WS2299 PWM Controller Datasheet

WS2299 Datasheet, PDF, Equivalent


Part Number

WS2299

Description

Current Mode PWM Controller

Manufacture

WINSEMI

Total Page 12 Pages
Datasheet
Download WS2299 Datasheet


WS2299
WS2299 Product Description
Current Mode PWM Controller
Features
Burst Mode Control
6.5uA ultra-low startup current
2.3mA Low operating current
Built-in Leading-edge blanking
Built-in synchronous slope compensation circuit
Current Mode Operation
Soft-start 4ms
Soft-driver
Optional latch for OTPOLPOVP
External Programmable over temperature protection
Cycle by cycle over current protection (OCP)
Internal OCP compensation
Optional VDD OVP
under voltage lockoutUVLO
Maximum Gate output voltage clamped at 12V
Frequency jittering
Constant Output Power Limit
Self-recovery over load protection (OLP)
Audio Noise Free Operation
Applications
Universal switch power supply equipment and offline AC/DC
flyback power converter
Laptop Power Adapter
Set-Top Box Power Supplies
Open-frame SMPS
Battery Charger
Printer Power
General Description
WS2299 is a high performance current mode PWM
controller, optimized for low power AC/DC adapter
applications.
For lower the standby power and higher RoHS compliant,
the IC offers a Burst Mode control feature and ultra-low
start-up current and operating current, that is, at the
condition of no load or light load, WS2299 can reduce the
switch frequency linearly which minimize the switching
power loss; the ultra-low startup current and operating
current make a reliable power for startup design, and also
large resistor can be used in the startup circuit to improve
switching efficiency.
The internal synchronous slope compensation circuit
reduces the possible sub-harmonic oscillation at high PWM
duty cycle output. Leading-edge blanking on current
sense(CS) input removes the signal glitch due to snubber
diode circuit reverse recovery and thus greatly reduces the
external component count and system cost in the design.
WS2299 offers comprehensive protection coverage with
automatic self-recovery feature, including cycle by cycle
over current protection (OCP), over load protection (OLP),
over temperature protection (OTP), VDD OVP, under
voltage lockout (UVLO). The gate-driven output is clamped
to maximum 12V to protect the external MOSFET.
In WS2299, OCP threshold slope is internally optimized for
65khz switching frequency application to reach constant
output power limit over universal AC input range.
Excellent EMI performance is achieved by using the
Soft-switching and frequency jittering at the
totem-pole-gate-drive output. The tone energy at below
20KHZ is minimized in the design and audio noise is
eliminated during operation. The WS2299 is the ideal
substitute of the linear power supply or the RCC-mode
power, for a better performance of the whole switch power
system and a lower cost.
WS2299 is available in SOP8 & DIP8 package.
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
Copyright@Winsemi Microelectronics Co., Ltd., All right reserved.
W/T-S/D009-Rev.A/2 Mayl.2014
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
0612

WS2299
WS2299 Product Description
Typical Application Circuit
L
EMI
Filtler
N
1 GND
2 FB
3 VIN
4 NC
GATE 8
VDD 7
SENSE 6
RT 5
V+
V-
Pin Definition and Device Marking
WS2299 is available in DIP8 package:
1
GND
2
FB
3
V IN
4
NC
D IP8
SOP8
8
G ATE
7
VDD
6
SENSE
5
RT
WS2299S8/D8P
AXB YM
D: DIP8 S: SOP8 P: no Pb
A:wafer information;
1:Ver.;
a: Package Code
2C:Y+M(2=2012 C=12 Month
(1,2…A=10,B=11,C=12)
Pin Function Description
Pin
Name
Pin
Number
GND
1
FB 2
VIN
NC
RT
SENSE
VDD
GATE
3
4
5
6
7
8
Pin Type
Function Description
GND
Feedback
Input
Startup Input
Ground.
Feedback input pin. The PWM duty cycle is determined by voltage level
into this pin and the current-sense signal at Pin 6 The internal protection
circuit will automatically shutdown when the FB voltage level exceeds a
preset threshold voltage.
Connected through a large value resistor to rectified line input for Startup
IC supply and line voltage sensing.
OTP Setting
Current
Monitoring
Power
Gate-driven
output
Temperature sensing input pin. Connected through a NTC resistor to
GND.
Current sense input. Connected to MOSFET current sensing resistor
node.
Power supply
Totem-pole gate driver output for power MOSFET.
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
www.winsemi.com Tel : +86-755-8250 6288 Fax : +86-755-8250 6299
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
2/12


Features WS2299 Product Description Current Mode PWM Controller Features � Burst Mod e Control � 6.5uA ultra-low startup c urrent � 2.3mA Low operating current � Built-in Leading-edge blanking � Built-in synchronous slope compensation circuit � Current Mode Operation � Soft-start 4ms � Soft-driver � Opt ional latch for OTP、OLP、OVP � Ext ernal Programmable over temperature pro tection � Cycle by cycle over current protection (OCP) � Internal OCP comp ensation � Optional VDD OVP � under voltage lockout(UVLO) � Maximum Gate output voltage clamped at 12V � Frequency jittering � Constant Output Power Limit � Self-recovery over loa d protection (OLP) � Audio Noise Free Operation Applications Universal switc h power supply equipment and offline AC /DC flyback power converter � Laptop Power Adapter � Set-Top Box Power Sup plies � Open-frame SMPS � Battery C harger � Printer Power General Descri ption WS2299 is a high performance current mode PWM controller, optimized for low power AC/DC adapter applications. Fo.
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