- 您现在的位置：买卖IC网 > PDF目录1809 > IR3800AMTRPBF (International Rectifier)IC REG BUCK SYNC ADJ 14A 15QFN PDF资料下载
参数资料
| 型号： | IR3800AMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 15/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 14A 15QFN |
| 产品培训模块： | SupIRBuck? Family and POL Design Tools Overview |
| 标准包装： | 1 |
| 系列： | SupIRBuck™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 12 V |
| 输入电压： | 2.5 V ~ 21 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 14A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 15-PowerVQFN |
| 包装： | 标准包装 |
| 供应商设备封装： | PQFN（5x6） |
| 产品目录页面： | 1384 (CN2011-ZH PDF) |
| 其它名称： | IR3800AMTRPBFDKR |
PD-60353
IR3800AMPbF
Based on the frequency of the zero generated by
the output capacitor and its ESR versus
crossover frequency, the compensation type can
be different. The table below shows the
compensation types and location of crossover
Select crossover frequency:
F o < F ESR and F o ≤ ( 1/5 ~ 1/10 ) * F s
Fo=60kHz
frequency.
Since: FLC<Fo<Fs/2<FESR , typeIII method B is
Compensator
type
Type II(PI)
Type III (PID)
Method A
Type III(PID)
Method B
F ESR vs. F o
F LC <F ESR <F o <F s/2
F LC <F o <F ESR <F s/2
F LC <F o <F s/2 <F ESR
Output
capacitor
Electrolytic
, Tantalum
Tantalum,
ceramic
Ceramic
selected to place the poles and zeros.
The following design rules will give a crossover
frequency approximately one-tenth of the
switching frequency. The higher the band width,
the potentially faster the load transient response.
The DC gain will be large enough to provide high
DC-regulation accuracy (typically -5dB to -12dB).
The phase margin should be greater than 45 o for
Table1- The compensation type and location
overall stability.
F Z 2 = F o *
of F ESR versus F o
The details of these compensation types are
discussed in application note AN-1043 which can
be downloaded from IR’s website at www.irf.com.
Desired Phase Boost: Θ max = 70
1 - Sin Θ
1 + Sin Θ
o
F Z 2 = 10 . 58 kHz
For this design we have:
F P 2 = F o *
V in =12V
V o =1.8V
V osc =1.25V
V ref =0.6V
g m =1000umoh
L o =1.0uH
C o =6x22uF, ESR=0.5mOhm
F s =300kHz
1 + Sin Θ
1 - Sin Θ
F P 2 = 340 . 28 kHz
Select : F Z1 = 0 . 5 * F Z 2 and F P3 = 0.5 * F s
Select : C 7 = 180pF
The value of the capacitance used in the
compensator design must be the small signal
R 3 =
2 π * F o * L o * C o * V OSC
C 7 * V in
, R 3 = 15 . 71 K ? , check R 3 ≥
2
g m
C 4 =
; C 4 = 1.9nF, Select : C 4 = 2 . 2 nF
value. For instance, the small signal capacitance
of the 22uF capacitor used in this design is 12uF
at 1.8 VDC bias and 600 kHz frequency. It is this
value that must be used for all computations
related to the compensation. The small signal
value may be obtained from the manufacturer’s
Select : R 3 = 1 5.80K Ω
Calculate C 4 and C 3 :
1
2 π * F Z1 * R 3
datasheets, design tools or SPICE models.
Alternatively, they may also be inferred from
C 3 =
1
2 π * F P 3 * R 3
; C 3 = 67 . 15 pF , Select : C 3 = 39 pF
measuring the power stage transfer function of
; R 10 = 2 . 60 K Ω , check R 10 ≥
R 10 =
the converter and measuring the double pole
frequency FLC and using equation (11) to
compute the small signal Co.
These result to:
Calculate R 10 , R 8 and R 9 :
1
2 π * C 7 * F P 2
Select : R 10 = 2 . 61 K Ω
1
g m
- R 10 ; R 8 = 80 . 97 K Ω , Select : R 8 = 80 . 6 K Ω
* R 8 ; R 9 = 40 . 30 K Ω , Select : R 9 = 40 . 2 K Ω
F LC =18.76kHz
F ESR =4.4MHz
F s/2 =300kHz
11/04/08
R 8 =
R 9 =
1
2 π * C 7 * F Z 2
V ref
V o - V ref
15
相关PDF资料 |
PDF描述 |
|---|---|
| IR3800MTR1PBF | IC REG BUCK SYNC ADJ 12A QFN |
| IR3801AMTRPBF | IC REG BUCK SYNC ADJ 9A 15QFN |
| IR3801MTR1PBF | IC REG BUCK SYNC ADJ 7A QFN |
| IR3802AMTR1PBF | IC REG BUCK SYNC ADJ 6A QFN |
| IR3802MTRPBF | IC REG BUCK SYNC ADJ 4A 15QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3800MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGHLY INTEGRATED 12A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR |
| IR3800MTR1PBF | 功能描述:直流/直流开关调节器 12A SupIRBuck Reg 600kHz, 2.5-21V in RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| IR3800MTRPBF | 功能描述:直流/直流开关调节器 12A SupIRBuck Reg 600kHz, 2.5-21V in RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| IR3801AMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:SupIRBuckTM |
| IR3801AMTR1PBF | 制造商:International Rectifier 功能描述:REGULATOR ADJ VOLTAGE 9A 15QFN |
发布紧急采购，3分钟左右您将得到回复。