NCP1365: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source

The NCP1365 offer a new solution targeting output power levels from a few watts up to 20 W in a universal-mains flyback application. Thanks to a novel method this new controller eliminates the need for a secondary feedback circuitry (typically an opto-coupler and TL431 reference) while achieving excellent line and load regulation. The NCP1365 operates in valley lockout quasi-resonant peak current mode control mode at high load to provide high efficiency. When the power on the secondary side starts to diminish, the controller automatically adjusts the duty-cycle then at lower load the controller enters in pulse frequency modulation at fixed peak current with a valley switching detection. This technique allows keeping the output regulation with tiny dummy load. Valley lockout at the first 4 valleys prevent valley jumping operation and then a valley switching at lower load provides high efficiency.

特性

No frequency clamp, 80 or 110 kHz Maximum Switching Frequency
Quasi-Resonant with Valley Switching Operation
560-V Startup Current Source
Fixed Peak Current & Deep frequency foldback @ light load operation
Cycle by Cycle peak current limit
Wide Operation VCC range (up to 28 V)
Internal Temperature Shutdown
CS & Vs/ZCD pin Short and Open Protection
Constant Current Primary-side feedback eliminates secondary controller
±10% Current Regulation
Build-in soft-sart
Low Start-up current (2.5 μA typ.)
Clamped Gate-drive Output for Mosfet
Less than 10 mW No-Load Performance

优势

Prevents high frequency interference with a touchscreen
Offers high efficiency operation
Saves external HV FET or inefficient resistor divider
Low consumption at light load
Safe operation
Design flexibility
Safe operation
Safe operation

应用

AC-DC USB chargers for cell phones, tablets, and other portable devices

终端产品

AC-DC USB chargers for cell phones, tablets, and other portable devices

设计和开发工具 (1)

Document Title	Document ID/Size	Revision	Revision Date
NCP1360, NCP1361, NCP1365, NCP1366 Design Mathcad worksheet	NCP1360 Design Worksheet Mathcad (508kB)	2.1	Apr, 2015

评估板文档 (4)

Document Title	Document ID/Size	Revision	Revision Date
NCP1365XS1GEVB Bill Of Materials (ROHS Compliant)	NCP1365XS1GEVB_BOM_ROHS.pdf (61kB)	0
NCP1365XS1GEVB Gerber Layout Files (Zip Format)	NCP1365XS1GEVB_GERBER.zip (28kB)	0
NCP1365XS1GEVB Test Procedure	NCP1365XS1GEVB_TEST_PROCEDURE.pdf (155kB)	0
NCP1365XS1GEVBGEVB Schematic	NCP1365XS1GEVBGEVB_SCHEMATIC.pdf (81kB)	0

数据表 (1)

Document Title	Document ID/Size	Revision	Revision Date
Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with/without High Voltage Startup Current Source	NCP1360/D (370kB)	4	Mar, 2016

封装图纸 (1)

Document Title	Document ID/Size	Revision
SOIC 7 CASE OUTLINE	751U (62.0kB)	E

评估板与开发工具

产品	状况	Compliance	简短说明
NCP1365XS1GEVB	Active	Pb-free	Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source Evaluation Board

产品订购型号

产品	状况	Compliance	封装		MSL*	容器		预算价格 (1千个数量的单价）
NCP1365AABCYDR2G	Active	Pb-free Halide free	SOIC-7	751U	1	Tape and Reel	2500	$0.22
NCP1365ACBAXDR2G	Active	Pb-free Halide free	SOIC-7	751U	1	Tape and Reel	2500	$0.2933
NCP1365BABCYDR2G	Active	Pb-free Halide free	SOIC-7	751U	1	Tape and Reel	2500	$0.22

订购产品技术参数

Product	Topology	Control Mode	fsw Typ (kHz)	Stand-by Mode	UVLO (V)	Short Circuit Protection	Latch	Soft Start	VCC Max (V)	Drive Cap. (mA)
NCP1365AABCYDR2G	Flyback	Current Mode	Variable	Yes	6.5	Yes	Yes	Yes	28	2000 / 1000
NCP1365ACBAXDR2G
NCP1365BABCYDR2G	Flyback	Current Mode	Variable	Yes	6.5	Yes	Yes	Yes	28	2000 / 1000