- 您现在的位置：买卖IC网 > PDF目录68993 > FA3687V (FUJI ELECTRIC CO LTD) 0.4 A DUAL SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | FA3687V |
| 厂商： | FUJI ELECTRIC CO LTD |
| 元件分类： | 稳压器 |
| 英文描述： | 0.4 A DUAL SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 1.10 MM HEIGHT, TSSOP-16 |
| 文件页数： | 5/18页 |
| 文件大小： | 378K |
| 代理商： | FA3687V |
FA3687V
13
5. PWM comparator
The PWM output generates from the oscillator output, the error
amplifier output (FB1, FB2) and CS voltage (CS1, CS2) (Fig. 4).
The oscillator output is compared with the preferred lower
voltage between FB1 and CS1 for ch1. While the preferred
voltage is lower than oscillator output, the PWM output is low.
While the preferred voltage is higher than oscillator output, the
PWM output is high. Since the phase of Ch2 is the opposite
phase of Ch1, higher voltage between FB2 and CS2 is
preferred and while the preferred voltage is lower than the
oscillator output, the PWM output 2 is high. (Cannot be
observed externally) The output polarity of OUT1, OUT2
changes according to the condition of SEL pin. (See Fig. 6)
6. Soft start function
This IC has a soft start function to protect DC-to-DC converter
circuits from damage when starting operation. CS1 pin (Pin10),
and CS2 pin (Pin7) are used for soft start function of ch1 and
ch2 respectively (Fig. 5). When the supply voltage is applied to
the VCC pin and UVLO is cancelled, capacitor CCS1 and CCS2
is charged by VREG through the resistor R7 or R9. Therefore,
CS1 voltage gradually increases and CS2 voltage gradually
decreases. Since CS1 and CS2 pin are connected to the PWM
comparator internally, the pulses gradually widen and then the
soft start function operates (Fig. 6).
The maximum duty cycle can be set by using the CS pins.
(See “Design advice” about the detail)
Fig. 4
Fig. 5
Fig. 6
N/P ch.
drive
N/P ch.
drive
UVLO
Oscillator
output
CS1
CS2
FB2
FB1
OUT1
OUT2
PWM
Comp.1
PWM
Comp.2
PWM output1
9
8
SEL1
16
SEL2
2
PWM output2
13
10
CS1
VREG
CCS1
R7
13
7
VREG
CS2
R9
CCS2
Oscillator output
CS1 pin voltage
Er. Amp.1 output
PWM
output 1
OUT1
Pch.drive
(SEL1:VREG)
OUT1
Nch.drive
(SEL1:GND)
Oscillator output
CS2 pin voltage
Er. Amp.2 output
PWM
output2
OUT2
Pch.drive
(SEL2:VREG)
OUT2
Nch.drive
(SEL2:GND)
相关PDF资料 |
PDF描述 |
|---|---|
| FA5316S | 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5314S | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5317S | 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5310BS | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5311BS | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FA3687V-H1 | 制造商:Fuji Electric 功能描述: |
| FA-37PS/1 | 制造商:Cinch Connectors 功能描述:ADAPTOR D FILTERED 37 WAY 制造商:Cinch Connectors 功能描述:37 way filtered D adaptor,5A 1000pF |
| FA-37PS/1-LF | 制造商:Cinch Connectors 功能描述:ADAPTOR D FILTERED 37WAY 制造商:Cinch Connectors 功能描述:ADAPTOR, D, FILTERED, 37WAY 制造商:Cinch Connectors 功能描述:ADAPTOR, D, FILTERED, 37WAY; Connector Type:Filtered D Sub Gender Changer; Convert From Connector:D Sub; Convert From Positions:37; Convert From Gender:Plug; Convert To Connector:D Sub; Convert To Positions:37; Convert To ;RoHS Compliant: Yes |
| FA3863X | 功能描述:LED ORANGE CLEAR 3MM HI BRIGHT RoHS:是 类别:光电元件 >> LED - Millicandela 等级:2260mcd 正向电压:2.1V 电流 - 测试:20mA 波长 - 主:590nm 波长 - 峰值:- 视角:- 透镜类型:散射，有色 透镜样式/尺寸:圆顶椭圆，5.1mm x 3.7mm 封装/外壳:径向 尺寸/尺寸:- 高度:7.00mm 安装类型:通孔 包装:散装 在特定电流下的光通量 - 测试:- |
| FA3864X | 功能描述:LED ORANGE CLEAR 3MM HI BRIGHT RoHS:是 类别:光电元件 >> LED - Millicandela 等级:2260mcd 正向电压:2.1V 电流 - 测试:20mA 波长 - 主:590nm 波长 - 峰值:- 视角:- 透镜类型:散射，有色 透镜样式/尺寸:圆顶椭圆，5.1mm x 3.7mm 封装/外壳:径向 尺寸/尺寸:- 高度:7.00mm 安装类型:通孔 包装:散装 在特定电流下的光通量 - 测试:- |
发布紧急采购，3分钟左右您将得到回复。