PWM Controller. WS2283 Datasheet


WS2283 Controller. Datasheet pdf. Equivalent


Part Number

WS2283

Description

Current Mode PWM Controller

Manufacture

WINSEMI

Total Page 10 Pages
Datasheet
Download WS2283 Datasheet


WS2283
WS2283 Product Description
Features
■ Burst Mode Control
■ 5uA ultra-low startup current
■ 1.8mA Low operating current
■ Built-in Leading-edge blanking
■ Built-in synchronous slope compensation circuit
■ Built-in Soft-Start
■ 65kHz fixed switch frequency
■ Cycle by cycle over current protection (OCP)
■ VCC over voltage clamp & under voltage lockout( UVLO)
■ Over load protection (OLP)
■ OTP and OVP shut down latch
■ Maximum Gate output voltage clamped at 13.8V
■ Frequency jittering
■ Adjustable OVP through external Zener
■ Ultra low standby power (<100mW)
Applications
Universal switch power supply equipment and offline AC/DC
flyback power converter
■ Power Adapter
■ Set-Top Box Power Supplies
■ Open-frame SMPS
■ Battery Charger
Current Mode PWM Controller
General Description
WS2283 is a high performance current mode PWM controller,
optimized for low power switch equipment.
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, WS2283 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. WS2283 offers comprehensive
protection coverage with automatic self-recovery feature,
including cycle by cycle over current protection (OCP), over
load protection (OLP), VCC Clamp, under voltage lockout
(UVLO), OTP and OVP shut down latch. The gate-driven
output is clamped to maximum 13.8V to protect the external
MOSFET.
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 WS2283 is the ideal
substitute of the linear power supply or the RCC-mod e power,
for a better performance of the whole switch power system
and a lower cost.
WS2283 is available in SOT23-6 package.
Typical Application Circuit
L
EMI
Filter
N
V+
V-
1 G N D Ga te 6
2 FB
VCC 5
3
RT
4
CS
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.
WIN SEM I M ICROELECTRON ICS
W/T-Y041-Rev.A/1 May.2014
WIN SEM I M ICROELECTRON ICS
0214

WS2283
WS2283 Product Description
Pin Definition and Device Marking
1
GND
6
G AT E
2
FB
SO T2 3 -6
5
VCC
3
RT
4
CS
6
83 YMF
1
SOT23-6
83: WS2283;
Y: Year 2=2012
M: Month 1,2…A=10,B=11,C=12
F: Factory No.
Pin Function Description
Pin Pin
Name
Number
GND
1
Pin Type
GND
FB 2
Feedback Input
RT
CS
VCC
GATE
3
4
5
6
OTP Setting
Current Monitoring
Power
Gate-driven output
Function Description
Ground.
Feedback input pin. The PWM duty cycle is determined by voltage level
into this pin and the current-sense signal at Pin 4. The internal
protection circuit will automatically shutdown when the FB voltage level
exceeds a preset threshold voltage.
Dual function pin. Either connected through a NTC resistor to ground for
over temperature shut down/latch control or connected through Zener
to VCC for adjustable over voltage protection.
Current sense input.
Power supply
Totem-pole gate driver output for power MOSFET.
Block Diagram
GND 1
FB 2
Trim m e d
Voltage/
Current
Reference
Internal
Reference
Soft
Driver
Mode
Select
OLP
Inter 5 V supply P O R
Ti m e r
Logic
Fault
Management
regulator U V L O
Vcc_OVP
6 G a te
5 VCC
RT 3
OYP/
OVP
LEB
Soft
Start
4 CS
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
2/10


Features WS2283 Product Description Features ■ Burst Mode Control ■ 5uA ultra-low s tartup current ■ 1.8mA Low operating current ■ Built-in Leading-edge blank ing ■ Built-in synchronous slope comp ensation circuit ■ Built-in Soft-Star t ■ 65kHz fixed switch frequency ■ Cycle by cycle over current protection (OCP) ■ VCC over voltage clamp & unde r voltage lockout( UVLO) ■ Over load protection (OLP) ■ OTP and OVP shut d own latch ■ Maximum Gate output volta ge clamped at 13.8V ■ Frequency jitte ring ■ Adjustable OVP through externa l Zener ■ Ultra low standby power (<1 00mW) Applications Universal switch pow er supply equipment and offline AC/DC f lyback power converter ■ Power Adapte r ■ Set-Top Box Power Supplies ■ Op en-frame SMPS ■ Battery Charger Curr ent Mode PWM Controller General Descrip tion WS2283 is a high performance curre nt mode PWM controller, optimized for l ow power switch equipment. For lower th e standby power and higher RoHS compliant, the IC offers a Burst Mode control feature and ultra-low s.
Keywords WS2283, datasheet, pdf, WINSEMI, Current, Mode, PWM, Controller, S2283, 2283, 283, WS228, WS22, WS2, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)