FairchildFSEZ1317NY6WLED照明驱动解决方案
2011-11-30
作者:Fairchild公司
</a>PSR" title="PSR">PSR" title="PSR">PSR)和高度集成PWM控制器,待机功耗低于300mW,高压起动,具有最少的外接元件,没有次级反馈电路的恒压(CV)和恒流(CC)控制,PWM固定频率50kHz,主要用在手机,无绳电话,PDA,数码相机等充电器,替代线性变压器和RCC开关电源(SMPS).本文介绍了FSEZ1317主要特性, 功能方框图, 简化PSR反激转换器电路图, 高压起动电路图和6W LED照明驱动器主要特性,电路图和变压器电路图.
FSEZ1317: Primary-Side-Regulation PWM with POWER MOSFET Integrated
This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT™, of FSEZ1317 enables precise CC regulation and simplified circuit design for batterycharger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.
To minimize standby power consumption, the proprietary green mode provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements.
By using the FSEZ1317, a charger can be implemented with few external components and minimized cost.
FSEZ1317主要特性:
Low Standby Power Under 30mW
High-Voltage Startup
Fewest External Component Counts
Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
Green-Mode: Linearly Decreasing PWM Frequency
Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem
Cable Compensation in CV Mode
Peak-Current-Mode Control in CV Mode
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection with Auto Restart
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection with Auto Restart
Available in the 7-Lead SOP and DIP Packages
FSEZ1317应用:
Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools, etc.
Replaces linear transformers and RCC SMPS
![](http://files.chinaaet.com/images/20111130/ca3ce91a-e8a7-46e0-981b-98a1cb70aaf2.jpg)
图1. FSEZ1317功能方框图
![](http://files.chinaaet.com/images/20111130/53dc02a8-e7d8-4f99-b205-4a8490a291f3.jpg)
图2. FSEZ1317简化PSR反激转换器电路图
![](http://files.chinaaet.com/images/20111130/37d8b181-3b00-48eb-ac76-c6c156a9a1bb.jpg)
图3. FSEZ1317高压起动电路图
![](http://files.chinaaet.com/images/20111130/0f68f0d9-9750-4061-b9a2-94372bb27db3.jpg)
图4. FSEZ1317典型应用电路图
6W LED照明驱动器
The following reference design supports inclusion of FSEZ1317NY in design of LED illumination.
![](http://files.chinaaet.com/images/20111130/7c4c9fb3-6735-44ba-82bc-c922593b7109.jpg)
6W LED照明驱动器主要特性:
Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary- Feedback Circuitry
Built in 700V/1A MOSFET
Low EMI through Frequency Hopping
Low Power Consumption in Standby
Protection Functions: UVLO, Over-Voltage, Over-Current, and Over-Temperature
![](http://files.chinaaet.com/images/20111130/6c60f0e9-4e5d-4184-be37-cb738857b9f7.jpg)
图5. 6W LED照明驱动器电路图
![](http://files.chinaaet.com/images/20111130/21dbecc5-ae53-4f4d-b64c-9fa3a057bb12.jpg)
图6. 6W LED照明驱动器变压器电路图
详情请见:
http://www.fairchildsemi.com/ds/FS/FSEZ1317.pdf
和
http://www.fairchildsemi.com/support/referencedesign/docs/RD-L007.pdf
FSEZ1317: Primary-Side-Regulation PWM with POWER MOSFET Integrated
This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT™, of FSEZ1317 enables precise CC regulation and simplified circuit design for batterycharger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.
To minimize standby power consumption, the proprietary green mode provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements.
By using the FSEZ1317, a charger can be implemented with few external components and minimized cost.
FSEZ1317主要特性:
Low Standby Power Under 30mW
High-Voltage Startup
Fewest External Component Counts
Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry
Green-Mode: Linearly Decreasing PWM Frequency
Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem
Cable Compensation in CV Mode
Peak-Current-Mode Control in CV Mode
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection with Auto Restart
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection with Auto Restart
Available in the 7-Lead SOP and DIP Packages
FSEZ1317应用:
Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools, etc.
Replaces linear transformers and RCC SMPS
![](http://files.chinaaet.com/images/20111130/ca3ce91a-e8a7-46e0-981b-98a1cb70aaf2.jpg)
图1. FSEZ1317功能方框图
![](http://files.chinaaet.com/images/20111130/53dc02a8-e7d8-4f99-b205-4a8490a291f3.jpg)
图2. FSEZ1317简化PSR反激转换器电路图
![](http://files.chinaaet.com/images/20111130/37d8b181-3b00-48eb-ac76-c6c156a9a1bb.jpg)
图3. FSEZ1317高压起动电路图
![](http://files.chinaaet.com/images/20111130/0f68f0d9-9750-4061-b9a2-94372bb27db3.jpg)
图4. FSEZ1317典型应用电路图
6W LED照明驱动器
The following reference design supports inclusion of FSEZ1317NY in design of LED illumination.
![](http://files.chinaaet.com/images/20111130/7c4c9fb3-6735-44ba-82bc-c922593b7109.jpg)
6W LED照明驱动器主要特性:
Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary- Feedback Circuitry
Built in 700V/1A MOSFET
Low EMI through Frequency Hopping
Low Power Consumption in Standby
Protection Functions: UVLO, Over-Voltage, Over-Current, and Over-Temperature
![](http://files.chinaaet.com/images/20111130/6c60f0e9-4e5d-4184-be37-cb738857b9f7.jpg)
图5. 6W LED照明驱动器电路图
![](http://files.chinaaet.com/images/20111130/21dbecc5-ae53-4f4d-b64c-9fa3a057bb12.jpg)
图6. 6W LED照明驱动器变压器电路图
详情请见:
http://www.fairchildsemi.com/ds/FS/FSEZ1317.pdf
和
http://www.fairchildsemi.com/support/referencedesign/docs/RD-L007.pdf
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