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參數(shù)資料
| 型號： | CS5126 |
| 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)： | 7/10頁 |
| 文件大?。?/td> | 172K |
| 代理商： | CS5126 |
C
7
Application Information: continued
The Line BIAS pin shows a significant change in the regu-
lated V
CC
voltage when sinking large currents. This will
show up as poor line regulation with a low value pull-up
resistor. Typical regulated V
CC
vs BIAS pin sink current is
shown in Figure 1.
Figure 1. Regulated V
CC
vs BIAS Sink Current
Clock Synchronization Pin (CS5126 Only)
The CS5126 can be synchronized to signals ranging from
30% slower to several times faster than the internal oscilla-
tor frequency. If the part is synchronized to a fast signal,
maximum duty cycle will be reduced as the frequency
increases as shown in Figure 2.
Figure 2: CS5126 Maximum Duty Cycle vs Frequency (Synchronized
Operation)
If the converter is initially free running and a sync signal is
applied, the current oscillator cycle will terminate and the
oscillator will lock on to the sync signal. The SYNC pin
works with a positive edge triggered signal. When the sync
signal transitions high the current PWM cycle terminates
and a new cycle begins as shown in Figure 3. The typical
phase lag between the rising edge of the SYNC signal and
the rising edge of the Gate is shown in Figure 4. When this
pin is held high or low the internal clock determines the
oscillator frequency.
Figure 3. Synchronized Operation
Figure 4 : Typical Phase Lag between SYNC and GATE on.
Gate Drive
Rail to rail gate driver operation can be obtained (up to
13.5V) over a range of MOSFET input capacitance if the
gate resistor value is kept low. Figure 5 shows the high
gate drive level vs. the series gate resistance with V
CC
= 8V
driving an IRF220.
Figure 5. Gate Drive vs Gate Resistor Driving an IRF220 (V
CC
= 8V)
8.5
8
7.5
7
6.5
6
0
0.3
0.5
Gate Resistor Value
2.5
5
11
P
140
130
120
110
100
90
80
70
200kHz
300kHz
400kHz
500kHz
600kHz
P
°
SYNC
OSC
GATE
125
°
C
-40
°
C
0.82
0.77
0.72
200kHz
300kHz
400kHz
500kHz
600kHz
M
Frequency
25
°
C
8.3
8.2
8.1
8
7.9
5
μ
10
μ
A
20
μ
A
Bias Current (I
BIAS
)
50
μ
A
100
μ
A
200
μ
A
C
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| CS5127GDW16 | Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(biāo)準(zhǔn)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) |
| CS-5127 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual Output Non-Synchronous Buck Controller with Sync Function and Secon |
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