NCP1562: High Performance Active Clamp/Reset PWM Controller
The NCP1562x is a family of voltage mode controllers designed for dc-dc converters requiring high efficiency and low parts count. These controllers incorporate two in phase outputs with an overlap delay to prevent simultaneous conduction and facilitates soft switching. The main output is designed for driving a forward converter primary MOSFET. The secondary output is designed for driving an active clamp circuit MOSFET, a synchronous rectifier on the secondary side, or an asymmetric half bridge circuit. The NCP1562 family reduces component count and system size by incorporating high accuracy on critical specifications such as maximum duty cycle limit, undervoltage detector and overcurrent threshold. Two distinctive features of the NCP1562 are soft-stop and a cycle skip current limit with a time threshold. Softstop circuitry powers down the converter in a controlled manner if a severe fault is detected. The cycle skip detector enables a softstop sequence if a continuous overcurrent condition is present. Additional features found in the NCP1562 include line feedforward, frequency synchronization up to 1.0 MHz, cycle by cycle current limit with leading edge blanking (LEB), independent under and overvoltage detectors, adjustable output overlap delay, programmable maximum duty cycle, internal startup circuit and soft-start.
技术特性
- Dual Control Outputs with Adjustable Overlap Delay
- >2.0 A Output Drive Capability
- Soft--Stop Powers Down Converter in a Controlled Manner
- Cycle--by--Cycle Current Limit
- Cycle Skip Initiated if Continuous Current Limit Condition Exists
- Voltage Mode Operation with Input Voltage Feedforward
- Fixed Frequency Operation up to 1.0 MHz
- Bidirectional Frequency Synchronization
- Independent Line Undervoltage and Overvoltage Detectors
- Accurate Programmable Maximum Duty Cycle Limit
- Programmable Maximum Volt--Second Product
- Programmable Soft--Start
- Internal 100 V Startup Circuit
- Precision 5.0 V Reference
- These are Pb--Free Devices
|
终端产品
- Desktop / Server PSU
- Telecom base station PSU
- Flat TV PSU
应用
- High power isolated DC/DC converters
- Power supplies
封装图 PACKAGE DIMENSIONS
|
评估板信息
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 |
| NCP1562ADBR2G |
Active |
|
High Performance Active Clamp/Reset PWM Controller |
TSSOP-16 |
948F-01 |
1 |
Tape and Reel |
2500 |
$1.3333 |
| NCP1562ADR2G |
Active |
|
High Performance Active Clamp/Reset PWM Controller |
SOIC-16 |
751B-05 |
1 |
Tape and Reel |
2500 |
$1.3333 |
| NCP1562BDBR2G |
Active |
|
High Performance Active Clamp/Reset PWM Controller |
TSSOP-16 |
948F-01 |
1 |
Tape and Reel |
2500 |
$1.3333 |
| NCP1562BDR2G |
Active |
|
High Performance Active Clamp/Reset PWM Controller |
SOIC-16 |
751B-05 |
1 |
Tape and Reel |
2500 |
$1.3333 |
数据资料DataSheet下载
