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PowerInt 公司的TOPSwitch-JX系列(TOP264-271)集成了725V功率MOSFET,高壓開關電流源,多模式PWM控制,熱關斷電路,故障保護和其它控制電路, 265 VAC電壓下無負載的功耗低于100mW.本文介紹了TOPSwitch-JX系列(TOP264-271)主要特性, 方框圖, 通用輸入高效19V 65W反激電源電路圖和采用TOP265EG的12V 30W高效待機電源設計案例的電路圖和所用材料清單.
TOPSwitch-JX TOP264-271 cost effectively incorporates a 725 V power MOSFET, high voltage switched current source, multi-mode PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.
TOPSwitch-JX 系列主要特性:
EcoSmart? - Energy Efficient
? Energy efficient over entire load range
? No-load consumption below 100 mW at 265 VAC
? Up to 750 mW standby output power for 1 W input at 230 VAC
High Design Flexibility for Low System Cost
? Multi-mode PWM control maximizes efficiency at all loads
? 132 kHz operation reduces transformer and power supply size
? 66 kHz option for highest efficiency requirements
? Accurate programmable current limit
? Optimized line feed-forward for line ripple rejection
? Frequency jittering reduces EMI filter cost
? Fully integrated soft-start for minimum startup stress
? 725 V rated MOSFET
? Simplifies meeting design derating requirements
Extensive Protection Features
? Auto-restart limits power delivery to <3% during overload faults
? Output short-circuit protection (SCP)
? Output over-current protection (OCP)
? Output overload protection (OPP)
? Output overvoltage protection (OVP)
? User programmable for hysteretic/latching shutdown
? Simple fast AC reset
? Primary or secondary sensed
? Line undervoltage (UV) detection prevents turn-off glitches
? Line overvoltage (OV) shutdown extends line surge withstand
? Accurate thermal shutdown with large hysteresis (OTP)
? Heat transfer to both PCB and heat sink
? Optional external heat sink provides thermal impedance equivalent to a TO-220
? eSIP?-7C package:
? Vertical orientation for minimum PCB footprint
? Simple heat sink mounting using clip provides thermal impedance equivalent to a TO-220
? Extended creepage to DRAIN pin
? Heat sink is connected to SOURCE for low EMI
圖1.TOPSwitch-JX系列功能方框圖(E 和V 封裝).
圖2.TOPSwitch-JX系列通用輸入高效19V 65W反激電源電路圖
采用TOPSwitch-JX系列TOP265EG的12V 30W高效待機電源設計案例
12V 30W設計案例主要特性:
?
Highly energy efficient
?
Full load efficiency >90%
?
Efficiency >87% above 10% load
?
Average efficiency >90% (25%, 50%, 75%, 100% load points)
?
No-load input power <100 mW
?
Simplifies meeting ENERGY STAR 2.0, 80 Plus and EuP requirements
?
725 V MOSFET rating allowed high turns ratio (VOR) and use of 60 V Schottky output diode
?
Low cost, low component count and small PCB footprint solution
?
Performance met without synchronous output rectification
?
132 kHz operation optimized core size and efficiency performance
?
Low-profile eSIP package
Integrated Protection and Reliability Features
?
Line under-voltage lock out (UVLO)
?
Primary sensed latching output overvoltage shutdown (OVP) with fast AC reset
?
Auto recovery output over current (OCP)
?
Meets limited power source (LPS) <100 VA requirement with a single point of failure
?
Accurate thermal shutdown with large hysteresis
圖3.設計案例PCB外形圖(2.97 x 2.14 吋).
設計電源指標:
圖4. 12V 30W設計案例電路圖
設計案例材料清單:
圖5. 12V 30W設計案例變壓器電框圖
TOPSwitch-JX TOP264-271 cost effectively incorporates a 725 V power MOSFET, high voltage switched current source, multi-mode PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.
TOPSwitch-JX 系列主要特性:
EcoSmart? - Energy Efficient
? Energy efficient over entire load range
? No-load consumption below 100 mW at 265 VAC
? Up to 750 mW standby output power for 1 W input at 230 VAC
High Design Flexibility for Low System Cost
? Multi-mode PWM control maximizes efficiency at all loads
? 132 kHz operation reduces transformer and power supply size
? 66 kHz option for highest efficiency requirements
? Accurate programmable current limit
? Optimized line feed-forward for line ripple rejection
? Frequency jittering reduces EMI filter cost
? Fully integrated soft-start for minimum startup stress
? 725 V rated MOSFET
? Simplifies meeting design derating requirements
Extensive Protection Features
? Auto-restart limits power delivery to <3% during overload faults
? Output short-circuit protection (SCP)
? Output over-current protection (OCP)
? Output overload protection (OPP)
? Output overvoltage protection (OVP)
? User programmable for hysteretic/latching shutdown
? Simple fast AC reset
? Primary or secondary sensed
? Line undervoltage (UV) detection prevents turn-off glitches
? Line overvoltage (OV) shutdown extends line surge withstand
? Accurate thermal shutdown with large hysteresis (OTP)
? Heat transfer to both PCB and heat sink
? Optional external heat sink provides thermal impedance equivalent to a TO-220
? eSIP?-7C package:
? Vertical orientation for minimum PCB footprint
? Simple heat sink mounting using clip provides thermal impedance equivalent to a TO-220
? Extended creepage to DRAIN pin
? Heat sink is connected to SOURCE for low EMI
圖1.TOPSwitch-JX系列功能方框圖(E 和V 封裝).
圖2.TOPSwitch-JX系列通用輸入高效19V 65W反激電源電路圖
采用TOPSwitch-JX系列TOP265EG的12V 30W高效待機電源設計案例
12V 30W設計案例主要特性:
?
Highly energy efficient
?
Full load efficiency >90%
?
Efficiency >87% above 10% load
?
Average efficiency >90% (25%, 50%, 75%, 100% load points)
?
No-load input power <100 mW
?
Simplifies meeting ENERGY STAR 2.0, 80 Plus and EuP requirements
?
725 V MOSFET rating allowed high turns ratio (VOR) and use of 60 V Schottky output diode
?
Low cost, low component count and small PCB footprint solution
?
Performance met without synchronous output rectification
?
132 kHz operation optimized core size and efficiency performance
?
Low-profile eSIP package
Integrated Protection and Reliability Features
?
Line under-voltage lock out (UVLO)
?
Primary sensed latching output overvoltage shutdown (OVP) with fast AC reset
?
Auto recovery output over current (OCP)
?
Meets limited power source (LPS) <100 VA requirement with a single point of failure
?
Accurate thermal shutdown with large hysteresis
圖3.設計案例PCB外形圖(2.97 x 2.14 吋).
設計電源指標:
圖4. 12V 30W設計案例電路圖
設計案例材料清單:
圖5. 12V 30W設計案例變壓器電框圖
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