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參數(shù)資料
| 型號： | CS5124XDR8 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | High Performance, Integrated Current Mode PWM Controllers |
| 中文描述： | 高性能，集成電流模式PWM控制器 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 172K |
| 代理商： | CS5124XDR8 |
9
C
be used in synchronized operation, the inductor value
should be recalculated to work with the slope compensa-
tion ramp reduced to 67% of the normal value.
Powering the CS5124/6 from a Transformer Winding
There are numerous ways to power the CS5124/6 from a
transformer winding to enable the converter to be operated
at high efficiency over a wide input range. Two ways are
shown in the application circuits.
The CS5124 application circuit (main application diagram)
is a flyback converter that uses a second flyback winding
to power V
CC
. R4 improves V
CC
regulation with load
changes by snubbing the turn off spike. Once the turn off
spike has subsided the voltage of this winding is voltage
proportional to the voltage on the main flyback winding.
This voltage is regulated because the main winding is
clamped by the regulated output voltage.
In the CS5126 application circuit (below) an extra winding
is added to the forward inductor to power V
CC
. This wind-
ing is phased to conduct during the off time of the forward
converter and performs the same function as the flyback
winding above.
A flyback winding from a forward transformer can also be
used to power V
CC
. Ideally the transformer volt-second
product of a forward converter would be constant over the
range of line voltages and load currents; and the trans-
former inductance could be chosen to store the required
level of energy during each cycle to power V
CC
. Even
though the flyback energy is not directly regulated it
would remain constant. Unfortunately in a real converter
there are many non-ideal effects that degrade regulation.
Transformer inductance varies, converter frequency varies,
energy stored in primary leakage inductance varies with
output current, stray transformer capacitances and various
parasitics all effect the level of energy available for V
CC
. If
too little energy is provided to V
CC
, the bootstrapping cir-
cuit must provide power and efficiency will be reduced. If
too much energy is provided V
CC
rises and may damage
the controller. If this approach is taken the circuit must be
carefully designed and component values must be con-
trolled for good regulation.
Application Information: continued
Additional Application Diagram
V
CC
UVLO
SYNC
SS
Gnd
GATE
IS
V
FB
R4
0.2
1/4W
Q2
IRF634
R6
17.4k
C2
1.5
F,
100V
C3
0.2
μ
F, 100V
10
μ
H
36-75V
IN
L1
R1
39k
R7
2k
C12
.01
μ
F
C9
.01
μ
F
R3
30.1k
C7
47
μ
F
ISOLATED
RTN
5V
OUT
ENABLE
48VRTN
C10
1000pF
C11
0.1
μ
F
TPS5908
U2
R8
10.0k
C1
1.5
F,
100V
SYNC
CS5126
R2
200k
MMBD6100L
D2
C5
1
F,
25V
C6
390pF
C8
47
μ
F
D3
11V
R10
10k
R9
10k
1000pF
C4
Q1
F2T493
T1
T2
MBRB2060CT
CTX15-14527
CTX15-14526
48V to 5V, 5A forward converter using the CS5126
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|---|---|
| CS5126XDR8 | High Performance, Integrated Current Mode PWM Controllers |
| CS5124XD8 | High Performance, Integrated Current Mode PWM Controllers |
| CS5127GDW16 | Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable |
| CS5127GDWR16 | Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CS5124XDR8G | 功能描述:電流型 PWM 控制器 Hi Performance Current Mode PWM RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| CS5126-KL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Cirrus Logic 功能描述: |
| CS5126-KLZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Cirrus Logic 功能描述: |
| CS5126-KP | 制造商:Rochester Electronics LLC 功能描述:2-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, - Bulk |
| CS5126XDR8 | 功能描述:IC REG CTRLR FLYBK ISO PWM 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
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