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参数资料
| 型号： | NCP1654PFCGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 21/23页 |
| 文件大小： | 228K |
| 描述： | EVAL BOARD FOR NCP1654PFCG |
| 设计资源： | NCP1654EVB BOM NCP1654EVB Gerber Files NCP1654EVB Schematic |
| 标准包装： | 1 |
| 主要目的： | AC/DC，次级 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 378 ~ 401 V |
| 输入电压： | 85 ~ 230 VAC，15VDC |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 65kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1654 |
| 其它名称： | NCP1654PFCGEVBOS |
NCP1654
http://onsemi.com
21
V
cc
Undervoltage LockOut (UVLO)
The device incorporates an Undervoltage Lockout block
to prevent the circuit from operating when Vcc is too low
in order to ensure a proper operation. An UVLO
comparator monitors V
cc
pin voltage to allow the NCP1654
to operate when V
cc
exceeds 10.5 V typically. The
comparator incorporates some hysteresis (1.5 V) to prevent
erratic operation as the V
cc
crosses the threshold. When V
cc
goes below the UVLO comparator lower threshold (9 V
typically), the circuit turns off. It is illustrated in Figure 47.
After startup, the operating range is between 9 V and 20 V.
Figure 47. V
cc
Undervoltage LockOut (UVLO)
V
CC
V
CC
I
CC
ON
OFF
State
<75 mA
V
CC(ON)
V
CC(OFF)
6 mA
Thermal Shutdown
An internal thermal circuitry disables the circuit gate
drive and then keeps the power switch off when the junction
temperature exceeds 150癈. The output stage is then
enabled once the temperature drops below typically 120癈
(i.e., 30癈 hysteresis). The thermal shutdown is provided
to prevent possible device failures that could result from an
accidental overheating.
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