参数资料
| 型号： | NCP3020BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/23页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 8-SOIC |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 670kHz |
| 占空比： | 80% |
| 电源电压： | 4.7 V ~ 28 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： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 标准包装 |
| 其它名称： | NCP3020BDR2GOSDKR |
NCP3020A, NCP3020B, NCV3020A, NCV3020B
VCC
INTERNAL BIAS
POR/STARTUP
THERMAL SD
VC
BOOST
CLAMP
BST
OSCILLATOR
CLK/
DMAX/
SOFT
START
LEVEL
SHIFT
VCC
HSDR
VSW
RAMP
1.5 V
GATE
DRIVE
LOGIC
CURRENT
LIMIT
SAMPLE &
HOLD
ISET
COMP
+
?
VC
REF
OTA
PWM
COMP
LSDR
FB
+
?
+
OOV
OUV
BST_CHRG
GND
?
Figure 2. NCP3020 Block Diagram
PIN FUNCTION DESCRIPTION
Pin
1
2
3
4
5
6
7
8
Pin Name
V CC
COMP
FB
GND
LSDR
VSW
HSDR
BST
Description
The V CC pin is the main voltage supply input. It is also used in conjunction with the VSW pin to sense current
in the high side MOSFET.
The COMP pin connects to the output of the Operational Transconductance Amplifier (OTA) and the positive
terminal of the PWM comparator. This pin is used in conjunction with the FB pin to compensate the voltage
mode control feedback loop.
The FB pin is connected to the inverting input of the OTA. This pin is used in conjunction with the COMP pin to
compensate the voltage mode control feedback loop.
Ground Pin
The LSDR pin is connected to the output of the low side driver which connects to the gate of the low side
N ? FET. It is also used to set the threshold of the current limit circuit (I SET ) by connecting a resistor from LSDR
to GND.
The VSW pin is the return path for the high side driver. It is also used in conjunction with the V CC pin to sense
current in the high side MOSFET.
The HSDR pin is connected to the output of the high side driver which connects to the gate of the high side
N ? FET.
The BST pin is the supply rail for the gate drivers. A capacitor must be connected between this pin and the
VSW pin.
http://onsemi.com
2
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