NCP1200:Fixed Frequency Flyback Current Mode PWM Controller
Housed in SO-8 or DIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switch-Mode Power Supplies. Thanks to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short-circuit protection lets the designer build an extremely low-cost AC/DC wall adapter associated with a simplified feedback scheme. With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place. Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts.
技术特性
- No Auxiliary Winding Operation
- Internal Output Short−Circuit Protection
- Extremely Low No−Load Standby Power
- Current−Mode with Skip−Cycle Capability
- Internal Leading Edge Blanking
- 250 mA Peak Current Source/Sink Capability
- Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
- Direct Optocoupler Connection
- Built−in Frequency Jittering for Lower EMI
- SPICE Models Available for TRANsient and AC Analysis
- Internal Temperature Shutdown
- These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
应用
- AC/DC Adapters
- Offline Battery Chargers
- Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)
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封装图 PACKAGE DIMENSIONS
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评估板信息
| 评估板 |
状况 |
无铅(Pb-free) |
简短说明 |
| NCP1203GEVB |
Active |
 |
NCP1203 70W EVB |
订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP1200D100R2G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
SOIC-8 |
751-07 |
1 |
Tape and Reel |
2500 |
$0.4093 |
| NCP1200D40R2G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
SOIC-8 |
751-07 |
1 |
Tape and Reel |
2500 |
$0.4093 |
| NCP1200D60R2G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
SOIC-8 |
751-07 |
1 |
Tape and Reel |
2500 |
$0.4093 |
| NCP1200P100G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
PDIP-8 |
626-05 |
|
Tube |
50 |
$0.4467 |
| NCP1200P40G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
PDIP-8 |
626-05 |
|
Tube |
50 |
$0.4467 |
| NCP1200P60G |
Active |
|
Fixed Frequency Flyback Current Mode PWM Controller |
PDIP-8 |
626-05 |
|
Tube |
50 |
$0.4467 |
数据资料DataSheet下载
