltage. The soft start capacitor is then slowly dis-
charged by a 2μA current source until it reaches its lower
0.7V threshold. The regulator will then attempt to restart nor-
mally, operating in its extended off time mode with a 50%
duty cycle, while the soft start capacitor is charged with a
60μA charge current.
If the short circuit condition persists, the regulator output
will not achieve the 1V low V
FFB
comparator threshold
before the soft start capacitor is charged to its upper 2.5V
threshold. If this happens the cycle will repeat itself until the
short is removed. The soft start charge/discharge current
ratio sets the duty cycle for the pulses (2μA/60μA = 3.3%),
while actual duty cycle is half that due to the extended off
time mode (1.65%).
Protection and Monitoring Features
Trace1 - Regulator Output Voltage (1V/div.)
Trace 2 - Inductor Switching Node (5V/div.)
Trace 3 - Output Current (13 to 0.5 Amps) (20V/div.)
Trace 1 - Regulator Output Voltage (1V/div.)
Trace 2 - Inductor Switching Node (5V/div.)
Trace 3 - Output Current (0.5 to 13 Amps) (20V/div.)
Trace 1 - Regulator Output Voltage (1V/div.)
Trace 3 - Regulator Output Current (20V/div.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CS5150H | CPU 4-Bit Synchronous Buck Controller |
| CS5150GD16 | CPU 4-Bit Synchronous Buck Controller |
| CS5150GN16 | CPU 4-Bit Synchronous Buck Controller |
| CS5151GN16 | CPU 4-Bit Nonsynchronous Buck Controller |
| CS5151GDR16 | CPU 4-Bit Nonsynchronous Buck Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CS-515003 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Attenuator |
| CS-5150D16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| CS5150GD16 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
| CS5150GDR16 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS5150GN16 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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