- 您现在的位置：买卖IC网 > PDF目录1811 > IRU3039CHTR (International Rectifier)IC REG CTRLR BUCK PWM VM 20-MLPQ PDF资料下载
参数资料
| 型号： | IRU3039CHTR |
| 厂商： | International Rectifier |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-MLPQ |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 400kHz |
| 占空比： | 88% |
| 电源电压： | 4.75 V ~ 20 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-MLPQ |
| 包装： | 剪切带 (CT) |
| 其它名称： | *IRU3039CHTR IRU3039CHTRCT |
IRU3039(PbF)
For a general solution for unconditionally stability for
F P1 = 0
( C C × +C C )
2 π× R 7 ×
ceramic capacitor with very low ESR and any type of
output capacitors, in a wide range of ESR values we
should implement local feedback with a compensation
network. The typically used compensation network for
voltage-mode controller is shown in Figure 13.
F P2 =
F P3 =
1
2 π× R 8 × C 10
1
12 11
12 11
?
1
2 π× R 7 × C 12
F Z1 =
F Z2 = 2 π× C 10 × (R 6 + R 8 ) ?
Z IN
C 10
R 8
V OUT
R 6
R 7
C 12
C 11
Z f
1
2 π× R 7 × C 11
1
1
2 π× C 10 × R 6
Cross Over Frequency:
F O = R 7 × C 10 ×
V OSC
2 π× Lo × Co
Gain(dB)
R 5
Fb
Vp=V REF
E/A
Comp
Ve
V IN 1
×
Where:
V IN = Maximum Input Voltage
V OSC = Oscillator Ramp Voltage
---(21)
H(s) dB
Lo = Output Inductor
Co = Total Output Capacitors
The stability requirement will be satisfied by placing the
F Z 1
F Z 2
F P 2
F P 3
Frequency
poles and zeros of the compensation network according
to following design rules. The consideration has been
Figure 13 - Compensation network with local
feedback and its asymptotic gain plot.
In such configuration, the transfer function is given by:
taken to satisfy condition (20) regarding transconduc-
tance error amplifier.
These design rules will give a crossover frequency ap-
V e
V OUT
=
1 - g m Z f
1 + g m Z IN
proximately one-tenth of the switching frequency. The
higher the band width, the potentially faster the load tran-
sient speed. The gain margin will be large enough to
The error amplifier gain is independent of the transcon-
ductance under the following condition:
provide high DC-regulation accuracy (typically -5dB to -
12dB). The phase margin should be greater than 45 for
g m Z f >> 1
and
g m Z IN >>1
---(20)
overall stability.
By replacing Z IN and Z f according to Figure 9, the trans-
former function can be expressed as:
Based on the frequency of the zero generated by ESR
versus crossover frequency, the compensation type can
[
( )]
1+sR 7 C 12 +C 11
H(s) =
1
sR 6 (C 12 +C 11 )
×
(1+sR 7 C 11 ) × [1+sC 10 (R 6 +R 8 )]
C 12 C 11
× (1+sR 8 C 10 )
be different. The table below shows the compensation
type and location of crossover frequency.
Compensator Location of Zero Typical
Type Crossover Frequency Output
As known, transconductance amplifier has high imped-
ance (current source) output, therefore, consider should
be taken when loading the E/A output. It may exceed its
source/sink output current capability, so that the ampli-
fier will not be able to swing its output voltage over the
necessary range.
Type II (PI)
Type III (PID)
Method A
Type III (PID)
Method B
(F O )
F PO < F ZO < F O < f S /2
F PO < F O < F ZO < f S /2
F PO < F O < f S /2 < F ZO
Capacitor
Electrolytic,
Tantalum
Tantalum,
Ceramic
Ceramic
The compensation network has three poles and two ze-
ros and they are expressed as follows:
Table - The compensation type and location of zero
crossover frequency.
Detail information is dicussed in application Note AN-
1043 which can be downloaded from the IR Web-Site.
12
www.irf.com
相关PDF资料 |
PDF描述 |
|---|---|
| IRU3046CFTR | IC REG CTRLR BUCK PWM VM 24TSSOP |
| IRU3047CWTR | IC REG CTRLR BUCK PWM VM 20-SOIC |
| IRU3048CFTR | IC REG CTRLR BUCK PWM VM 16TSSOP |
| IRU3055CQTR | IC CTRL SYNC 3-PHASE 36-QSOP |
| IRU3065CLTR | IC REG CTRLR INV PWM SOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRU3046 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3046CF | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3046CFTR | 功能描述:IC REG CTRLR BUCK PWM VM 24TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:75 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.3 V ~ 13.5 V 降压:是 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:0°C ~ 70°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:管件 产品目录页面:1051 (CN2011-ZH PDF) 其它名称:296-2543-5 |
| IRU3046CFTRPBF | 制造商:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
| IRU3047 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER |
发布紧急采购，3分钟左右您将得到回复。