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参数资料
| 型号： | NCV3066DR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER HIGH BRIGHT 8-SOIC |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 100kHz ~ 250kHz |
| 电源电压： | 3 V ~ 40 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
NCP3066, NCV3066
APPLICATIONS
Figures 15 through 24 show the simplicity and flexibility
of the NCP3066. Two main converter topologies are
demonstrated with actual test data shown below each of the
circuit diagrams. The demo boards have an input for a digital
dimming signal. You can provide a PWM signal to change
the average output current and reduce the LED brightness.
Figure 14 gives the relevant design equations for the key
parameters. Additionally, a complete application design aid
for the NCP3066 can be found at www.onsemi.com.
Parameter
ton
toff
t on
Step ? Down
Vout ) VF
Vin * VSWCE * Vout
ton
toff
Step ? Up
Vout ) VF * Vin
Vin * VSWCE
ton
toff
f
ton
toff
) 1
f
ton
toff
) 1
CT + 381.6 @ 10
C T
f osc
* 6
* 343
10 * 12
I L(avg)
Iout
Iout
ton
toff
) 1
I pk (Switch)
IL(avg) )
D IL
2
IL(avg) )
D IL
2
R SC
0.20
Ipk (Switch)
0.20
Ipk (Switch)
L
Vin * VSWCE * Vout
D IL
ton
Vin * VSWCE
D IL
ton
V ripple(pp)
D IL
1
8 f CO
2
) (ESR) 2
ton Iout
CO
) D IL
ESR
I out
V ref
R s
V ref
R s
9. V SWCE ? Darlington Switch Collector to Emitter Voltage Drop, refer to Figures 7 and 8.
10. V F ? Output rectifier forward voltage drop. Typical value for 1N5819 Schottky barrier rectifier is 0.4 V.
11. The calculated t on /t off must not exceed the minimum guaranteed oscillator charge to discharge ratio.
Figure 14. Design Equations
The Following Converter Characteristics Must Be Chosen:
V in ? Nominal operating input voltage.
V out ? Desired output voltage.
I out ? Desired output current.
D I L ? Desired peak ? to ? peak inductor ripple current. For maximum output current it is suggested that D I L be chosen to be
less than 10% of the average inductor current I L(avg) . This will help prevent I pk (Switch) from reaching the current limit threshold
set by R SC . If the design goal is to use a minimum inductance value, let D I L = 2(I L(avg) ). This will proportionally reduce
converter output current capability.
f ? Maximum output switch frequency.
V ripple(pp) ? Desired peak ? to ? peak output ripple voltage. For best performance the ripple voltage should be kept to a low
value since it will directly affect line and load regulation. Capacitor C O should be a low equivalent series resistance (ESR)
electrolytic designed for switching regulator applications.
http://onsemi.com
9
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| NCV3066PG | 功能描述:直流/直流开关调节器 1.5A SW REG FOR LED WITH ENABLE 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 |
| NCV3163 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3.4 A, Step−Up/Down/Inverting 50−300 kHz Switching Regulator |
| NCV3163MNR2G | 功能描述:直流/直流开关转换器 3.4A STEP UP/DWN/INV RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV3163PWG | 功能描述:直流/直流开关转换器 3.4A STEP UP/DWN/INV RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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