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参数资料
| 型号： | NCP3101BUCK2GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/26页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP3101BUCK2G |
| 设计资源： | NCP3101BUCK2 EVB BOM NCP3101BUCK2GEVB Gerber Files |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.5V |
| 电流 - 输出： | 6A |
| 输入电压： | 5V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP3101 |
| 其它名称： | NCP3101BUCK2GEVBOS |
NCP3101C
DETAILED OPERATING DESCRIPTION
General
NCP3101C is a high efficiency integrated wide input
voltage 6 A synchronous PWM buck converter designed to
operate from a 4.5 V to 13.2 V supply. The output voltage of
the converter can be precisely regulated down to 800 mV
+1.0% when the VFB pin is tied to the output voltage. The
switching frequency is internally set to 275 kHz. A high gain
Operational Transconductance Error Amplifier (OTEA) is
used for feedback and stabilizing the loop.
Input Voltage
The NCP3101C can be used in many applications by
using the V CC and PWRVCC pins together or separately.
The PWRVCC pin provides voltage to the switching
MOSFETS. The V CC pin provides voltage to the control
circuitry and driver stage.
If the V CC and the PWRVCC pin are not tied together, the
input voltage of the PWRVCC pin can accept 2.7 V to 18 V.
If the V CC and PWRVCC pins are tied together the input
voltage range is 4.5 V to 13.2 V.
Duty Cycle and Maximum Pulse Width Limits
In steady state DC operation, the duty cycle will stabilize
at an operating point defined by the ratio of the input to the
output voltage. The NCP3101C can achieve an 82% duty
ratio. The part has a built in off ? time which ensures that the
bootstrap supply is charged every cycle. The NCP3101C is
capable of a 100 ns pulse width (minimum) and allows a
12 V to 0.8 V conversion at 275 kHz. The duty cycle limit
and the corresponding output voltage are shown below in
graphical format in Figure 18. The green area represents the
Although BST is rated at 13.2 V with reference to PHS, it can
also tolerate 26.5 V with respect to GND.
External Enable/Disable
Once the input voltage has exceeded the boost and UVLO
threshold at 3.82 V and V CC threshold at 4 V, the COMP pin
starts to rise. The PWRPHS node is tri ? stated until the
COMP voltage exceeds 830 mV. Once the 830 mV
threshold is exceeded, the part starts to switch and is
considered enabled. When the COMP pin voltage is pulled
below the 400 mV threshold, it disables the PWM logic, the
top MOSFET is driven off, and the bottom MOSFET is
driven on as shown in Figure 19. In the disabled mode, the
OTA output source current is reduced to 10 m A.
When disabling the NCP3101C using the COMP / Disable
pin, an open collector or open drain drive should be used as
shown in Figure 20.
0.83 V
COMP
BG
TG
Figure 19. Enable/Disable Driver State Diagram
safe operating area for the lowest maximum operational
duty cycle for 4.5 V and 13.2 V.
Disable
COMP
Disable
COMP
12. 5
Gate Signal Enable
Base Signal Enable
11. 5
10. 5
Figure 20. Recommended Disable Circuits
9. 5
8. 5
7. 5
6. 5
5. 5
D max = 0.82
D max = 0.88
Power Sequencing
Power sequencing can be achieved with NCP3101C using
two general purpose bipolar junction transistors or
MOSFETs. An example of the power sequencing circuit
using the external components is shown in Figure 21.
4. 5
3. 5
4. 5
5. 5
6. 5
7. 5
8. 5
9. 5
10. 5 11. 5
VSW
1.0V
VIN
VSW
3.3V
OUTPUT VOLTAGE (V)
Figure 18. Maximum Input to Output Voltage
Input voltage range (VCC and BST)
The input voltage range for both VCC and BST is 4.5 V
to 13.2 V with reference to GND and PHS, respectively.
NCP3101C
FB1
COMP
NCP3101C
FB1
COMP
Figure 21. Power Sequencing
http://onsemi.com
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|---|---|
| NCP3101CMNTXG | 功能描述:直流/直流开关调节器 INTEGRATED SWITCHER 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 |
| NCP3101MNTXG | 功能描述:直流/直流开关调节器 6A SYNC BUCK CNVERTR 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 |
| NCP3102BMNTXG | 功能描述:直流/直流开关调节器 10A SYNC BUCK CNVRTR 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 |
| NCP3102BUCK1GEVB | 功能描述:电源管理IC开发工具 NCP3102 DEMO BD 100X110M RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP3102BUCK2GEVB | 功能描述:电源管理IC开发工具 NCP3102 DEMO BD 55X25MM RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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